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.net 4.5 - what does this mean?

Posted on 2014-03-09
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Last Modified: 2014-03-10
I have a site that's not working in IE11. I get the _doPostBack error.

I fixed this for IE10 but running a patch from Microsoft.

Now, I'm getting it in IE11:

http://www.hanselman.com/blog/IE10AndIE11AndWindows81AndDoPostBack.aspx

"This whole concept has been long-fixed in ASP.NET 4.5. If you have a .NET 4 app you put .NET 4.5 on it and you're set. We don't sniff like this anymore"

That means install framework 4.5? (I just noticed that fix is for Windows 8.1. I probably have to look for another solution or upgrade my code to 4.5)
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Question by:Camillia
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Gary earned 2000 total points
ID: 39916399
That's because IE11 does not report itself the same way
Is there a reason you cannot update .net?
http://www.microsoft.com/en-gb/download/details.aspx?id=30653
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by:Camillia
ID: 39916408
I just asked our hosting server to update .net on our staging server first.

Do I need to upgrade the code to VS2013/4.5 as well? I was planning on doing it in the next couple of weeks. Would it work for now, with VS2010 code that I have?
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Expert Comment

by:Gary
ID: 39916412
Have a browse thru
http://msdn.microsoft.com/en-us/library/hh367887%28v=vs.110%29.aspx

and see if there is anything you need to update prior to the upgrade so you are ready for it.
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LVL 7

Author Comment

by:Camillia
ID: 39916430
Looked at the list and looks like I'd be fine.

Now, suppose something doesn't work, I can still go back to 4.0, I think. Isn't that in IIS that I can set the application pool ?
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Expert Comment

by:Gary
ID: 39916437
No, its an inplace upgrade, once installed there is no going back.

Microsoft
Lets create a browser that doesn't tell anyone its IE10, and breaks .net, then create a fix so it recognises IE10, then we will create IE11 but lets change how it announces itself to the world again so it breaks all your sites again, then lets create .net 4.5 to fix all those sites but lets not give anyone the option of still running their .net 4.0 projects and so on and so on...
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Author Comment

by:Camillia
ID: 39916438
Oh boy :)

I'm going to upgrade the code from 2010 to 2013 within the next 2 weeks.
Based on that link, I should be ok, tho.

The code is straight forward; LINQ, stored procs, Listview, upload/download files. Nothing fancy in it.
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LVL 58

Expert Comment

by:Gary
ID: 39916441
I did just amend my comment, no extra info but a rant.
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LVL 7

Author Comment

by:Camillia
ID: 39916484
LOL. I love that rant. Pretty funny :)

Maybe Satya Nadala would help the issues users have been facing.
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LVL 7

Author Comment

by:Camillia
ID: 39917883
Our hosting server upgraded and it works now. Thanks.
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LVL 58

Expert Comment

by:Gary
ID: 39917907
Good stuff.
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