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LINQ inside foreach

Posted By:      Posted Date: December 04, 2010    Points: 0   Category :ASP.Net

Hi, I am working with LINQ+sp, when the code runs the second time in a loop, it crushes at the second foreach. It is pointing at the foreach, 
error: "InvalidOperationException was unhandled by user code
The query results cannot be enumerated more than once."

foreach (....)
                    var answersPerQuestion =
                        from a in answersInAPage
                        select new { a.Answer, a.AnswerID };

                    foreach (var i in answersPerQuestion)
                        dic.Add(i.AnswerID, i.Answer);


How do I reuse var answersPerQuestion 

Thank you,

View Complete Post

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check if file exists inside foreach container?


Hi All,

I have a foreach container that checks a folder C:\FTP for an Excel file named Fast_<date>.xls, imports the data, and copies the file to C:\Archive.

I need to add a step that checks C:\Archive for a file with the same name as the file in C:\FTP before the import step.  If the file is already present in C:\Archive, the package should fail.  If it isn't, then it should continue normally.

I found a promising-looking link in a previous post, but the referenced page no longer exists (below).   I have never used a script task, and I will have a different file name each time, so I am a little confused. 

If someone's feeling benevolent, suggestions would be very much appreciated!!

Thanks in advance!

broken link: http://agilebi.com/cs/blogs/jwelch/archive/2007/10/31/checking-for-the-existence-of-a-file.aspx


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