Export ASP.Net Panel with Repeater control Error: Invalid URI: The Uri string is too long

Hi Tevin,

Refer below sample.

HTML

<asp:Panel ID="PanelEmployeeMedicalHistory" CssClass="panel panel-default absolutePrintElement"
    Enabled="true" runat="server">
    <div class="panel-heading" style="text-align: center;">
        Employee Medical History</div>
    <div class="panel-body">
        <div class="form-row">
            <div class="col">
            </div>
            <div class="col">
                <img runat="server" id="ImgLogo" src="http://www.lumotech.co.za/images/img_who-we-are_logo.png"
                    style="width: 200px;" />
            </div>
            <div class="col">
            </div>
        </div>
        <br />
        <div class="form-row">
            <div class="col-3">
            </div>
            <div class="col">
                <asp:Label ID="lblAddress" runat="server" Font-Bold="true" ForeColor="#0099ff" Text="Fitzpatrick St, Cape Road Industrial | Uitenhage | P.O.Box 277 | 6229 | 041 9953016"> </asp:Label>
            </div>
            <div class="col-3">
            </div>
        </div>
        <hr />
        <asp:Repeater ID="RepeaterEmployee" runat="server">
            <ItemTemplate>
                <table id="Table1" runat="server" class="table table-default table-striped table-bordered table-condensed">
                    <tr>
                        <td colspan="2" style="text-align: center;">
                            <asp:Image ID="Image1" runat="server" ImageAlign="Middle" ImageUrl='<%# GetUrl(Eval("Photo").ToString()) %>' />
                        </td>
                    </tr>
                    <tr>
                        <td style="vertical-align: middle;">
                        </td>
                        <td>
                            <table id="Table2" runat="server" style="width: 100%;">
                                <tr>
                                    <td>
                                        <b>First Name:</b>
                                    </td>
                                    <td>
                                        <asp:Label ID="FirstName" runat="server" Text='<%#Eval("Name") %>'></asp:Label>
                                    </td>
                                </tr>
                                <tr>
                                    <td>
                                        <b>Employee Code:</b>
                                    </td>
                                    <td>
                                        <asp:Label ID="lblCode" runat="server" Text='<%#Eval("Code") %>'></asp:Label>
                                    </td>
                                </tr>
                                <tr>
                                    <td>
                                        <b>Medical Report:</b>
                                    </td>
                                    <td>
                                        <asp:LinkButton ID="btnDownload" Text="Download Medical Report" OnClick="btnDownload_Click"
                                            CommandName="Download" CommandArgument='<%#Eval("Code") %>' runat="server"></asp:LinkButton>
                                    </td>
                                </tr>
                            </table>
                        </td>
                    </tr>
                </table>
            </ItemTemplate>
        </asp:Repeater>
    </div>
</asp:Panel>

Namespaces

C#

using System.Data;
using System.IO;
using iTextSharp.text.html.simpleparser;
using iTextSharp.text;
using iTextSharp.text.pdf;

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        BindRepeater();
    }
}

private void BindRepeater()
{
    DataTable dt = GetData();
    RepeaterEmployee.DataSource = dt;
    RepeaterEmployee.DataBind();
}

private static DataTable GetData()
{
    DataTable dt = new DataTable();
    dt.Columns.AddRange(new DataColumn[] { new DataColumn("Photo", typeof(string)), new DataColumn("Name", typeof(string)), new DataColumn("Code", typeof(int)) });
    dt.Rows.Add("ASPSnippetsLogo.png", "Mudassar", 1);
    dt.Rows.Add("ASPSnippetsLogo.png", "John", 2);
    return dt;
}

protected void btnDownload_Click(object sender, EventArgs e)
{
    DataTable dt = GetData();
    LinkButton button = (sender as LinkButton);
    string commandArgument = button.CommandArgument;
    RepeaterItem item = button.NamingContainer as RepeaterItem;
    int index = item.ItemIndex;
    int lblCode = Convert.ToInt16((item.FindControl("lblCode") as Label).Text);
    RepeaterEmployee.DataSource = dt.Select("Code=" + lblCode + "").CopyToDataTable();
    RepeaterEmployee.DataBind();
    Response.ContentType = "application/pdf";
    Response.AddHeader("content-disposition", "attachment;filename=Panel.pdf");
    Response.Cache.SetCacheability(HttpCacheability.NoCache);
    StringWriter sw = new StringWriter();
    HtmlTextWriter hw = new HtmlTextWriter(sw);
    PanelEmployeeMedicalHistory.RenderControl(hw);
    StringReader sr = new StringReader(sw.ToString());
    Document pdfDoc = new Document();
    HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
    PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
    Response.Write(pdfDoc);
    pdfDoc.Open();
    htmlparser.Parse(sr);
    pdfDoc.Close();
    Response.End();
}

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

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

Screenshot