linq storage

Comprehensive Writing of Linq and comprehensive Writing of linq Var queryCount = (from pv in db. ProvinceJoin pc in (from cc in(From v in db. ERPStockProductTriggerJoin s in db. Storage on v. StorageID equals s. StorageIDJoin B in db. BranchSet on s. BranchSetID equals B. IdJoin p in db. Product on v. ProductID equals p. IdJoin c in db. PriceProfile. Where (w =>

The previous chapter briefly introduced the basic knowledge of LINQ. How should we use LINQ to connect to the database and operate the data? The following is an example: 1. Create an empty website. 2. Create the linqdata. MDF database, add the table product, and then add data to the table. 3. Create linqproduct. dbml and drag the table product to it. 4. Create a web for

Http://u.115.com/file/f2f877c8d1 demo LINQ to SQL supports all the key functions that SQL developers expect. You can query information in a table, insert information in the table, and update and delete information in the table. SelectYou can select (Project) by writing a LINQ query in your own programming language and then executing the query to retrieve the result ). To convert all necessary operations int

Members of the LINQ to XML,Property list: Property Description Document Get XDocument of this XObject Emptysequence Gets the empty element collection FirstAttribute Gets the first property of this element Firstnode Gets the first child node of this node HasAttributes Gets a value that indicates whether this element has at least one propert

. Net uses the record about Linq today, And. net uses linq today. I have been in touch with. net since my internship for more than half a year. Today, I have encountered a problem with LINQ in my project. So I searched the internet and found out here to make it easier for me to view 0_0. Language Integrated Query is a set of extensions for c # and Visual Basic

Label:Three ways: LINQ, LAMBDA, SQL syntax 1. Simple LINQ Syntax 1 var ss = from R in Db. Am_recproscheme Select R; 2 var SS1 = db. Am_recproscheme; 3 String sssql = "SELECT * from Am_recproscheme"; 2. Query with where 1 var ss = from R in Db. Am_recproscheme where r.rpi

Label:Let's go on to the LINQ to SQL statement, which we'll talk about Insert/update/delete operations. This is most commonly used in our programs. We look directly at examples.Insert/update/delete operation Insert (INSERT) 1. Simple FormDescription: The new object, which is added to the corresponding collection using the InsertOnSubmit method, is submitted to the database using SubmitChanges (). NorthwindDataContext db = new NorthwindDataContext ();

attribute to the column attribute of the primary key column. The value is true. For example: // // auto-incrementing primary key /// [column (storage = "_ pkid" , autosync = autosync. oninsert, dbtype = "int not null identity" , isprimarykey = true , isdbgenerated = true , isversion = true )] Public int pkid This article is very important. Otherwise, you will encounter many problems when using

Let's go on to the LINQ to SQL statement, which we'll talk about Union all/union/intersect operations and TOP/BOTTOM operations and paging operations and sqlmethods operations.Union All/union/intersect operationScenario: two sets of processing, such as append, merge, take the same items, intersect items and so on.Concat (Connection)Description: Connect a different collection. Do not actively filter the same; delay.1. Simple form:var q = (from C in

Tags: style blog color ar strong SP div on log1. One-to-manyvar expr = context. Products "LINQ to SQL" p.unitprice > 10m) New { p.productid, p.productname });var from inch context. Productswhere"LINQ to SQL" p.unitprice > 10m Selectnew { p.productid, p.productname };SELECT [Extent1].[ProductID] as