是正确的分页代码,也就是说问题出在 sortPredicate 参数,或者说是Expression<Func<TAggregateRoot, dynamic>>的参数类型上面,EntityFramework(准确的说应该是是 Linq)中 OrderBy 方法的参数类型是Expression<Func<TSource, TKey>>,TSource 表示数据源类型,TKey 表示返回值类型(注意委托类型为 Func),比如这个参数...
publicstaticIQueryable<T> OrderByDescending<T>(thisIQueryable<T> query,stringname) { varpropInfo = GetPropertyInfo(typeof(T), name); varexpr = GetOrderExpression(typeof(T), propInfo); varmethod =typeof(Queryable).GetMethods().FirstOrDefault(m => m.Name =="OrderByDescending"&& m.GetPa...
System.Console.WriteLine("方法3,返回个数:"+listUnit3.Count());//(OK)方法4//此方法是在查找资料过程中找到的,实现的Linq语法拼入Sql语句的方式,对于习惯写Sql的童鞋可以使用varlistUnit4=dbContext.ba_unit.Where("SortNo = 1").OrderBy("UnitCode");System.Console.WriteLine("方法4,返回个数:"+lis...
在Visual Studio 中使用 Windows Presentation Foundation(WPF)和 Entity Framework 6 建立以資料為基礎的 .NET Framework 應用程式。
二、EntityFramework实例演练 2.1 配置数据库连接 app.config文件添加数据库连接: XML Code: <connectionStrings> <addname="Normal"connectionString="Server=192.168.0.1;Database=CSFrameworkV5_Normal;User ID=sa;Password=test; Max Pool Size=512; Pooling=true;Connect Timeout=30"providerName="System.Data.Sql...
2.2 添加引用最新的Entity Framework 项目上右键单击—》管理NeGut程序包—》联机,找到EntityFramework—》安装 安装之后即可看到packages.config 2.3 建立实体类 1 public class Blog 2 { 3 public int BlogId { get; set; } 4 public string Name { get; set; } ...
You should only use it directly in your code with extreme caution and knowing that doing so can result in application failures when updating to a new Entity Framework Core release. Item[String] Gets the value annotation with the given name, returning null if it does not exist. (Inherited ...
Entity Framework之查询总结 本节针对EF当前支持的查询方式进行分析比较,和简单自定义条件查询的实现。 EF的查询方式 自定义条件查询 一、EF的查询方式 EF提供的查询方式有以下几种 原始SQL查询 LINQ To Entity and Lambda ESQL 与 ObjectQuery ObjectQuery 查询生成器...
The Entity Framework abstracts the logical database structure using a conceptual layer, a mapping layer, and a logical layer. In this column, I review the purpose of each of these layers. I also introduce EntityClient and a new language, Entity SQL, that can interact with the conceptual laye...
Namespace: Microsoft.EntityFrameworkCore.Diagnostics Assembly: Microsoft.EntityFrameworkCore.Relational.dll Package: Microsoft.EntityFrameworkCore.Relational v9.0.0 Source: RelationalStrings.Designer.cs String resources used in EF exceptions, etc. These strings are exposed publicly for use by databas...