linq-expressions

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How do I dynamically create an Expression<Func<MyClass, bool>> predicate from Expression<Func<MyClass, string>>?

I trying to append where predicates and my goal is to create the same expression as: Services.Where(s => s.Name == \"Modules\" && s.Namespace == \"Namespace\");[详细]

2023-02-13 04:04 分类：问答
Linq Expression Chain Syntax for In Query

I have a query that I cannot seem to replicate in expression method chain syntax. I have two tables \"User\" and \"UserPayment\". User and UserPayment have a one开发者_如何学JAVA to many relation i.e.[详细]

2023-02-13 02:47 分类：问答
How do Linq Expressions determine equality?

I am considering using a Linq Expression as a key in a dictionary.However, I am concerned that I will get strange开发者_开发问答 results, because I don\'t know how Equality is determined by Linq expre[详细]

2023-02-11 12:18 分类：问答
Conversion of Linq expressions

I\'m not sure how exactly argument what I\'m trying to achieve, therefore - wrote some code: public class Foo{[详细]

2023-02-04 11:18 分类：问答
Dynamic property setter with linq expressions?

I want to 开发者_Python百科create a simple function that does the following: Sub SetValue(Of TInstance As Class, TProperty)([详细]

2023-02-02 19:04 分类：问答
linq to sql multiple Where() statements not creating a single expression

My understanding is that the following code: IQueryable<Things> things = dataContext.Things.Take(10);[详细]

2023-02-02 11:40 分类：问答
Passing in a lambda to a Where statement

I noticed today that if I do this: var items = context.items.Where(i => i.Property < 2); items = items.Where(i => i.Property > 4);[详细]

2023-02-02 11:11 分类：问答
MemberExpression to MemberExpression[]

The objective is to get an array of MemberExpressions from two LambdaExpressions.The first is convertible to a MethodCallExpression that returns the instance of an object (Expression<Func<T>&[详细]

2023-01-31 08:16 分类：问答
How To Create A Linq Expression Dynamically?

I\'m trying to figure out a way to create Linq Expressions dynamically.As I 开发者_开发百科understand them, these expressions are one of the new meta-programming features in introduced into .NETI\'m t[详细]

2023-01-24 01:17 分类：问答
Consolidate or reuse LINQ expression

I have a LINQ expression that gets used as a filer in a LINQ to SQL statement where clause. My problem is that the LINQ to SQL expression has become unwieldy and also the logic it contains has ended u[详细]

2023-01-23 02:24 分类：问答