LoadPostData Method
Collapse the table of content
Expand the table of content

IPostBackDataHandler.LoadPostData Method (String, NameValueCollection)


When implemented by a class, processes postback data for an ASP.NET server control.

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

Function LoadPostData (
	postDataKey As String,
	postCollection As NameValueCollection
) As Boolean


Type: System.String

The key identifier for the control.

Type: System.Collections.Specialized.NameValueCollection

The collection of all incoming name values.

Return Value

Type: System.Boolean

true if the server control's state changes as a result of the postback; otherwise, false.

The ASP.NET page framework tracks all the server controls that return true to this method call, and then invokes the RaisePostDataChangedEvent method on those controls.

The following code example demonstrates a server control that implements a version of the LoadPostData method.

Public Overridable Function LoadPostData(postDataKey As String, _
   postCollection As NameValueCollection) As Boolean

    Dim presentValue As String = Text
    Dim postedValue As String = postCollection(postDataKey)

    If (presentValue Is Nothing) OrElse (Not presentValue.Equals(postedValue)) Then 
        Text = postedValue
        Return True
    End If
    Return False
End Function

.NET Framework
Available since 1.1
Return to top
© 2016 Microsoft