c# - 用户输入月份编号 1-12 并且 http post 返回月份名称的应用程序不起作用

Question

我有一个应用程序要求用户在表单字段中输入数字 1-12。点击提交按钮后，他们应该返回到告诉他们相应月份的 http 帖子。

示例:如果用户输入“9”，http 帖子应该显示为“您选择的月份是‘9 月’”

截至目前，该帖子仅再次返回数字，而不是月份的字符串/名称。我知道有几种方法可以做到这一点，请随时向我展示一种更简单/更快捷的方法，但我尝试使用 if/else if 语句。这是我到目前为止所拥有的(使用:visual studio 2013/MVC-asp.net)

型号:

public class IterApp
    {
       public int CurrentMonth { get; set; }

    }

Controller :

public ActionResult NumberApp()
        {
            IterApp model = new IterApp();
            return View();
        }

        [HttpPost]
        public ActionResult NumberAppResults(IterApp ia)
        {

            return View(ia);
        }

VIEW NumberApp(表单 View ):

<script>

        var CurrentMonth = $("#CurrentMonth").val();

        function whichMonth()
        {
            if(CurrentMonth >= 1)
            {
                CurrentMonth = "January";
            }
            else if(CurrentMonth >= 2)
            {
                CurrentMonth = "February";
            }
            else if(CurrentMonth >= 3)
            {
                CurrentMonth = "March";
            }
            else if(CurrentMonth >= 4)
            {
                CurrentMonth = "April";
            }
            else if(CurrentMonth >= 5)
            {
                CurrentMonth = "May";
            }
            else if(CurrentMonth >= 6)
            {
                CurrentMonth = "June";
            }
            else if(CurrentMonth >= 7)
            {
                CurrentMonth = "July";
            }
            else if(CurrentMonth >= 8)
            {
                CurrentMonth = "August";
            }
            else if(CurrentMonth >= 9)
            {
                CurrentMonth = "September";
            }
            else if(CurrentMonth >= 10)
            {
                CurrentMonth = "October";
            }
            else if(CurrentMonth >= 11)
            {
                CurrentMonth = "November";
            }
            else
            {
                CurrentMonth = "December";
            }
        }



    </script>

    <div>
        <br />
        <form method="post" action="NumberAppResults" onsubmit="return (whichMonth)">
            Let's start a new iteration! This time, enter the NUMBER (1-12) of the month you'd like to output:
            <br />
            <br />
            <input id="CurrentMonth" type="text" name="CurrentMonth" />
            <br/>
            <br />
            <input type="submit" value="Which Month is it?" />

        </form>
    </div>

查看 NumberAppResults(http 帖子):

<span>The Month you chose is:</span>
    <span>@Model.CurrentMonth</span>

Answer 1

我很可能看错了，但我不太确定你如何将 CurrentMonth 作为字符串返回，而它在你的类中是一个 int。那就是说，为什么不试试这个呢？

public class IterApp
    {
       public int CurrentMonth { get; set; }
       public string MonthName { get; set; }

    }

    public ActionResult NumberApp()
    {
        IterApp model = new IterApp();
        return View();
    }

    [HttpPost]
    public ActionResult NumberAppResults(IterApp ia)
    {
        //You might need to move this around to where it's appropriate, 
        //but this will return the name of the month for the int value
        //that you receive. The if/else you have should be unnecessary.

        ia.MonthName = System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.GetMonthName(ia.CurrentMonth);
        return View(ia);
    }

基本上 - 只需将 MonthName 属性添加到类中，然后在返回 View 之前使用 DateTimeFormat.GetMonthName() 函数设置该值。

您还需要更新 View 以使用 @Model.MonthName 来显示结果。