[Mono-dev] creating excel files

eng. Ahmed Youssef ahhatem at gmail.com
Sat Feb 26 07:04:18 EST 2011

Hello everyone,

Sorry for the late reply but I thought I do my homework first...

After moving to mono 2.10 on opensuse, I managed to make the library work on
The problem was with this scenario:

using System;
using System.IO.Packaging;
using System.IO;

namespace test
class MainClass
public static void Main (string[] args)
 MemoryStream stream = new MemoryStream ();
Package p = Package.Open (stream, FileMode.Create, FileAccess.ReadWrite);
 p.Close ();

throws this exception:

Unhandled Exception: System.ObjectDisposedException: The object was used
after being disposed.
  at System.IO.MemoryStream.CheckIfClosedThrowDisposed () [0x00000] in
  at System.IO.MemoryStream.ReadByte () [0x00000] in
  at test.MainClass.Main (System.String[] args) [0x00000] in <filename

the package.Close call internally makes this:

public void Close()

for some reason the dispose call disposes the stream too....

After replacing the package.Close() with package.Flush().... the EPPlus lib
works nicely....

I hope that is useful... I don't mind digging into the issue more but I am
not sure how to do that.... any info would be appreciated.
I hope you confirm that it is a mono issue and that it will be fixed so that
either mono is fixed or the library...

Thank you all for the help.

On Tue, Feb 22, 2011 at 7:11 PM, jmalcolm <malcolm.justin at gmail.com> wrote:

> I am not sure how big the spreadsheets are that you need to work with but I
> have used the free version of GemBox to great effect:
> http://www.gemboxsoftware.com/GBSpreadsheetFree.htm
> --
> View this message in context:
> http://mono.1490590.n4.nabble.com/creating-excel-files-tp3315324p3319632.html
> Sent from the Mono - Dev mailing list archive at Nabble.com.
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> Mono-devel-list at lists.ximian.com
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