VirtualGridDropDownListEditor crash on alpha numeric key pressed

[Amand]

Hi,

Aft

After experiencing a crash when pressing any alpha-numeric key on a cell containing a VirtualGridDropDownListEditor, I spotted an error in Telerik source code at file RadGridView\VirtualGrid\Input\VirtualGridInputBehavior.cs (around line 1441) :

protected virtual bool HandleAlphaNumericKey(KeyPressEventArgs keys)
{

    ...

    else if (this.GridElement.ActiveEditor is VirtualGridDropDownListEditor)
    {
        string symbol = keys.KeyChar.ToString();
        RadDropDownListEditor editor = this.GridElement.ActiveEditor as RadDropDownListEditor;
        RadDropDownListEditorElement element = editor.EditorElement as RadDropDownListEditorElement;

        if ((element.AutoCompleteMode & AutoCompleteMode.Append) == AutoCompleteMode.Append)
        {

            ...

 

The editor variable should be cast as VirtualGridDropDownListEditor

Just to let you know for next releases
Sorry if bug has already been spotted and fixed :)

Regards

[Dimitar]

Hi Amand,

Thank you for reporting this.

Indeed this is an issue which I have logged in our Feedback Portal. I have added a vote for it on your behalf as well. You can track its progress, subscribe for status changes and add your comment to it here. I have also updated your Telerik Points.

To workaround this you should create custom behavior:

radVirtualGrid1.VirtualGridElement.InputBehavior = new MyBehavior(radVirtualGrid1.VirtualGridElement);

class MyBehavior : VirtualGridInputBehavior
{
    public MyBehavior(RadVirtualGridElement element) : base(element)
    {

    }
    protected override bool HandleAlphaNumericKey(KeyPressEventArgs keys)
    {
        if (!this.GridElement.IsInEditMode &&
            (this.GridElement.BeginEditMode == RadVirtualGridBeginEditMode.BeginEditOnKeystroke ||
             this.GridElement.BeginEditMode == RadVirtualGridBeginEditMode.BeginEditOnKeystrokeOrF2))
        {
            //this.GridElement.HideContextMenu();
            this.GridElement.BeginEdit();
            if (this.GridElement.ActiveEditor is VirtualGridDropDownListEditor)
            {
                string symbol = keys.KeyChar.ToString();
                var editor = this.GridElement.ActiveEditor as VirtualGridDropDownListEditor;
                var element = editor.EditorElement as RadDropDownListEditorElement;

                if ((element.AutoCompleteMode & AutoCompleteMode.Append) == AutoCompleteMode.Append)
                {
                    int index = element.AutoCompleteAppend.FindShortestString(symbol);

                    if (index == -1)
                    {
                        element.EditableElementText = symbol;
                        element.EditableElement.SelectionStart = 1;
                        element.EditableElement.SelectionLength = 0;

                        return true;
                    }
                }

            }
            return false;
        }

        return base.HandleAlphaNumericKey(keys);
    }
}

Should you have any other questions do not hesitate to ask.

Regards,
Dimitar
Telerik by Progress