Using Response.Redirect in ASP.NET Ajax Update Panel

Error: Sys.WebForms.PageRequestManagerParserErrorException:

The message received from the server could not be parsed.

Common causes for this error are when the response is modified by calls to Response.Write(),

response filters, HttpModules, or server trace is enabled. Solution 1

private void RedirectTo(string url)

{

string redirectURL = Page.ResolveClientUrl(url)

string script = "window.location = '" + redirectURL + "';";

ScriptManager.RegisterStartupScript(this, typeof(Page), "RedirectTo", script, true);

}

Solution2

<httpModules>

<add name="ScriptModule" type="System.Web.Handlers.ScriptModule,

System.Web.Extensions, Version=1.0.61025.0, Culture=neutral,

PublicKeyToken=31bf3856ad364e35"/>

httpModules> Solution3 Add this in web.config file enableEventValidation="false"