签名必须是
public static MvcHtmlString FieldFor<TModel, TValue>(this HtmlHelper<TModel> helper, expression<Func<TModel, TValue>> expression)
然后，您可以结合使用TagBuilder和内置的html helper方法来生成html
using System;using System.Linq.expressions;using System.Text;using System.Web.Mvc;using System.Web.Mvc.Html;namespace YourAssembly.Html{ public static class FieldHelper { public static MvcHtmlString FieldFor<TModel, TValue>(this HtmlHelper<TModel> helper, expression<Func<TModel, TValue>> expression) { MvcHtmlString label = LabelExtensions.LabelFor(helper, expression, new { @class = "control-label col-md-2" }); MvcHtmlString editor = EditorExtensions.EditorFor(helper, expression, new { htmlAttributes = new {@class = "form-control"}}) MvcHtmlString validation = ValidationExtensions.ValidationMessageFor(helper, expression, null, new { @class = "text-danger" }); StringBuilder html = new StringBuilder(); html.Append(editor); html.Append(validation); TagBuilder innerDiv = new TagBuilder("div"); innerDiv.AddCssClass("col-md-10"); innerDiv.InnerHtml = html.ToString(); html = new StringBuilder(); html.Append(label); html.Append(innerDiv.ToString()); TagBuilder outerDiv = new TagBuilder("div"); outerDiv.AddCssClass("form-group"); outerDiv.InnerHtml = html.ToString(); return MvcHtmlString.Create(outerDiv.ToString()); } }}然后，您可以将其添加到所有视图中
web.config
<system.web.webPages.razor> <pages pagebaseType="System.Web.Mvc.WebViewPage"> <namespaces> <add namespace="System.Web.Mvc" /> .... <add namespace="YourAssembly.Html" /> </namespaces>
