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linq query with dynamic where's

Posted on 2013-11-13
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Last Modified: 2016-02-10
I am passing in the possibility of 7 parameters into a function  

public string GetFilter(string Var1, string Var2, string Var3, string Var4, string Var5, string Var6, string Var7)

The vars will not always have a value. The Var could be "". I want to build a linq query where my where clause uses the Var if it contains a value. What's the best way to accomplish this with the least amount of code overhead.
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Question by:NickMalloy
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Éric Moreau earned 1600 total points
ID: 39646677
you can use composition to create your query. it is effective and very easy to read and maintain:

If Not String.IsNullOrEmpty(Var1) Then
     qry = qry.Where(Function(c) If(c.Family Is Nothing, "", c.Family) = Var1)
End If
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