ShowDropDown for combo in GridView

[Hasanain]

Hi! Is there any way to simulate the ShowDropDown method of radDropDownList in the DropDownListEditor in the grid? thanks.

[Stefan]

Hello,

Thank you for writing.

Yes, RadGridView has a GridViewComboBoxColumn which cell's default editor is RadDropDownListEditor. More information regarding this column can be found here: http://www.telerik.com/help/winforms/gridview-columns-gridviewcomboboxcolumn.html. 
 
All the best,
Stefan
the Telerik team

[Hasanain]

Thank you Stefan for your answer but I can not find the ” ShowDropDown” method. excuse me!

[Stefan]

Hi Hasanain,

The method to open drop down is in the EditorElement of the RadDropDownListEditor. To use it, a cell must be placed in EditMode and then in the CellEditorInitialized event you will be able to access its RadDropDownListEditorElement and the desired method. Here is a sample where upon button click, I am placing the cell on the second row of a combo column in edit mode and I am opening its drop down:

void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    RadDropDownListEditor editor = this.radGridView1.ActiveEditor as RadDropDownListEditor;
    if (editor != null)
    {

        ((RadDropDownListEditorElement)((RadDropDownListEditor)this.radGridView1.ActiveEditor).EditorElement).ShowPopup();
    }
}

void radButton1_Click(object sender, EventArgs e)
{
    radGridView1.Rows[1].Cells["combo"].BeginEdit();
}

I hope this helps.

All the best,
Stefan
the Telerik team

[Hasanain]

Yes ! but why it's somuch difficult? why the name of the method is different? any way, thank you.

[Stefan]

Hi Hasanain,

I am glad that I could help.

The idea of CellEditorInitialized event is to allow you to have a one central place where you can access and modify the various editors that RadGridView cells use. As to the name of the method, I agree that it should be consistent. Basically, both call the same ShowPopup method of RadDropDownListElement, just the one in RadDropDownList is called ShowDropDown for convenience of the users.
 
Regards,
Stefan
the Telerik team