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This article mainly shows you "how to solve the LINQ generic dataset problem", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to solve the LINQ generic dataset problem" this article.

A query is an expression that retrieves data from a data source. The query is expressed in a dedicated query language. Over time, different languages have been developed for different types of data sources, such as SQL for relational databases and XQuery for XML. This requires application developers to learn a new query language for each supported data source or data format.

Language Integrated query (LINQ) simplifies this situation by providing a consistent model for using data across a variety of data sources and data formats. Objects are always used in LINQ queries. The same basic encoding scheme is used when querying and transforming XML documents, SQL databases, ADO.NET datasets and entities, data in the. NET Framework collection, and any other source or format data with the corresponding LINQ provider

Define a code that returns a LINQ generic dataset:

Using System

Using System.Collections.Generic

Namespace BlueCube.BusinessLogic

{

/ / /

/ Encapsulates execution result contains whether the

Execution is successful and what messages the invoker will receive.

/ / /

Public class ExecutionResult

{

/ / /

/ True as execution is successful. False as failed.

/ / /

Public bool Success

{

Get

Set

}

Private List _ Messages = null

/ / /

/ Stores message list

/ / /

Public List Messages

{

Get

{

/ / Initialize message list if it is null

If (_ Messages = = null)

{

_ Messages = new List ()

}

Return _ Messages

}

Set

{

/ / Clear existed message list then add new list from value

If (_ Messages! = null)

{

_ Messages.Clear ()

Foreach (string message in value)

{

_ Messages.Add (message)

}

}

Else

{

_ Messages = value

}

}

}

/ / /

/ Encapsulates the value if there is any return value during execution

/ / /

Public T ReturnValue

{

Get

Set

}

}

}

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