SubTotal and GrandTotal in GridView

In the following lesson, you can learn how to implement a grouping and calculate subtotal for each group and GrandTotal for all groups in ASP.Net GridView.

subtotal and grandtotal in gridview

Database

In this article I have used Microsoft's Pubs database for sample data. You can download it free from the following link.

Download

In reporting and analysis, subtotals and grand totals are essential elements that provide comprehensive insights into aggregated data. A subtotal represents the sum of values within a subgroup, typically grouped by a specific criterion, while a grand total encompasses the sum of all calculations within the entire report.

Calculate the GrandTotal

In the current scenario, we are retrieving data from the STOR table of the PUBS database to determine the subtotal of quantities for each store. By using the appropriate SQL queries and grouping the data by store, we can aggregate the quantities supplied by each individual store, resulting in the corresponding subtotals.

Additionally, we aim to calculate the GrandTotal, which entails summing up the quantities from all stores in the report. This involves performing calculations on the entire dataset retrieved from the STOR table, disregarding any specific subgrouping criteria.

For displaying quantity on each row we insert an ItemTemplate for quantity field.

subtotal and grandtotal

For displaying GrandTotal at the footer, we insert a FooterTemplate at thebottom of the GridView.

 grandtotal footer

And for displaying subtotal , the program dynamically add a new row after each group in the Gridview.

Default.aspx
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> </head> <body> <form id="form1" runat="server"> <div> <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" ShowFooter="true" onrowdatabound="GridView1_RowDataBound" onrowcreated="GridView1_RowCreated"> <Columns> <asp:BoundField DataField="stor_id" HeaderText="stor_id" /> <asp:BoundField DataField="ord_num" HeaderText="ord_num" /> <asp:BoundField DataField="title_id" HeaderText="title_id" /> <asp:TemplateField HeaderText="Quantity" ItemStyle-HorizontalAlign="Right"> <ItemTemplate> <asp:Label ID="lblqty" runat="server" Text='<%# Eval("qty") %>' /> </ItemTemplate> <FooterTemplate> <div style="text-align: right;"> <asp:Label ID="lblTotalqty" runat="server" Font-Bold=true /> </div> </FooterTemplate> </asp:TemplateField> </Columns> </asp:GridView> </div> </form> </body> </html>
C# Source Code
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data.SqlClient; using System.Data; public partial class _Default : System.Web.UI.Page { int qtyTotal = 0; int grQtyTotal = 0; int storid = 0; int rowIndex = 1; protected void Page_Load(object sender, EventArgs e) { SqlDataAdapter adapter = new SqlDataAdapter(); DataSet ds = new DataSet(); int i = 0; string sql = null; string connetionString = "Data Source=.;Initial Catalog=pubs;User ID=sa;Password=*****"; sql = "select distinct top 14 stor_id,ord_num,title_id,qty from sales group by stor_id,ord_num,title_id,qty"; SqlConnection connection = new SqlConnection(connetionString); connection.Open(); SqlCommand command = new SqlCommand(sql, connection); adapter.SelectCommand = command; adapter.Fill(ds); adapter.Dispose(); command.Dispose(); connection.Close(); GridView1.DataSource = ds.Tables[0]; GridView1.DataBind(); } protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e) { if (e.Row.RowType == DataControlRowType.DataRow) { storid = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "stor_id").ToString()); int tmpTotal = Convert.ToInt32 (DataBinder.Eval(e.Row.DataItem, "qty").ToString()); qtyTotal += tmpTotal; grQtyTotal += tmpTotal; } if (e.Row.RowType == DataControlRowType.Footer) { Label lblTotalqty = (Label)e.Row.FindControl("lblTotalqty"); lblTotalqty.Text = grQtyTotal.ToString(); } } protected void GridView1_RowCreated(object sender, GridViewRowEventArgs e) { bool newRow = false; if ((storid > 0) && (DataBinder.Eval(e.Row.DataItem, "stor_id") != null)) { if (storid != Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "stor_id").ToString())) newRow = true; } if ((storid > 0) && (DataBinder.Eval(e.Row.DataItem, "stor_id") == null)) { newRow = true; rowIndex = 0; } if (newRow) { GridView GridView1 = (GridView)sender; GridViewRow NewTotalRow = new GridViewRow(0, 0, DataControlRowType.DataRow, DataControlRowState.Insert); NewTotalRow.Font.Bold = true; NewTotalRow.BackColor = System.Drawing.Color.Gray; NewTotalRow.ForeColor = System.Drawing.Color.White ; TableCell HeaderCell = new TableCell(); HeaderCell.Text = "Sub Total"; HeaderCell.HorizontalAlign = HorizontalAlign.Left; HeaderCell.ColumnSpan = 3; NewTotalRow.Cells.Add(HeaderCell); HeaderCell = new TableCell(); HeaderCell.HorizontalAlign = HorizontalAlign.Right; HeaderCell.Text = qtyTotal.ToString(); NewTotalRow.Cells.Add(HeaderCell); GridView1.Controls[0].Controls.AddAt(e.Row.RowIndex + rowIndex, NewTotalRow); rowIndex++; qtyTotal = 0; } } }
VB.Net Source Code
Imports System.Drawing Imports System.Data.SqlClient Imports System.Data Partial Class _Default Inherits System.Web.UI.Page Dim qtyTotal As Integer = 0 Dim grQtyTotal As Integer = 0 Dim storid As Integer = 0 Dim rowIndex As Integer = 1 Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Dim adapter As New SqlDataAdapter() Dim ds As New DataSet() Dim i As Integer = 0 Dim sql As String = Nothing Dim connetionString As String = "Data Source=.;Initial Catalog=pubs;User ID=sa;Password=*****" sql = "select distinct top 14 stor_id,ord_num,title_id,qty from sales group by stor_id,ord_num,title_id,qty" Dim connection As New SqlConnection(connetionString) connection.Open() Dim command As New SqlCommand(sql, connection) adapter.SelectCommand = command adapter.Fill(ds) adapter.Dispose() command.Dispose() connection.Close() GridView1.DataSource = ds.Tables(0) GridView1.DataBind() End Sub Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs) If e.Row.RowType = DataControlRowType.DataRow Then storid = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "stor_id").ToString()) Dim tmpTotal As Integer = Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "qty").ToString()) qtyTotal += tmpTotal grQtyTotal += tmpTotal End If If e.Row.RowType = DataControlRowType.Footer Then Dim lblTotalqty As Label = DirectCast(e.Row.FindControl("lblTotalqty"), Label) lblTotalqty.Text = grQtyTotal.ToString() End If End Sub Protected Sub GridView1_RowCreated(ByVal sender As Object, ByVal e As GridViewRowEventArgs) Dim newRow As Boolean = False If (storid > 0) AndAlso (DataBinder.Eval(e.Row.DataItem, "stor_id") IsNot Nothing) Then If storid <> Convert.ToInt32(DataBinder.Eval(e.Row.DataItem, "stor_id").ToString()) Then newRow = True End If End If If (storid > 0) AndAlso (DataBinder.Eval(e.Row.DataItem, "stor_id") Is Nothing) Then newRow = True rowIndex = 0 End If If newRow Then Dim GridView1 As GridView = DirectCast(sender, GridView) Dim NewTotalRow As New GridViewRow(0, 0, DataControlRowType.DataRow, DataControlRowState.Insert) NewTotalRow.Font.Bold = True NewTotalRow.BackColor = System.Drawing.Color.Gray NewTotalRow.ForeColor = System.Drawing.Color.White Dim HeaderCell As New TableCell() HeaderCell.Text = "Sub Total" HeaderCell.HorizontalAlign = HorizontalAlign.Left HeaderCell.ColumnSpan = 3 NewTotalRow.Cells.Add(HeaderCell) HeaderCell = New TableCell() HeaderCell.HorizontalAlign = HorizontalAlign.Right HeaderCell.Text = qtyTotal.ToString() NewTotalRow.Cells.Add(HeaderCell) GridView1.Controls(0).Controls.AddAt(e.Row.RowIndex + rowIndex, NewTotalRow) rowIndex += 1 qtyTotal = 0 End If End Sub End Class