Datagridview textchange event fire two times

Question

I am using bindingsource on my windows form Where user when fill in principal amount according to his installment i calculate his monthly amount .But problem is that when fill the amount my text change event fire two times and second time principal make null . How can i resolve that calculation work perfect .

 private void prol04DataGridView_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
        {
         TextBox tx = e.Control as TextBox;

         DataGridViewTextBoxCell cell = prol04DataGridView.CurrentCell as DataGridViewTextBoxCell;


           if (tx != null && cell.OwningColumn == prol04DataGridView.Columns[5])
             {
              tx.TextChanged -= new EventHandler(tx_TextChanged);
              tx.TextChanged += new EventHandler(tx_TextChanged);
             }

        }

this is my text change event

void tx_TextChanged(object sender, EventArgs e)
    {

   try
     {
       TextBox Principal = (TextBox)sender;
       Prol04 _ded = (Prol04)prol04BindingSource.Current;
       /* Here P is PrinciplAmount*/
       P = Convert.ToDecimal(Principal.Text);
       Installment = Convert.ToDecimal(prol04DataGridView.CurrentRow.Cells[6].Value);
       mnthPay = P / Installment;
       _ded.MonthlyAmount = mnthPay;
       _ded.Instalments =Convert.ToInt32(Installment);
       prol04DataGridView.Refresh();

     }

    catch (Exception ex)
      {
        throw (ex);
     }
}
![Datagrid Where i perform event][1]

no in first function i have control on that where it will work on principal amount cell — Abhishek, Jun 05 '13 at 06:14
@Abhishek I tried your code, its calling the event one time, not two times.... — vikas, Jun 05 '13 at 08:35
i don't know but this is happing here at my code so i change with `prol04DataGridView_CellEndEdit` and i get result that i want . Thanks Vikash — Abhishek, Jun 05 '13 at 08:38

Edward Low · Answer 1 · 2013-06-05T08:10:17.523

0

Try using Datagridvirew.CellValueChanged, to replace the whatever you want to do in tx_TextChanged event.

edited Jun 05 '13 at 08:10

answered Jun 05 '13 at 06:17

Edward Low

1
1

do it in form_load then, or in designer mode – Edward Low Jun 05 '13 at 06:25

Datagridview textchange event fire two times

1 Answers1