55 lines
2.7 KiB
C#
55 lines
2.7 KiB
C#
namespace System.Web.Mvc.Html {
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.Linq;
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using System.Linq.Expressions;
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public static class LabelExtensions {
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public static MvcHtmlString Label(this HtmlHelper html, string expression) {
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return Label(html,
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expression,
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null);
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}
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public static MvcHtmlString Label(this HtmlHelper html, string expression, string labelText) {
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return LabelHelper(html,
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ModelMetadata.FromStringExpression(expression, html.ViewData),
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expression,
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labelText);
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}
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[SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "This is an appropriate nesting of generic types")]
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public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression) {
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return LabelFor<TModel, TValue>(html, expression, null);
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}
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[SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "This is an appropriate nesting of generic types")]
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public static MvcHtmlString LabelFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, string labelText) {
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return LabelHelper(html,
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ModelMetadata.FromLambdaExpression(expression, html.ViewData),
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ExpressionHelper.GetExpressionText(expression),
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labelText);
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}
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public static MvcHtmlString LabelForModel(this HtmlHelper html) {
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return LabelForModel(html, null);
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}
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public static MvcHtmlString LabelForModel(this HtmlHelper html, string labelText) {
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return LabelHelper(html, html.ViewData.ModelMetadata, String.Empty, labelText);
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}
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internal static MvcHtmlString LabelHelper(HtmlHelper html, ModelMetadata metadata, string htmlFieldName, string labelText = null) {
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string resolvedLabelText = labelText ?? metadata.DisplayName ?? metadata.PropertyName ?? htmlFieldName.Split('.').Last();
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if (String.IsNullOrEmpty(resolvedLabelText)) {
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return MvcHtmlString.Empty;
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}
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TagBuilder tag = new TagBuilder("label");
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tag.Attributes.Add("for", TagBuilder.CreateSanitizedId(html.ViewContext.ViewData.TemplateInfo.GetFullHtmlFieldName(htmlFieldName)));
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tag.SetInnerText(resolvedLabelText);
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return tag.ToMvcHtmlString(TagRenderMode.Normal);
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}
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}
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}
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