如何调用另一个控制器操作从Mvc中的控制器

Question

我需要从Controller A调用控制器B动作FileUploadMsgView并需要为它传递一个参数.

 Code---its not going to the controller B's FileUploadMsgView().
    In ControllerA
  private void Test()
    {

        try
        {//some codes here
            ViewBag.FileUploadMsg = "File uploaded successfully.";
            ViewBag.FileUploadFlag = "2";

            RedirectToAction("B", "FileUploadMsgView", new { FileUploadMsg = "File   uploaded successfully" });
        }

     In ControllerB receiving part
  public ActionResult FileUploadMsgView(string FileUploadMsg)
    {
         return View();
    }

Answer 1

正如@mxmissile在对已接受答案的评论中所说的那样,你不应该新建控制器,因为它将缺少为IoC设置的依赖关系而不会有HttpContext.

相反,您应该得到一个控制器的实例,如下所示:

var controller = DependencyResolver.Current.GetService<ControllerB>();
controller.ControllerContext = new ControllerContext(this.Request.RequestContext, controller);

Answer 2

控制器只是类 - 新的一个并且像调用其他类成员一样调用action方法:

var result = new ControllerB().FileUploadMsgView("some string");

Answer 3

您的示例看起来像psuedo代码.您需要返回以下结果RedirectToAction:

return RedirectToAction("B", 
                        "FileUploadMsgView",
                        new { FileUploadMsg = "File uploaded successfully" });

Answer 4

正如@DLeh所说的那样

var controller = DependencyResolver.Current.GetService<ControllerB>();

但是,给控制器一个控制器上下文非常重要,尤其是当您需要访问User对象,Server对象或HttpContext"子"控制器内部时.

我添加了一行代码:

controller.ControllerContext = new ControllerContext(Request.RequestContext, controller);

或者您也可以使用System.Web访问当前上下文,访问Server或早期提到的对象

注意:我的目标是框架版本4.6(Mvc5)

Answer 5

让解析器自动执行此操作.

内部A控制器:

public class AController : ApiController
{
    private readonly BController _bController;

    public AController(
    BController bController)
    {
        _bController = bController;
    }

    public httpMethod{
    var result =  _bController.OtherMethodBController(parameters);
    ....
    }

}

Answer 6

我知道它很旧，但你可以：

• 创建服务层
• 在那里移动方法
• 两个控制器中的调用方法

Answer 7

如果您使用 .NET Core 或 .NET 5 < 您可以这样做：

中层控制器：

services.AddMvc().AddControllersAsServices();

ApiController：

services.AddControllers().AddControllersAsServices();

然后你可以像任何其他服务一样简单地注入你的控制器

Answer 8

This is exactly what I was looking for after finding that RedirectToAction() would not pass complex class objects.

As an example, I want to call the IndexComparison method in the LifeCycleEffectsResults controller and pass it a complex class object named model.

Here is the code that failed:

return RedirectToAction("IndexComparison", "LifeCycleEffectsResults", model);

Worth noting is that Strings, integers, etc were surviving the trip to this controller method, but generic list objects were suffering from what was reminiscent of C memory leaks.

As recommended above, here's the code I replaced it with:

var controller = DependencyResolver.Current.GetService<LifeCycleEffectsResultsController>();

var result = controller.IndexComparison(model);
return result;

All is working as intended now. Thank you for leading the way.

Answer 9

如果问题是打电话。你可以使用这个方法来调用它。

yourController obj= new yourController();

obj.yourAction();

Answer 10

Dleh 的回答是正确的，并解释了如何在不丢失为 IoC 设置的依赖项的情况下获取另一个控制器的实例

但是，我们现在需要从另一个控制器调用该方法。
完整的答案是：

var controller = DependencyResolver.Current.GetService<ControllerB>();
controller.ControllerContext = new ControllerContext(this.Request.RequestContext, controller);

//Call your method
ActionInvoker.InvokeAction(controller.ControllerContext, "MethodNameFromControllerB_ToCall");

Answer 11

如果有人正在寻找如何在.net核心中执行此操作，则可以通过在启动时添加控制器来完成此操作

services.AddTransient<MyControllerIwantToInject>();

然后将其注入另一个控制器

public class controllerBeingInjectedInto : ControllerBase
{
    private readonly MyControllerIwantToInject _myControllerIwantToInject

     public controllerBeingInjectedInto(MyControllerIwantToInject myControllerIwantToInject)
{
       _myControllerIwantToInject = myControllerIwantToInject;
      }

然后像这样称呼它 _myControllerIwantToInject.MyMethodINeed();