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• Re: Invalid postback or callback argument.

  I set EnableEventValidation="false", then my page works with my Webcontrol. but I do not think that is a good idea. <%@ Page Language="C#" MasterPageFile="~/Admin/MasterPage_Admin.master" AutoEventWireup="true" CodeFile="CategoryManagement.aspx.cs" Inherits="Admin_CategoryManagement" Title="Untitled Page" EnableEventValidation="false" %>

  Posted to Migrating from ASP.NET 1.x to ASP.NET 2.0 (Forum) by zhouyuheng on 11/17/2005

• Re: Invalid postback or callback argument.

  Aphelion wrote: use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation. How to do this? As someone said before, it is not possible to do it in PreRender and there is no Render event. there is Render event in base class. to use it : Protected Overrides Sub Render(ByVal writer As System.Web.UI.HtmlTextWriter) MyBase.Render(writer) End Sub but, the problem is I do not know how to use RegisterForEventValidation method. where is

  Posted to Migrating from ASP.NET 1.x to ASP.NET 2.0 (Forum) by zhouyuheng on 11/6/2005