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What property of the control can determine whether it can recieve a user focus ?

Posted By :Shashi Ray     Posted Date :September 08, 2008    Points :10   Category :C# 
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You can also find related Interview Question to What property of the control can determine whether it can recieve a user focus ?  below: 

What is a user control?

  
An ASP.NET user control is a group of one or more server controls or static HTML elements that encapsulate a piece of functionality. A user control could simply be an extension of the functionality of an existing server control(s) (such as an image control that can be rotated or a calendar control that stores the date in a text box). Or, it could consist of several elements that work and interact together to get a job done (such as several controls grouped together that gather information about a user's previous work experience). (More...)

What is different between Web User Control and in Web Custom Control?

  
Web user controls : Web User Control is Easier to create and another thing is that its support is limited for users who use a visual design tool one gud thing is that its contains static layout one more thing a seprate copy is required for each application.

Web custom controls: Web Custom Control is typical to create and gud for dynamic layout and another thing is it have full tool support for user and a single copy of control is required because it is placed in Global Assembly cache. (More...)

Which property needs to be set for script manager control to extend the time before throwing time out expection if no response is received from the server?

  
AsyncPostBackTimeout Property needs to set which gets or sets a value that indicates the time, in seconds, before asynchronous postback time out if no response is received from the server.




The default value of this property is 90 second. We can also set the user defined error message using asyncpostbackerrormessage property (as shown in above code) for time out. (More...)

Difference Between User Control and Custom Control In Asp.Net?

  
User Controls: We need to implement with Predefined Functionality with Available Properties

Web User Controls:Web User Controls Implements Customized Properties and Customized Methods,we can develop any control with User defined Properties








(More...)

How to use a user control in a Web Forms page

  
Declare the @ Register directive.

For example, use the following code.
<%@ Register TagPrefix="UC" TagName="TestControl" Src="test.ascx" %>
(More...)

How to create an instance of a user control programmatically in the code behind file of a Web Forms page

  
Create a new Web Forms page in Visual Studio.
Navigate to the code behind file generated for this Web Forms page.
In the Page_Load event of the Page class, write the following code.
// Load the control by calling LoadControl on the page class.
Control c1 = LoadControl("test.ascx");

// Add the loaded control in the page controls collection.
Page.Controls.Add(c1);

(More...)

How a user control is processed

  
When a page with a user control is requested, the following occurs:

1)The page parser parses the .ascx file specified in the Src attribute in the @ Register directive and generates a class that derives from the System.Web.UI.UserControl class.

2)The parser then dynamically compiles the class into an assembly.
If you are using Visual Studio, then at design time only, Visual Studio creates a code behind file for the user control, and the file is precompiled by the designer itself.

3)Finally, the class for the user control, which is generated through the process of dynamic code generation and compilation, includes the code for the code behind file (.ascx.cs) as well as the code written inside the .ascx file.
(More...)

What are Events fired for User Control in ASP.NET ?

  
The Sequence of User controls Execution as follows.

OnInit of the user control
OnInit of the containing page
OnLoad of the containing page
OnLoad of the user control (More...)

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