Grid not getting binded in VB.NET

Question

I am using vb.net and trying to make edit/delete operation in it.

For that i have written the code to bind the grid, but when i am running the page,

Grid is not shown.

aspx for grid:

<asp:GridView ID="gv" runat="server" CellPadding="4" ForeColor="#333333" 
            GridLines="None" AutoGenerateColumns="False">
            <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
            <Columns>
                <asp:CommandField ShowEditButton="True" />
                <asp:CommandField ShowDeleteButton="True" />
                <asp:BoundField DataField="ExpenceDate" HeaderText="Expence Date" />
                <asp:BoundField DataField="sum(Amount)" HeaderText="Amount" />
            </Columns>
            <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
            <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
            <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
            <EditRowStyle BackColor="#999999" />
            <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
        </asp:GridView>

Code for binding the grid:

 Try
            da = New SqlDataAdapter("select expDate,sum(Amount) from expence_VB where expDate between '" + DateTime.Parse(txtFromDate.Text) + "' and '" + DateTime.Parse(txtToDate.Text) + "' group by ExpDate", con)
            ds = New DataSet()
            da.Fill(ds)
            gv.DataSource = ds.Tables(0)
            gv.DataBind()
        Catch ex As Exception

        End Try

Note:

I have done edit columns and turned off autogenerate fields.

For bound fields i have made DataField same as column name in query which i have written to bind the grid.

Is that any mistake in this?

please help me.

Answer 1

Your mistake at your query select, that query sum(Amount) not give column name. Try this: Change your select query from

da = New SqlDataAdapter("select expDate,sum(Amount) from expence_VB where expDate between '" + DateTime.Parse(txtFromDate.Text) + "' and '" + DateTime.Parse(txtToDate.Text) + "' group by ExpDate", con)

Become

da = New SqlDataAdapter("select expDate,sum(Amount) as SumAmount from expence_VB where expDate between '" + DateTime.Parse(txtFromDate.Text) + "' and '" + DateTime.Parse(txtToDate.Text) + "' group by ExpDate", con)

And then in aspx grid, you can change this code:

<asp:BoundField DataField="sum(Amount)" HeaderText="Amount" />

Become :

<asp:BoundField DataField="SumAmount" HeaderText="Amount" />