Unable to cast object of type 'System.String' to type 'EO.Web.ElementStyle'.

I upgraded from Aspxlabs with the new control set and ran into this (new) problem. It happens when I try to run this line of code:

Page.ClientScript.RegisterClientScriptBlock(Page.GetType(), "Script", "window.open('../inventory/orders/" + filename + "');", true);


The original error was I was rendering tables into a PDF using tablename.RenderControl, I originally override the render method and all is good.

This page worked fine using the AspxLab tabstrip, but seems broken beyond repair using the EO, everything else in the page works. I also use 3 different callback panels in the page and I think one of my tables is inside the callback panel.

The issue yesterday was new code I was writing, this is old code and worked beutifully forever with the AspxLabs code until now when I upgraded to EO. I've got a dozen pages with this problem, so do I need to reinstall the old version and undo the upgrade process? The solution you gave to yesterday's problem would not be relevant to this as I call this code from a button click.

Would it matter that I am using:

Build 2007.1.32 ?

Here is the stack trace, and it's not "feel", it's fact it worked previously and now it doesn't after I upgraded.

Current Time: 10/23/2007 11:50:14 AM
SHOCKER
Exception of type 'System.Web.HttpUnhandledException' was thrown.
System.InvalidOperationException: RegisterForEventValidation can only be called during Render(); at System.Web.UI.ClientScriptManager.RegisterForEventValidation(String uniqueId, String argument) at System.Web.UI.WebControls.CheckBox.RenderInputTag(HtmlTextWriter writer, String clientID, String onClick) at System.Web.UI.WebControls.CheckBox.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.HtmlControls.HtmlContainerControl.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.HtmlControls.HtmlTableRow.RenderChildren(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlContainerControl.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.HtmlControls.HtmlTable.RenderChildren(HtmlTextWriter writer) at System.Web.UI.HtmlControls.HtmlContainerControl.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 Damage_Claims_view_claim.print_wo_Click(Object sender, EventArgs e) in d:\Websites\SSI_WEB\Damage_Claims\view_claim.aspx.cs:line 552 at System.Web.UI.WebControls.Button.OnClick(EventArgs e) at System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) at System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) at System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)


OR

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[InvalidCastException: Unable to cast object of type 'System.String' to type 'EO.Web.ElementStyle'.]
EO.Web.WebControl.PreRenderStyle(h bag, Int32 field, String overrides) +165
EO.Web.WebControl.PreRenderStyle(h bag, Int32 field) +35
EO.Web.Calendar.a(Int32 A_0) +46
EO.Web.Calendar.b(EventArgs A_0) +331
EO.Web.Calendar.a(EventArgs A_0) +29
System.Web.UI.Control.PreRenderRecursiveInternal() +77
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Control.PreRenderRecursiveInternal() +161
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1360

I completely understand where the error is now, but the first error is the error prior to me making some modifications to the page. The second error is after those modifications. (I moved the override statement above the buttonclick statement?)

Neither is rending ANY eo controls, but rather both are rendering INSIDE eo controls (pageview). I know it's generally speaking not the greatest method but the alternative was not pretty (timewise), and it worked beutifully using the AspxLab tabstrip.

So - Is my only two alternatives to re-write the 12 pages, or downgrade (at least these pages) to aspxlabs?

I made some changes to all the instances, and am not sure if this is related but occasionally I get this error (I email all errors to myself) 10-20 times at once.

Also, I was getting repeated security validation errors with the controls that I was able to correct by turning off page encryption and eventvalidation. Again, these errors didn't happen under AspxLabs version but do now. The new control set has some REALLY awesome functionality but it just seems the result is rendered differently. I.e. using a Tabstrip with multipage and pageviews, if I click on the 2nd tab and open up another pageview, with a grid inside that is built with a raises server event on the Tabstrip, it will render the page, then fill in the gridview 5-10 seconds later, leaving people to believe the page is done loading when it is not. ? It still works, and I've got 500+ users running the site pretty much constantly so the error to valid use ration is very low - still some annoyances.

Current Time: 10/28/2007 7:56:18 PM
SHOCKER
Virtual Url 9cc2706e-16d5-4bcf-a16b-179addb58c8e not registered.
System.Web.HttpException: Virtual Url 9cc2706e-16d5-4bcf-a16b-179addb58c8e not registered. at EO.Web.Internal.ak.a(cv A_0) at EO.Web.Internal.ak.a(HttpApplication A_0) at EO.Web.Internal.d4.a(HttpContext A_0) at EO.Web.Runtime.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)