PostBackOptions.AutoPostBack Property
Gets or sets a value that indicates whether the form will automatically post back to the server in response to a user action.
Assembly: System.Web (in System.Web.dll)
Property Value
Type: System.Booleantrue if the form will automatically post back in response to a user action; otherwise, false. The default value is false.
You can use the AutoPostBack property to indicate that a Web Forms page should automatically post back to the server in response to a user action such as selecting an item from a drop-down list. The JavaScript setTimeout method is used with the _doPostBack method to ensure that the user action completes before the postback occurs.
The following code example shows the client-side script that is generated when the AutoPostBack property and the RequiresJavaScriptProtocol property are both set to true.
Available since 2.0