Introduction:
In this article we will discuss about creating summaries in gridview,and also how to edit each and every row in gidview.

Main:
GridView is to show a set of records, you can also add some more interesting information, such as summary data.

In first step we need to set ShowFooter=”True”

<asp:GridView ID=”gridsample” runat=”server” DataSourceID=”sourceProducts”
 AllowPaging=”True” OnDataBound=”gridSummary_DataBound” ShowFooter=”True” … >

See this below examble,i created one footer,and i calculated stock price values and
finally i summarised

protected void gridSummary_DataBound(object sender, EventArgs e)
{
    decimal local_valueInStock = 0;

    // The Rows collection includes only the rows that are displayed
    // on the current page (not “virtual” rows).
    foreach (GridViewRow row in gridsample.Rows)
    {
        decimal price = Decimal.Parse(row.Cells[2].Text);
        int unitsInStock = Int32.Parse(row.Cells[3].Text);
        valueInStock += price * unitsInStock;
    }

    // Update the footer.
    GridViewRow footer = gridSummary.FooterRow;

    // Set the first cell to span over the entire row.
    footer.Cells[0].ColumnSpan = 3;
    footer.Cells[0].HorizontalAlign = HorizontalAlign.Center;

    // Remove the unneeded cells.Based on yours cell count,In my grid i have 3 columns
    footer.Cells.RemoveAt(2);
    footer.Cells.RemoveAt(1);

    // Add the text.
    footer.Cells[0].Text = “Total value in stock (on this page): ” +
      local_valueInStock.ToString(“C”);
}

Conclusion:
Now,i hope you understood how to create a summarized footer,
Happy Coding.