Question

I have added TextBox control inside the grid: I want my DataGridView TextBox column to hold numbers without any decimal values. How can I do it?

Answer 1

From: http://social.msdn.microsoft.com/forums/en-US/winformsdatacontrols/thread/919b059c-dba9-40d2-bac7-608a9b120336

You can handle the DataGridView.EditingControlShowing event to cast
the editing control to TextBox when editing in the column you want to
restrict input on, and attach KeyPress event to the TextBox, in the
KeyPress event handler function, we can call the char.IsNumber()
method to restrict the key board input, something like this:

private void Form1_Load(object sender, EventArgs e)
{
   DataTable dt = new DataTable();
   dt.Columns.Add("c1", typeof(int));
   dt.Columns.Add("c2");
   for (int j = 0; j < 10; j++)
   {
      dt.Rows.Add(j, "aaa" + j.ToString());
   }

   this.dataGridView1.DataSource = dt;
   this.dataGridView1.EditingControlShowing +=
      new DataGridViewEditingControlShowingEventHandler(
         dataGridView1_EditingControlShowing);
}

private bool IsHandleAdded;

void dataGridView1_EditingControlShowing(object sender,
    DataGridViewEditingControlShowingEventArgs e)
{
   if (!IsHandleAdded &&
       this.dataGridView1.CurrentCell.ColumnIndex == 0)
   {
      TextBox tx = e.Control as TextBox;
      if (tx != null)
      {
         tx.KeyPress += new KeyPressEventHandler(tx_KeyPress);
         this.IsHandleAdded = true;
      }
   }
}

void tx_KeyPress(object sender, KeyPressEventArgs e)
{
   if (!(char.IsNumber(e.KeyChar) || e.KeyChar == '\b'))
   {
      e.Handled = true;
   }
}