通过枚举html.radiobuttonfor MVC3 [英] pass enum to html.radiobuttonfor MVC3
问题描述
我有一个枚举调用ActionStatus具有开放2可能值= 0和闭合= 1
公开枚举ActionStatus
{
打开,
关闭
}
我要建立在我的编辑单选按钮组,并创建一个使用枚举来填充单选按钮用)在创建视图的默认值的意见和b)在编辑视图中当前选定的选项。
我是否需要为这个扩展方法,并且已经有人已经创建了一个?
编辑:后低于这个Darins的回答是我的模型类
命名空间Actioner.Models
{
[MetadataType(typeof运算(MeetingActionValidation))]
公共类MeetingAction
{
[键]
公众诠释MeetingActionId {搞定;组; } [需要]
[显示(名称=说明)]
公共字符串描述{搞定;组; } [需要]
[显示(NAME =评审日期)]
公众的DateTime REVIEWDATE {获取;设置; } 公众诠释状态{搞定;组; } [ScaffoldColumn(假)]
公众诠释MeetingId {搞定;组; }
//公共虚拟会议会议{搞定;组; } //公共虚拟的ICollection<使用者>用户{搞定;组; }
公共虚拟的ICollection< ActionUpdate> ActionUpdates {搞定;组; } 公共MeetingActionStatus ActionStatus {搞定;组; }}公共枚举MeetingActionStatus
{
打开,
关闭
}
这是我的看法。
@model Actioner.Models.MeetingAction
@using Actioner.Helpers
< DIV CLASS =编辑标记>
@ Html.LabelFor(型号=> model.Description)
< / DIV>
< DIV CLASS =主编场>
@ Html.EditorFor(型号=> model.Description)
@ Html.ValidationMessageFor(型号=> model.Description)
< / DIV>< DIV CLASS =编辑标记>
@ Html.LabelFor(型号=> model.ReviewDate)
< / DIV>
< DIV CLASS =主编场>
@ Html.EditorFor(型号=> model.ReviewDate)
@ Html.ValidationMessageFor(型号=> model.ReviewDate)
< / DIV>< DIV CLASS =编辑标记>
@ Html.LabelFor(型号=> model.Status)
< / DIV>
< DIV CLASS =主编场> @ Html.RadioButtonForEnum(X => x.ActionStatus)< / DIV>
这是我创建控制器动作
公共虚拟的ActionResult创建(INT ID)
{ VAR meetingAction =新MeetingAction
{
MeetingId = ID,
REVIEWDATE = DateTime.Now.AddDays(7)
}; ViewBag.Title =创建行动; 返回查看(meetingAction);
}
枚举在视图中显示正常,但当前选定的选项未保存到数据库
使用系统;
使用System.Collections.Generic;
使用System.Linq的;
使用System.Linq.Ex pressions;
使用System.Text;
使用的System.Web;
使用System.Web.Mvc;
使用System.Web.Mvc.Html;命名空间YourNamespace
{
公共静态类HtmlExtensions
{
公共静态MvcHtmlString RadioButtonForEnum<的TModel,TProperty>(
这与的HtmlHelper LT;的TModel>的HtmlHelper,
防爆pression<&Func键LT;的TModel,TProperty>>前pression
)
{
VAR元= ModelMetadata.FromLambdaEx pression(如pression,htmlHelper.ViewData);
变种名称= Enum.GetNames(metaData.ModelType);
VAR SB =新的StringBuilder();
的foreach(在名称变量名称)
{
VAR ID =的String.Format(
{0} _ {1} _ {2},
htmlHelper.ViewData.TemplateInfo.HtmlField preFIX,
metaData.PropertyName,
名称
); VAR无线电= htmlHelper.RadioButtonFor(如pression,名称,新的{ID = ID})ToHtmlString()。
sb.AppendFormat(
<标签= \\{0} \\> {1}< /标签> {2},
ID,
HttpUtility.HtmlEn code(名称),
无线电
);
}
返回MvcHtmlString.Create(sb.ToString());
}
}
}
您也可以强制执行<一个href=\"http://msmvps.com/blogs/jon_skeet/archive/2009/09/10/generic-constraints-for-enums-and-delegates.aspx\">generic约束enum类型这个helper方法。
和则:
型号:
公开枚举ActionStatus
{
打开,
关闭
}公共类MyViewModel
{
公共ActionStatus状态{搞定;组; }
}
控制器:
公共类HomeController的:控制器
{
公众的ActionResult指数()
{
返回查看(新MyViewModel
{
状态= ActionStatus.Closed
});
} [HttpPost]
公众的ActionResult指数(MyViewModel模型)
{
返回查看(模型);
}
}
查看:
@model MyViewModel
@using(Html.BeginForm())
{
@ Html.RadioButtonForEnum(X =&GT; x.Status)
&LT;输入类型=提交VALUE =OK/&GT;
}
I Have an Enum Called ActionStatus that has 2 possible values open=0 and closed = 1
public enum ActionStatus
{
Open,
Closed
}
I want to build radio button group in my edit and create views that uses the enum to populate the radio buttons with a) a default value in the create view and b) the currently selected option in the edit view.
Do i need an extension method for this, and has anybody already created one?
EDIT: After Darins's answer below this is my Model class
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
}
and this is my view
@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>
And this is my create controller action
public virtual ActionResult Create(int id)
{
var meetingAction = new MeetingAction
{
MeetingId = id,
ReviewDate = DateTime.Now.AddDays(7)
};
ViewBag.Title = "Create Action";
return View(meetingAction);
}
The enum displays fine in the view, but the currently selected option is not persisted to the database
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());
}
}
}
You could also enforce a generic constraint to an enum type for this helper method.
and then:
Model:
public enum ActionStatus
{
Open,
Closed
}
public class MyViewModel
{
public ActionStatus Status { get; set; }
}
Controller:
public class HomeController : Controller
{
public ActionResult Index()
{
return View(new MyViewModel
{
Status = ActionStatus.Closed
});
}
[HttpPost]
public ActionResult Index(MyViewModel model)
{
return View(model);
}
}
View:
@model MyViewModel
@using (Html.BeginForm())
{
@Html.RadioButtonForEnum(x => x.Status)
<input type="submit" value="OK" />
}
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