Display an image from Fileupload control?

      protected void Button1_Click(object sender, EventArgs e)

    {

        if (FileUpload1.HasFile)

        {

            FileUpload1.SaveAs(Server.MapPath("img").ToString() + @"\" + FileUpload1.FileName);

            Image1.ImageUrl = @"~\img\" + FileUpload1.FileName;

        }

    }

<div>

        <asp:FileUpload ID="FileUpload1" runat="server" />

    <asp:Image ID="Image1" runat="server" Height="100px" Width="100px" />

    <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />



    </div>

Thanks & Regards,
Santhi .V