Sir, I am in a ASP.NET Project.

I want your help in finding the error occurred in my program.

I tried my best to find and solve the error. but in vain.

Here the error:-






I later find that the error is in GridView code. Please go through the GridView code and give a solution for this error.

Here the page's html code:-


       
       
                            AutoGenerateRows="False" BackColor="White" BorderColor="#999999"
                    BorderStyle="Solid" BorderWidth="1px" CellPadding="3" ForeColor="Black"
                    GridLines="Vertical" onitemcommand="DetailsView1_ItemCommand"
                oniteminserting="DetailsView1_ItemInserting"  >
           
           
           
               
               
                   
                       
                   
                   
                       
                   
                   
                       
                   
               
               
                   
                       
                   
                   
                       
                   
                   
                       
                   
               
               
           
           
           
           
       


            AllowPaging="True" DataKeyNames="classId" BackColor="White"
        BorderColor="#999999" BorderStyle="Solid" BorderWidth="1px" CellPadding="3"
        ForeColor="Black" GridLines="Vertical" ShowFooter="True"
        onrowcancelingedit="dgvClass_RowCancelingEdit"
        onrowcommand="dgvClass_RowCommand"
        onselectedindexchanging="dgvClass_SelectedIndexChanging">
       
       
       
           
       
       
       
       
       
       
       
        <%#Container.DataItemIndex + 1; %>
       
       
        <%#Eval("className")%>
       
       
       
       
       
           
               
           
        <%#Eval("noOfseats")%>