Html data from database.Display it on aspx page.Then convert it to pdf

i have this in my sql tabel

<img alt="" width="184" height="230" src="/WebACOSApp/Image/Jellyfish.jpg" /><br />
this is my string

Now on my aspx page i have

<form id="form1"  runat="server">
 
    <div id="ImageDisplay"  runat="server">
 
    </div>

    <asp:Button ID="Button2" runat="server" Text="Download PDF with custom text" OnClick="GeneratePDFWithText" />

    </form>

Now my .cs code

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);
            ImageDisplay.RenderControl(hw);
            StringReader sr = new StringReader(sw.ToString());
            Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 100f, 0f);
            HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
            PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
            pdfDoc.Open();
            htmlparser.Parse(sr);
            pdfDoc.Close();
            Response.Write(pdfDoc);
            Response.End();

Could not find a part of the path 'C:\WebACOSApp\Image\Jellyfish.jpg'.

Since my data comes from  database i cant change it..this data is inserted from radeditor