HOW TO:控制擷取的相關資料量 (LINQ to SQL) HOW TO:篩選相關資料 (LINQ to SQL) HOW TO:關閉延後載入 (LINQ to SQL) HOW TO:直接執行 SQL 查詢 (LINQ to SQL) HOW TO:儲存和重複使用查詢 (LINQ to SQL) HOW TO:處理查詢中的複合索引鍵 (LINQ to SQL) HOW TO:一次擷取許多物件 (LINQ to ...
有的时候啊,你的属性里的set里面应用了复杂的业务逻辑,而Linq to SQL在将值从数据库取出,然后赋值给这个属性的时候,默认是要使用这个set的,这个时候在这种情况下(从数据库取值赋给类的属性),你并不想执行这个set里面的逻辑,想把这个值直接给属性背后的那个私有字段: privatefloat_price; /// ///由于某些原因...
result.data = _dbContext.Database.SqlQuery<sysmstatusgroup_dto>(sqlFinal).ToList(); but then i get an error which says that i cannot use SqlQuery anymore on the new entity framework. Is there a work around that i go with to achieve the same task? Also to break down it further what...
SQL Server 二進位和大數值資料 (ADO.NET) ADO.NET 中的 SQL Server 資料作業 SQL Server 功能及 ADO.NET LINQ to SQL LINQ to SQL 使用者入門 (LINQ to SQL) 程式設計手冊 (LINQ to SQL) 程式設計手冊 (LINQ to SQL) 建立物件模型 (LINQ to SQL) 與資料庫通訊 (LINQ to SQL) 查詢資料庫 (LINQ ...
AROUT BSBEV CONSH EASTC NORTS SEVES VB 複製 db.Log = Console.Out Dim custQuery = _ From cust In db.Customers _ Where cust.City = "London" _ Select cust For Each custObj In custQuery Console.WriteLine(custObj.CustomerID) Next 請參閱 其他資源 偵錯支援 (LINQ to SQL)中文...
Sometimes people wonder if it is possible to use LINQ to SQL without having to use the designer and the automaticallygenerated .dbml files and classes. The short answer is yes, and it is not even very hard to do.In the end it may be worth using the designer, for example,...
there are "+"different standard functions. Because the object world has no notion of query, a "+"query can only be represented as a string without compile-time type checking or "+"IntelliSense support in the IDE. Transferring data from SQL tables or XML trees to "+"objects in memory is...
Select CodeId, Description FROM CodeTable WHERE CodeId IN ('1a','2b','3') 在Linq to Sql中,我似乎找不到" In“子句的等价物。到目前为止,我发现的最好的(不起作用)是: 代码语言:javascript 运行 AI代码解释 var foo = from codeData in channel.AsQueryable<CodeData>() where codeData.CodeId ...
How to: Store and Reuse Queries (LINQ to SQL) How to: Handle Composite Keys in Queries (LINQ to SQL) How to: Retrieve Many Objects At Once (LINQ to SQL) How to: Filter at the DataContext Level (LINQ to SQL) Query Examples (LINQ to SQL) Query Examples (LINQ to SQL) Aggregate Quer...
As we get closer to a release, it is time to mention a few less known LINQ to SQL (fka DLinq) features that I get emails about. Here is the first in the series about enum mapping. Here is an example based on the northwind database that enhances the usual generated Northwind DataContex...