GridView / FormView binding question

[Bob]

Hi All:
I have a GridView with several pages and a FormView linked via a
ControlParameter. The FormView populates correctly when the user makes
a selection from the first page of the grid. However, when the user
goes to the next page of the grid, the ControlParameter is passing in a
null (or the default value) to the FormView. I want to populate the
formview with the data from the first item of the grid. I've set
GridView1.SelectedIndex in GridView1_PageIndexChanging, but no luck.
Any ideas?

[Muhammad Mosa]

I don't know why this is happening with you but try the following ASP.NET 2.0
script on your aspx page, note that I didn't use any code behind and I'm
using SqlDataSource and the same aspect will work for ObjectDataSource.

<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AutoGenerateColumns="False"
DataKeyNames="ProductID" DataSourceID="SqlDataSource1">
<Columns>
<asp:CommandField ShowSelectButton="True" />
<asp:BoundField DataField="ProductID" HeaderText="ProductID"
InsertVisible="False"
ReadOnly="True" SortExpression="ProductID" />
<asp:BoundField DataField="ProductName"
HeaderText="ProductName" SortExpression="ProductName" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
SelectCommand="SELECT [ProductID], [ProductName] FROM
[Products]"></asp:SqlDataSource>
<asp:FormView ID="FormView1" runat="server" DataKeyNames="ProductID"
DataSourceID="SqlDataSource2">
<EditItemTemplate>
ProductID:
<asp:Label ID="ProductIDLabel1" runat="server" Text='<%#
Eval("ProductID") %>'></asp:Label><br />
ProductName:
<asp:TextBox ID="ProductNameTextBox" runat="server"
Text='<%# Bind("ProductName") %>'>
</asp:TextBox><br />
UnitPrice:
<asp:TextBox ID="UnitPriceTextBox" runat="server" Text='<%#
Bind("UnitPrice") %>'>
</asp:TextBox><br />
UnitsInStock:
<asp:TextBox ID="UnitsInStockTextBox" runat="server"
Text='<%# Bind("UnitsInStock") %>'>
</asp:TextBox><br />
<asp:LinkButton ID="UpdateButton" runat="server"
CausesValidation="True" CommandName="Update"
Text="Update">
</asp:LinkButton>
<asp:LinkButton ID="UpdateCancelButton" runat="server"
CausesValidation="False" CommandName="Cancel"
Text="Cancel">
</asp:LinkButton>
</EditItemTemplate>
<InsertItemTemplate>
ProductName:
<asp:TextBox ID="ProductNameTextBox" runat="server"
Text='<%# Bind("ProductName") %>'>
</asp:TextBox><br />
UnitPrice:
<asp:TextBox ID="UnitPriceTextBox" runat="server" Text='<%#
Bind("UnitPrice") %>'>
</asp:TextBox><br />
UnitsInStock:
<asp:TextBox ID="UnitsInStockTextBox" runat="server"
Text='<%# Bind("UnitsInStock") %>'>
</asp:TextBox><br />
<asp:LinkButton ID="InsertButton" runat="server"
CausesValidation="True" CommandName="Insert"
Text="Insert">
</asp:LinkButton>
<asp:LinkButton ID="InsertCancelButton" runat="server"
CausesValidation="False" CommandName="Cancel"
Text="Cancel">
</asp:LinkButton>
</InsertItemTemplate>
<ItemTemplate>
ProductID:
<asp:Label ID="ProductIDLabel" runat="server" Text='<%#
Eval("ProductID") %>'></asp:Label><br />
ProductName:
<asp:Label ID="ProductNameLabel" runat="server" Text='<%#
Bind("ProductName") %>'>
</asp:Label><br />
UnitPrice:
<asp:Label ID="UnitPriceLabel" runat="server" Text='<%#
Bind("UnitPrice") %>'></asp:Label><br />
UnitsInStock:
<asp:Label ID="UnitsInStockLabel" runat="server" Text='<%#
Bind("UnitsInStock") %>'>
</asp:Label><br />
</ItemTemplate>
</asp:FormView>
<asp:SqlDataSource ID="SqlDataSource2" runat="server"
ConnectionString="<%$ ConnectionStrings:NorthwindConnectionString %>"
SelectCommand="SELECT [ProductID], [ProductName], [UnitPrice],
[UnitsInStock] FROM [Products] WHERE ([ProductID] = @ProductID)">
<SelectParameters>
<asp:ControlParameter ControlID="GridView1" Name="ProductID"
PropertyName="SelectedValue"
Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>

Hope this will help you

[Muhammad Mosa]

Note the behaviour when you select a record and then move to next page.
suppose that you select record number 2, when you move to next page or any
other page, the record number 2 will on the seeked page will be apear as
selected.