DBSet不包含Where的定义 [英] DBSet does not contain a definition for Where
本文介绍了DBSet不包含Where的定义的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
当尝试从模型在数据库上下文中执行.Where()时,遇到以下错误消息:
When trying to execute a .Where() on my database context from a model, I am hit with this error message:
System.Data.Entity<RPSManagementSystem.Model.StoreUser> does not contain a definition for Where...
当从控制器调用它时有效.有什么作用?
This works when calling it from a controller. What gives?
来自模型:
[NotMapped]
private List<StoreUser> _stores { get; set; }
[NotMapped]
public List<StoreUser> Stores
{
get
{
if (this._stores == null || this._stores.Count <= 0)
{
using (RPSEntities db = new RPSEntities())
{
this._stores = db.StoreUsers.Where(su => su.Username == this.Username);
}
}
return _stores;
}
}
只是为了确保我不发疯,我将其粘贴到了控制器中-看起来可以正常工作.下面的屏幕截图:
Just to make sure I'm not crazy, I pasted this into my controller - where it looks to be working. Screenshots below:
在模型中:
在控制器中:
推荐答案
在模型类中使用System.Linq; 添加
Add using System.Linq;
in your model class
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