linq zip

) Road 15 to LINQ: Element Operators, set methods, and quantifiers of LINQ Operators LINQ LINQ 16: Collection Operators, Zip Operators, conversion methods, and generator methods of LINQ Operators X-DOM introduction to the road to

= q.todictionary (p = p.productid);foreach(intKeyinchQdictionary.keys) {Console. WriteLine (key);}Statement Description: This sample uses todictionary to directly evaluate the query and key expression direct key expressions as dictionaryAdo. NET and LINQ to SQLLINQ to SQL is based on the services provided by the ADO provider model. As a result, we were able to mix LINQ to SQL code with existing ADO-out app

Introduction to Query expressions (LINQ) In the last two articles, I introduced the features and improvements of C #3.0 new language.ProgramIt provides us with great help. From the beginning of this article, we will start to discuss the LINQ. LINQ is short for Language Integrated Query, which is integrated in. net.Programming Language. It has become an integra

Linq learning summary 1-refer to the detailed description of Linq technology, 1-linqKey points:1. The set of linq operations must implement the IEnumerable interface. Therefore, before 3.0, the set that implements this interface must be converted to a Linq-enabled set through the Cast or TypeOf method; 2. the query exp

Linq learning summary 1-refer to the detailed description of Linq technology, 1-linq Two key points: 1. The set of linq operations must implement the IEnumerable interface. Therefore, before 3.0, the set that implements this interface must be converted to a Linq-enabled set

A more concise version will be published in the blog Hall (excluding the English version). I hope this article will help you! Allowed to reprint, trouble to indicate the source: http://www.cnblogs.com/hanxianlongOriginal article:Http://weblogs.asp.net/scottgu/archive/2007/05/29/linq-to-sql-part-2-defining-our-data-model-classes.aspx In Part 1 of my LINQ to SQL blog post series I discussed "What Is

LINQ to datasets require the use of System.Core.dll, System.Data.dll and System.Data.DataSetExtensions.dll, add references System.Data and System.Data.DataSetExtensions to the project.1. DataTable Read ListDataSet ds = new DataSet ();//Omit the DS's fill code datatable products = ds. tables["Product"];ienumerableDataSet ds = new DataSet ();//Omit the DS's fill code datatable products = ds. tables["Product"];var rows = products. AsEnumerable () . Se

db.Products where p.UnitsInStock Statement Description: In this example, the direct key expression of the query and key expression is directly calculated as a Dictionary ADO. NET and LINQ to SQL LINQ to SQL is based on the services provided by the ADO. NET provider program model. Therefore, we can mix the LINQ to SQL code with the existing ADO. NET applicati

LINQ: starts to use LINQ (4)-LINQ to query the type relation of the operation.Start to use LINQ (4)-the type Relationship of the LINQ query operation. The data source, query itself, and query execution are strongly-typed. The types of variables in the query must be the same

Read the catalogue: The main design model of 1.LINQ frame 1.1. Chained design mode (System logic is designed in a pipelined way) 1.2. Chained Query method (stepwise processing of each work point in a query expression) Core design principle of 2.LINQ frame 2.1. Languages above the Managed language (LINQ query expressi

to the LINQ Query method syntax (Fluent Syntax), which provides a number of query methods, such as Aggregate/reduce, all, any, concat, contains, count, distinct, Each, elementat, except, A, groupBy, GroupJoin, intersect, join, last, Min/max, Argmin/argmax, by, reverse, Selec T map, SelectMany, single, Skip, Take, thenby/thenbydescending, ToArray, todictionary/tolookupdictionary, Union, Wheretrue/filter, zip