Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentException: Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

Source Error:

Stack Trace:

[ArgumentException: Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.]

   System.Web.UI.ClientScriptManager.ValidateEvent(String uniqueId, String argument) +261

   System.Web.UI.Control.ValidateEvent(String uniqueID, String eventArgument) +83

   System.Web.UI.Control.ValidateEvent(String uniqueID) +34

   System.Web.UI.WebControls.TextBox.LoadPostData(String postDataKey, NameValueCollection postCollection) +39

   System.Web.UI.WebControls.TextBox.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection) +36

   System.Web.UI.Page.ProcessPostData(NameValueCollection postData, Boolean fBeforeLoad) +479

   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2545

Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.42

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="AddNewOfficer.aspx.cs" Inherits="AddNewOfficer" MaintainScrollPositionOnPostback ="true" Debug ="true" MasterPageFile="~/MasterPage.master" %>

    <asp:Content ContentPlaceHolderID="ContentPlaceHolder1" runat="server">

 <script  type="text/javascript"   src="JScript.js">

</script>

    <form >

    <div>

>

>

            <tr>

                <td style="width: 125px; height: 30px;">

                 <asp:Label ID="Label6" runat="server"  Text="Joining Date" Width="90px"></asp:Label>

                </td>

                <td style="width: 250px">

                <asp:TextBox ID="TextJoindate" runat="server" Width="150px"></asp:TextBox>

               <a href="javascript:GetDate('Ctl00_ContentPlaceholderID2_TextJoindate');">

        <img alt="PopUp Calendar" src="../Images/SmallCalendar.gif" style="width: 39px; height: 24px" /></a>

                </td>

    </form>

</asp:Content>

<%--</body>

</html>

--%>

 on Page_load of content page  I have written as followsw

string strJSFile;

        strJSFile = this.ResolveClientUrl("JScript.js");

        Page.ClientScript.RegisterClientScriptInclude(this.GetType(), "mykey", strJSFile);

Though Javascript code is working fine But 

After clicking on the Addbutton first i got the runtime error theForm._SCROLLPOSITIONX is null or not an object or aboove server error is thrown .

Plz tell me the exact way with the example of some source code

SWati Jain

Hi,

why do you need to dynamically include the js file when you are already including it statically(in the head of your master page)?

Anyway, here's how to do it:  http://msdn2.microsoft.com/en-us/library/kx145dw2.aspx

A suggesstion: Using hardcoded id's for your controls is not a very good practice:

You can replace this: <a href="javascript:GetDate('Ctl00_ContentPlaceholderID2_TextJoindate');">

by this: <a href="javascript:GetDate('<%=TextJoindate.ClientID%>');">

Hope this helps.