private int sum=0;
private void DataGrid1_ItemDataBound(object sender, System.Web.UI.WebControls.DataGridItemEventArgs e)
{
if (e.Item.ItemIndex>=0)
{
sum+=int.Parse(e.Item.Cells[3].Text);
}
else if(e.Item.ItemType==ListItemType.Footer)
{
e.Item.Cells[0].Text="总和为:";
e.Item.Cells[1].Text=sum.ToString();
e.Item.Cells[2].Text="平均值为";
e.Item.Cells[3].Text=((int)(sum/DataGrid1.Items.Count)).ToString();
}
}