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5 results in tag: predicatebuilder

How can I create a predicate method from an expression tree dynamically?

Here's the scenario: Silverlight 4.0, DataGrid, PagedCollectionView itemssource. The objective is to apply a Filter to the PCV. The filter needs to be a ...Predicate<object>(Method)... - where Method implements some logic against the object and returns t...
expression-trees filter predicatebuilder silverlight
asked by tobewan

How to make a linq predicate with nested "ands" and "ors"

I am trying to dynamically create a linq expression at runtime using PredicateBuilder from ...http://www.albahari.com/nutshell/predicatebuilder.aspx.......I currently have a method that takes a list of criteria objects, and then parses those into multiple...
expression-trees linq predicatebuilder
asked by Amanda Kitson

Refactoring using LINQ to Entities and LinqKit / PredicateBuilder was unsuccessful.

I have been trying to refactor a LINQ expression into a method, and have been running into both the "...Internal .NET Framework Data Provider error 1025...." and "...The parameter 'xyz' was not bound in the specified LINQ to Entities query expression...."...
entity-framework-4 expression-trees linqkit linq-to-entities predicatebuilder
asked by danludwig

How does PredicateBuilder work

C# in a Nutshell has a free class called PredicateBuilder which constructs LINQ predicates piece by piece available ...here.... Here's an extract of the method which adds a new expression to the predicate. Could someone explain it? (I have seen ...this...
.net c# expression-trees linq predicatebuilder
asked by just.another.programmer

Using PredicateBuilder to build query searching across multiple columns of Entity

I have a list of field names. I am trying to build a predicate to look in the fields to see if they contain the search term. I have gone done the path listed in this ...original question... but do not understand how to do a ...Contains... instead of a ...
c# entity-framework expression-trees predicatebuilder
asked by John S

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