GridMaskedColumn error when entering edit mode

[J-F Allard]

Hi, I've some troubles using the GridMaskedColumn from code behind with version 2010.1.309.35.

Here is how I add dynamically my column:

GridMaskedColumn maskColumn = new GridMaskedColumn();
columns.Add(maskColumn);

maskColumn.UniqueName = myDataField;
maskColumn.HeaderText = myHeaderText;

maskColumn.Mask = myMask;
maskColumn.DataField = myDataField;
maskColumn.SortExpression = myDataField;
maskColumn.ShowSortIcon = true;
maskColumn.ShowFilterIcon = true;
maskColumn.ReadOnly = !editable;

I'm using a "aaaa" mask to make sure it's the easiest as possible on a varchar(50) field which has valid values.  I have the same problem when table is empty.

It works great when displayed.  The filters are working correctly with defined mask(while testing something else than 'aaaa') but as soon as I click the edit button, I get an : Cannot create column with the specified type name: GridMaskedColumn

Here is the stack of the error. 

[GridException: Cannot create column with the specified type name: GridMaskedColumn]
   Telerik.Web.UI.GridColumnCollection.CreateColumnFromTypeName(String columnTypeName) +1211
   Telerik.Web.UI.GridColumnCollection.System.Web.UI.IStateManager.LoadViewState(Object savedState) +428
   Telerik.Web.UI.GridTableView.LoadStructureState(Object SavedStructure) +354
   Telerik.Web.UI.RadGrid.LoadTableViewStructure(IEnumerator stateEnumerator, GridTableView tableView) +101
   Telerik.Web.UI.RadGrid.LoadViewState(Object savedStateObject) +276
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +183
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
   System.Web.UI.Page.LoadAllState() +312
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661

I checked and I'm not doing anything special with the column, even not providing mask gives the same error.

Thanks for your help solving this issue.

[Yavor]

Hi J-F Allard,

I reviewed the setup, and the code looks correct. To further trace the issue, however, it will be best if you open a formal support ticket, and send us a small working project, demonstrating your setup, and showing the unwanted behavior. We will review it locally, and get back to you with more information on the matter.

Sincerely yours,
Yavor
the Telerik team

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[DeveloperX]

Was this issue resolved?

[Mira]

Hello Tyrone,

As my colleague Yavor has said, based on the supplied information, we cannot determine what is causing the error. Please make sure that the grid is created according to the Programmatic creation help topic.

If the issue persists, please open a formal support ticket and send us a small working project, demonstrating your full setup and showing the unwanted behavior.
We will debug it locally and get back to you.

Thank you in advance for the cooperation.

Kind regards,
Mira
the Telerik team