使用MVC访问从另一个视图传递的数据时遇到麻烦

本文关键字:数据 遇到 麻烦 访问 MVC 另一个 视图 使用 | 更新日期: 2023-09-27 17:53:18

我试图使用MVC将数据从一个视图传递到另一个视图。我正在尝试做一个简单的猜谜游戏,在第一个视图中,我们输入一系列数字,然后在第二个视图中,我们尝试猜测数字。我能够将值存储在我的模型中,但我在另一个视图上的js脚本中访问它们/使用它们时遇到了麻烦。对不起,如果这是太多的代码,MVC的很难寻求帮助,而不显示全范围的代码。当我进入第二个视图猜测数字时,它不识别@ViewBag.(model => model.Low),它显示Load is not defined

pubblic class Range
{
    public int High
    {
        get
        {
            if (HttpContext.Current.Session["High"] == null)
            {
                HttpContext.Current.Session["High"] = 3;
            }
            return (int)HttpContext.Current.Session["High"];
        }
        set
        {
            HttpContext.Current.Session["High"] = value;
        }
    }

    public int Low
    {
        get
        {
            if (HttpContext.Current.Session["Low"] == null)
            {
                HttpContext.Current.Session["Low"] = 1;
            }
            return (int)HttpContext.Current.Session["Low"];
        }
        set
        {
            HttpContext.Current.Session["Low"] = value;
        }
    }
}
控制器

public class GuessingGameController : Controller
{
    public ActionResult EnterRange()
    {
        return View();
    }
    [HttpPost]
    public ActionResult EnterRange(Range range)
    {
        int high = range.High;
        int low = range.Low;
        return View(range);
    }
    public ActionResult GuessNumber()
    {
        return View();
    }
}

View 1: Enter Range

@model GameMVC.Models.Range
@using (Html.BeginForm("EnterRange", "GuessingGame"))
{
    <center>
        <h2>Lets play a game.</h2>
        Enter A Range of Numbers:
        <br />
        Low: @Html.TextBoxFor(m => m.Low)
        <br />
        High: @Html.TextBoxFor(m => m.High)
        <br />
        <input type="submit" value="Enter"/>
        <p>
            @Html.ActionLink("Now, To the Game", "GuessNumber", "GuessingGame")
        </p>
    </center>
}

View 2: Guess Number

@model GameMVC.Models.Range
<script language="JavaScript">
    var myNum, count;
    function Load() {
        document.game.status.value = "Please set range of numbers and press the Start button.";
        document.game.number.focus();
    }
    function Round(scale) {
        var dd = new Date();
        return((Math.round(Math.abs(Math.sin(dd.getTime())) * 8.71 * scale) % scale));
    }
    function myRange() {
        var to = 1 + 1 * @ViewBag.(model => model.Low);
        count = 0;
        myNum = Round(to);
        while (myNum < @ViewBag.(model => model.High);)
            myNum = Round(to);
        document.game.status.value = "Please guess a number, enter it, and press Guess.";
    }
    function Guess() {
        var numberGuess = document.game.number.value;
        count++;
        if (numberGuess < myNum) alert("My number is greater than " + numberGuess + ".");
        else if (numberGuess > myNum) alert("My number is less than " + numberGuess + ".");
        else alert("It takes you " + count + " attempts to guess this number");
    }
</script>
<body onload=" Load() ">
<div style="text-align: center;">
    <form name=game>
        Guess: <input type="text" name="number" size=10>
        <p>
            <br/>
            <input type="button" value="Guess" onclick=" Guess() ">
        </p>
        @Html.Label("status")
    </form>
</div>
</body>

使用MVC访问从另一个视图传递的数据时遇到麻烦

代替@ViewBag.(model => model.Low),您可以尝试使用@Model.Low

没有为"GuessAction"视图提供模型实例。您需要将"Range"的实例传递给"GuessNumber"视图。由于您正在访问session中的值,因此您可以简单地传递一个新实例。

 public ActionResult GuessNumber()
 {
     return View(new Range());
 }

然后在javascript中,你可以简单地以@Model的方式访问数据。High和@Model。低

如果您只需要一个请求,您也可以使用TempData来存储高值和低值。