将值从控制器发送到MVC中的View [英] Sending a value from the controller to the View in MVC

问题描述

我有一个从我的数据库中检索值的函数。该值必须从控制器发送到我的视图中指定的变量。这可能吗？



这是我的代码：



我的观点编码：

I have a function that retrieves a value from my database. The value must be sent from the controller to the variable specified in my View. Is this possible?

Here is my code :

The coding from my view:

var playerPosition = "";

playerPosition = document.location.href = "Session/GetPlayerPosition?sessionId=@Model.Id&playerId=" + playerId;

来自我的控制器的编码：

The coding from my controller:

public int GetPlayerPosition(int sessionId, string playerId)
{
    var sessionRepository = new SessionRepository();

    var playerPosition = sessionRepository.GetPlayerPositionByPlayerId(sessionId,    int.Parse(playerId.Replace("|", "")));

    return playerPosition;
}

我收到我正在寻找的价值，但它在空白页面显示我的价值不在我的javascript变量（playerPosition）



有什么想法吗？



提前致谢。

I receive the value I am looking for but it displays my value on an empty page and not in my javascript variable(playerPosition)

Any ideas?

Thanks in advance.

推荐答案

在ASP.NET MVC中，控制器方法的返回类型必须是ActionResult，并且必须向视图返回一些内容，以便视图可以接收它并使用模型数据。您可以使用ViewBag（一个动态对象）来存储稍后在视图中使用所需的一些值，但如果我是你，我将总是返回一个模型并从具有ActionResult返回类型的方法调用一个视图：

In ASP.NET MVC, the controller method''s return type must be of an ActionResult and you must return something to a view so the view can receive it and use the model data. You can use ViewBag, a dynamic object, to store some values you need to later use in the view but if I were you I would always return a model and call a view from a method that has an ActionResult return type:

public ActionResult Player(int sessionId, int playerId)
{
    //Run some Linq statement or call another function, use your variables...
    ViewBag.PlayerPosition = GetPlayerPosition(sessionId, playerId);

    return View();
}

public int GetPlayerPosition(int sessionId, string playerId)
        {
            var sessionRepository = new SessionRepository();

            var playerPosition = sessionRepository.GetPlayerPositionByPlayerId(sessionId,    int.Parse(playerId.Replace("|", "")));

            return playerPosition;
        }

在您的视图中，如果剃须刀视图和使用，您可以在前面调用带有@字符的ViewBag对象变量：

In your view you can call the ViewBag object with an @ character in front if its a razor view and use the variable:

@ViewBag.PlayerPosition

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