Support forums - Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Last post 11-24-2009, 9:08 AM by cutechat. 20 replies.

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10-26-2009, 3:26 AM 56660

aldrich12
Joined on 10-14-2009
Posts 22

Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Hi,

Can anyone help me with this error?

Process to repeat error. Upload a file that is more than the max file size limit. Then upload a pdf file.

One more thing to note is the upload progress bar displays NaN%.

Thanks,

Aldrich

10-26-2009, 12:36 PM 56680 in reply to 56660

Adam
Joined on 09-23-2003
Aurora, ON
Posts 18,678

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Aldrich,

Can you reproduce the problems in the following example?

http://ajaxuploader.com/Demo/select-multiple-files-upload.aspx

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10-27-2009, 1:20 AM 56695 in reply to 56680

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

Hi Adam,

No. It's working fine on the Demo.

Thanks,

Aldrich

10-27-2009, 6:54 AM 56703 in reply to 56695

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

Hi Adam,

I tried different pdf files and it seems to be working except for a specific pdf file.

Do you know why it works on the demo and not in my app?

Regards,

Aldrich

10-27-2009, 9:06 AM 56709 in reply to 56703

Adam
Joined on 09-23-2003
Aurora, ON
Posts 18,678

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

aldrich12:

Hi Adam,

I tried different pdf files and it seems to be working except for a specific pdf file.

Do you know why it works on the demo and not in my app?

Regards,

Aldrich

Please send that specifc pdf file to me. [email protected].

Try using the lasting version and make sure that pdf is not locked.

10-29-2009, 3:42 AM 56763 in reply to 56709

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

Hi Adam,

I already sent you the file.

Thanks,

Aldrich

10-29-2009, 2:05 PM 56795 in reply to 56763

Adam
Joined on 09-23-2003
Aurora, ON
Posts 18,678

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

Aldrich,

I tested your PDF file in this example http://ajaxuploader.com/Demo/select-multiple-files-upload.aspx.

It works for me.

10-29-2009, 11:43 PM 56807 in reply to 56795

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Hi Adam,

I checked it again and found out that the problem is because the httpRequest throws null exceptions during the upload. Would you know why this happens? The application I'm working on checks the httpRequest for each application Request. And for some reason, there are certain uploads that contain incompete information for the httpRequest.

Thanks,
Aldrich

10-30-2009, 1:13 PM 56825 in reply to 56807

Adam
Joined on 09-23-2003
Aurora, ON
Posts 18,678

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Aldrich.

Can you create a new application with ajax uploader only then test again?

11-02-2009, 9:07 AM 56843 in reply to 56807

cutechat
Joined on 07-22-2004
Posts 2,332

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Aldrich,

Maybe your application write code in the asp.net pipeline.

Do you get any StackTrace which show where the error throws ?

Regards,
Terry

11-04-2009, 5:41 AM 56905 in reply to 56843

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

Hi Adam,

It works if I create just an ajax uploader.

Hi Terry,

Here is the stack trace.

at Microsoft.VisualStudio.WebHost.Connection.get_RemoteIP()

at Microsoft.VisualStudio.WebHost.Connection.get_RemoteIP()
at Microsoft.VisualStudio.WebHost.Request.GetRemoteAddress()

at System.Web.HttpRequest.get_UserHostAddress()

Thanks,

Aldrich

11-08-2009, 8:20 PM 56966 in reply to 56905

cutechat
Joined on 07-22-2004
Posts 2,332

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Aldrich

I think your web server of the VisualStudio throws that error.

You can try to run such page for test :

<%@ Page Language="C#" %>
<%= Context.Request.UserHostAddress%>

Regards,
Terry

11-12-2009, 1:46 AM 57076 in reply to 56966

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Context.Request.UserHostAddress is throwing a nullexception error for that specific request

when I'm trying to upload the pdf file. Is there any reason why this is happening?

Some additional information, the application I'm working on has three other http modules.

Also, when deployed, the error message becomes "Cannot get the query string".

11-12-2009, 3:13 AM 57080 in reply to 57076

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

I was able to reproduce it in the demo page...

http://ajaxuploader.com/Demo/simple-upload.aspx

11-16-2009, 4:44 AM 57170 in reply to 57080

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

You can try to reproduce it by uploading a document file that is above the max limit. Then after that upload a pdf file.

Is there a way to refresh the control via javascript? If I refresh the page after the warning message for max file size appears, the error does not occur.

11-16-2009, 9:59 PM 57199 in reply to 57080

cutechat
Joined on 07-22-2004
Posts 2,332

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Aldrich,

Can you tell more about how to reproduce it in http://ajaxuploader.com/Demo/simple-upload.aspx ?

If I select a large file , the script will just reject it.

only pdf cause that issue ? how about zip/rar/jpg/doc ??

Regards,
Terry

11-16-2009, 11:43 PM 57203 in reply to 57199

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

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Hi Terry,

Yup... After the script rejects it, then upload a pdf file then the error happens... The only file types I encouter the error on is pdf and jpg files.

I can send you the files that will cause the error if you like. This only happens on IFrame mode.

Regards,

Aldrich

11-17-2009, 8:51 PM 57228 in reply to 57203

cutechat
Joined on 07-22-2004
Posts 2,332

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

Aldrich,

Yes, please send the pdf file to me.

terry @ cutesoft.net

I can't reproduce that using my pdf
http://ajaxuploader.com/Demo/simple-upload.aspx

Regards,
Terry

11-18-2009, 12:09 AM 57235 in reply to 57228

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

Hi Terry,

Just sent the file.

Thanks,
Aldrich

11-19-2009, 3:52 AM 57280 in reply to 57235

aldrich12
Joined on 10-14-2009
Posts 22

Re: Uploading a PDF file sometimes cause "Object reference not set to an instance of an object" error.

Reply Quote

Hi Terry,

Any updates?

Thanks,
Aldrich

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