Export Image file to Excel in ASP.Net

Ref:

HTML

<asp:Panel runat="server" ID="Panel1">
    <asp:Label Text=" Exporting Image to Excel " runat="server" />
    <br />
    <asp:Image ID="Image2" runat="server" />
</asp:Panel>
<br />
<asp:Button ID="btnExport" runat="server" Text="Export" OnClick="Export" />

C#

protected void Page_Load(object sender, EventArgs e)
{
    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[1] { new DataColumn("Item") });
    dt.Rows.Add(GetUrl("Images/AspForumsLogo.jpg"));
    this.Image2.ImageUrl = dt.Rows[0]["Item"].ToString();
}

protected void Export(object sender, EventArgs e)
{
    Response.ContentType = "application/vnd.ms-excel";
    Response.AddHeader("Content-Disposition", "attachment; filename=test.xls;");
    using (StringWriter stringWrite = new StringWriter())
    {
        HtmlTextWriter htmlWrite = new HtmlTextWriter(stringWrite);
        this.Panel1.RenderControl(htmlWrite);
        string headerTable = @"<Table><tr><td></td></tr></Table>";
        Response.Write(headerTable);
        Response.Write(stringWrite.ToString());
        Response.End();
    }
}

protected string GetUrl(string imagepath)
{
    string[] splits = Request.Url.AbsoluteUri.Split('/');
    string url = string.Empty;
    if (splits.Length >= 2)
    {
        url = splits[0] + "//";
        for (int i = 2; i < splits.Length - 1; i++)
        {
            url += splits[i];
            url += "/";
        }
    }
    return url + imagepath;
}

public override void VerifyRenderingInServerForm(Control control)
{
    /* Verifies that the control is rendered */
}

Screenshot