I am working on Export to PDF funtionality using C# and PDFSharp. I am getting this error:
Value cannot be null.
Parameter name: elementId
The error is on this line :
PdfDocument document = PdfGenerator.GeneratePdf(htmlcontenttbl.ToString(), PdfSharp.PageSize.A4, 30);
Here's the whole method:
public bool ExportPdf(string htmlcontenttbl)
{
Response.ClearContent();
Response.ClearHeaders();
Response.Buffer = true;
Response.ContentType = "application/octet-stream";
Response.AddHeader("Content-Disposition", "attachment;filename=Myfile.pdf");
//Response.AddHeader("Content-Disposition", "inline;filename=file.pdf");
//Response.AppendHeader("Content-Disposition", "attachment; filename=Myfile.pdf");
Response.Charset = "";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
PdfDocument document = PdfGenerator.GeneratePdf(htmlcontenttbl.ToString(), PdfSharp.PageSize.A4, 30);
var config = new PdfGenerateConfig();
config.PageOrientation = PageOrientation.Landscape;
config.PageSize = PageSize.A4;
config.MarginBottom = 30;
config.MarginTop = 30;
//PdfDocument document = PdfGenerator.GeneratePdf(htmlcontenttbl, config);
byte[] bytes = null;
using (MemoryStream stream = new MemoryStream())
{
document.Save(stream, true);
bytes = stream.ToArray();
}
//var path1 = Server.MapPath("~/Images/" + DateTime.Now.TimeOfDay.Ticks + "result.pdf");
//System.IO.File.WriteAllBytes(path1, bytes);
//Response.TransmitFile(path1, 0, bytes.Length);
//Response.OutputStream.Write(bytes, 0, bytes.Length);
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
return true;
}
That exception can occur if you have a blank anchor tag.
It is likely ultimately being generated from here.
You should remove the blank anchor tag.
Related
I am working on export functionality using PDFsharp in .Net MVC I am not getting any error in my code but not getting PDF file in response.
I have tried doing it manually writing it to specific path with the help of : System.IO.File.WriteAllBytes(path1, bytes); and it's working perfectly, but I am not getting PDF in Response with the help of
Response.BinaryWrite(bytes);
Response.OutputStream.Write(bytes, 0, bytes.Length);
Anyone have faced this type of issue or someone from community please help
Here is my code :
public bool ExportPdf(string htmlcontenttbl)
{
Response.ClearContent();
Response.Buffer = true;
Response.AddHeader("content-disposition",
"attachment;filename=Myfile.pdf");
Response.ContentType = "application/pdf";
Response.Charset = "";
StringWriter sw = new StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
PdfDocument document =
PdfGenerator.GeneratePdf(htmlcontenttbl.ToString(), PdfSharp.PageSize.A4,
30);
var config = new PdfGenerateConfig();
config.PageOrientation = PageOrientation.Landscape;
config.PageSize = PageSize.A4;
config.MarginBottom = 30;
config.MarginTop = 30;
byte[] bytes = null;
using (MemoryStream stream = new MemoryStream())
{
document.Save(stream, true);
bytes = stream.ToArray();
}
var path1 = Server.MapPath("~/Images/" +
DateTime.Now.TimeOfDay.Ticks + "result.pdf");
//System.IO.File.WriteAllBytes(path1, bytes);
//Response.BinaryWrite(bytes);
//Response.OutputStream.Write(bytes, 0, bytes.Length);
Response.Flush();
Response.End();
return true;
}
thank you,
iv'e created a method to generate a pdf file from a form, it got saved to the correct path using itexsharp, but the problem is i can't download it.
this is my code :
private void FillForm(Dictionary<string, string> dic)
{
var pdfTemplate = HttpContext.Current.Server.MapPath("~/ress/GENE_15_04_2014.pdf"); //_pdfTemplet;
var newFile = _newFileName + "_" + Guid.NewGuid() + ".pdf";
_gNewFile = newFile.ToString();
var pdfReader = new PdfReader(System.IO.File.ReadAllBytes(pdfTemplate));
var pfileStream = new FileStream(string.Format(HttpContext.Current.Server.MapPath("~/ress/") + "{0}", newFile), FileMode.Create);
var pdfStamper = new PdfStamper(pdfReader, pfileStream);
var pdfFormFields = pdfStamper.AcroFields;
foreach (var entry in dic)
{
pdfFormFields.SetField(entry.Key, entry.Value);
}
pdfStamper.FormFlattening = true;
pdfStamper.JavaScript = "this.print(true);\r";
pdfStamper.Writer.CloseStream = false;
pdfReader.Close();
pdfStamper.Close();
UPContract.Update();
pfileStream.Close();
pdf.FilePath = string.Format("../Ress/{0}", Path.GetFileName(_gNewFile));
Response.Clear();
byte[] bytes = System.IO.File.ReadAllBytes(string.Format(HttpContext.Current.Server.MapPath("~/ress/") + "{0}", _gNewFile));
Response.ContentType = "application/pdf";
MemoryStream ms = new MemoryStream(bytes);
Response.AddHeader("content-disposition", "attachment;filename=" + "fiche abonnement_" + _gNewFile + ".pdf");
Response.Buffer = true;
ms.WriteTo(Response.OutputStream);
Response.Flush();
Response.End();
}
If you want to pass a file you can skip the byte array and MemoryStream and just use Response.WriteFile(string)
I am getting the following error:
, value hexadecimal 0x02, caracter not valid.
using this code:
using (XLWorkbook wb = new XLWorkbook())
{
wb.Worksheets.Add(dt1);
Response.Clear();
Response.Buffer = true;
Response.Charset ="";
Response.ContentType = "application/vnd.openxmlformats- officedocument.spreadsheetml.sheet";
//Response.AddHeader("content-disposition", "attachment;filename=GridView.xlsx");
Response.AddHeader("content-disposition", "attachment;filename=" + filename);
using (MemoryStream MyMemoryStream = new MemoryStream())
{
wb.SaveAs(MyMemoryStream);
MyMemoryStream.WriteTo(Response.OutputStream);
Response.Flush();
Response.End();
}
}
I have tried different ways, but I still get the same error. "dt1" is filled from stored procedure.
to use ClosedXML I am currently doing the following and I call this method to open the Excel from a web page.
to call the ExportToExcel_SomeReport you would do it like this I create a public static class called Extensions
Extensions.ExportToXcel_SomeReport(dt1, fileName, this.Page);//Call the method on your button click
//this will be in the static public class you create
internal static void ExportToXcel_SomeReport(DataTable dt, string fileName, Page page)
{
var recCount = dt.Rows.Count;
fileName = string.Format(fileName, DateTime.Now.ToString("MMddyyyy_hhmmss"));
var xlsx = new XLWorkbook();
var ws = xlsx.Worksheets.Add("Some Custom Report");
ws.Style.Font.Bold = true;
ws.Cell("C5").Value = "Some Custom Header Report";
ws.Cell("C5").Style.Font.FontColor = XLColor.Black;
ws.Cell("C5").Style.Font.SetFontSize(16.0);
ws.Cell("E5").Value = DateTime.Now.ToString("MM/dd/yyyy HH:mm");
ws.Range("C5:E5").Style.Font.SetFontSize(16.0);
ws.Cell("A7").Value = string.Format("{0} Records", recCount);
ws.Style.Font.Bold = false;
ws.Cell(9, 1).InsertTable(dt.AsEnumerable());
ws.Row(9).InsertRowsBelow(1);
// ws.Style.Font.FontColor = XLColor.Gray;
ws.Columns("1-8").AdjustToContents();
ws.Tables.Table(0).ShowAutoFilter = true;
ws.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
DynaGenExcelFile(fileName, page, xlsx);
}
private static void DynaGenExcelFile(string fileName, Page page, XLWorkbook xlsx)
{
page.Response.ClearContent();
page.Response.ClearHeaders();
page.Response.ContentType = "application/vnd.ms-excel";
page.Response.AppendHeader("Content-Disposition", string.Format("attachment;filename={0}.xls", fileName));
using (MemoryStream memoryStream = new MemoryStream())
{
xlsx.SaveAs(memoryStream);
memoryStream.WriteTo(page.Response.OutputStream);
memoryStream.Close();
}
page.Response.Flush();
page.Response.End();
}
I have some code for showing pdf files in browser that come from ftp. I have to add some text to pdf that come from ftp. And I found some working codes for it from antoher projects but it writes to pdf from iis local path.
//** these are my working code that show pdf files in browser from ftp. **//
string filename = Request.QueryString["view"];
string ftpServerIP = Session["Host"].ToString();
string ftpUserName = Session["user"].ToString();
string ftpPassword = Session["pssw"].ToString();
FileInfo objFile = new FileInfo(filename);
System.Net.FtpWebRequest request = (System.Net.FtpWebRequest)WebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + objFile.Name));
request.Credentials = new NetworkCredential(SftpUserName, ftpPassword);
request.Method = WebRequestMethods.Ftp.GetFileSize;
System.Net.FtpWebResponse response = (System.Net.FtpWebResponse)request.GetResponse();
int length = (int)(response.ContentLength * 1.1);
request = (System.Net.FtpWebRequest)WebRequest.Create(new Uri("ftp://" + ftpServerIP + "/" + objFile.Name));
request.Credentials = new NetworkCredential(ftpUserName, ftpPassword);
request.Method = WebRequestMethods.Ftp.DownloadFile;
response = (System.Net.FtpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream);
BinaryReader br = new BinaryReader(responseStream);
byte[] buffer = br.ReadBytes(length);
//** Can I work the itextsharp codes near here for adding text, without saving local, before download? **//
Response.Clear();
Response.ClearHeaders();
Response.ClearContent();
Response.ContentEncoding = reader.CurrentEncoding;
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "inline; filename=" + Request.QueryString["name"]);
Response.BinaryWrite(buffer);
//** these are another code which I need to implement my code for adding some text in pdf files.**//
//** these are not my actual codes, just from another project's and I have to use them in my project.**//
//** The difference is in my project download pdf directly from an ftp, other one reads pdf in local files.**//
private void WriteToPdf(FileInfo sourceFile, string outbut_File, string stringToWriteToPdf)
{
PdfReader reader = new PdfReader(sourceFile.FullName);
PdfStamper pdfStamper = new PdfStamper(reader, new System.IO.FileStream(outbut_File, FileMode.Create, FileAccess.Write, FileShare.Write));
iTextSharp.text.pdf.PdfGState Gstates = new iTextSharp.text.pdf.PdfGState();
Gstates.StrokeOpacity = 0.3f;
Gstates.FillOpacity = 0.3f;
for (int i = 1; i <= reader.NumberOfPages; i++)
{
iTextSharp.text.Rectangle pageSize = reader.GetPageSizeWithRotation(i);
PdfContentByte pdfPageContents = pdfStamper.GetOverContent(i);
pdfPageContents.BeginText();
BaseFont baseFont__1 = BaseFont.CreateFont(BaseFont.HELVETICA_BOLD, BaseFont.WINANSI, BaseFont.NOT_EMBEDDED);
//BaseFont.CreateFont("", BaseFont.WINANSI, BaseFont.NOT_EMBEDDED)
pdfPageContents.SetFontAndSize(baseFont__1, 15);
pdfPageContents.SetRGBColorFill(255, 0, 0);
pdfPageContents.SaveState();
float textAngle = 0;
pdfPageContents.ShowTextAligned(PdfContentByte.ALIGN_LEFT, stringToWriteToPdf, 5, 5, textAngle);
pdfPageContents.ShowTextAligned(PdfContentByte.ALIGN_LEFT, stringToWriteToPdf, pageSize.Width, pageSize.Height, textAngle);
pdfPageContents.EndText();
}
pdfStamper.FormFlattening = true;
pdfStamper.Close();
reader.Close();
Stream s = File.OpenRead(outbut_File);
byte[] buffer = new byte[s.Length + 1];
try
{
s.Read(buffer, 0, (Int32)s.Length);
}
finally
{
s.Close();
}
Response.ClearContent();
Response.ContentType = "application/pdf";
Response.AddHeader("Content-Disposition", "inline; filename=" + Request.QueryString["name"]);
Response.WriteFile(outbut_File);
Response.End();
}
How should I customise these codes from downloading ftp and adding text then showing in browser?
I want to edit and existing pdf and to send the result to the broswer
Here is my methode:
public static byte[] Generate()
{
var templatePath = HttpContext.Current.Server.MapPath("~/my_template.pdf");
// Based on:
// http://www.johnnycode.com/blog/2010/03/05/using-a-template-to-programmatically-create-pdfs-with-c-and-itextsharp/
var reader = new PdfReader(templatePath);
var outStream = new MemoryStream();
var stamper = new PdfStamper(reader, outStream);
var form = stamper.AcroFields;
var fieldKeys = form.Fields.Keys;
foreach (string fieldKey in fieldKeys)
{
if (form.GetField(fieldKey) == "MyTemplatesOriginalTextFieldA")
form.SetField(fieldKey, "1234");
if (form.GetField(fieldKey) == "MyTemplatesOriginalTextFieldB")
form.SetField(fieldKey, "5678");
}
// "Flatten" the form so it wont be editable/usable anymore
stamper.FormFlattening = true;
stamper.Close();
reader.Close();
return outStream.ToArray();
}
and
The method call
byte[] buffer = Generate();
Response.ContentType = "application/pdf";
Response.AddHeader("content-length", buffer.Length.ToString());
Response.BinaryWrite(buffer);
Can someone help me in this case ?
Add this line
byte[] buffer = Generate();
Response.ContentType = "application/pdf";
Response.AddHeader("content-length", buffer.Length.ToString());
Response.AppendHeader("Content-Disposition", "attachment; filename=youPDFName.pdf");
Response.BinaryWrite(buffer);
Response.End();
I have added Content-Disposition and response.end in code.
tested above code , work fine. let me know if it works you.