Gridview Footer Template value to working

Question

5.00/5 (1 vote)

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Hi,

I am using gridview footer template for displaying sum of salary.

but, when find this control in gridview rowdata bound it's shows some error.

Error :  Object reference not set to an instance of an object.

I want to calculate all the values and display in footer lbltotal lables.

How to do this...?

ASPX Page
---------

ASP.NET

<asp:TemplateField HeaderText="Salary"  ItemStyle-Width="65%">
                                       <ItemTemplate>
                                               <asp:TextBox ID="txtSal" runat="server" ForeColor="Blue"  Width="75%" Text='<%# Eval("Sal") %>' ReadOnly="true" MaxLength="7"></asp:TextBox>
                                       </ItemTemplate>
                                       <FooterTemplate>
                                           <asp:Label ID="LBLTotal" runat="server" ForeColor="Green"></asp:Label>
                                       </FooterTemplate>
                                        <ItemStyle HorizontalAlign="Center"/>
                                   </asp:TemplateField>

ASPX.Vb Code
-------------

VB

Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound

       If e.Row.RowType = DataControlRowType.DataRow Then
           Dim sum As Integer = 0
           For index As Integer = 0 To GridView1.Rows.Count - 1
               If CStr(Me.GridView1.Rows(index).Cells(12).Text) <> "" Then
                   sum += Convert.ToInt32(Me.GridView1.Rows(index).Cells(12).Text)
               End If
               Dim Tot As Label = DirectCast(GridView1.FindControl("LBLTotal"), Label)
               Tot.Text = sum
           Next

       End If
   End Sub

Posted 21-Dec-11 19:32pm

gani7787

Updated 21-Dec-11 19:33pm

Wendelius

v2

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Wendelius 22-Dec-11 1:34am

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Monjurul Habib · Accepted Answer · 2011-12-21T19:40:00

Solution 1

you need to use

VB

If e.Row.RowType = DataControlRowType.Footer Then
//your code here
End If

For more detail follow the link:
Running Total In Gridview Footer in ASP.NET C# VB.NET

Posted 21-Dec-11 19:40pm

Monjurul Habib