DataGridView Numeric Only Cell?

Question

I am new to winforms..I am trying to set two column of DataGridView to Numeric Only.. I do not want user to be able to type anything into a cell unless its a natural number

Answer 1

Private Sub DataGridView1_EditingControlShowing(ByVal sender As Object, ByVal e As         System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing
        AddHandler CType(e.Control, TextBox).KeyPress, AddressOf TextBox_keyPress
 End Sub
 Private Sub TextBox_keyPress(ByVal sender As Object, ByVal e As KeyPressEventArgs)
        If Char.IsDigit(CChar(CStr(e.KeyChar))) = False Then e.Handled = True
        If Not (Char.IsDigit(CChar(CStr(e.KeyChar))) Or e.KeyChar = ".") Then e.Handled = True
        If e.KeyChar = " "c Then e.Handled = False
  End Sub

Answer 2

If data type validation is only concern then you can use CellValidating event like this

    private void dataGridView1_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
    {
        //e.FormattedValue  will return current cell value and 
        //e.ColumnIndex & e.RowIndex will rerurn current cell position

        // If you want to validate particular cell data must be numeric then check e.FormattedValue is all numeric 
        // if not then just set  e.Cancel = true and show some message 
        //Like this 

        if (e.ColumnIndex == 1)
        {
            if (!IsNumeric(e.FormattedValue))  // IsNumeric will be your method where you will check for numebrs 
            {
                MessageBox.Show("Enter valid numeric data");
                dataGridView1.CurrentCell.Value = null;
                e.Cancel = true;

            }

        }

    }