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Check this article out to do what you want: <a href="http://www.albahari.com/nutshell/predicatebuilder.aspx" rel="noreferrer">http://www.albahari.com/nutshell/predicatebuilder.aspx</a> This works like a dream. I essentially cut and pasted their code and got this back (with my own data-scheme of course): <pre><code>SELECT [t0].[Id], [t0].[DateCreated], [t0].[Name] ... FROM [dbo].[Companies] AS [t0] WHERE ([t0].[Name] LIKE @p0) OR ([t0].[Name] LIKE @p1) </code></pre> Here is the code I ran for the proof of concept: <pre><code>using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Linq.Expressions; namespace PredicateTest { class Program { static void Main(string[] args) { DataClasses1DataContext dataContext = new DataClasses1DataContext(); Program p = new Program(); Program.SearchCompanies("test", "test2"); var pr = from pi in dataContext.Companies.Where(Program.SearchCompanies("test", "test2")) select pi; } DataClasses1DataContext dataContext = new DataClasses1DataContext(); public static Expression<Func<Company, bool>> SearchCompanies( params string[] keywords) { var predicate = PredicateBuilder.False<Company>(); foreach (string keyword in keywords) { string temp = keyword; predicate = predicate.Or(p => p.Name.Contains(temp)); } return predicate; } } public static class PredicateBuilder { public static Expression<Func<T, bool>> True<T>() { return f => true; } public static Expression<Func<T, bool>> False<T>() { return f => false; } public static Expression<Func<T, bool>> Or<T>(this Expression<Func<T, bool>> expr1, Expression<Func<T, bool>> expr2) { var invokedExpr = Expression.Invoke(expr2, expr1.Parameters.Cast<Expression>()); return Expression.Lambda<Func<T, bool>> (Expression.OrElse(expr1.Body, invokedExpr), expr1.Parameters); } public static Expression<Func<T, bool>> And<T>(this Expression<Func<T, bool>> expr1, Expression<Func<T, bool>> expr2) { var invokedExpr = Expression.Invoke(expr2, expr1.Parameters.Cast<Expression>()); return Expression.Lambda<Func<T, bool>> (Expression.AndAlso(expr1.Body, invokedExpr), expr1.Parameters); } } } </code></pre> I'd suggest going to the site for the code and explanation. (I am leaving the first answer because it works well if you need an IN statement)
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