Make linq expression case insensitive

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Hello

I am trying to use the dynamic LINQ expression builder from https://gist.github.com/afreeland/6733381

However the I am not sure how to make the "equals" operation case insensitive.

C#

case GridHelper.Operator.Equals:
return Expression.Equal(member, constant);

I want the above to be case insensitive either convert both to lower case or upper case, does not matter.

Pls. any helpful pointers appreciated.

Thanks

Posted 22-Jul-15 12:32pm

Member 1555998

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George Swan 23-Jul-15 1:30am

Have a look at this link
http://blogs.msdn.com/b/csharpfaq/archive/2009/03/25/how-to-use-linq-methods-to-compare-objects-of-custom-types.aspx

2 solutions

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Matt T Heffron · Answer 1 · 2015-07-22T12:51:00

Solution 1

Look at https://msdn.microsoft.com/en-us/library/bb352235(v=vs.110).aspx[^] where you can specify the method (MethodInfo) to implement the actual Equality comparison.

Posted 22-Jul-15 12:51pm

Matt T Heffron

Shmuel Zang · Answer 2 · 2015-07-22T18:55:00

Solution 2

What about converting the strings ToLower or ToUpper before sending them to the Equal expression? Something like:

C#

return Expression.Equal(member.ToString().ToLower(), constant.ToString().ToLower());

Posted 22-Jul-15 18:55pm

Shmuel Zang