我怎么能覆盖@ Html.LabelFor模板? [英] How can I override the @Html.LabelFor template?
问题描述
我有一个简单的现场形式
< DIV CLASS =字段褪色标签>
@ Html.LabelFor(型号=> model.Register.UserName)
@ Html.TextBoxFor(型号=> model.Register.UserName)
< / DIV>
和这导致:
< DIV CLASS =字段褪色标签>
<标签=Register_UserName>的用户名(用于识别所有的服务,从4到30个字符)LT; /标签>
<输入类型=文本值=NAME =Register.UserNameID =Register_UserName>
< / DIV>
但我想那 LabelFor
code追加<跨度>
里面,所以我可以结束了有:
<标签=Register_UserName>
&所述;跨度>用户名(用于识别的所有服务,从4至30个字符)LT /跨度>
< /标签>
我怎样才能做到这一点?
使用 EditorTemplates
但是这是一个 LabelFor
。
您会通过创建自己的HTML帮助做到这一点。
<一个href=\"http://www.asp.net/mvc/tutorials/creating-custom-html-helpers-cs\">http://www.asp.net/mvc/tutorials/creating-custom-html-helpers-cs
通过下载ASP.Net MVC源>和修改,作为一个自定义的帮手您可以查看code为LabelFor&LT。
答按添加 balexandre
公共静态类LabelExtensions
{
公共静态MvcHtmlString LabelFor&LT;的TModel,TValue&GT;(此的HtmlHelper&LT;的TModel&GT; HTML,防爆pression&LT; Func键&LT;的TModel,TValue&GT;&GT;前pression,对象htmlAttributes)
{
返回LabelFor(HTML,前pression,新RouteValueDictionary(htmlAttributes));
}
公共静态MvcHtmlString LabelFor&LT;的TModel,TValue&GT;(此的HtmlHelper&LT;的TModel&GT; HTML,防爆pression&LT; Func键&LT;的TModel,TValue&GT;&GT;前pression,IDictionary的&LT;字符串对象&gt; htmlAttributes)
{
ModelMetadata元= ModelMetadata.FromLambdaEx pression(如pression,html.ViewData);
字符串htmlFieldName =前pressionHelper.GetEx pressionText(如pression);
字符串LabelText的= metadata.DisplayName? metadata.PropertyName? htmlFieldName.Split('。')最后()。
如果(String.IsNullOrEmpty(LabelText的))
{
返回MvcHtmlString.Empty;
} TagBuilder标签=新TagBuilder(标签);
tag.MergeAttributes(htmlAttributes);
tag.Attributes.Add(代表,html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(htmlFieldName)); TagBuilder跨度=新TagBuilder(跨度);
span.SetInnerText(LabelText的); //分配&LT;跨度&GT;到&lt;标签&gt;内部HTML
tag.InnerHtml = span.ToString(TagRenderMode.Normal); 返回MvcHtmlString.Create(tag.ToString(TagRenderMode.Normal));
}
}
I have a simple field form
<div class="field fade-label">
@Html.LabelFor(model => model.Register.UserName)
@Html.TextBoxFor(model => model.Register.UserName)
</div>
and this results in:
<div class="field fade-label">
<label for="Register_UserName">Username (used to identify all services, from 4 to 30 chars)</label>
<input type="text" value="" name="Register.UserName" id="Register_UserName">
</div>
but I want that LabelFor
code append a <span>
inside so I can end up having:
<label for="Register_UserName">
<span>Username (used to identify all services, from 4 to 30 chars)</span>
</label>
How can I do this?
All examples use EditorTemplates
but this is a LabelFor
.
You'd do this by creating your own HTML helper.
http://www.asp.net/mvc/tutorials/creating-custom-html-helpers-cs
You can view the code for LabelFor<> by downloading the source for ASP.Net MVC and modify that as a custom helper.
Answer added by balexandre
public static class LabelExtensions
{
public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, object htmlAttributes)
{
return LabelFor(html, expression, new RouteValueDictionary(htmlAttributes));
}
public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, IDictionary<string, object> htmlAttributes)
{
ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, html.ViewData);
string htmlFieldName = ExpressionHelper.GetExpressionText(expression);
string labelText = metadata.DisplayName ?? metadata.PropertyName ?? htmlFieldName.Split('.').Last();
if (String.IsNullOrEmpty(labelText))
{
return MvcHtmlString.Empty;
}
TagBuilder tag = new TagBuilder("label");
tag.MergeAttributes(htmlAttributes);
tag.Attributes.Add("for", html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(htmlFieldName));
TagBuilder span = new TagBuilder("span");
span.SetInnerText(labelText);
// assign <span> to <label> inner html
tag.InnerHtml = span.ToString(TagRenderMode.Normal);
return MvcHtmlString.Create(tag.ToString(TagRenderMode.Normal));
}
}
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