World record Sessions on Micrososft Latest Technologies

Join World record free online sessions on Microsoft technologies from Sat to Mon.

This is the first time any community arrange such huge concert. Following are the some highlights of sessions:

1. Key notes from Abhishek kant - MVP Lead of Micrososft
2. Key notes by Ashwin U. Kini - Regional Chairman APAC (Asia-Pacific)
3. Closing notes by Chandershekhar Thota - MVP, Founder of HyderabadTechies.info
4. Special Sessions by Meetu Choudhary - First MVP from Jaipur, founder of Msdotnetmentor.com
5. Around 45-48 Sessions on different Topics by valuable Speakers.

For more details and how to join the sessions, take a look at : http://hyderabadtechies.info/index.php/world-record-sessions-by-us

Session : Basics of Silverlight

Today, I had a Session on Basics of Silverlight

Highlights

Session is started after Chandershekhar's Speech on VS2010 and a Small session thereon.

1. Start with the basics
2. What is Silverlight?
3. Why we use Silverlight?
4. Framework and Architectural view of Silverlight?
5. Sumed up with how to create a Simple Application.

The attendees are very good, there are lot of questions in this session. Unfortunately, there was some problem with my Visual Studio so, was unable to present live Demo. We decided to present a demo in next coming sessions.

We have shared all the presentation contents at : Hyderabad Techies.

There are planned session in next coming days.

You are invited to join!

Free Online Sessions

Lets finger crossed we have started Free Online Sessions

Session Details of 22nd November'2009

1. Declarative WebForms Routing by Chandrashekar Thota

2. Dynamic Metadata by Chandrashekar Thota

3. Silverlight Basics by Gaurav Arora

4. Microsoft Chart Control by Kiran Kumar Koyelada

Visit for more detail: http://hyderabadtechies.info/index.php/events

Appreciation from DotnetSpider

Its a gain a Good Morning for me:

My hat-trick in DotNetspider

I want to share with all of you guys that in the month of october I made hat-trick, I got three consequent awards from DotNetSpider.com, for my involvement in the community.

Refer to the Announcements:

http://www.dotnetspider.com/forum/228584-Best-Forum-Supporter-Award-th-Oct-st-October.aspx

http://www.dotnetspider.com/forum/228569-Certificates-winners-sent-st-October.aspx

Window.open method at a glance

Windo.open method is very good when we need some client scripting. Many people ask me why we the need of window.open() method we can you some others too for the purpose to open the popup windows.

What is a Lambda expression?

A Lambda expression is nothing but an Anonymous Function, can contain expressions and statements. Lambda expressions can be used mostly to create delegates or expression tree types. Lambda expression uses lambda operator => and read as ‘goes to’ operator.

Left side of this operator specifies the input parameters and contains the expression or statement block at the right side.

Example: myExp = myExp/10;

Now, let see how we can assign the above to a delegate and create an expression tree:

delegate int myDel(int intMyNum);
static void Main(string[] args)
{
//assign lambda expression to a delegate:
myDel myDelegate = myExp => myExp / 10;
int intRes = myDelegate(110);
Console.WriteLine(”Output {0}”, intRes);
Console.ReadLine();
//Create an expression tree type
//This needs System.Linq.Expressions
Expression myExpDel = myExp => myExp /10;
}

Note:

The => operator has the same precedence as assignment (=) and is right-associative.

Lambdas are used in method-based LINQ queries as arguments to standard query operator methods such as Where.

Web Space, Domain Registrations, Web solutions, SEO Tips

After millions of search, I finally got the Web Hosting, Unlimited, Web Solution, SEO Tips

They provide complete solution and Web hosting of sites for multiple platforms containing all Windows, Linux under one roof.

I got a plan from there and get benefited:

They provide complete solution and Web hosting of sites for multiple platforms containing all Windows, Linux under one roof.

I got a plan from there and get benefited.

SQL Server training courses

Are you looking for SQL Server 2008 training courses ? Do you want to become a SQL Server DBA without any prior experience in IT field ?

The training will led directly by Tony John, founder and architect of dotnetspider.com. Tony John is a Microsoft MVP with over 13 years of experience in Microsoft technologies.

Click here for more details about SQL Server training courses

How to stop Searchprotocolhost.exe on WIndowsXP?

Problem:How to stop Searchprotocolhost.exe on WIndowsXP?

Sol: Searchprotocolhost.exe is one of the reason to make your system slow. Following are the step(s) to stop this and make system fast.

1. Click Start -> Run or Press Windows + R

2. Type services.msc and press 'Ok' or click 'Enter'

3. Scroll down to find 'Windows Search' and double click

4. Stop the process

Another step to disable it from Startup:

5. Reapeat step number 1

6. Type 'msconfig' and press 'Ok' or click 'Enter'

7. Click on 'Startup' tab

8. Uncheck 'Windows Search' checkbox

9. Click Ok.

Restart your system.

To verify :

Open your TaskManager by pressing 'Ctrl+Alt+Del' and locate for Searchprotocolhost.exe in process tab.

Debugging WCF Services : At a glance

Debugging a WCF Service

Following are the 3-different ways to start debugging a WCF service:

· When you are debugging a client process that calls a service. Here debugger steps into the service also service does not have to be in the same solution as your client application.

· When you are debugging a client process that requests to a service and here service must be a part of your solution.

· When you are using Attach to Process to attach to currently running service. Here debugging begins inside the service.

Debugging with Visual Studio 2008

Using Visual Studio 2008, one can step into a WCF service. One can hit break points inside the WCF service, if the WCF service is in the same solution as the client.

For stepping to work, you must have debugging enabled in the app.config or Web.config file we will discuss later on the limitation and how to enable debugging.

To step into a WCF Service

1. First you need to create a Visual Studio solution that contains both the WCF client and WCF service projects.
2. Now from Solution Explorer, right-click the WCF Client project and then click Set as Startup Project.
3. Then enable debugging in the app.config or web.config file
4. Mark a breakpoint at the location in the client project where you want to start stepping (just before the WCF service call).
5. Now, Run to the breakpoint, then begin stepping. The debugger will step into the service automatically.

Limitations of Debugging a WCF Service

1. Stepping Into a Service

The following conditions should be met when you start To step into a service from a client applications:

· Service must be called bys using a synchronous client object.

· One-way contract operation is not allowed.

• Debugging must be enabled

2. Stepping Out of a Service

The limitations are the same as described the above, in addition, here the debugger must be attached to the client.

This is because while you are debugging a client and step into a service, the debugger remains attached to the service whether you started the client by using Start Debugging or attached to the client by using Attach to Process.

But while you are debugging by attaching to the service, the debugger is not yet attached to the client. In that case, you must first use Attach to Process to attach to the client manually.

Debugging must be enabled

3. Automatic Attach to a Service

Automatically attaching to a service has the following limitations:

· In this case the service must be part of the solution you are debugging.

· The service must be hosted. Which means it may be part of a Web Site Project (File System and HTTP), Web Application Project (File System and HTTP), or WCF Service Library project. WCF Service Library projects can be either Service Libraries or Workflow Service Libraries.

· WCF client must be invoked the service.

· Debugging must be enabled

Enabling Debugging a WCF Service

Use following piece of lines in web.config or asp.config file(s):

<system.web>

<compilation debug="true" />

<system.web>

Note: In case when you use Attach to Process on a service, the debug code is automatically added to the .config file.

How to Debug a Self-Hosted WCF Service?

In simple words WCF service which does not run inside IIS, WCF service Host or ASP.NET Development Server is know as Self-Hosted Service.

To debug such services we need to configure Visual Studio to launch both client and server when you choose Start Debugging on the Debug menu.

How to start both client and host from Visual Studio?

1. Need to create a Visual Studio solution pertaining both the client and server projects.

2. Now configure the solution to start both client and server :

a. From Solution Explorer, right-click the solution name.

b. Click Set Startup Projects.

c. In Solution from Properties dialog box, select Multiple Startup Projects.

d. Click Action and choose Start from the Multiple Startup Projects grid, on the line that corresponds to the server project also on the line that corresponds to the client project, click Action and choose Start.

e. Finally click OK.

Silverlight 3 Planned to release

As per Microsoft promise, Silverlight 3 is coming very soon. Finally, Silverlight 3 is ready to launch on July 10 including its Expression Blend Studio 3 family of designer tools.

Silverlight 3 adds some fetures:

1. 3D Support


2. GPU acceleration


3. H.264 video support


4. Out-of-browser support

out-of-browser support will allow Silverlight apps to run on Windows or Mac clients and provide users with online, offline or intermittently connected access to their Silverlight apps and content.

Right now, Silverlight 3 beta version is available for download

Interview with Dotnetspider.com - MVM award

In continuation on my award of MVM from dotnetspider.com, DNS published my interview on this award.

In this interview I have shared my views with Raghav on my this achievement.

The tenure of interview is around 60-minutes, I really enjoyed with Raghav.

Here is the link of my interview : http://www.dotnetspider.com/forum/206904-Few-moments-with-Gaurav-Arora-DotNetSpider-MVM.aspx

Visual Studio 2010 Beta-I : Ready to work

Its a great day for all techie today.
Microsoft released its new Visual Studion version.

Finally, Visual Studio 2010 Beta-I is released and available to download.

Get the cheat Sheet at : http://blogs.msdn.com/danielfe/archive/2009/05/20/visual-studio-2010-beta-1-cheat-sheet.aspx

Defining and using styles in Silverlight

Defining and using styles in Silverlight

Lets take practical scenario for Styles in Silverlight.

Silverlight allows re-useable styles to be created to avoid duplication:


<Button x:Name="btnSubmit" FontFamily="Arial"
FontWeight="Bold" Width="100" Height="25"
Margin="10" />

<Button x:Name="btnCancel" FontFamily="Arial"
FontWeight="Bold" Width="100" Height="25"
Margin="10" />

We can also create Global Styles using app.xaml file


<Application.Resources>
<Style x:Key="ButtonStyle" TargetType="Button">
<Setter Property="Width" Value="100" />
</Style>
</Application.Resources>


Applying Styles to Controls:

With the help of Style property we can apply the global style to the properties:

<Button x:Name="btnSubmit" Content="Submit"
Click="btnSubmit_Click"
Style="{StaticResource ButtonStyle}" />


Silverlight : DataGrid Control

DataGrid

DataGrids are fundamental UI controls. They radically simplify the task of displaying structured data to users by automatically handling the rendering of rows, columns, headers, and data navigation. Silverlight's data grid is no exception. While it is far from being a complete or "advanced" grid control by today's WinForms and ASP.NET standards, it does provide basic grid functionality.

To use the DataGrid control, you must simply bind the Grid to a list of items (that implement IEnumerable) via the ItemSource property. In the simplest approach, the Grid will automatically generate columns based on the data you supply and even render "special" column types- like checkbox columns- based on your data types. You can, of course, take more control and manually define the columns that will be rendered in your grid by setting the AutoGenerateColumns property to false.

We have to add following namespace to use DataGrid:
xmlns:my="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data"


<my:DataGrid x:Name="myDataGrid" AutoGenerateColumns="true" />


Silverlight Top 8 Frequently Asked Questions

Q. What is Silverlight Tool Kit?

Ans: To create an application or game you need to design, code and give some extra feature to your output. 

To do the above, you need some controls, IDE etc.

Silverlight Tool kit is nothing but is a collection of Silverlight Tools, Components etc. It includes source code describing the all you need to develop an application.

Please visit this link for more info:http://www.codeplex.com/Silverlight

Q. Can I add more than one .xaml pages in silverlight application?

Ans: Yes, you can have multiple .xaml files in a single project.

In the App.xaml, in the method Application_Startup you can choose, which page you want to initially display.

Q. How can I create image pieces/sub image?

Ans: In straight way you can''t create a subimage from an existing image. Here you just clip an image, Clipping is just different from Cropping. In clipping, first you have to dictate which part of the images to draw and later you have to remove all but the desired part of the image. Silverlight does not support cropping.

Q. How does Silverlight 2 differ from Adobe Flash?

Ans: As I am from .Net background so in my views you can get C# / Vb.net compiled code but in Flash there is only action script.

You can find difference in depth at : http://silverlight.net/forums/t/3015.aspx

Q. How can I switch to Expression Blend from Visual Studio?

Ans: Expression blend provide great extensibility for XAML files.To switch to Expression Blend, right-click on the XAML file and select Open in Expression Blend.

Q. What happened when I press F5 within Visual Studio to run Silverlight application?

Ans: When you run the Silverlight application within Visual Studio, a new folder created in the web-site project for silverlight solution and it happened only first time. The folder name is ClientBin and having package with XAP extension which contains compiled project.

Q. Can you elaborate how to start a silverlight application with Visual Studio?

Ans : You can find a fully described article from http://www.silverlightclub.com/resources/1858-silverlight-lets-start-building-applications.aspx.aspx

In the following step(s) I am giving the ideas all about:

1.Create a project:Here you just start your visual studio, Select your programming language [C#/VB], Choose Silverligh Template give the name and save it.

2. Adding SIlverlight COntrols:One thing is happened here, controls cannot dragged onto the designer, you can draw/drag the controls on XAML page.

(a) Naming to control:In this step just give the name to your silverligt control like for Button you can give name as : btnmySilverligtButton

(b)Adding event handlers to Silverlight controls:Here you can give the event handlers like for click etc.

(c)Testing Silverlight applications in Visual Studio:Now just press F5 and test your application

Q. What is the best place to start Silverlight application?

Ans: There is no hard and fast rule to start Silverlight application. Every developer can start as per his/her experience. like as per my case I always prefer Visual Studio. SO, in my view Visual Studio is the best place to start with Silverlight2 applications.Microsoft provides templates for creating Silverlight applications and libraries in C# and Visual Basic.

Microsoft TechEd-2009

Lets cheers, its a good news for all Microsoft lovers.
Microsoft TechEd2009 will be conducting in Hyderabad from May13 to May15.

Main attention of the eve is Steven A. Ballmer,CEO Microsoft. This is the greatest and biggest eve in India and expecting to see a huge crowd from developer community.

To grab more details please visit : Microsoft TechEd2009.

Activities of CodeDigest - May'2009

CodeDigest For the Month 5\2009
This Month Contest
Universal TV/VCR/DVD Remote Controller Watch with World Time Contribution Required:4 articles or 6 code snippets
USB AA/AAA Battery Charger Contribution Required:2 articles or 3 code snippets
Mini Pig 2 LEDs Flashlight White Contribution Required:For Participation
New Articles Published
Edit,Update and Delete in GridView using DataKeys Edit,Update and Delete in GridView using DataKeys,A datakey represents the primary key field or field of a record in a data-bound control. Many a times in our applications we use primary keys to get control of the particular record in the gridview. For this situation, many developers use invisible columns (Hidden columns) in the gridview to identify that row. We can achieve the same functionality using Datakeys.
Beginning Silverlight Development Beginning Silverlight Development,Microsoft introduced Rich Internet Application with the introduction of Silverlight which is a very lightweight and a client-side application.
Better Practices on Building High Performance Web Pages This article details out the better practices on how to get the most out of your web pages in terms of delivering, parsing and rendering the content on a web browser.
Optimizing Performance in WPF Applications This article explains how to optimize your XAML markup to speed up your WPF applications.
How to perform WPF Data Binding using LINQ to XML Most of the times, you may have to display XML data in your WPF applications. Traditionally, you might use XML plug-ins offered by ADO.NET. But, LINQ is the mantra now. Using LINQ to XML, it is much easier and fun to bind your WPF controls and perform data binding as a new fashion.
Using HyperLink Control in DataBound Controls In this article, I will explain different ways of using hyperlink control in data bound controls like GridView,DataList and Repeater control.
How to skip SharePoint spell check for an input control KwizCom's VP R&D Shai Petel makes complex SharePoint issues – simple. Here he explains how to skip SharePoint spell check for an input control.
Picasa Style Photo Album Using ListView Control in ASP.Net 3.5 ListView is a new databound control that is shipped with ASP.Net 3.5. Read my previous article - ListView Control in ASP.Net 3.5 which elaborates the usage of this new control. ListView control is one of the most flexible databound control that can be used to present the data in any custom format. Moving forward, in this article we will use this new control to create Google’s Picasa style photo album.
Building Collapsible Panel Control using jQuery in ASP.Net Page It is a technique where we can provide expand/collapse feature to a section of page. Technically, it is nothing but providing expand/collapse feature to a DIV element. So, a page with lengthy content can make use of this feature to display only less content and show the full content on demand.
Single Button Click Custom Control This article demonstrates a custom control for button which gets disabled after user clicks on it so that we can stop user to resubmit the same information again and again intentionally or unintentionally. Here, when user clicks on submit button, its first checks the validation part. After passing it, the data gets posted & button gets disabled. After that the button gets enabled for new submission. Also the text written in the textbox gets changes dynamically.
Useful Tools for Web Developers There are so many handy tools that we use in our day to day life to simplify our work. This article will list some of the useful tools that a webdeveloper should be aware.
Silverlight 2 Controls – Overview In the present article we will learn something about the available Silverlight Controls.Silverlight Controls basically can be divided into: Layout Controls, Input Controls, Media Controls and Other Controls.
How to perform WPF Data Binding using LINQ to XML - Part 2 This article is a sequel to the previous artile that shows how to perform binding to inline XML data using XLINQ objects. In this part, we discuss how to bind to an XML file using XLINQ objects and details out a sample application.
Choosing the Right DataBound Control in ASP.Net There are various databound controls available in ASP.Net to display data. For example: GridView, DataList, Repeater, ListView, etc. Whenever we get a requirement to display data, there is always a confusion to choose the right databound control that can satisfy our needs. This article will help you to understand all these controls and their advantage in a particular scenario which can help us to choose the right control that can fit our needs.
New Codes Published
WaterMark in ASP.Net TextBox using JavaScript
Encrypting/Decrypting Connection String in ASP.Net
Using RegisterClientScriptBlock() Methods of ClientScriptManager Class
Using RegisterStartupScript() Methods of ClientScriptManager Class
Using RegisterOnSubmitStatement() Method of of ClientScriptManager Class
Accessing Master Page Members from Content Pages in ASP.Net
New FAQs Published
What is jQuery? How to use it in ASP.Net Pages?
How to enable jQuery intellisense in Visual Studio 2008?
How to use jQuery intellisense in an external javascript file?
How to get image pieces in Silverlight2?
Can you elaborate how to start a silverlight application with Visual Studio?
How does Silverlight 2 differ from Adobe Flash?
What are virtual path providers?
Last Month Winners
Winner:balamurali balaji 1.5" LCD Rechargeable Digital USB Photo Frame Keychain (107-Picture Memory Storage) Contribution Done:4 Articles Or 8 CodeSnippets
Winner:ph madala Stylish Moonbeam Bedside Digital Clock Contribution Done:3 Articles Or 6 CodeSnippets
Winner:balamurali balaji LED keychain Contribution Done:For Participation
Winner:Gaurav Arora LED keychain Contribution Done:For Participation

MVM from DotnetSpider.com

Its a very cool Morning today. I got a mail from Raghav , The webmaster of http//:dotnetspider.com regarding the Most Valuable Member award from Dotnetspider. This is the moment of my dreams come true. Here are the few lines from the mail :

Congratulations from dotnetspider.com! Your contributions to the technology world is recognized by dotnetspider.com, one of the most respected technology community. We are glad to inform you that you are selected as the MOST VALUABLE MEMBER (MVM) for your active participation and contribution to dotnetspider.com. You will be awarded with a certificate of appreciation from us.Visit this page for the list of winners - http://www.dotnetspider.com/credits/Index.aspx

My thanks to DNS family for this award and special thanks to Raghav who have nominated me for this prestigious award.

Became The Webmaster from a Member

Today I want to share my words of Journey with DNS from a Member to a Webmaster.

My journey with DNS is started on 7/19/2008 5:11:57 PM. I have registered with Dotnetspider.com a MicroSoft.Net community as a new member with profile Gaurav Arora 

As I was a very new in this community site I was not aware from rules/regulations also, “to err is human” so, its natural that I did mistakes. I am technical and know how to do Techie stuffs but not aware from the right way. In this period I have met many diamond members and other Sr. members who guided me "How to present stuffs in DNS?".

I met with Raghav he guided me lot of stuffs. As time passed away I got matured in DNS and Raghav found me suitable for Editorial work and he selected me as an Editor for DNS. This is the truning point of my life in DNS. Afterwards, Admins of DNS selected me Senior Editor.  

Now I became a Diamond member and a Webmaster of DNS

Its just start of my Jorney, Tony who found me suitable for my work so, he gave me another responsibility of his another site Silverlight Club as a Webmaster

I am still trying to do my more efforts to prove myself also still learning more stuff.

The journey is still continue... 

 

Silverlight Games Site - Silverlight Club

Its a great day for me, on 01st April'2009 finally Silverlight Game Site launched.

The main motive of Silverlight Club is to promote Microsoft Silverlight . Tony John is the Founder and Admin of the Site. I am taking as a Webmaster of the site.

We are looking some good Silverlight Experts , also we are running a Contest on the Site for Silverlight Games.

To check more please visit : http://www.silverlightclub.com/pages/AboutUs.aspx

MicroSoft Released - Silverlight 3- Beta

MicroSoft Released - Silverlight 3- Beta

MicroSoft Released its Silverlight3 beta in MIX [conference for designers and developers at Las Vegas].

Its available for download at:

1. MicroSOft Silverlight 3 SDK Beta 1
2. MicroSoft Silverlight 3 Tools Beta 1 for Visual Studio 2008 SP1
3. The MicroSoft 3 beta Runtime

How to create ASPX Page Dynamically - A Step Ahead Series?

Introduction

In a simple creating an aspx page dynamically is a very tedious job. Whenever we think for dynamically creation scenarios stuck in mind about the overload to server etc. But with the help of this article one can attain the same as easily as creating another simple aspx page.

Need and Requirement

Now next words came to mind that what is the need to create an aspx page dynamically? Let me explain it:

1. You need to create a page, based on selected requirement at the moment.


2. Need to create a page from static html contents.


3. Having huge data, need to represent in an individual page and its tough to store in database.

Article Scenario

As stated above, I choose a scenario where you are running a technical community and need to the template where member of your site will able to write some static html contents.

Explanation

For the same we need following pages:
1. PageHeader.ascx
This contains the header information of your page like LOGO etc.

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="PageHeader.ascx.cs" Inherits="myTemplates_PageHeader" %>
<link href="../style.css" rel="stylesheet" type="text/css" />
<div>
<asp:PlaceHolder ID ="plhImage" runat="server" />
<ul class="menu">
<li><a href="./default.aspx">HOME</a></li>
<li><a href="./default.aspx">About US</a></li>
<li><a href="./default.aspx">Recent Posts</a></li>
<li><a href="./default.aspx">Site Map</a></li>
<li><a href="./default.aspx">Contact US</a></li>
<li><a href="./default.aspx">Tags</a></li>
<li><a href="./default.aspx">Meta</a></li>
<li><a href="./default.aspx">Most Emailed</a></li>
</ul>
</div>

2. PageFooter.ascx
Obvious it contains the Footer information.

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="PageFooter.ascx.cs" Inherits="myTemplates_PageFooter" %>
<link href="../style.css" rel="stylesheet" type="text/css" />
<div id="footer">
<div>
<a href="http://www.webdesign.org">Web Design</a> by <a href="http://www.freetemplatesonline.com">Free Templates</a> Online<br />
<a href="#">Terms of Use</a> / <a href="#">Privacy Policy</a>
</div>
<div class="centeral-block">
<strong>New-York, USA</strong>
11 Some Street Second Floor<br /> New York WA 02020
</div>
<div>
Tel/Fax : 1(800)123-4567<br />
              1(800)123-1234<br />
E-mail : <a href="#" id="mail">info@yourcompany.com</a>
</div>
</div>

Click to check Snapshot

3. createPage.ascx
Definitely this is the main page, it just create a skeleton as per the above requirement and then segregate the contents and make the title.

<%@ Control Language="C#" AutoEventWireup="true" CodeFile="createPage.ascx.cs" Inherits="myTemplates_createPage" %>
<div>
<table>
<tr>
<td style="width: 100px">
Page Title
</td>
<td style="width: 100px">
<asp:TextBox ID="txtTitle" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 100px">
Tags
</td>
<td style="width: 100px">
<asp:TextBox ID="txtTags" runat="server"></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 100px">
Description
</td>
<td style="width: 100px">
<asp:TextBox ID="txtContent" runat="server" Height="292px" TextMode="MultiLine" Width="510px"></asp:TextBox>
</td>
</tr>
<tr>
<td style="width: 100px">
</td>
<td style="width: 100%">
<ul>
<li><font color="red">You may use basic html tags like <H1> <H2> <B>
<I> <FONT> etc. </font></li>
<li><font color="red">Tags like <BODY> <HEAD> <TABLE> are NOT allowed.</font></li>
<li><font color="red">Please check spelling before posting articles.</font></li>
</ul>
</td>
</tr>
<tr>
<td style="width: 100px">
</td>
<td style="width: 100px">
<asp:Label ID="lblMessage" runat="server"></asp:Label>
</td>
</tr>
<tr>
<td style="width: 100px">
</td>
<td style="width: 100%">
<asp:LinkButton ID="lnkNewPage" OnClick="lnkNewPage_Click" runat="server"></asp:LinkButton>
</td>
</tr>
<tr>
<td style="width: 100px">
</td>
<td style="width: 100px">
<asp:Button ID="btnGenerate" runat="server" OnClick="btnGenerate_Click" Text="Generate" />
</td>
</tr>
</table>
</div>

Click to check Snapshot

4. Default.aspx
This is the page or container which contains above all 3-controls.

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" ValidateRequest="false" %>

<%@ Register TagPrefix="myPage" TagName="aspxPage" Src="~/myTemplates/createPage.ascx" %>
<%@ Register TagPrefix="myPageHeader" TagName="PgHeader" Src="~/myTemplates/PageHeader.ascx" %>
<%@ Register TagPrefix="myPageFooter" TagName="PgFooter" Src="~/myTemplates/PageFooter.ascx" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<form id="form1" runat="server">
<div>
<table width="100%">
<tr>
<td colspan="2">
<myPageHeader:PgHeader ID="PgHeader1" runat="server" />
</td>
</tr>
<tr>
<td>
<h2>
Create Dynamic Page(S)</h2>
</td>
</tr>
<tr>
<td colspan="2">
<myPage:aspxPage ID="asxPage1" runat="server" />
</td>
</tr>
<tr>
<td colspan="2">
<myPageFooter:PgFooter ID="PgFooter1" runat="server" />
</td>
</tr>
</table>
</div>
</form>
</body>
</html>

5. myPageTemplate.tmp
This is the template page for all pages

<%@ Page Language="C#" CodeFileBaseClass="PageBase" AutoEventWireup="true" CodeFile ="myPageCode.cs"
Inherits= "myPageCode" PageID="[ID]" MetaTitle="[MetaTitle]" MetaKeywords="[MetaKeywords]" %>
<%@ Register TagPrefix="myPageHeader" TagName="PgHeader" Src="~/myTemplates/PageHeader.ascx" %>
<%@ Register TagPrefix="myPageFooter" TagName="PgFooter" Src="~/myTemplates/PageFooter.ascx" %>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<link href="style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<form id="form1" runat="server">
<div>
<table width="100%">
<tr>
<td colspan="2">
<myPageHeader:PgHeader ID="PgHeader1" runat="server" />
</td>
</tr>
<tr>
<td>
<h2>
<%=MetaTitle%></h2>
</td>
</tr>
<tr class=content>
<td colspan="2">
[PageContent]
</td>
</tr>
<tr>
<td colspan="2">
<myPageFooter:PgFooter ID="PgFooter1" runat="server" />
</td>
</tr>
</table>
</div>
</form>
</body>
</html>

6. myPageCode.cs
A common code-behind page for all dynamic pages

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class myPageCode : PageBase
{
public String newPageID
{
get
{
if (ViewState["newPageID"] != null)
return Convert.ToString(ViewState["newPageID"]);
else
return "0";
}
set
{
ViewState["newPageID"] = value;
}
}
protected void Page_Load(object sender, EventArgs e)
{
base.PageID = this.newPageID;
}

}

7. PageBase.cs
A pagebase which inherits System.Web.UI.Page.

using System;
using System.Collections.Generic;
using System.Web;
using System.Data;
using System.Configuration;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

///

/// Summary description for PageBase
///

public class PageBase : System.Web.UI.Page
{
public PageBase()
{
//
// TODO: Add constructor logic here
//
}
#region Properties
public String PageID
{
get
{
if (ViewState["PageID"] != null)
return Convert.ToString(ViewState["PageID"]);
else
return "0";
}
set
{
ViewState["PageID"] = value;
}
}
public String MetaTitle
{
get
{
if (ViewState["MetaTitle"] != null)
return Convert.ToString(ViewState["MetaTitle"]);
else
return "No Title";
}
set
{
ViewState["MetaTitle"] = value;
}
}
public String MetaKeywords
{
get
{
if (ViewState["MetaKeywords"] != null)
return Convert.ToString(ViewState["MetaKeywords"]);
else
return "No Keywords";
}
set
{
ViewState["MetaKeywords"] = value;
}
}
#endregion

protected override void OnLoad(EventArgs e)
{
if (!String.IsNullOrEmpty(MetaTitle))
{
HtmlMeta Title = new HtmlMeta();
Title.Name = "Title";
Title.Content = this.MetaTitle;
this.Header.Controls.Add(Title);
}

if (!String.IsNullOrEmpty(MetaKeywords))
{
HtmlMeta Keyword = new HtmlMeta();
Keyword.Name = "Keywords";
Keyword.Content = this.MetaKeywords;
this.Header.Controls.Add(Keyword);
}

//overide base
base.OnLoad(e);
}

void Page_Error(object sender, EventArgs e)
{
//Write Some logic here
}
}

Important

1. Please note that I don’t check for any validation


2. Instead of the use of Custom Control you can use Master Pages too.


3. The same will create a good facility while you need to create dynamic pages.

How to run attached code:

1. Download the zip file
2. Open your Visual Studio2008
3. Open WebProject select the specific folder
4. Press F5 and enjoy

Your suggestions are invited to improve this.

What are constructors in C# - A Step Ahead Series?

Introduction

In a simple words Constructor is nothing but a method, a special kind of method of a class, which gets executed when its (class) object is created.

Now, let’s take above in broader sense, A constructor is a class method automatically executed whenever class’s object is created or whenever class is initialized. Consider following bit of code:

public class MsDotNetHeaven
{
public MsDotNetHeaven()
{
//A default Constructor
}

//Class members

}

In above snippet, try to change the name of constructor from MsDotNetHeaven to MsDotNetMentor and see whats happen, you have to put same name as you gave it to class.

Behind the scenes:

What happened behind the scenes : whenever you try to create an object of class or initialize a class, then the default constructor is invoked.

//Initializes the Class
MsDotNetHeaven objMsDnH = new MsDotNetHeaven();

Types of Constructor

This is a n issue of debate but I always like to segregated Constructors in following types:

1. Default Constructor

A constructor that takes no parameters is called a default constructor. Default constructors are invoked whenever an object is instantiated by using the new operator and no arguments are provided to new.


2. Parameterized Constructor

Besides a default constructor when its need to pass some argument on the initialization of a class a parameterized constructor is come to picture. It follows the same rules as default constructor with a difference that it has some parameters which also differentiate it from default constructor. Go through following snippet:




public class MsDotNetHeaven
{
public MsDotNetHeaven()
{
//A default Constructor
}

public MsDotNetHeaven(String strName)
{
//A parameterized Constructor having one parameter
}

public MsDotNetHeaven(String strFirstName, String strLastName)
{
//A parameterized Constructor having two parameters
}


//Class members

}




Note:
1. A default constructor should be explicitly declared while declaring parameterized constructor.

2. Some writer also take Private constructor and Static Constructor as types of constructor but in my view these are constructor with different modifiers so behave differ; I will cover these in next section.

Access Modifiers and Prefix with Constructors

By default Constructors are public but we can also use other modifiers and prefix like private and static. With the use of these modifiers constructors behave differently:

Using Access Modifier private with Constructor

When put private as access modifier to constructor then that constructor is known as private Constructor

A private constructor is a special instance constructor. It is commonly used in classes that contain static members only. If a class has one or more private constructors and no public constructors, then other classes (except nested classes) are not allowed to create instances of this class.

Some time there is a need where we have not allow outer world to get instantiate our class then we need to use private modifier with constructor. Consider following piece of code:

public class MsDotNetHeaven
{
private MsDotNetHeaven()
{
//A default Constructor as private
}

//Class members

}

Now, whenever you try to invoke following piece of code:

//Initializes the Class
MsDotNetHeaven objMsDnH = new MsDotNetHeaven();

it throws an error: Constructors. MsDotNetHeaven. MsDotNetHeaven ()' is inaccessible due to its protection level

Now, question comes to mind if the above contains error then what the use is of private constructor, we can make above class to be initialized by declaring another public constructor, modify above code-snippet with bellow one:

public class MsDotNetHeaven
{
private MsDotNetHeaven()
{
//A default Constructor as private
}
public MsDotNetHeaven(String strName): this()
{
//A parameterized Constructor having one parameter
System.Console.WriteLine(“My name is : “ + strName);
}

//Class members
}

Now, you can initialize class as follow:

//Initializes the Class
MsDotNetHeaven objMsDnH = new MsDotNetHeaven(“Gaurav Arora”);

Using prefix static with Constructor

With the use of static with constructor gives a name as static constructor

For C++ developers it’s a new concept introduced in C#.

A static constructor is used to initialize any static data, or to perform a particular action that needs performed once only. It is called automatically before the first instance is created or any static members are referenced.
Consider the following:

public class MsDotNetHeaven
{
static MsDotNetHeaven()
{
//A static Constructor
// Can only access static members here.

System.Console.WriteLine("I am a static constructor.");
}

//Class members

}

Now whenever you create an instance of the class MsDotNetHeaven the line I am a static constructor get printed.

Consider following piece of code:

public class MsDotNetHeaven
{
static MsDotNetHeaven()
{
//A static Constructor
// Can only access static members here.

System.Console.WriteLine("I am a static constructor.");
}

public MsDotNetHeaven()
{
//A default Constructor
}

//Class members

}

Above code is perfectly alright and will perform same result as earlier code.

Calling Parent Class Constructors in child class during inheritance

Now, suppose a scenario when you are inheriting a class and want to use Parent class constructor then how to attain that.

Simple the same has been achieved by using base()
Consider following code-snippet

public class MsDotNetHeaven
{
public MsDotNetHeaven()
{
//A default Constructor
}

public MsDotNetHeaven(String strName)
{
//A parameterized Constructor having one parameter
}

//Class members

}

public class MsDotNetMentor : MsDotNetHeaven
{
public MsDotNetMentor ()
{
//A default Constructor
}

public MsDotNetMentor (String strName) : base(strName)
{
//A parameterized Constructor having one parameter
}

//Class members

static void Main()
{
MsDotNetMentor objMsDnM = new MsDotNetMentor(); //(A)
MsDotNetMentor objNameMsDnM = new MsDotNetMentor(“Gaurav Arora”); //(B)
}


}

(A) From above : the sequence of invoking a constructor is first public MsDotNetHeaven() and then public MsDotNetMentor()
(B) From above : the sequence of invoking a constructor is public MsDotNetHeaven(String strName)and then public MsDotNetMentor(String strName)

Note:

1. A static constructor should not be declared with any access modifier.


2. A static constructor does not accept parameters


3. A static constructor is called automatically.


4. There is no way to call a static constructor directly.


5. Can’t stop the execution of Static constructor

Due to the scope of this article it might be possible that something I forgot please remind me if any :

Important :

1. Constructor is nothing but a special method, which initializes the class or its task to initialize the object of it class.


2. Its name must be same as the name of class


3. This is a special method as constructors do not have return types, not even void


4. Constructor cannot return any value because they didn’t have any return type.


5. Constructor can’t be get inherited, although a derived class can class the base class constructor.


6. A class has atleast one constructor also known as default constructor [a constructor without parameter]


7. You have to explicitly write a default constructor while Overloading constructors.


8. Concept declaring multiple constructors of a class with different sets of parameters known as Constructor overloading.


9. A constructor can be called another constructor using this()

LINQ Querry : A Step Ahead Series

LINQ Querry : A Step Ahead Series
History:
The article is related to previous posts :

1. Anonymous Types in LINQ: A Step Ahead Series

2. How to Test Anonymous Type Equality - LINQ: A Step Ahead Series

Introduction:

LINQ - Language Integreted Query is repeadily used in these days. The presented article is elaborate the idea "How to describe a LINQ Query".

Simply, a query is an expression that retrieves data from a data source.

Scope:
The scope of the presented article is upto its title and projected scenarios.

• Basics


• LINQ Actions


• Some basic example


• Creating a LINQ project using Visual Studio

Description:

Now lets elaborate the topic in following points:

1. Operation of LINQ Query:

LINQ query consists three distinct actions as defined bellow:

(a) In this step LINQ gather the DataSource it may be any source of data.
(b) In next step have to create the Query
(c) Finally, execute the Query.

Lest, go through the following code-lines and try to understand the above operations:

class LINQQuery
{
static void Main()
{

// This is the Data source - Operation - I
int[] numbers = new int[7] { 0, 1, 2, 3, 4, 5, 6 };

// Query Creation - Operation - II
var numQuery =
from num in numbers
where (num % 2) == 0
select num;

// Query Execution - Operation - III
foreach (int num in numQuery)
{
Console.Write("{0,1} ", num);
}
}
}

Three actions of LINQ Query [adapted from MSDN - bb397906]


2. Skip and Take:

Skip, SkipWhile, Take, and TakeWhile are used to partition collectionsinto two parts and then return one of the parts. These partition features are only implemented as extension methods.

skip jumps to the indicated argument position in the sequence and returns everything after that.

SkipWhile accepts a predicate and instead of using a position, it skips until the predicate evaluates to false.

Take grabs all of the elements up to the specified position in the index.

TakeWhile grabs all of the items in a sequence as long as the predicate evaluates to true.

3. Create a LINQ Project:

As per MSDN :

To use LINQ to XML or LINQ to DataSet in either C# or VB.Net language, you must manually add namespaces and references as described in the following :

If you are upgrading a project that you created by using an earlier version of Visual Studio, you may have to supply these or other LINQ -related references manually and also manually set the project to target .NET Framework version 3.5.

To target the .NET Framework version 3.5

1. In Visual Studio, open a Visual Basic or C# project that was created in Visual Studio 2005 and follow the prompts to
   
   convert it to a Visual Studio 2008 project.


2. For a C# project, click the Project menu, and then click Properties.


3. In the Application property page, select .NET Framework 3.5 in the Target Framework drop-down list.


4. For a Visual Basic project, click the Project menu, and then click Properties.


5. In the Compile property page, click Advanced Compile Options and then select .NET Framework 3.5 in the Target Framework
   
   (all configurations) drop-down list.

Important Points:

1. LINQ queries start with the keyword from.


2. In a LINQ query, you are always working with objects.


3. You an apply the basic operations to LINQ Query as follow:
   
   
   
   • 
     
     Filtering is the common operation tyhrough which you can filter the data, consider following code:
     
     

     
     //filter all employees on last name as 'Arora'
     var lnqueryNames = from empname in employee
     where empname.lastname == "Arora"
     select empname;
     

     
     
   
   
   Ordering sets the ordering for the output, lets take a loon in the following:
   
   

   
   //display all Arora in ascending order with departments
   var lnqueryNames = from empname in employee
   where empname.lastname == "Arora"
   orderby empname.dept ascending
   select empname;
   

   
   
   
   • 
     Ordering give the output in a group, consider following example:
     
     

     
     
     var lnqueryNames = from empname in employee
     group empname by empname.department;
     
     foreach (var empbydept in lnqueryNames)
     {
     Console.WriteLine(empbydept.Key);
     foreach (Employee emp in empbydept)
     {
     Console.WriteLine(" {0}", emp.lastName);
     }
     }