For this tutorial you will need access to a web accessible database. As mentioned in the introduction, I use web hosting account from discountasp.net with a SQL Server 2008 add-on, but there are many options of hosting providers to choose from. To establish a connection with your remote d...
在上篇文章中"LINQ To SQL Discriminator Column Example - Inheritance Mapping Tutorial”,我可以很容易的改变Employee实体的EmployeeType属性为一个枚举EmployeeType,LINQ To Sql会自动去解决枚举和int之间的转换。 在数据库中EmployeeType字段是一个int类型: 我可以添加一个枚举类型,叫EmployeeType: publicenumEmployeeT...
The goal of this tutorial is to explain one method of creating model classes for an ASP.NET MVC application. In this tutorial, you learn how to build model c... (C#)
LINQ to SQL, a component of Visual Studio Code Name "Orcas", provides a run-time infrastructure for managing relational data as objects without losing the ability to query. It does this by translating language-integrated queries into SQL for execution by the database, and then translating the ...
This tutorial has major potential for what I'm trying to do... but what if your tables aren't within the .dbml? I'm just straight calling a sproc and need to access multiple result-sets.Anonymous December 20, 2010 Thanks. The solution provided is too cool. But what will happen, ...
First let's open up the generated LINQ to SQL classes by opening the .Designer.vb file under the dbml file (if you don't see the designer file, just click the "show all files" button on the Solution Explorer tool strip first). If we take a look at our Order class we will see ...
ToList(); EF Core 和 LINQ 在.NET 应用程序开发中提供了无与伦比的便利性和高效性,但性能优化需要精心考量。通过遵循所讨论的最佳实践,包括谨慎使用 AsNoTracking、批量操作、投影以及预编译查询等,开发人员可以增强应用程序的性能和可扩展性。在简单性与性能之间找到平衡,能够确保应用程序在需求增长时依然健壮、...
/* SQL里的表达: 查找用户表自然排序第4个人到第6个人的姓名*/ select name from user limit 3,3; 代码语言:javascript 代码运行次数:0 运行 AI代码解释 /* C#版本1 */ List<string> nameList = (from u in list select u.name).Skip(3).Take(3).ToList(); /* C#版本2 */ List<string> nameLi...
LINQ to SQL will handle step #1 for you when you callSubmitChanges(), but your classes are responsible for updating the other side of their relationship (steps 2 and 3). InA LINQ Tutorial (Part 1), we setBook'sCategoryproperty up as anAssociationso that we can retrieve theCategoryinstance...
Introduction to LINQ queries Query expression basics Write LINQ queries Type relationships in LINQ query operations C# features that support LINQ Tutorial: Writing queries in C# Standard query operators How-to articles Asynchronous programming C# concepts ...