Question

我直截了当地说到这一点。

我试图显示Monthly Income只有2位小数。

我已尝试使用DisplayFormat但是当我在文本框中添加它时，它无法正常工作。

模型

public class AgentModel
{

    [Display(Name = "Monthly Income")]
    [DisplayFormat(DataFormatString = "{0:0.00}", ApplyFormatInEditMode = true)]
    public decimal MonthlyIncome { get; set; }
}

查看

//this input display the two decimal
@Html.EditorFor(m => m.MonthlyIncome, new { htmlAttributes = new { @class = "form-control" } })

//this one display 5 decimal
@Html.TextBoxFor(m => m.MonthlyIncome, new { @class = "form-control"})

我很困惑这两个输入之间有什么区别。我使用DataFormat因为我希望格式集中在我的模型上。并且不使用此代码@string.Format("{0:N2}",decimal.Round(agent.MonthlyIncome, 2, MidpointRounding.AwayFromZero))来限制小数位。因为如果我这样做，我会在所有观点中这样做。

我还尝试输出monthly income

的值

<td>@agent.MonthlyIncome</td>

这仍然会返回5位小数。

Answer 1

要使用<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <body> <div> <h2>Div containing UL</h2> <ul> <li data-src="http://bhuck.com/svg/layers.svg" style="list-style-image: url(http://bhuck.com/svg/layers.svg)">List with</li> <li data-src="http://bhuck.com/svg/server.svg" style="list-style-image: url(http://bhuck.com/svg/server.svg)">style images</li> <li data-src="http://bhuck.com/svg/share.svg" style="list-style-image: url(http://bhuck.com/svg/share.svg)">to be used as source</li> <li data-src="http://bhuck.com/svg/stack.svg" style="list-style-image: url(http://bhuck.com/svg/stack.svg)">when hovered over</li> </ul> </div> <div class="appear"> <h2>Div to have images appear on</h2> <img src="http://bhuck.com/svg/share.svg" height="48" width="48"> <p>Willing to use an img element if necessary</p> </div> </body>显示格式化值，请使用this overload

TextBoxFor()

第二个参数是格式字符串。请注意，@Html.TextBoxFor(m => m.MonthlyIncome, "{0:0.00}", new { @class = "form-control"})仅在使用DisplayFormatAttribute或EditorFor()

时受到尊重

另请注意，DisplayFor()将使用正确的格式呈现值。

Answer 2

DisplayFormat仅适用于EditorFor/DisplayFor。看看this小提琴为mvc。

<强>模型

使用System; 使用System.ComponentModel.DataAnnotations;

namespace HelloWorldMvcApp
{
    public class SampleViewModel
    {
        [Required]
        [MinLength(10)]
        [MaxLength(100)]
        [Display(Name = "Ask Magic 8 Ball any question:")]
        public string Question { get; set; }

        [DisplayFormat(DataFormatString = "{0:0.00}", ApplyFormatInEditMode = true)]
        public decimal MonthlyIncome { get; set; }

        //See here for list of answers
        public string Answer { get; set; }
    }
}

<强>控制器

using System;
using System.Web.Mvc;
using System.Collections.Generic;

namespace HelloWorldMvcApp
{
    public class HomeController : Controller
    {
        [HttpGet]
        public ActionResult Index()
        {
            var s = new SampleViewModel();
            s.MonthlyIncome = 1000;
            return View(s);
        }


        [HttpPost]
        public JsonResult GetAnswer(string question)
        {               
            int index = _rnd.Next(_db.Count);
            var answer = _db[index];
            return Json(answer);
        }

        private static Random _rnd = new Random();

        private static List<string> _db = new List<string> { "Yes", "No", "Definitely, yes", "I don't know", "Looks like, yes"} ;
    }
}

查看

@model HelloWorldMvcApp.SampleViewModel @{ Layout = null; } <!DOCTYPE html>  <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Bootstrap 101 Template</title>  <link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css"> <style type="text/css"> .field-validation-error { color: #ff0000; } </style> </head> <body> <div class="container"> <div class="col-md-6 col-md-offset-3"> <h1>Hello Stranger</h1> @using (Html.BeginForm()) { <div class="form-group"> @Html.LabelFor(m => m.Question) @Html.TextBoxFor(model => model.Question, new {@class="form-control"}) @Html.ValidationMessageFor(model => model.Question) </div> @Html.DisplayFor(m => m.MonthlyIncome) <button type="button" class="btn btn-success submit">Ask</button> } <br/><br/> <div class="alert alert-warning fade"> <img src="http://entechprod.blob.core.windows.net/dotnetfiddle/morpheus.jpg" style="max-width:100%;"/><br/><br/> <strong><span class="alert-content"></span></strong> </div> </div> </div>  <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script> <script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script> <script src="//ajax.aspnetcdn.com/ajax/jquery.validate/1.11.1/jquery.validate.min.js"></script> <script src="//ajax.aspnetcdn.com/ajax/mvc/4.0/jquery.validate.unobtrusive.min.js"></script> <script type="text/javascript"> function openAlert(txt) { $('.alert-content').text(txt); $('.alert').addClass('in'); } function closeAlert() { $('.alert').removeClass('in'); } $(function(){ var answer = '@Model.Answer'; if(answer && answer != '') openAlert(answer); $('#Question').change(closeAlert); $('#Question').keyup(closeAlert); $('.submit').click(function(){ if($('form').valid()) { $.ajax({ url: '@Url.RouteUrl(new{ action="GetAnswer", controller="Home"})', data: {Answer: '', Question: $('#Question').val()}, type: 'POST', dataType: 'json', contentType: "application/json; charset=utf-8", success: function(resp) { openAlert(resp); }}); } else { closeAlert(); } }); }); </script> </body> </html>

ASP.NET MVC C＃DisplayFormat问题

2 个答案: