DataBinding: 'System.Data.DataRowView' Does Not Contain A Property With The Name 'Component_Profile_ID'

Hi,
Seems like a lot of people are having a similiar problem that I am having right now, but I am not able to find the solution to it. On the Page_load event, the gridview does display the data from database. When I click a button to insert the same data but different Waste_Profile_Num value, it gives me the databinding error. Component_Profile_ID is declared as an Identity and it is the primary key to the table. Anyway help???
Ok, the following are code that I have:  1 <asp:SqlDataSource ID="sqlDSMaterialComposition" runat="server" ConnectionString="<%$ ConnectionStrings:HAZConnectionString %>"
2 SelectCommand="SELECT dbo.Component_Profile.Component_Profile_ID AS Component_Profile_ID, dbo.Component.Component, dbo.Component_Profile.Concentration, dbo.Component_Profile.Range, dbo.Component_Profile.Waste_Profile_Num, dbo.Component.Component_ID FROM dbo.Component INNER JOIN dbo.Component_Profile ON dbo.Component.Component_ID = dbo.Component_Profile.Component_ID WHERE (dbo.Component_Profile.Waste_Profile_Num = @Waste_Profile_Num)">
3 <SelectParameters>
4 <asp:SessionParameter Name="Waste_Profile_Num" SessionField="Waste_Profile_Num" Type="Int32" />
5 </SelectParameters>
6 </asp:SqlDataSource>
7
8
9 <asp:GridView ID="GridViewMaterialComposition"
10 runat="server"
11 DataKeyNames="Component_Profile_ID,Component_ID"
12 AutoGenerateColumns="False" ShowFooter="true">
13 <Columns>
14 <asp:BoundField DataField="Component" HeaderText="Component" SortExpression="Component" FooterText="Total"/>
15 <asp:TemplateField HeaderText="Concentration" FooterStyle-Font-Bold="true">
16 <ItemTemplate>
17 <%# SumConcentration(decimal.Parse(Eval("Concentration").ToString())).tostring("N2") %>
18 </ItemTemplate>
19 <FooterTemplate>
20 <%# GetConcentration().tostring("N2") %>
21 </FooterTemplate>
22 </asp:TemplateField>
23 <asp:BoundField DataField="Range" HeaderText="Range" SortExpression="Range" />
24 <asp:BoundField DataField="Component_Profile_ID" HeaderText="Component_Profile_ID" ReadOnly="True" SortExpression="Component_Profile_ID" Visible="true" />
25 <asp:BoundField DataField="Component_ID" HeaderText="Component_ID" ReadOnly="True" SortExpression="Component_ID" Visible="true"/>
26 <asp:BoundField DataField="Waste_Profile_Num" HeaderText="Waste_Profile_Num" ReadOnly="true" SortExpression="Waste_Profile_Num" Visible="true" />
27 <asp:CommandField ShowEditButton="true" />
28 <asp:TemplateField Visible="false">
29 <ItemTemplate>
30 <asp:Label ID="lblComponentProfileID" runat="Server" Text='<% # Eval("Component_Profile_ID") %>'></asp:Label>
31 <asp:Label ID="lblComponentID" runat="Server" Text='<% # Eval("Component_ID") %>'></asp:Label>
32 </ItemTemplate>
33 </asp:TemplateField>
34 </Columns>
35 </asp:GridView>The following are the code-behind: 1 sqlSelect = "SELECT Range, Concentration, Component_ID FROM Component_Profile WHERE (Component_Profile.Waste_Profile_Num = " & previousWasteProfileNum & ")"
2 sqlDSMaterialComposition.SelectCommand = sqlSelect
3 Try
4 Dim dvComposition As Data.DataView = CType(sqlDSMaterialComposition.Select(DataSourceSelectArguments.Empty), Data.DataView)
5 For Each dr As Data.DataRow In dvComposition.Table.Rows
6 insertSql = "INSERT INTO Component_Profile ([Range], [Concentration], [Component_ID], [Waste_Profile_Num]) "
7 insertSql &= "VALUES (" & dr("Range").ToString.Trim & ", " & dr("Concentration").ToString.Trim & ", " & dr("Component_ID").ToString.Trim & ", " & CInt(Session("Waste_Profile_Num").ToString()) & ")"
8 sqlDSMaterialComposition.InsertCommand = insertSql
9 sqlDSMaterialComposition.Insert()
10 Next
11 Catch ex As Exception
12
13 End Try