DropDown list with gridview

See more:

C#

ASP.NET

I have created a gridview and used one dropdown and a boundcolumn and bind gridview and dropdownlist by sqldatasource.
When I am excuting program then result display in simple column there are not showing dropdownlist I am unable to know.

Please suggest me

my code is...

<asp:GridView ID="grd1" runat="server" DataSourceID="SqlDataSource1"
            AutoGenerateColumns="False" DataKeyNames="Product_Id">
            <Columns>
                <asp:TemplateField HeaderText="Product_Name" SortExpression="Product_Name">
                    <EditItemTemplate>
                        <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSource2"
                            DataTextField="Product_Name" DataValueField="Product_Id" SelectedValue='<%# Bind("Product_Name") %>'>
                        </asp:DropDownList>
                    </EditItemTemplate>
                    <ItemTemplate>
                        <asp:Label ID="Label1" runat="server" Text='<%# Bind("Product_Name") %>'></asp:Label>
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField DataField="Product_Rate" SortExpression="Product_Rate" HeaderText="Product_Rate"/>
            </Columns>
        </asp:GridView>
        <asp:SqlDataSource ID="SqlDataSource1" runat="server"
            ConnectionString="<%$ ConnectionStrings:chalk_hillConnectionString %>"
            SelectCommand="SELECT [Product_Id],[Product_Name], [Product_Rate]  FROM [Product_Detail]">
        </asp:SqlDataSource>
                <asp:SqlDataSource ID="SqlDataSource2" runat="server"
            ConnectionString="<%$ ConnectionStrings:chalk_hillConnectionString %>"
            SelectCommand="SELECT DISTINCT [Product_Id],[Product_Name] FROM [Product_Detail]">
        </asp:SqlDataSource>