Export Web page and Image populated with base64String to PDF using iTextSharp in ASP.Net

Hi milepredy,

milepredy says:

iTextSharp.text.Image picture = iTextSharp.text.Image.GetInstance(imageURL);

 You cant pass directly Image url (base64 string) to the GetInstance method.

You need to remove data:Image/png;base64, from the string.

Check this example. Now please take its reference and correct your code.

HTML

<asp:Image ID="prvimage" runat="server" />
<br />
<table border="1" width="100">
    <tr>
        <td>Name</td>
        <td>Age</td>
    </tr>
    <tr>
        <td>John</td>
        <td>11</td>
    </tr>
    <tr>
        <td>Sam</td>
        <td>13</td>
    </tr>
    <tr>
        <td>Tony</td>
        <td>12</td>
    </tr>
</table>
<br />
<asp:Button ID="btnExport" runat="server" Text="Export" OnClick="btnExport_Click" />

Namespace

C#

using System.IO;
using System.Web;
using System.Web.UI;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.tool.xml;

VB.Net

Imports System.IO
Imports System.Web
Imports System.Web.UI
Imports iTextSharp.text
Imports iTextSharp.text.pdf
Imports iTextSharp.tool.xml

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    // Bind the image from database.
    string strBase64 = @"/9j/4AAQSkZJ....";
    if (strBase64 != null)
    {
        prvimage.ImageUrl = "data:Image/png;base64," + strBase64;
    }
    else
    {
        Response.Write("Must upload an Image");
    }
}

protected void btnExport_Click(object sender, EventArgs e)
{
    using (StringWriter sw = new StringWriter())
    {
        using (HtmlTextWriter hw = new HtmlTextWriter(sw))
        {
            form1.RenderControl(hw);
            StringReader sr = new StringReader(sw.ToString());
            Document pdfDoc = new Document(PageSize.A4, 10f, 10f, 10f, 0f);
            PdfWriter writer = PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
            pdfDoc.Open();
            string imageURL = prvimage.ImageUrl;
            iTextSharp.text.Image picture = iTextSharp.text.Image.GetInstance(Convert.FromBase64String(prvimage.ImageUrl.Replace("data:Image/png;base64,", "")));
            picture.ScaleToFit(105F, 120F);
            pdfDoc.Add(picture);
            XMLWorkerHelper.GetInstance().ParseXHtml(writer, pdfDoc, sr);
            pdfDoc.Close();
            Response.ContentType = "application/pdf";
            Response.AddHeader("content-disposition", "attachment;filename=DigiCV.pdf");
            Response.Cache.SetCacheability(HttpCacheability.NoCache);
            Response.Write(pdfDoc);
            Response.End();
        }
    }
}

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

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    ' Bind the image from database.
    Dim strBase64 As String = "/9j/4AAQSkZJ...."
    If strBase64 IsNot Nothing Then
        prvimage.ImageUrl = "data:Image/png;base64," & strBase64
    Else
        Response.Write("Must upload an Image")
    End If
End Sub

Protected Sub btnExport_Click(ByVal sender As Object, ByVal e As EventArgs)
    Using sw As StringWriter = New StringWriter()
        Using hw As HtmlTextWriter = New HtmlTextWriter(sw)
            form1.RenderControl(hw)
            Dim sr As StringReader = New StringReader(sw.ToString())
            Dim pdfDoc As Document = New Document(PageSize.A4, 10.0F, 10.0F, 10.0F, 0.0F)
            Dim writer As PdfWriter = PdfWriter.GetInstance(pdfDoc, Response.OutputStream)
            pdfDoc.Open()
            Dim imageURL As String = prvimage.ImageUrl
            Dim picture As iTextSharp.text.Image = iTextSharp.text.Image.GetInstance(Convert.FromBase64String(prvimage.ImageUrl.Replace("data:Image/png;base64,", "")))
            picture.ScaleToFit(105.0F, 120.0F)
            pdfDoc.Add(picture)
            XMLWorkerHelper.GetInstance().ParseXHtml(writer, pdfDoc, sr)
            pdfDoc.Close()
            Response.ContentType = "application/pdf"
            Response.AddHeader("content-disposition", "attachment;filename=DigiCV.pdf")
            Response.Cache.SetCacheability(HttpCacheability.NoCache)
            Response.Write(pdfDoc)
            Response.End()
        End Using
    End Using
End Sub

Public Overrides Sub VerifyRenderingInServerForm(ByVal control As Control)
End Sub

Screenshot