LINQ Dynamic Where - string parameter missing

Question

Hello,

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:

http://stackoverflow.com/questions/848415/linq-dynamic-where-clause/848435#848435

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

Answer 1

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

Answer 2

You need to:

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