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Questions tagged [predicatebuilder]

Allows you to dynamically composing expression predicates to be used in WHERE clauses in LINQ and also in EntityFramework.

241 questions
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Sitecore Content Search PredicateBuilder vs IEnumerable

I'm having problem with querying IEnumerable computed index field. Im using Sitecore 7.2 upd2, Lucene, ContentSearch and PredicateBuilder. I'm trying to query product prices which are available under products section. There is some heavy Logic to…
Bartek KG
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PredicateBuilder stripping brackets, breaking nested AND's combined with OR

How can PredicateBuilder be used to OR together several statements with nested AND's, without stripping brackets? We are trying to get: (fieldA = X AND fieldB = Y AND fieldC = Z) or (fieldA = A AND fieldB = B and fieldC = C) But the code below…
geoffreys
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Is there a way to use PredicateBuilder with Azure Table Storage?

Just what it says on the tin, I have a design problem where normally PredicateBuilder would be the obvious answer, but when executing, I get errors such as : The expression ((([10007].PartitionKey == "df2907ad-2094-4b7a-9796-d077f14b25bc") And…
Jason Coyne
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Apply PredicateBuilder to query a single object property of a list of items

Given the below sample models, I need to query the ITEMS by properties of its owner. This is Entity Frameworks sets, and I want to do this using LINQ. public class Owner { public int Id { get; set; } public string Name { get; set; } …
Romias
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Comparing against child property in generic/dynamic linq predicate with reflection

I am having to generically build a comparative predicate for an Entity Framework Linq query. I'm using reflection and am able to build a single level Lambda expression without any trouble. However where I am starting to get stuck is I have an…
UnHoly Ram
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Predicate Expression Function for repeated comparisons

I have a predicate handler that tests almost 200 cases, and each test involves five possible comparisons. I want to streamline this code, but am hitting a wall with how to express this syntactically. public static…
Bob Jones
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How to simplify composed predicates in LINQ to WCF Data Services?

I am using PredicateBuilder and Colin Meek's equivalent to compose predicates in an WCF Data Services friendly (i.e. no invocation expressions etc.) way. These work for some queries but fail with "Recursion reached allowed limit" as the query…
DazWilkin
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PredicateBuilder reusable DateTime predicate setter

I'm using PredicateBuilder to generate dynamic search clauses. In the sample code below, is there a way that I can modify SetDateTimePredicate so it can be used for any DateTime property on SomeType? Expression> somePredicate =…
user1360192
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Nesting OR using Linq PredicateBuilder

I am using predicate builder to write the following code: IEnumerable ids= new List { 47, 48 }; var predicate = PredicateBuilder.False(); predicate = predicate.And(x => x.CreatedAt >= fromDate && x.CreatedAt <=…
Thomas
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PredicateBuilder/LINQ Encapsulate predicates, DI

I've started to notice that i my predicate building code looks similar. That's a sign to refactor it. Let's look at the code. var predicate = PredicateBuilder.False(); // Under the covers it will get Guid from a cookie (one…
Auk
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Linq PredicateBuilder

public static IQueryable FilterData(string Filter, Repository dc) { IQueryable data = null; var predicate = PredicateBuilder.True(); Filter =…
user805661
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Linq to Sql, PredicateBuilder and defining general logic

The examples with predicatebuilder show how you can define general logic using predicates. But I'm struggling with the following : Suppose Product has a foreign key relationship with Category and Category has a DateTime? EndDate. I can write some…
rekna
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Entity Framework LinqKit dynamic where predicate over related data

The code is in Alpha version, don't have validations or error management ... It would be included later. I have a very simple model with two related entities: Location and Country: public class UNCountry { public int UNCountryId { get; set; } …
Hermann
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Count entity in Core Data with a specific Value

I have an Entity with some Attribute. I have my tabes already populates(SQLite table) In one Attribute (i'll call Attribute1) i have a bool value, changing during use of my app. How can i return the count of my Entities with Attribute1 value…
Elionline85
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PredicateBuilder, VB.net and Where()

I am building a predicate in VB.net using the PredicateBuilder class from the LinqKit library. My datasource is a manually constructed datatable. All the examples I've found show folks creating the predicate and then passing that predicate as an…
Amanda Kitson
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