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Which controls do not have events?

Posted By :Shashi Ray     Posted Date :December 01, 2009    Points :10   Category :.NET Framework 
Timer control.

You can also find related Interview Question to Which controls do not have events?  below: 

Which class defines different events for controls in C#?

  
The "Control" class defines a number of events that are common to many controls. (More...)

What are server controls?

  
ASP.NET server controls are components that run on the server and encapsulate user-interface and other related functionality. They are used in ASP.NET pages and in ASP.NET code-behind classes. (More...)

What is the difference between login controls and Forms authentication?

  
Login controls are an easy way to implement Forms authentication without having to write any code. For example, the Login control performs the same functions you would normally perform when using the FormsAuthentication class—prompt for user credentials, validate them, and issue the authentication ticket—but with all the functionality wrapped in a control that you can just drag from the Toolbox in Visual Studio. Under the covers, the login control uses the FormsAuthentication class (for example, to issue the authentication ticket) and ASP.NET membership (to validate the user credentials). Naturally, you can still use Forms authentication yourself, and applications you have that currently use it will continue to run. (More...)

How many types of validation controls are provided by ASP.NET ?

  
There are six main types of validation controls:-

RequiredFieldValidator: It checks whether the control have any value. It's used when you want the control should not be empty.

RangeValidator: It checks if the value in validated control is in that specific range.

CompareValidator: It checks that the value in controls should match the value in other control.

RegularExpressionValidator: When we want the control value should match with a specific regular expression.

CustomValidator: It is used to define UserDefined validation.

ValidationSummary: It displays summary of all current validation errors. (More...)

Where is image data loaded into ImageList controls actually stored in the project?

  
Each form has an associated resource file (with a .resx extension) where image data and localized strings are stored.You can see this by clicking the Show All Files icon in the Solution Explorer. (More...)

Does ViewState is responsible for maintaining data across the Page Post Back for Postback controls (like textbox, dropdownlist) and non-postbackcontrols(like label)?

  
It is false. For NonPostback controls it is true but for postback controls, ASP.NET retrieves their values one by one from the HTTP request and copies them to the control values while creating the HTTP response. (More...)

In ASP.NET page framework an automatic way to associate page events and methods is

  
AutoEventWireup attribute of the Page directive is set to true (More...)

What is the difference between login controls and Forms authentication?

  
Forms authentication can be easily implemented using login controls without writing any code.
Login control performs functions like prompting for user credentials, validating them and issuing authentication just as the FormsAuthentication class.
However, all that's needs to be dne is to drag and drop the use control from the tool box to have these checks performed implicitly.
The FormsAuthentication class is used in the background for the authentication ticket and ASP.NET membership is used to validate the user credentials. (More...)

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