Page.GetPostBackEventReference Method (Control, String)
.NET Framework 2.0
NOTE: This method is now obsolete.
Returns a string that can be used in a client event to cause postback to the server. The reference string is defined by the specified control that handles the postback and a string argument of additional event information. Namespace: System.Web.UIAssembly: System.Web (in system.web.dll)
'Declaration <ObsoleteAttribute("The recommended alternative is ClientScript.GetPostBackEventReference. http://go.microsoft.com/fwlink/?linkid=14202")> _ Public Function GetPostBackEventReference ( _ control As Control, _ argument As String _ ) As String 'Usage Dim instance As Page Dim control As Control Dim argument As String Dim returnValue As String returnValue = instance.GetPostBackEventReference(control, argument)
/** @attribute ObsoleteAttribute("The recommended alternative is ClientScript.GetPostBackEventReference. http://go.microsoft.com/fwlink/?linkid=14202") */
public String GetPostBackEventReference (
Control control,
String argument
)
ObsoleteAttribute("The recommended alternative is ClientScript.GetPostBackEventReference. http://go.microsoft.com/fwlink/?linkid=14202") public function GetPostBackEventReference ( control : Control, argument : String ) : String
Not applicable.
Parameters
- control
The server control to process the postback.
- argument
The parameter passed to the server control.
Return Value
A string that, when treated as script on the client, initiates the postback.This method has been deprecated. Use the GetPostBackEventReference method in the ClientScriptManager class instead.
Public Class MyControl Inherits Control Implements IPostBackEventHandler ' Create an integer property that is displayed when ' the page that contains this control is requested ' and save it to the control's ViewState property. Public Property Number() As Integer Get If Not (ViewState("Number") Is Nothing) Then Return CInt(ViewState("Number")) End If Return 50 End Get Set ViewState("Number") = value End Set End Property ' Implement the RaisePostBackEvent method from the ' IPostBackEventHandler interface. If inc is passed ' to this method, it increases the Number property by one. ' If dec is passed to this method, it decreases the ' Number property by one. Sub RaisePostBackEvent(eventArgument As String) Implements IPostBackEventHandler.RaisePostBackEvent If eventArgument = "inc" Then Number = Number + 1 End If If eventArgument = "dec" Then Number = Number - 1 End If End Sub 'RaisePostBackEvent <System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _ Protected Overrides Sub Render(writer As HtmlTextWriter) ' Converts the Number property to a string and ' writes it to the containing page. writer.Write(("The Number is " + Number.ToString() + " (")) ' Uses the GetPostBackEventReference method to pass ' inc to the RaisePostBackEvent method when the link ' this code creates is clicked. writer.Write(("<a href=""javascript:" + Page.GetPostBackEventReference(Me, "inc") + """>Increase Number</a>")) writer.Write(" or ") ' Uses the GetPostBackEventReference method to pass ' dec to the RaisePostBackEvent method when the link ' this code creates is clicked. writer.Write(("<a href=""javascript:" + Page.GetPostBackEventReference(Me, "dec") + """>Decrease Number</a>")) End Sub 'Render End Class 'MyControl
public class MyControl extends Control implements IPostBackEventHandler
{
// Create an integer property that is displayed when
// the page that contains this control is requested
// and save it to the control's ViewState property.
/** @property
*/
public int get_Number()
{
if (get_ViewState().get_Item("Number") != null) {
return System.Convert.ToInt32(get_ViewState().get_Item("Number"));
}
return 50;
} //get_Number
/** @property
*/
public void set_Number(int value)
{
get_ViewState().set_Item("Number", (Int32)value);
} //set_Number
// Implement the RaisePostBackEvent method from the
// IPostBackEventHandler interface. If 'inc' is passed
// to this method, it increases the Number property by one.
// If 'dec' is passed to this method, it decreases the
// Number property by one.
public void RaisePostBackEvent(String eventArgument)
{
if (eventArgument.Equals("inc")) {
set_Number(get_Number() + 1);
}
if (eventArgument.Equals("dec")) {
set_Number(get_Number() - 1);
}
} //RaisePostBackEvent
protected void Render(HtmlTextWriter writer)
{
// Converts the Number property to a string and
// writes it to the containing page.
writer.Write("The Number is " + ((Int32)get_Number()).ToString()
+ " (");
// Uses the GetPostBackEventReference method to pass
// 'inc' to the RaisePostBackEvent method when the link
// this code creates is clicked.
writer.Write("<a href=\"javascript:" + get_Page().
GetPostBackEventReference(this, "inc")
+ "\">Increase Number</a>");
writer.Write(" or ");
// Uses the GetPostBackEventReference method to pass
// 'dec' to the RaisePostBackEvent method when the link
// this code creates is clicked.
writer.Write("<a href=\"javascript:" + get_Page().
GetPostBackEventReference(this, "dec")
+ "\">Decrease Number</a>");
} //Render
} //MyControl
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