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pevrard
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Posted: 03 November 2008 at 5:56am | IP Logged Quote pevrard
Hi,

I'm trying to attach a file to a MailMessage using Attachment.Add(filename as string) without success. Every time I got the exception:
"Object reference not set to an instance of an object".
The MailMessage object exists as well as the file referred by the filename passed as argument to the method Add.

Is this a bug? The version I'm using is 4.02.105.

Thanks in adavnce for your help
Pierre
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Andrew
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Posted: 03 November 2008 at 6:10am | IP Logged Quote Andrew
As we mentioned in our reply (we sent you via e-mail), it's necessary to run the application in debug mode to learn the line the exception is thrown at. Without more detailed info, it's not possible to say anything for sure.

Also, please don't duplicate questions sent through Request Support form on this forum. Forum has the same priority.

Best regards,
Andrew
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pevrard
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Posted: 03 November 2008 at 6:24am | IP Logged Quote pevrard
I did that. The Exception is raised at line mailMsg.Attachments.Add(_fileAttachmentName);

in the following code extract. I upgraded MailBee recently. With an older version it works perfectly.

mailMsg.Subject = _sageMsgSubject;
             // the text bodypart
             mailMsg.BodyPlainText = _dataTextFromMessage.ToString();
             // and the attachment
             if (File.Exists(_fileAttachmentName))
             {
                mailMsg.Attachments.Add(_fileAttachmentName);
             }
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Andrew
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Posted: 03 November 2008 at 6:34am | IP Logged Quote Andrew
Thank you for additional info.

4.02.105 is not the latest version of MailBee.NET.dll. Please upgrade it to the latest version and try to reproduce the issue.

If the issue still happens, please provide us with full stack trace.

Best regards,
Andrew
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pevrard
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Posted: 03 November 2008 at 6:59am | IP Logged Quote pevrard
The problem is still present, follows the requested information:

System.NullReferenceException was caught
Message="Object reference not set to an instance of an object."
Source="MailBee.NET"
StackTrace:
       at dv.a(String A_0)
       at MailBee.Mime.AttachmentCollection.Add(String filename, String targetFilename, String contentID, String contentType, HeaderCollection customHeaders, NewAttachmentOptions options, MailTransferEncoding mailEnc)
       at MailBee.Mime.AttachmentCollection.Add(String filename, String targetFilename)
       at MailBee.Mime.AttachmentCollection.Add(String filename)
       at ExchangeSageInterface.SageReader.BuildAndSendMail() in C:\GW-Prjs\ESLC_T\Gateways\ExchangeSageInterface\ExchangeSag eInterface\SageReader.cs:line 1440
       at ExchangeSageInterface.SageReader.HandleMessage() in C:\GW-Prjs\ESLC_T\Gateways\ExchangeSageInterface\ExchangeSag eInterface\SageReader.cs:line 1532

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Andrew
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Posted: 03 November 2008 at 7:09am | IP Logged Quote Andrew
Thank you for the stack trace.

Does it happen with a certain file only or with any file?

Does it depend on file size or file type (or even content)?

Please try to reproduce the issue with other files and let us know the outcome.

Best regards,
Andrew
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pevrard
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Posted: 03 November 2008 at 7:13am | IP Logged Quote pevrard


Hi Andrew,

Apparently it happens with any file. I tried with a couple of files of different type (txt, csv), size and content.
I will make some additionnal tests tomorrow.
In any case thanks for your prompt support.

Pierre
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Andrew
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Posted: 03 November 2008 at 7:20am | IP Logged Quote Andrew
Forwarded this info to the developers. They'll investigate the issue.

Will keep you updated.

Best regards,
Andrew
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Andrew
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Posted: 05 November 2008 at 3:20am | IP Logged Quote Andrew
The developers couldn't reproduce the issue. Everything works as expected, no exception is thrown.

Please download this simple application and run it.

It's source code is:
Code:
string attachName = @"5_star_rating.gif";
MailMessage msg = new MailMessage();
msg.From.AsString = "user1@domain.com";
msg.To.AddFromString("user2@domain.com");
msg.Subject = "Hello";
msg.BodyPlainText = "Hello, World!!!";
if (File.Exists(attachName))
{
        msg.Attachments.Add(attachName);
}
msg.SaveMessage(@"temp.eml");


I.e. creates a message, attaches an attachment and saves the message. Try to reproduce the issue via this application. It's important to use the executable from the archive, don't create a new application with this source code.

Please let us know the outcome.

Best regards,
Andrew
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pevrard
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Posted: 05 November 2008 at 6:03am | IP Logged Quote pevrard
It works but my program still not works.

regards
Pierre
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Andrew
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Posted: 05 November 2008 at 6:21am | IP Logged Quote Andrew
We suppose your application still uses old version of MailBee.NET.dll.

Please try to remove the reference to MailBee.NET.dll from your application and explicitly add a new reference to the MailBee.NET.dll you've downloaded along with the sample application. Does it help?

Best regards,
Andrew
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pevrard
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Posted: 06 November 2008 at 12:07am | IP Logged Quote pevrard
Yes it works now.
Thanks a million for your excellent support.

Best regards
Pierre
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