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...
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 SQL) HOW TO:在 DataContext 層級篩選 (LINQ to SQL) 查詢範例 (LINQ to SQL) ...
I have a SQL query and want to convert it to LINQ. It would be great if some experienced people could help. CREATE TABLE [dbo].[tbl_payment]( [Id] [int] IDENTITY(1,1) NOT NULL, [Companyid] [int] NULL, [Date] [datetime] NULL, [PaymentAmount]…
走进Linq-Linq to SQL源代码赏析,通过Linq to SQL看Linq 生成的SQL语句是: 大家看到,Linq to SQL使用inner join子句。 但是Linq to SQL在使用join的时候并不是像SQL那样宽松,把上面的SQL语句贴下来: SELECT [t0].[blogname] AS [BlogName],[t1].[Title] AS [PostTitle],[t1].[Body] AS [PostBody] ...
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 ...
走进Linq-Linq to SQL源代码赏析,通过Linq to SQL看Linq 但是不是所有的C#的方法都可以使用呢?答案是否定的。比如: var posts = from post in dbContext.GetTable<Post>() where post.Title.StartsWith("y") select post.CreateDate.ToString("yyyy-MM-dd"); 我想对最后查出来的文章的创建时间做个格式化,...
區域方法呼叫 (LINQ to SQL) 使用LINQ to SQL 的 N-Tier 和遠端應用程式 物件識別 (LINQ to SQL) LINQ to SQL 物件模型 物件狀態和變更追蹤 (LINQ to SQL) 開放式並行存取概觀 (LINQ to SQL) LINQ to SQL 的查詢概念 LINQ to SQL 的安全性 序列化 (LINQ to SQL) 預存程序 (LINQ to SQL) 預存...
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...
I can't answer these questions for your app. But if you think about them, you will likely have a better design. And maybe you won't need a query refresh! In the design of LINQ to SQL, we often pulled back from complex designs when we felt the designs...
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...