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POHow to break apart the Linq expression inside an Any clause
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2013-03-26T20:02:16.110
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2013-03-26T20:31:32.400
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2013-03-26T20:31:32.400
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I am trying to make a modular Linq query (to an OData source). This is a simplified version of my query: <pre><code>// Any clause that I want to be modular Func<Encounter, bool> orderAnyClause = x => x.OrderName.StartsWith("Order 00"); // Query using the any clause var result = entities.Customers.Where(cust=> cust.Orders.Any(orderAnyClause)); // A method to do the selection. It works just fine. IQueryable<SearchSelectionResult> selectedResults = SelectResults(result); // This throws the exception shown below var list = selectedResults.ToList(); </code></pre> This all compiles fine, but when I run it my any clause causes this exception: <blockquote> Unable to cast object of type 'System.Linq.Expressions.ConstantExpression' to type 'System.Linq.Expressions.LambdaExpression'. </blockquote> I know it is my any clause because if I embed the the clause in the statement, it all works fine. Why am I getting this error? And how can I break this statement out and not get the error? <hr> Update: Using an Expression I tried to use an expression like this: <pre><code>Expression<Func<Encounter, bool>> orderAnyClause = x => x.OrderName.StartsWith("Order 00"); </code></pre> And I get the following compile time error message: <pre><code>Instance argument: cannot convert from System.Data.Services.Client.DataServiceCollection<ODataComponetizedQueriesTest.MyEntities.Order>' to 'System.Linq.IQueryable<ODataComponetizedQueriesTest.MyEntities.Order>' </code></pre>
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<c#><.net><linq><wcf-data-services><odata>
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How to break apart the Linq expression inside an Any clause
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