Cant able to clear filter value in GridViewDateTimeColumn

[Vino]

HI,
 
    I am not able to clear filter value in GridViewDateTimeColumn while pressing delete key or backspace key. Instead of clear  it resets to default date. Whether can we set any key down event explicitly in that DateTimePIcker or was there any other way to clear filter value when press delete key.

[Stefan]

Hello Vino,

Thank you for writing.

When you press the Delete or Backspace key while the editor is opened, the selected element (year, month, day) will fall back to its minimum. You can clear the editor by handling the KeyDown event of the editor element and using the SetToNullValue method of the element:

void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    RadDateTimeEditor editor = e.ActiveEditor as RadDateTimeEditor;
    if (editor != null)
    {
        RadDateTimeEditorElement el = (RadDateTimeEditorElement)editor.EditorElement;
        el.KeyDown -= el_KeyDown;
        el.KeyDown += el_KeyDown;
    }
}

void el_KeyDown(object sender, KeyEventArgs e)
{
    if (e.KeyData == Keys.Delete || e.KeyData == Keys.Back)
    {
        e.Handled = true;
        RadDateTimeEditorElement el = (RadDateTimeEditorElement)sender;
        el.SetToNullValue();
    }
}

I hope that you find this information useful.
 
All the best,
Stefan
the Telerik team

[Vino]

Thanks Stefan,

        For Backspace key it wont work. I changed the code little bit and Its working fine.

[Stefan]

Hi Vino,

Sorry for the confusion- I mixed up the events, you should use the KeyUp event instead. Here is the code snippet so the community can benefit from it:

void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    RadDateTimeEditor editor = e.ActiveEditor as RadDateTimeEditor;
    if (editor != null)
    {
        RadDateTimeEditorElement el = (RadDateTimeEditorElement)editor.EditorElement;
        el.KeyUp -= el_KeyUp;
        el.KeyUp += el_KeyUp;
    }
}

void el_KeyUp(object sender, KeyEventArgs e)
{
    if (e.KeyData == Keys.Delete || e.KeyData == Keys.Back)
    {
        e.Handled = true;
        RadDateTimeEditorElement el = (RadDateTimeEditorElement)sender;
        el.SetToNullValue();
    }
}

All the best,

Stefan
the Telerik team