Loop through gridview getting error - sql

Question

I have a gridview that I am trying to loop through to get the values to update and store in my database. Gridview code:
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AutoGenerateColumns="False"
Width="1020px" EnableTheming="True" PageSize="25" CellPadding="4"
ForeColor="#333333" >
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<Columns>
<asp:BoundField DataField="Column1" HeaderText="Col1" ReadOnly="True" >
<ItemStyle Width="35px" />
</asp:BoundField>
<asp:BoundField DataField="Column2" HeaderText="Col2" />
<asp:BoundField DataField="Column3" HeaderText="Col3" />
<asp:BoundField DataField="Column4" HeaderText="Col4" />
<asp:BoundField DataField="Column5" HeaderText="Col5" />
<asp:TemplateField HeaderText="Col6">
<EditItemTemplate>
<asp:Label ID="Label1" runat="server" Text='<%# Bind("Column6") %>'></asp:Label>
</EditItemTemplate>
<ItemTemplate>
<asp:Label ID="Label2" runat="server" Text="$"></asp:Label>
<asp:TextBox ID="TextBox1" runat="server" Text='<%# Bind("Column6", "{0:f}") %>' CssClass="boxright"></asp:TextBox>
</ItemTemplate>
<ItemStyle HorizontalAlign="Right" VerticalAlign="Middle" />
</asp:TemplateField>
<asp:BoundField DataField="Column7" ReadOnly="True" >
<ItemStyle Width="35px" />
</asp:BoundField>
</Columns>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#003399" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#003399" Font-Bold="True" ForeColor="White" />
<PagerSettings Mode="NextPreviousFirstLast" />
<PagerStyle BackColor="#003399" ForeColor="White" HorizontalAlign="Left" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
I am using a button click event to trigger the stored sql procedure to update my table as follows...
Protected Sub btnB_Save_Click(sender As Object, e As EventArgs) Handles btnB_Save.Click
Dim gvRow As GridViewRow
Dim str As String = ""
For Each gvRow As GridViewRow In gv_Budgets.Rows
str = ((str + gvRow.Cells(0).Text) + (gvRow.Cells(1).Text) + (gvRow.Cells(2).Text) + (gvRow.Cells(3).Text) + (gvRow.Cells(4).Text) + (gvRow.Cells(6).Text))
Dim dtRow As TextBox = CType(gvRow.FindControl("TextBox1"), TextBox)
Response.Write(dtRow.Text)
dt = dal.ExecuteStoredProc(DAL.dbType.SqlServer, "UpdateData", "#col1", str + gvRow.Cells(0).Text, "#col2", str + gvRow.Cells(1).Text, "#col3", str + gvRow.Cells(2).Text, "#col4", str + gvRow.Cells(3).Text, "#col5", str + gvRow.Cells(4).Text, "#col6", dtRow.Text, "#col7", str + gvRow.Cells(6).Text, "#txt1", Textbox2.Text, "#txt2", Textbox3.Text)
Next
End Sub
However, I keep getting those blue syntax error lines under my "dt(datatable)" expression... Any ideas on how or why this is doing this?

Answer 1

Well the "Variable gvRow hides..." error is happening because you've declared gvRow outside the loop and then redeclared it in the definition of the loop.
Dim gvRow As GridViewRow ' First declaration
Dim str As String = ""
For Each gvRow As GridViewRow In gv_Budgets.Rows ' Skip the "As GridViewRow here
The other error is coming from your expression:
dt = dal.ExecuteStoredProc( ...
I'm assuming (because you don't have it listed) that dt is some global variable of type DataTable somewhere. In this case it looks like your sProc is returning a string and attempting to insert it into a datatable object. Make sure your sProc returns a valid datatable. In the meantime you may try to insert the result into a string just to get things working until you can work that out.