DataGrid column Operations

DataTable detects if there is a DataColumn
1.if (dt. Columns.contains ("AA") = = True)
{
Presence of AA
}

2.foreach (DataColumn mdcol in dt. Columns)
{
if (mdcol.columnname== "AA")
{
Presence of AA
}
}

How to remove a DataGrid column
private void OnDataBound (object sender, Web.UI.WebControls.DataGridItemEventArgs e)
{
E.item.cells.remove (E.item.cells[0]);
}
Conditionally formatting a DataGrid cell

private void Ondatagriddatabound (object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if (E.item.itemtype = = ListItemType.Item | |
E.item.itemtype = = ListItemType.AlternatingItem)
{
DataRowView RV = (DataRowView) e.Item.DataItem;
Gets the value of the fourth column
Int32 nunitsinstock = Convert.ToInt32 (rv. ROW.ITEMARRAY[4]);
if (Nunitsinstock < 20)
{
E.ITEM.CELLS[4]. BackColor = color.red;
}
}
}
DataGrid Column Width setting
The column widths in the browse state can be set like this:
Column.ItemStyle.Width = 100;

The column widths in edit state can be set like this:
private void Datagrid1_editcommand (object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
{
DataGridItem line = Dbgcustomers.items[e.item.itemindex];
TextBox tb1 = (textbox) line. Cells[0]. Controls[0];
TextBox TB2 = (textbox) line. CELLS[1]. Controls[0];

Tb1. Width = unit.percentage (100);
TB2. Width = unit.percentage (100);
TB2. TextMode = TextBoxMode.MultiLine;
}