How to generate gridview binded barcode to pdf?

Question

I have grid which binds some barcodes from databas. This barcodes I want to generate in pdf. How can I do this? Sorry I dont have any idea how to do this so there is no sample code to show. My gridview name "GrdBarcode".Please help me.Below 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>      

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();
        }

Answer 1

When you need a grid, it is best to use a PdfPTable.

If you don't have the barcodes yet, you can create them with iText or iTextSharp. Take a look at the 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 on creating barcodes, see:

• Barcode with Text Under using ItextSharp
• Add itextsharp barcode image to PdfPCell
• generate barcode in pdf when using itextsharp to build the pdf
• ...

If you already have the images with the barcodes, you can still use a table, but then the question should be How do I organize images inside a table?

That is answered in questions such as:

• How to add an image to a table cell in iTextSharp using webmatrix
• Image auto resizes in PdfPCell with iTextSharp
• itextsharp and images sizes
• Putting several images next to each other in a pdfcell with itextsharp
• iTextSharp: How to resize an image to fit a fix size?
• Image resizes when inserted in PdfCell
• ...

Answer 2

There is 2 ways to do this depending on the datatype you have in the database.

If you have it stored as a string :

• Create your Crystal Report
• Drag the binded field onto the report
• change the field font to the barcode font you have (usually shipped with wand reader)
• Export the report to PDF

If you have it stored as an image :

• Create your crystal report
• Grab the image data from database as Image object
• put the Image object into a MemoryStream
• convert the MemoryStream to Byte[]
• add a column to your crystal report data to be of type Byte[]
• store the value into this column
• Drag the new data field onto the report and it will be an image
• Export the report to PDF