ComboBoxEditor on certain cells

[Adam]

I'm building a property-editor style grid with a readonly column with the name of the property and then an editable column to enter data.  Some of the rows have drop-down values where they have their own unique choice of drop-down entries.  I can get the comboBoxEditor to appear with the following code:

private void radGridView1_EditorRequired(object sender, EditorRequiredEventArgs e)

{


    List<string> fixedValues = GetFixedValues();

    if (fixedValues == null) return; //will use a normal textbox editor for items with no fixedValues

  

    RadComboBoxEditor comboEditor = new RadComboBoxEditor();

    (comboEditor.EditorElement as RadComboBoxEditorElement).DataSource = fixedValues;

  

    e.Editor = comboEditor;

    e.EditorType = typeof(RadComboBoxEditor);         

}

but I am having trouble optimizing the use of the combobox for data entry.  The comboBox loses its value as you tab through the cell without changing anything.  Basically I haven't found any way to set the selected index or the value.  I think it has to do with the Items property never being populated, but I can't get it to populate even though the DataSource is set.

Any ideas?

Thanks,
Adam

[Martin Vasilev]

Hello Adam,

Thank you for writing.

Your code seems right, however I think I managed to reproduce described issue: If you are in edit mode and enter into combo editor through tab press, it shows the first item selected, which is wrong provided that the cell value actually is null. This is related to how the bound to the List object RadComboBoxEditor handles its value. You can avoid this by populating the combo items manually instead of using binding. Please consider the following code:
 

RadComboBoxEditor comboEditor = new RadComboBoxEditor();
//(comboEditor.EditorElement as RadComboBoxEditorElement).DataSource = fixedValues;
foreach (string item in fixedValues)
{
    editorElement.Items.Add(new RadComboBoxItem(item));
}

Let me know if this does not help in your case.

Sincerely yours,
Martin Vasilev
the Telerik team

[Adam]

Martin, 

I want to say that I tried doing it that way and experienced exceptions, however, using your code appears to do the trick.  Thanks so much for your help with this!

-Adam

[Martin Vasilev]

Hello Adam,

I am glad that the provided solution does the job in your case. Do not hesitate to contact me again if you have any other questions.

Sincerely yours,
Martin Vasilev
the Telerik team