Subject: BinaryWrite of merged pdf byte array causes error
Date: 2011-03-17 09:39:46
From: Bob Pope
Source: binarywrite-merged-pdf-byte-array-causes-error
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I have generated a pdf from SQL Server Reporting services and I have merged it with attachments and then saved those attachments to a file on disk, the saved file is opened by Acrobat Reader without error.
When I try to write binary array to an HttpResponse stream with Response.BinaryWrite(reportByteArray) I get the error: "The file is corrupted and cannot be repaired" from the Acrobat Reader plugin inside IE8. The code I am using follows:
///<summary>
/// This is how we write PDF stream to response do not throw this code.
///</summary>
///<remarks></remarks>
void WriteToStream(int rowID)
{
try
{
//bytes = rptvRH.LocalReport.Render("PDF" _
// , Nothing _
// , mimeType _
// , encoding _
// , extension _
// , streamids _
// , warnings)
string[] objstreamids;
string objmimeType;
string objencoding;
string objextension;
byte[] objbytes;
Microsoft.Reporting.WebForms.Warning[] warnings;
objbytes = ReportViewer.LocalReport.Render("PDF"
, null
, out objmimeType
, out objencoding
, out objextension
, out objstreamids
, out warnings);
objbytes = MergeAttachments(objbytes, rowID);
//'Set content type
Response.ContentType = "application/pdf";
//' IE & Acrobat seem to require "content-disposition" header being in the response. If you don't add it, the doc still works most of the time, but not always.
//' this makes a new window appear: Response.AddHeader("content-disposition","attachment; filename=MyPDF.PDF");
Response.AddHeader("content-disposition", "inline; filename=MyPDF.PDF");
Response.BinaryWrite(objbytes); // Write the PDF stream out
Response.Flush(); // Send all buffered content to the client
}
catch (Exception ex)
{
WriteGenericException(ex);
}
}
/// <summary>
/// Take the created report and add attachments
/// </summary>
/// <param name="masterReport"></param>
/// <returns></returns>
private byte[] MergeAttachments(byte[] masterReport, int rowID)
{
//get the attachments
var _dataContext = new ReportEntities();
var _attachments = from a in _dataContext.Expense_Report_Attachments
where a.Master_Row_ID == rowID
select a;
//put the attachments into streams
List<MemoryStream> sa = new List<MemoryStream>();
MemoryStream mr = new MemoryStream(masterReport);
sa.Add(mr);
foreach (var item in _attachments)
{
var receipt = item.Image;
MemoryStream ms = new MemoryStream(receipt);
sa.Add(ms);
}
//merge the masterReport and attachments
PdfDocument FullReport = new PdfDocument();
PdfDocumentBase.Merge(FullReport, sa.ToArray());
MemoryStream fr = new MemoryStream();
FullReport.Save(fr);
string file = Server.MapPath("/Temp") + @"\FullReport.pdf";
FullReport.Save(file);
//Return to the caller
return fr.ToArray();
}
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