LINQ on Marko Apfel

LINQ and ArcObjects

Wed, 12 Sep 2012 15:20:00 +0200

Motivation

LINQ (language integrated query) is a component of the Microsoft. NET Framework since version 3.5. It allows a SQL-like query to various data sources such as SQL, XML etc.

Like SQL also LINQ to SQL provides a declarative notation of problem solving – i.e. you don’t need describe in detail how a task could be solved, you describe what to be solved at all. This frees the developer from error-prone iterator constructs.

Strange error “argument type ‘lambda expression’ is not assignable to parameter type ‘string’”

Sun, 01 Jul 2012 11:08:00 +0200

During playing with EF and LINQ I run in this UI-error:

argument type ‘lambda expression’ is not assignable to parameter type ‘string’

image

The Compiler themselves states:

Cannot convert lambda expression to type ‘string’ because it is not a delegate type.