Control.FindControl Method (String)

 

Searches the current naming container for a server control with the specified id parameter.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)

abstract FindControl : 
        id:string -> Control
override FindControl : 
        id:string -> Control

Parameters

id
Type: System.String

The identifier for the control to be found.

Return Value

Type: System.Web.UI.Control

The specified control, or null if the specified control does not exist.

Use FindControl to access a control from a function in a code-behind page, to access a control that is inside another container, or in other circumstances where the target control is not directly accessible to the caller. This method will find a control only if the control is directly contained by the specified container; that is, the method does not search throughout a hierarchy of controls within controls. For information about how to find a control when you do not know its immediate container, see How to: Access Server Controls by ID.

The following example defines a Button1_Click event handler. When invoked, this handler uses the FindControl method to locate a control with an ID property of TextBox2 on the containing page. If the control is found, its parent is determined using the Parent property and the parent control's ID is written to the page. If TextBox2 is not found, "Control Not Found" is written to the page.

System_CAPS_security Security Note

This example has a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.

No code example is currently available or this language may not be supported.

.NET Framework
Available since 1.1
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