Visual Basic

Public Sub ClearColumn(column As DataGridViewColumn)
    For Each row As DataGridViewRow In column.DataGridView.Rows
        row.Cells(column.Index).Value = Nothing
    Next
End Sub

potected void grid_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
DataRowView drView = (DataRowView)e.Row.DataItem;
DataRow drRow = drView.Row;
 
e.Row.Cells[7].Value = string.empty;
}
}

Dim number as int = int.Parse(textbox1.Text)
Dim result as string = number.ToString("00 - 00 - 00")
'without leading zeros:
Dim result2 as string = number.ToString("## - ## - ##")

MaskTextBox1.Mask = "00 - 00 - 00"
maskedTextBox1.TextMaskFormat = MaskFormat.IncludePromptAndLiterals
string maskedText = maskedTextBox1.Text
'Replace the blank characters
maskedText = maskedText.Replace("_","0")

'Now create a BindingSource for Country ComboBox
Dim CountryBindingSource As New BindingSource(DataSet1, "Country")
'Then create a binding source with CountryBindingSource as the parent using the relation 
Dim RegionBindingSource As New BindingSource(CountryBindingSource, "CountryRegion")
'Now set the DataSource, DisplayMember and ValueMember properties of both the ComboBoxes
comboBox1.DataSource = CountryBindingSource
comboBox1.DisplayMember = "Country"
comboBox1.ValueMember = "CountryID"
comboBox2.DataSource = RegionBindingSource
comboBox2.DisplayMember = "Region"
comboBox2.ValueMember = "RegionID"