Datagridview textchange event fire两次

Question

我在我的windows窗体上使用bindingsource当用户根据他的分期付款填写本金时，我计算他的每月金额。但问题是，当填写金额时我的文本更改事件触发两次，第二次principal为空。我如何解决完美的计算工作。

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); 
      } 

     } 

这是我的文字改变事件

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] 

Answer 1

尝试使用Datagridvirew.CellValueChanged，更换任何你想在tx_TextChanged事件做。