testbox Validation in specific row in the gridview

问题:

I have a grid view with template columns and in the ItemTemplate i have textbox bounded with sqldatasource, I want make this text box in Row 3 only to type only number and on the other Rows to type normaly any thing ?

回答1:

• In EditingControlShowing, check that if the current cell lies in the desired column.
• Register a new event of KeyPress in EditingControlShowing(if above condition is true).
• Remove any KeyPress event added previously in EditingControlShowing.

• In KeyPress event, check that if key is not digit then cancel the input.

   private void dataGridView1_EditingControlShowing(object sender,     DataGridViewEditingControlShowingEventArgs e)
  {
  e.Control.KeyPress -= new KeyPressEventHandler(Column1_KeyPress);
  if (dataGridView1.CurrentCell.ColumnIndex == 0) //Desired Column
  {
  TextBox tb = e.Control as TextBox;
  if (tb != null)
  {
      tb.KeyPress += new KeyPressEventHandler(Column1_KeyPress);
  }
  }
  }
  
  private void Column1_KeyPress(object sender, KeyPressEventArgs e)
  {
  if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar))
  {
  e.Handled = true;
  }
  }
  

Code Coutesy-Make a specific column only accept numeric value in datagridview in Keypress event