Question

I have a grid view which displays some values. now i have to calculate row wise sum of those values for each row and then display against them.

i tried this code but i am getting error as Input String Was not in Correct Format.

public void gv_RowCreated(Object sender, GridViewRowEventArgs e)
{

    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        int total = Convert.ToInt32(e.Row.Cells[1].Text) + Convert.ToInt32(e.Row.Cells[2].Text) + Convert.ToInt32(e.Row.Cells[3].Text) + Convert.ToInt32(e.Row.Cells[4].Text) + Convert.ToInt32(e.Row.Cells[5].Text) + Convert.ToInt32(e.Row.Cells[6].Text) + Convert.ToInt32(e.Row.Cells[7].Text);

        ((Label)gv.FindControl("Label8")).Text = Convert.ToString(total);

    }
}

Answer 1

Try by setting the following code to Item Template of Label8:

<asp:TemplateField HeaderText="Col8">
                <ItemTemplate>
                    <%# Convert.ToInt32(Eval("col1")) + Convert.ToInt32(Eval("col2")) + ... %>
                </ItemTemplate>
            </asp:TemplateField>
</asp:TemplateField>

Check whether it works fine.