Showing Combobox Items on load

[Joshua]

I Have creating my combobox column and then assigned the items after that as this is how my program worked previously and cannot be changed,however when i load the form there is no default item selected in the combo box ,how do i set a default value to always populate the Combo Box with the first item in the list

[Dess | Tech Support Engineer, Principal]

Hello, Joshua,   

The following help article demonstrates a sample approach how to setup properly the GridViewComboBoxColumn: https://docs.telerik.com/devtools/winforms/gridview/columns/column-types/gridviewcomboboxcolumn

It is important to specify the DataSource collection event though the collection may be filled in the Load event of the form for example. In addition, in the CellEditorInitialized you can specify the DataSource as well. However, in order to store the editor's value after exiting edit mode, the selected item has to valid and present in the applied GridViewComboBoxColumn.DataSource collection:

private void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    RadDropDownListEditor ddl = e.ActiveEditor as RadDropDownListEditor;
    if (ddl != null)
    {
        RadDropDownListEditorElement el = ddl.EditorElement as RadDropDownListEditorElement;
        el.DataSource = this.productsBindingSource;
        el.DisplayMember = "ProductName";
        el.ValueMember = "ProductID";
    }
}

If you have any further questions I would kindly ask you to submit a support ticket. Thnak you for your understanding.

I hope this information helps.

Regards,
Dess
Progress Telerik