Question

I have this error specified cast is not valid while trying to do autocomplete for datagridviewtextboxcell.. I have attached a snapshot of the code along with the stack trace. Am i missing something here??

private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
    {
        TextBox prodCode = e.Control as TextBox;
        if (dataGridView1.CurrentCell.ColumnIndex == 0)
        {
            var source = new AutoCompleteStringCollection();
            String[] stringArray = newDB.CustomerTbls.Where(s => s.Status == "Active" & s.Type == "Customer").Select(s => s.Name).ToArray<string>();
            source.AddRange(stringArray);

            if (prodCode != null)
            {
                prodCode.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
                prodCode.AutoCompleteCustomSource = source;
                prodCode.AutoCompleteSource = AutoCompleteSource.CustomSource;

            }
        }
        else
            prodCode.AutoCompleteCustomSource = null;
    }

Answer 1

I figured out the issue myself. The form in which i was trying to do Datagridview Autocomplete was a Child Form. And the code which I posted above was working in a new Form. So i opened the Child Form as a new Thread and tried running the code and it worked!! Thanx for all your help @chridam.