将枚举传递给html.radiobuttonfor MVC3
将枚举传递给html.radiobuttonfor MVC3
提问于 2011-04-11 20:07:16
我有一个名为ActionStatus的枚举，它有两个可能的值open=0和closed =1
public enum ActionStatus
{
Open,
Closed
}我想在我的编辑和创建视图中构建单选按钮组，这些视图使用枚举来使用a)创建视图中的默认值和b)编辑视图中当前选定的选项填充单选按钮。
我需要一个扩展方法吗?有没有人已经创建了一个？
编辑:在下面Darins的回答之后，这是我的模型类
namespace Actioner.Models
{
[MetadataType(typeof(MeetingActionValidation))]
public class MeetingAction
{
[Key]
public int MeetingActionId { get; set; }
[Required]
[Display(Name = "Description")]
public string Description { get; set; }
[Required]
[Display(Name = "Review Date")]
public DateTime ReviewDate { get ;set; }
public int Status{ get; set; }
[ScaffoldColumn(false)]
public int MeetingId { get; set; }
//public virtual Meeting Meeting { get; set; }
//public virtual ICollection<User> Users { get; set; }
public virtual ICollection<ActionUpdate> ActionUpdates { get; set; }
public MeetingActionStatus ActionStatus { get; set; }
}
public enum MeetingActionStatus
{
Open,
Closed
}这是我的观点
@model Actioner.Models.MeetingAction
@using Actioner.Helpers
<div class="editor-label">
@Html.LabelFor(model => model.Description)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Description)
@Html.ValidationMessageFor(model => model.Description)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.ReviewDate)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.ReviewDate)
@Html.ValidationMessageFor(model => model.ReviewDate)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.Status)
</div>
<div class="editor-field">
@Html.RadioButtonForEnum(x => x.ActionStatus)
</div>这是我的create controller操作
public virtual ActionResult Create(int id)
{
var meetingAction = new MeetingAction
{
MeetingId = id,
ReviewDate = DateTime.Now.AddDays(7)
};
ViewBag.Title = "Create Action";
return View(meetingAction);
} 枚举在视图中显示得很好，但当前选定的选项不会保留到数据库中
回答 2
Stack Overflow用户
回答已采纳
发布于 2011-04-11 20:24:06
using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Web;
using System.Web.Mvc;
using System.Web.Mvc.Html;
namespace YourNamespace
{
public static class HtmlExtensions
{
public static MvcHtmlString RadioButtonForEnum<TModel, TProperty>(
this HtmlHelper<TModel> htmlHelper,
Expression<Func<TModel, TProperty>> expression
)
{
var metaData = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
var names = Enum.GetNames(metaData.ModelType);
var sb = new StringBuilder();
foreach (var name in names)
{
var id = string.Format(
"{0}_{1}_{2}",
htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix,
metaData.PropertyName,
name
);
var radio = htmlHelper.RadioButtonFor(expression, name, new { id = id }).ToHtmlString();
sb.AppendFormat(
"<label for=\"{0}\">{1}</label> {2}",
id,
HttpUtility.HtmlEncode(name),
radio
);
}
return MvcHtmlString.Create(sb.ToString());
}
}
} 您还可以对此帮助器方法强制使用generic constraint to an enum type。
然后：
型号：
public enum ActionStatus
{
Open,
Closed
}
public class MyViewModel
{
public ActionStatus Status { get; set; }
}控制器：
public class HomeController : Controller
{
public ActionResult Index()
{
return View(new MyViewModel
{
Status = ActionStatus.Closed
});
}
[HttpPost]
public ActionResult Index(MyViewModel model)
{
return View(model);
}
}查看：
@model MyViewModel
@using (Html.BeginForm())
{
@Html.RadioButtonForEnum(x => x.Status)
<input type="submit" value="OK" />
}Stack Overflow用户
发布于 2012-03-02 04:50:55
只需为单选按钮添加标签
public static class HtmlExtensions
{
public static MvcHtmlString RadioButtonForEnum<TModel, TProperty>(
this HtmlHelper<TModel> htmlHelper,
Expression<Func<TModel, TProperty>> expression
)
{
var metaData = ModelMetadata.FromLambdaExpression(expression, htmlHelper.ViewData);
var names = Enum.GetNames(metaData.ModelType);
var sb = new StringBuilder();
foreach (var name in names)
{
var description = name;
var memInfo = metaData.ModelType.GetMember(name);
if (memInfo != null)
{
var attributes = memInfo[0].GetCustomAttributes(typeof(DisplayAttribute), false);
if (attributes != null && attributes.Length > 0 )
description = ((DisplayAttribute)attributes[0]).Name;
}
var id = string.Format(
"{0}_{1}_{2}",
htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix,
metaData.PropertyName,
name
);
var radio = htmlHelper.RadioButtonFor(expression, name, new { id = id }).ToHtmlString();
sb.AppendFormat(
"<label for=\"{0}\">{1}</label> {2}",
id,
HttpUtility.HtmlEncode(description),
radio
);
}
return MvcHtmlString.Create(sb.ToString());
}
}和模型：
public enum MeetingActionStatus
{
[Display(Name = "Open meeting")]
Open,
[Display(Name = "Closed meeting")]
Closed
} 页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/5621013
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