扩展了实体框架的功能类库.

https://github.com/loresoft/EntityFramework.Extended

1、批量更新/删除

1）删除

//delete all users where FirstName matchescontext.Users.Delete(u => u.FirstName == "firstname");

2）更新

//update all tasks with status of 1 to status of 2context.Tasks.Update(    t => t.StatusId == 1,     t2 => new Task {StatusId = 2});//example of using an IQueryable as the filter for the updatevar users = context.Users.Where(u => u.FirstName == "firstname");context.Users.Update(users, u => new User {FirstName = "newfirstname"});

2、查询结果缓存

存查询结果，使用扩展方法FromCache位于EntityFramework。命名空间扩展。下面是一个示例缓存查询结果。从构建LINQ查询你的都会，然后追加的FromCache延伸。

1）默认设置

//query is cached using the default settings  //查询缓存是使用默认设置var tasks = db.Tasks    .Where(t => t.CompleteDate == null)    .FromCache();//query result is now cached 300 seconds //现在是300秒的缓存查询结果

var tasks = db.Tasks    .Where(t => t.AssignedId == myUserId && t.CompleteDate == null)    .FromCache(CachePolicy.WithDurationExpiration(TimeSpan.FromSeconds(300))); //删除缓存  db.Tasks.Where(t => t.AssignedId == myUserId && t.CompleteDate == null).RemoveCache();

2）标记缓存

查询结果缓存还支持标记缓存，这样您就可以通过调用过期的缓存标记过期公共缓存条目。

// cache assigned tasks 设置缓存 var tasks = db.Tasks    .Where(t => t.AssignedId == myUserId && t.CompleteDate == null)    .FromCache(tags: new[] { "Task", "Assigned-Task-" + myUserId  });// some update happened to Task, expire Task tag   如果这个发生修改.则过期缓存标记CacheManager.Current.Expire("Task");

CacheManager支持提供程序使用MemoryCache存储高速缓存条目。实现自定义提供程序，实现ICacheProvider。自定义提供程序将需要在定位器解析器注册。

// Replace cache provider with Memcached provider   替换缓存Locator.Current.Register
     
      (() => new MemcachedProvider());
     

默认缓存策略

When no CachePolicy is set, the CachePolicy.Default is used. You can set the values of CachePolicy.Default on application startup to have default settings.

当没有CachePolicy设置，使用默认的CachePolicy.Default。你可以设置CachePolicy.Default值。在应用程序启动时默认为默认设置。

3、检查日志

能将在任何时间提交到数据库时捕捉到实体的更改。检查日志只捕获被改变的实体，只捕获那些被改变的实体的属性。记录前后的值。在这个信息AuditLogger.LastAudit是举行并有一个可以很容易的把检查日志为XML便于储存ToXml()方法。

The AuditLog can be customized via attributes on the entities or via a Fluent Configuration API.

检查日志可以通过定制的实体或属性通过Fluent API配置。

// config audit when your application is starting up...   当您的应用程序启动时，配置检查日志var auditConfiguration = AuditConfiguration.Default;auditConfiguration.IncludeRelationships = true;auditConfiguration.LoadRelationships = true;auditConfiguration.DefaultAuditable = true;// customize the audit for Task entity    自定义检查日志   实体auditConfiguration.IsAuditable
     
      ()    .NotAudited(t => t.TaskExtended)    .FormatWith(t => t.Status, v => FormatStatus(v));// set the display member when status is a foreign key  当状态外键时 设置显示组件auditConfiguration.IsAuditable
      
       ()    .DisplayMember(t => t.Name);
      
     

创建检查日志

var db = new TrackerContext();var audit = db.BeginAudit(); // make some updates ...   一些代码db.SaveChanges();var log = audit.LastLog;