本文介绍了在控制器构造函数中使用HttpContext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
我试图在像这样的控制器中的构造函数中设置属性:
I was trying to set a property in the constructor af a controller like this:
public ApplicationUserManager UserManager { get; private set; }
public AccountController()
{
UserManager = HttpContext.GetOwinContext().Get<ApplicationUserManager>("");
}
但是正如这里所解释的:
But as explained here:
https://stackoverflow.com/a/3432733/1204249
构造函数中没有HttpContext.
The HttpContext is not available in the constructor.
那么如何设置属性,以便可以在Controller的每个操作中访问它?
So how can I set the property so that I can access it in every Actions of the Controller?
推荐答案
您可以将代码移到控制器(或基础控制器(如果需要整个应用程序中都可以使用)的只读属性)上:
You can move the code into a read-only property on your controller (or a base controller if you need it available across your entire application):
public class AccountController : Controller {
private ApplicationUserManager userManager;
public ApplicationUserManager UserManager {
if (userManager == null) {
//Only instantiate the object once per request
userManager = HttpContext.GetOwinContext().Get<ApplicationUserManager>("");
}
return userManager;
}
}
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