我有一个简单的字段表单
<div class="field fade-label">
@Html.LabelFor(model => model.Register.UserName)
@Html.TextBoxFor(model => model.Register.UserName)
</div>
这样做的结果是:
<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>
但是我想让LabelFor
代码在里面附加一个<span>
,这样我就可以拥有:
<label for="Register_UserName">
<span>Username (used to identify all services, from 4 to 30 chars)</span>
</label>
我该怎么做?
所有examples都使用EditorTemplates
,但这是一个LabelFor
。
发布于 2011-03-05 00:16:32
您可以通过创建自己的HTML helper来实现这一点。
http://www.asp.net/mvc/tutorials/creating-custom-html-helpers-cs
您可以通过下载ASP.Net MVC的源代码来查看LabelFor<>的代码,并将其修改为自定义帮助器。
balexandre添加的Answer
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));
}
}
发布于 2014-05-11 01:20:25
我对balealexandre的回答进行了扩展,并添加了指定HTML以包括标签文本之前和之后的功能。我添加了一堆方法重载和注释。我希望这对大家有帮助!
还从这里抓取了信息:Html inside label using Html helper
namespace System.Web.Mvc.Html
{
public static class LabelExtensions
{
/// <summary>Creates a Label with custom Html before the label text. Only starting Html is provided.</summary>
/// <param name="startHtml">Html to preempt the label text.</param>
/// <returns>MVC Html for the Label</returns>
public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, Func<object, HelperResult> startHtml)
{
return LabelFor(html, expression, startHtml, null, new RouteValueDictionary("new {}"));
}
/// <summary>Creates a Label with custom Html before the label text. Starting Html and a single Html attribute is provided.</summary>
/// <param name="startHtml">Html to preempt the label text.</param>
/// <param name="htmlAttributes">A single Html attribute to include.</param>
/// <returns>MVC Html for the Label</returns>
public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, Func<object, HelperResult> startHtml, object htmlAttributes)
{
return LabelFor(html, expression, startHtml, null, new RouteValueDictionary(htmlAttributes));
}
/// <summary>Creates a Label with custom Html before the label text. Starting Html and a collection of Html attributes are provided.</summary>
/// <param name="startHtml">Html to preempt the label text.</param>
/// <param name="htmlAttributes">A collection of Html attributes to include.</param>
/// <returns>MVC Html for the Label</returns>
public static MvcHtmlString LabelFor<TModel, TProperty>(this HtmlHelper<TModel> html, Expression<Func<TModel, TProperty>> expression, Func<object, HelperResult> startHtml, IDictionary<string, object> htmlAttributes)
{
return LabelFor(html, expression, startHtml, null, htmlAttributes);
}
/// <summary>Creates a Label with custom Html before and after the label text. Starting Html and ending Html are provided.</summary>
/// <param name="startHtml">Html to preempt the label text.</param>
/// <param name="endHtml">Html to follow the label text.</param>
/// <returns>MVC Html for the Label</returns>
public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, Func<object, HelperResult> startHtml, Func<object, HelperResult> endHtml)
{
return LabelFor(html, expression, startHtml, endHtml, new RouteValueDictionary("new {}"));
}
/// <summary>Creates a Label with custom Html before and after the label text. Starting Html, ending Html, and a single Html attribute are provided.</summary>
/// <param name="startHtml">Html to preempt the label text.</param>
/// <param name="endHtml">Html to follow the label text.</param>
/// <param name="htmlAttributes">A single Html attribute to include.</param>
/// <returns>MVC Html for the Label</returns>
public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, Func<object, HelperResult> startHtml, Func<object, HelperResult> endHtml, object htmlAttributes)
{
return LabelFor(html, expression, startHtml, endHtml, new RouteValueDictionary(htmlAttributes));
}
/// <summary>Creates a Label with custom Html before and after the label text. Starting Html, ending Html, and a collection of Html attributes are provided.</summary>
/// <param name="startHtml">Html to preempt the label text.</param>
/// <param name="endHtml">Html to follow the label text.</param>
/// <param name="htmlAttributes">A collection of Html attributes to include.</param>
/// <returns>MVC Html for the Label</returns>
public static MvcHtmlString LabelFor<TModel, TProperty>(this HtmlHelper<TModel> html, Expression<Func<TModel, TProperty>> expression, Func<object, HelperResult> startHtml, Func<object, HelperResult> endHtml, IDictionary<string, object> htmlAttributes)
{
ModelMetadata metadata = ModelMetadata.FromLambdaExpression(expression, html.ViewData);
string htmlFieldName = ExpressionHelper.GetExpressionText(expression);
//Use the DisplayName or PropertyName for the metadata if available. Otherwise default to the htmlFieldName provided by the user.
string labelText = metadata.DisplayName ?? metadata.PropertyName ?? htmlFieldName.Split('.').Last();
if (String.IsNullOrEmpty(labelText))
{
return MvcHtmlString.Empty;
}
//Create the new label.
TagBuilder tag = new TagBuilder("label");
//Add the specified Html attributes
tag.MergeAttributes(htmlAttributes);
//Specify what property the label is tied to.
tag.Attributes.Add("for", html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldId(htmlFieldName));
//Run through the various iterations of null starting or ending Html text.
if (startHtml == null && endHtml == null) tag.InnerHtml = labelText;
else if (startHtml != null && endHtml == null) tag.InnerHtml = string.Format("{0}{1}", startHtml(null).ToHtmlString(), labelText);
else if (startHtml == null && endHtml != null) tag.InnerHtml = string.Format("{0}{1}", labelText, endHtml(null).ToHtmlString());
else tag.InnerHtml = string.Format("{0}{1}{2}", startHtml(null).ToHtmlString(), labelText, endHtml(null).ToHtmlString());
return MvcHtmlString.Create(tag.ToString());
}
}
}
发布于 2011-03-05 00:20:47
LabelFor是一个扩展方法(静态),因此不能被重写。您需要创建自己的Html Helper扩展方法来实现所需的功能。
https://stackoverflow.com/questions/5196290
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