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How to extract the text from specific coordinates of the PDF document

Platform: ASP.NET Web Forms |
Control: PdfViewer |
Published Date: August 6, 2018 |
Last Revised Date: September 6, 2018

Currently, PDF viewer does not extract the text from the PDF document in Web platform. However, as a workaround, the text from the PDF document is extracted using the PdfLoadedDocument in the server-side of ASP.NET Web forms. Refer to the following code snippet.


<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">

     <table width="70%" style="height: 31px;left:15%;position:absolute">

           <tr style="width: 100%;text-align:center">

                <td >

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

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

                        Text="ExtractText" />




    <div style="left:15%;position:absolute; top:88px">

     <asp:TextBox ID="TextBox1" runat="server" TextMode="multiline" Height="259px" Width="888px"></asp:TextBox>





protected void Button1_Click(object sender, EventArgs e)


            if (System.IO.Path.GetExtension(FileUpload1.PostedFile.FileName).Equals(".pdf"))


                //Get the PDF file stream

                Stream pdfStream = FileUpload1.PostedFile.InputStream;

                //Create an instance for PdfLoadedDocument

                PdfLoadedDocument ldoc = new PdfLoadedDocument(pdfStream);

                //Load the document in the viewer

                foreach (PdfLoadedPage page in ldoc.Pages)


                    //Extract the text from the pages of PDF document

                    TextBox1.Text += page.ExtractText();







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