全部早上
我可以看到这已经在其他地方讨论过,但是想知道如果有什么改变或者事情在MVC 4中比较简单,像我这样的单纯形？
脚本
我有以下,编辑,型号：
public class CorporateDetails
{
public Guid? Id { get; set; }
[Key]
public int CorporateDetailId { get; set; }
public int? EmsId { get; set; }
public string EmsName { get; set; }
public virtual EmsType EmsType { get; set; }
}
public class EmsType
{
[Key]
public int? EmsId { get; set; }
public string EmsName { get; set; }
public virtual ICollection<EmsType> EmsTypes { get; set; }
}
使用以下标准创建视图：
<fieldset>
<legend>CorporateDetails</legend>
<div class="editor-label">
@Html.LabelFor(model => model.EmsId,"EmsType")
</div>
<div class="editor-field">
@Html.DropDownList("EmsId",String.Empty)
@Html.ValidationMessageFor(model => model.EmsId)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.EmsName)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.EmsName)
@Html.ValidationMessageFor(model => model.EmsName)
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
这给我开箱即用的一个美丽的下拉列表la Scott Gu’s blog
现在我真正的问题是这个 – 如何有效地将这个下拉框转换成什么将有效地成为一个多选,复选框列表？
再次,道歉过去,但我正在测试水,看是否有任何更新发生.
请注意,第一个MVC项目轻轻地走了,我又感觉很厚了：'(
解决方法
好的,我已经把它排序了 – hurray！从评论中可以看出,有一些问题出现,但请在下面找到完整的解决方案：D
模型
public class CorporateDetails
{
public Guid? Id { get; set; }
[Key]
public int CorporateDetailId { get; set; }
public int[] EmsId { get; set; }
}
public class EmsType
{
[Key]
public int EmsId { get; set; }
public string EmsName { get; set; }
public virtual ICollection<EmsType> EmsTypes { get; set; }
}
调节器
public ActionResult Create()
{
CorporateDetails corporatedetails = new CorporateDetails();
ViewBag.EmsId = new MultiSelectList(db.EmsTypes,"EmsId","EmsName");
return View(corporatedetails);
}
扩展(放置在项目根目录中的文件夹中)
public static MvcHtmlString CheckBoxListFor<TModel,TProperty>(this HtmlHelper<TModel> htmlHelper,Expression<Func<TModel,TProperty[]>> expression,MultiSelectList multiSelectList,object htmlAttributes = null) { //Derive property name for checkBox name MemberExpression body = expression.Body as MemberExpression; string propertyName = body.Member.Name; //Get currently select values from the ViewData model TProperty[] list = expression.Compile().Invoke(htmlHelper.ViewData.Model); //Convert selected value list to a List<string> for easy manipulation List<string> selectedValues = new List<string>(); if (list != null) { selectedValues = new List<TProperty>(list).ConvertAll<string>(delegate(TProperty i) { return i.ToString(); }); } //Create div TagBuilder divTag = new TagBuilder("div"); divTag.MergeAttributes(new RouteValueDictionary(htmlAttributes),true); //Add checkBoxes foreach (SelectListItem item in multiSelectList) { divTag.InnerHtml += String.Format("<div><input type=\"checkBox\" name=\"{0}\" id=\"{0}_{1}\" " + "value=\"{1}\" {2} /><label for=\"{0}_{1}\">{3}</label></div>",propertyName,item.Value,selectedValues.Contains(item.Value) ? "checked=\"checked\"" : "",item.Text); } return MvcHtmlString.Create(divTag.ToString()); }
扩展名注册在视图的Web配置中
<pages pageBaseType="System.Web.Mvc.WebViewPage">
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespace="System.Web.Mvc.Html" />
<add namespace="System.Web.Optimization"/>
<add namespace="System.Web.Routing" />
<add namespace="MyProject.Extensions" />
</namespaces>
</pages>
视图
@model Valpak.Websites.HealthChecker.Models.CorporateDetails
@{
ViewBag.Title = "Create";
}
<h2>Create</h2>
@using (Html.BeginForm())
{
@Html.ValidationSummary(true)
<fieldset>
<legend>CorporateDetails</legend>
<div class="editor-label">
@Html.CheckBoxListFor(model => model.EmsId,(MultiSelectList) ViewBag.EmsId)
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
<div>
@Html.ActionLink("Back to List","Index")
</div>
@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
}
这给我一个可爱的复选框列表.欢呼！
感谢Darin你的帮助,我已经把这个标记为答案,但是你的时间和精力是50.
