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How to create an anchored gridview barcode to PDF?

I have a grid that links some barcodes to databases. These are the barcodes I want to generate in pdf format. How can i do this? Sorry, I don't know how to do this so there is no sample code. My grid name is "GrdBarcode". Please help me. Bowow is my grid with barcodes

  <asp:GridView ID="grdBarcode" CssClass="table"   
 OnRowDataBound="grdBarcode_RowDataBound" AutoGenerateColumns="false" 
 GridLines="None" runat="server">
 <Columns>
 <asp:TemplateField>
<ItemTemplate>
 <table style="width:100%">
 <tr>
 <p>Date:<asp:Label runat="server" ID="Label5" Text='<%#Eval("Date") %>'>    
 </asp:Label>   </p></td>
 <td align="center"></td> <td><p>No Of QP: <asp:Label runat="server"   
 ID="Label6" Text='<%#Eval("NoOfQP") %>'></asp:Label></p>
 <p>Time: <asp:Label runat="server" ID="Label7" Text='<%#Eval("Timing") %>'>
 </asp:Label></p>
 <p>Durations: <asp:Label runat="server" ID="Label8"  
Text='<%#Eval("Duration") %>'></asp:Label>)</p>
</td>
</tr>
<tr>
<td colspan="3" align="center">
<asp:DataList ID="datalistBarcode"  RepeatColumns="3"  
RepeatDirection="Horizontal" GridLines="None" 
OnItemDataBound="datalistBarcode_ItemDataBound"  runat="server">
<ItemTemplate> <asp:Label ID="lblBarCode" runat="server"   
Text='<%#Eval("BarCode") %>' Visible="false"></asp:Label>
<table class="table">
<tr> <td >
<asp:Panel ID="pnlBarCode" HorizontalAlign="center"  runat="server">
</asp:Panel>
</tr>
<tr>
<td align="center"><asp:Label ID="lblStudCode" runat="server" 
Text='<%#Eval("StudCode") %>'></asp:Label>
</td>
</tr>
</table>
</ItemTemplate>
 </asp:DataList>
</td>
</tr>
 </table>
</ItemTemplate></asp:TemplateField>
</Columns>
</asp:GridView>

enter image description here

I tried like elow mentioned methode.but it shows error Document has no pages 

 protected void btnPrint_Click(object sender, EventArgs e)
    {
        foreach (GridViewRow row in grdBarcode.Rows)
        {
            DataList dl = (DataList)row.FindControl("datalistBarcode");
            string attachment = "attachment; filename=Article.pdf";
            Response.ClearContent();
            Response.AddHeader("content-disposition", attachment);
            Response.ContentType = "application/pdf";
            StringWriter stw = new StringWriter();
            HtmlTextWriter htextw = new HtmlTextWriter(stw);
            dl .DataBind();
            dl .RenderControl(htextw);
            Document document = new Document();
            PdfWriter.GetInstance(document, Response.OutputStream);
            document.Open();
            StringReader str = new StringReader(stw.ToString());
            HTMLWorker htmlworker = new HTMLWorker(document);
            htmlworker.Parse(str);
            document.Close();
            Response.Write(document);
            Response.End();
        }
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2 answers


Whenever you need a mesh, it's best to use PdfPTable

.

If you don't have barcodes yet, you can create one using iText or iTextSharp. Take a look at Barcodes example for inspiration:

public void createPdf(String dest) throws IOException, DocumentException {
    Document document = new Document();
    PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
    document.open();
    PdfPTable table = new PdfPTable(4);
    table.setWidthPercentage(100);
    for (int i = 0; i < 12; i++) {
        table.addCell(createBarcode(writer, String.format("%08d", i)));
    }
    document.add(table);
    document.close();
}

public static PdfPCell createBarcode(PdfWriter writer, String code) throws DocumentException, IOException {
    BarcodeEAN barcode = new BarcodeEAN();
    barcode.setCodeType(Barcode.EAN8);
    barcode.setCode(code);
    PdfPCell cell = new PdfPCell(barcode.createImageWithBarcode(writer.getDirectContent(), BaseColor.BLACK, BaseColor.GRAY), true);
    cell.setPadding(10);
    return cell;
}

For some C # code when generating barcodes see:



If you already have barcode images you can still use a table, but then there must be a question. How do I organize images within a table?

Answers to questions such as:

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There are two ways to do this, depending on the type of data you have in your database.

If you saved it as a string:

  • Create your Crystal Report
  • Drag the related field to the report
  • change the font of the box to the barcode font you have (usually comes with a stick reader)
  • Export report to PDF


If you saved it as an image:

  • Create your crystal report
  • Get image data from database as Image

    object
  • place the object Image

    inMemoryStream

  • convert MemoryStream

    toByte[]

  • add a column to your data type crystal report Byte[]

  • store the value in this column
  • Drag a new data field to the report and it will be an image
  • Export report to PDF
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