LINQ Dynamic Where - string parameter missing

Question

I am sure this is something really simple, but I am going bonkers trying to figure out why.

I have the following code:

string condition = string.Format("{0}.Contains({1})", column, value);

var query = DataContext.MyTable.Where(condition);

The strange thing that I am getting is an error saying:

Argument cannot convert from string to 'System.Linq.Expressions.Expression<System.Func<Context.MyTable, bool>>'

I thought that you could pass in a string to the where clause without a problem such as indicated in this post:

Dynamic WHERE clause in LINQ

Any thoughts on what I am missing? Perhaps an invalid namespace (I have System.Linq)?

Craig Stuntz · Accepted Answer · 2010-02-22 19:03:22Z

3

You need to:

Download dynamic query with the C# samples.
Reference it in your project.
Add using System.Linq.Dynamic
Follow the format specified in the documentation for that library.

answered Feb 22, 2010 at 19:03

Craig Stuntz

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1 Comment

CodeLikeBeaker Over a year ago

Thank you, I am giving you accepted answer only because you answered first and I found the information before the other person posted and I did not see his post until after I got it to work. This worked like a charm. Thanks.

Giorgi · Accepted Answer · 2010-02-22 19:02:11Z

3

That answer has a link to a library that you need to download.

answered Feb 22, 2010 at 19:02

Giorgi

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1 Comment

CodeLikeBeaker Over a year ago

Thanks I did not see that in there before. +1 for the info though. Thanks!

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