GridViewComboBoxColumn throwing input is not in a correct format

[Jason]

We have a grid being dynamically created using the following code:


            RadGridView gv = new RadGridView();
            gv.AutoGenerateColumns = false;            
            gv.ShowColumnFooters = false;
            gv.ShowGroupPanel = false;
            gv.ShowInsertRow = true;
            gv.AddingNewDataItem += new EventHandler<Telerik.Windows.Controls.GridView.GridViewAddingNewEventArgs>(gv_AddingNewDataItem);

            GridViewDataColumn col = new GridViewDataColumn();
            col.Header = "Choice";
            col.UniqueName = "Choice";
            col.Width = new GridViewLength(60, GridViewLengthUnitType.Star);
            gv.Columns.Add(col);

            col = new GridViewDataColumn();
            col.Header = "Score";
            col.UniqueName = "Score";
            col.Width = new GridViewLength(10, GridViewLengthUnitType.Star);
            gv.Columns.Add(col);

            GridViewComboBoxColumn comboCol = new GridViewComboBoxColumn();
            comboCol.Header = "AcceptanceCriteria";
            comboCol.UniqueName = "AcceptanceCriteria";
            comboCol.DataMemberBinding = new Binding("AcceptanceCriteria");

            AcceptanceCriteriaTypes aTypes = new AcceptanceCriteriaTypes();
            comboCol.ItemsSource = aTypes;
            comboCol.DisplayMemberPath = "CName";
            comboCol.SelectedValueMemberPath = "CType";
            comboCol.Width = new GridViewLength(30, GridViewLengthUnitType.Star);
            
            gv.Columns.Add(comboCol);

The grid is then bound to our data source object, which is also dynamically created (so I won't post it here, the code won't make any sense)

AcceptanceCriteriaTypes is created through this simple class that creates a selection of possible values in an enum:


    public enum AcceptanceCriteriaEnum
    {
        Favorable,
        Neutral,
        Unfavorable
    }

    public class AcceptanceCriteriaType
    {
        public AcceptanceCriteriaEnum CType { get; set; }
        public string CName { get; set; }
    }

    public class AcceptanceCriteriaTypes : ObservableCollection<AcceptanceCriteriaType>
    {
        public AcceptanceCriteriaTypes()
        {
            Add(new AcceptanceCriteriaType() { CType = AcceptanceCriteriaEnum.Favorable, CName = "Favorable" });
            Add(new AcceptanceCriteriaType() { CType = AcceptanceCriteriaEnum.Neutral, CName = "Neutral" });
            Add(new AcceptanceCriteriaType() { CType = AcceptanceCriteriaEnum.Unfavorable, CName = "Unfavorable" });
        }
    }


The data object that the ComboBoxColumn is binding to is of type AcceptanceCriteriaEnum, so the data type agrees with the combo box. However, when you choose an item from the combo box, the column throws a "Input is not in a correct format." validation error. I've verified that the bound data types agree, and it isn't our binding throwing the validation error as the source binding validation event isn't being thrown yet - focus is staying inside the cell. We are using RadControls 2010 Q2 SP1. Any help would be appreciated.

[Maya]

Hi Jason,

I have tried to reproduce the issue you specified, but unfortunately I was not able to. I am sending you the sample project I have used for testing the problem. You may take a look at it and in case there is some misunderstanding according to your requirements, please fell free to modify it in the way you want. You may share any further relevant information so that I could provide with a more accurate solution, if the sample project does not help.
 

Sincerely yours,
Maya
the Telerik team

[Martin]

Out of interest you don't need more than one or two lines of code to crash the grid when binding to eNums, let me know and I can provide examples.