我需要从控制器 A 调用控制器 B 操作 FileUploadMsgView 并需要为其传递一个参数。

它不会去控制器 B 的FileUploadMsgView()。

这是代码：

控制器A：

private void Test()
{
    try
    {   //some codes here
        ViewBag.FileUploadMsg = "File uploaded successfully.";
        ViewBag.FileUploadFlag = "2";
        RedirectToAction("B", "FileUploadMsgView", new { FileUploadMsg = "File   uploaded successfully" });
    }
}

ControllerB（接收部分）：

public ActionResult FileUploadMsgView(string FileUploadMsg)
{
    return View();
}