grid view image using folder in asp.net

grid view image using folder in asp.net :

aspx :

 <asp:TemplateField HeaderText="Pro-Image">

     <ItemTemplate>

          <asp:Image ID="Image1"

                                --- Folder Name Set

//<%# string.Format("~/{0}",Eval("Image"))%>

                  ImageUrl='<%# string.Format("~/{0}",Eval("Image"))%>'                              Width="150px" Height="100px"   runat="server" />

     </ItemTemplate>

</asp:TemplateField>