Server Error in '/GridViewToEMail' Application.

RegisterForEventValidation can only be called during Render();

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.InvalidOperationException: RegisterForEventValidation can only be called during Render();

Source Error:

Line 63:         StringWriter sw = new StringWriter(sb);
Line 64:         HtmlTextWriter hw = new HtmlTextWriter(sw);
Line 65:         gv.RenderControl(hw);
Line 66:         return sb.ToString();
Line 67:     }

Source File: c:\Documents and Settings\Vamsi\My Documents\GridViewToEMail\Default.aspx.cs Line: 65

Stack Trace:

[InvalidOperationException: RegisterForEventValidation can only be called during Render();]
   System.Web.UI.ClientScriptManager.RegisterForEventValidation(String uniqueId, String argument) +2133492
   System.Web.UI.WebControls.CheckBox.RenderInputTag(HtmlTextWriter writer, String clientID, String onClick) +291
   System.Web.UI.WebControls.CheckBox.Render(HtmlTextWriter writer) +352
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.WebControls.TableCell.RenderContents(HtmlTextWriter writer) +97
   System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +29
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) +7
   System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +29
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.WebControls.Table.RenderContents(HtmlTextWriter writer) +536
   System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) +29
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.WebControls.WebControl.RenderContents(HtmlTextWriter writer) +7
   System.Web.UI.WebControls.GridView.Render(HtmlTextWriter writer, Boolean renderPanel) +202
   System.Web.UI.WebControls.GridView.Render(HtmlTextWriter writer) +30
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   _Default.GridViewToHtml(GridView gv) in c:\Documents and Settings\Vamsi\My Documents\GridViewToEMail\Default.aspx.cs:65
   _Default.ibMail_Click(Object sender, EventArgs e) in c:\Documents and Settings\Vamsi\My Documents\GridViewToEMail\Default.aspx.cs:25
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +105
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +107
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1746

Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433

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Sunday, 17 March 2013

RegisterForEventValidation can only be called during Render();

Server Error in '/GridViewToEMail' Application.

RegisterForEventValidation can only be called during Render();

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