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mvc3 中的十进制错误 - 该值对字段无效
[英] error with decimal in mvc3 - the value is not valid for field
本文介绍了mvc3 中的十进制错误 - 该值对字段无效的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在关注 [ASP.NET MVC 3 入门][1].而且我无法添加/编辑 Price = 9.99 或 9,99 的值.它说:价值‘9.99’对价格无效."和价格字段必须是数字."
如何解决这个问题?
型号:
公共类电影{公共 int ID { 获取；放;}公共字符串标题{获取；放;}公共日期时间发布日期{获取；放;}公共字符串流派{获取；放;}公共十进制价格{得到；放;}}公共类 MovieDbContext : DbContext{公共数据库集<电影>电影 { 得到;放;}}
控制器:
public class MovieController : Controller{private MovieDbContext db = new MovieDbContext();////获取:/电影/公共视图结果索引(){var 电影 = 来自 db.Movies 中的 m其中 m.ReleaseDate >新日期时间(1984, 6, 1)选择 m;返回视图(电影.ToList())；}////获取:/电影/详细信息/5公共视图结果详细信息(int id){电影电影 = db.Movies.Find(id);返回视图(电影)；}////获取:/电影/创建公共 ActionResult 创建(){返回视图()；}////发布:/电影/创建[HttpPost]公共 ActionResult 创建(电影电影){如果(模型状态.IsValid){db.Movies.Add(电影);db.SaveChanges();return RedirectToAction("索引");}返回视图(电影)；}////获取:/电影/编辑/5公共操作结果编辑(int id){电影电影 = db.Movies.Find(id);返回视图(电影)；}////发布:/电影/编辑/5[HttpPost]公共动作结果编辑(电影电影){如果(模型状态.IsValid){db.Entry(movie).State = EntityState.Modified;db.SaveChanges();return RedirectToAction("索引");}返回视图(电影)；}////获取:/电影/删除/5公共操作结果删除(int id){电影电影 = db.Movies.Find(id);返回视图(电影)；}////发布:/电影/删除/5[HttpPost, ActionName("删除")]公共 ActionResult DeleteConfirmed(int id){电影电影 = db.Movies.Find(id);db.Movies.Remove(电影);db.SaveChanges();return RedirectToAction("索引");}受保护的覆盖无效处置(布尔处置){db.Dispose();base.Dispose(处置)；}}}
查看:
@model MvcMovies.Models.Movie@{ViewBag.Title = "创建";}<h2>创建</h2><script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"><script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>@using (Html.BeginForm()) {@Html.ValidationSummary(true)<字段集><legend>电影</legend><div class="editor-label">@Html.LabelFor(model => model.Title)
<div class="editor-field">@Html.EditorFor(model => model.Title)@Html.ValidationMessageFor(model =>model.Title)
<div class="editor-label">@Html.LabelFor(model => model.ReleaseDate)
<div class="editor-field">@Html.EditorFor(model => model.ReleaseDate)@Html.ValidationMessageFor(model =>model.ReleaseDate)
<div class="editor-label">@Html.LabelFor(model => model.Genre)
<div class="editor-field">@Html.EditorFor(model => model.Genre)@Html.ValidationMessageFor(model => model.Genre)
<div class="editor-label">@Html.LabelFor(model =>model.Price)
<div class="editor-field">@Html.EditorFor(model => model.Price)@Html.ValidationMessageFor(model =>model.Price)
<p><输入类型=提交"值=创建"/></p></fieldset>}<div>@Html.ActionLink("返回列表", "索引")
公共数据库集<电影>电影 { 得到;放;}}
解决方案
2 年后我再次偶然发现了这个问题.我认为 ASP.NET MVC 5 已经解决了这个问题，但看起来并非如此.所以这里是如何解决问题...
创建一个名为 DecimalModelBinder 的类，如下所示，并将其添加到项目的根目录中，例如:
使用系统；使用 System.Globalization；使用 System.Web.Mvc;命名空间 你的命名空间{公共类 DecimalModelBinder : IModelBinder{公共对象 BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext){ValueProviderResult valueResult = bindingContext.ValueProvider.GetValue(bindingContext.ModelName);ModelState modelState = new ModelState { Value = valueResult };对象实际值 = 空；if(valueResult.AttemptedValue != string.Empty){尝试{实际值 = Convert.ToDecimal(valueResult.AttemptedValue, CultureInfo.CurrentCulture);}捕获(格式异常 e){modelState.Errors.Add(e);}}bindingContext.ModelState.Add(bindingContext.ModelName, modelState);返回实际值；}}}
在 Global.asax.cs, 中像这样在 Application_Start() 中使用它:
ModelBinders.Binders.Add(typeof(decimal?), new DecimalModelBinder());
I'm following [Getting started with ASP.NET MVC 3][1]. And I can't add/edit with value of Price = 9.99 or 9,99. It said: "The value '9.99' is not valid for Price." and "The field Price must be a number."
How to fix this?
Model:
public class Movie
{
public int ID { get; set; }
public string Title { get; set; }
public DateTime ReleaseDate { get; set; }
public string Genre { get; set; }
public decimal Price { get; set; }
}
public class MovieDbContext : DbContext
{
public DbSet<Movie> Movies { get; set; }
}
Controller:
public class MovieController : Controller
{
private MovieDbContext db = new MovieDbContext();
//
// GET: /Movie/
public ViewResult Index()
{
var movie = from m in db.Movies
where m.ReleaseDate > new DateTime(1984, 6, 1)
select m;
return View(movie.ToList());
}
//
// GET: /Movie/Details/5
public ViewResult Details(int id)
{
Movie movie = db.Movies.Find(id);
return View(movie);
}
//
// GET: /Movie/Create
public ActionResult Create()
{
return View();
}
//
// POST: /Movie/Create
[HttpPost]
public ActionResult Create(Movie movie)
{
if (ModelState.IsValid)
{
db.Movies.Add(movie);
db.SaveChanges();
return RedirectToAction("Index");
}
return View(movie);
}
//
// GET: /Movie/Edit/5
public ActionResult Edit(int id)
{
Movie movie = db.Movies.Find(id);
return View(movie);
}
//
// POST: /Movie/Edit/5
[HttpPost]
public ActionResult Edit(Movie movie)
{
if (ModelState.IsValid)
{
db.Entry(movie).State = EntityState.Modified;
db.SaveChanges();
return RedirectToAction("Index");
}
return View(movie);
}
//
// GET: /Movie/Delete/5
public ActionResult Delete(int id)
{
Movie movie = db.Movies.Find(id);
return View(movie);
}
//
// POST: /Movie/Delete/5
[HttpPost, ActionName("Delete")]
public ActionResult DeleteConfirmed(int id)
{
Movie movie = db.Movies.Find(id);
db.Movies.Remove(movie);
db.SaveChanges();
return RedirectToAction("Index");
}
protected override void Dispose(bool disposing)
{
db.Dispose();
base.Dispose(disposing);
}
}
}
View:
@model MvcMovies.Models.Movie
@{
ViewBag.Title = "Create";
}
<h2>Create</h2>
<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"> </script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>
@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
<legend>Movie</legend>
<div class="editor-label">
@Html.LabelFor(model => model.Title)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Title)
@Html.ValidationMessageFor(model => model.Title)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.ReleaseDate)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.ReleaseDate)
@Html.ValidationMessageFor(model => model.ReleaseDate)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Genre)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Genre)
@Html.ValidationMessageFor(model => model.Genre)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Price)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Price)
@Html.ValidationMessageFor(model => model.Price)
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
<div>
@Html.ActionLink("Back to List", "Index")
</div>
public DbSet<Movie> Movies { get; set; }
}
解决方案
I just stumbled on this again after 2 years. I thought ASP.NET MVC 5 had solved this but looks like it's not the case. So here goes how to solve the problem...
Create a class called DecimalModelBinder like the following and add it to the root of your project for example:
using System;
using System.Globalization;
using System.Web.Mvc;
namespace YourNamespace
{
public class DecimalModelBinder : IModelBinder
{
public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
ValueProviderResult valueResult = bindingContext.ValueProvider
.GetValue(bindingContext.ModelName);
ModelState modelState = new ModelState { Value = valueResult };
object actualValue = null;
if(valueResult.AttemptedValue != string.Empty)
{
try
{
actualValue = Convert.ToDecimal(valueResult.AttemptedValue, CultureInfo.CurrentCulture);
}
catch(FormatException e)
{
modelState.Errors.Add(e);
}
}
bindingContext.ModelState.Add(bindingContext.ModelName, modelState);
return actualValue;
}
}
}
Inside Global.asax.cs, make use of it in Application_Start() like this:
ModelBinders.Binders.Add(typeof(decimal?), new DecimalModelBinder());
这篇关于mvc3 中的十进制错误 - 该值对字段无效的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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