We have been getting this exception more and more frequently lately - there seems to be a problem with drop down list selection code somewhere?

 

 

<p class="MsoNormal" style="margin: 0in 0in 0pt"><span style="font-family: &quot;Times New Roman&quot;,&quot;serif&quot;; font-size: 12pt">System.Web.HttpUnhandledException: Exception of type 'System.Web.HttpUnhandledException' was thrown. ---> System.Web.HttpException: Cannot have multiple items selected in a DropDownList. at System.Web.UI.WebControls.DropDownList.VerifyMultiSelect() at System.Web.UI.WebControls.ListControl.RenderContents(HtmlTextWriter writer) at System.Web.UI.WebControls.WebControl.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at ASP.controls_daterange_ascx.__Render__control1(HtmlTextWriter __w, Control parameterContainer) in c:\WINNT\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\e2fe4552\93caa8cd\App_Web_nfefyk6a.10.cs:line 0 at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at ASP.admin_master.__Renderform1(HtmlTextWriter __w, Control parameterContainer) in c:\Inetpub\silverandgoldshop\Admin.master:line 37 at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlContainerControl.Render(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) at System.Web.UI.Adapters.ControlAdapter.Render(HtmlTextWriter writer) at FormRewriterControlAdapter.Render(HtmlTextWriter writer) in c:\Inetpub\silverandgoldshop\App_Code\FormRewriterControlAdapter.cs:line 18 at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Control.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) at System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) at System.Web.UI.Page.Render(HtmlTextWriter writer) at System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) at System.Web.UI.Control.RenderControl(HtmlTextWriter writer) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) --- End of inner exception stack trace --- at System.Web.UI.Page.HandleError(Exception e) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) at System.Web.UI.Page.ProcessRequest() at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) at System.Web.UI.Page.ProcessRequest(HttpContext context) at ASP.admin_order_orders_aspx.ProcessRequest(HttpContext context) in c:\WINNT\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\root\e2fe4552\93caa8cd\App_Web_titat37j.4.cs:line 0 at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) <o:p></o:p></span>

Did you have any customization? Which page is having the exception?

Nothing is customized on that page. It's when we click the Admin/Order/Orders.aspx link. The funny thing is that it will be messed up for hours, then all of the sudden start working again...the exception above is what is logged.

Is Admin/Order/Orders.aspx the only page that is broken?

It appears so, yes, other than our other problem of intermittent email problems and gift certificates not working.

Gift certificate is due to either configuration issue or user error. Please refer to another thread to follow up the solution.

 

For this order page issue I have never seen it before. Which browser are you guys using IE8 or FireFox 3?

We use both browsers.