1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
// Copyright (c) Microsoft Corporation. All rights reserved. See License.txt in the project root for license information.
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using System.Linq.Expressions;
namespace System.Web.Mvc.Html
{
public static class DisplayNameExtensions
{
public static MvcHtmlString DisplayName(this HtmlHelper html, string expression)
{
return DisplayNameInternal(html, expression, metadataProvider: null);
}
internal static MvcHtmlString DisplayNameInternal(this HtmlHelper html, string expression, ModelMetadataProvider metadataProvider)
{
return DisplayNameHelper(ModelMetadata.FromStringExpression(expression, html.ViewData, metadataProvider),
expression);
}
[SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "This is an appropriate nesting of generic types")]
public static MvcHtmlString DisplayNameFor<TModel, TValue>(this HtmlHelper<IEnumerable<TModel>> html, Expression<Func<TModel, TValue>> expression)
{
return DisplayNameForInternal(html, expression, metadataProvider: null);
}
[SuppressMessage("Microsoft.Usage", "CA1801:ReviewUnusedParameters", Justification = "This is an extension method")]
internal static MvcHtmlString DisplayNameForInternal<TModel, TValue>(this HtmlHelper<IEnumerable<TModel>> html, Expression<Func<TModel, TValue>> expression, ModelMetadataProvider metadataProvider)
{
return DisplayNameHelper(ModelMetadata.FromLambdaExpression(expression, new ViewDataDictionary<TModel>(), metadataProvider),
ExpressionHelper.GetExpressionText(expression));
}
[SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures", Justification = "This is an appropriate nesting of generic types")]
public static MvcHtmlString DisplayNameFor<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression)
{
return DisplayNameForInternal(html, expression, metadataProvider: null);
}
internal static MvcHtmlString DisplayNameForInternal<TModel, TValue>(this HtmlHelper<TModel> html, Expression<Func<TModel, TValue>> expression, ModelMetadataProvider metadataProvider)
{
return DisplayNameHelper(ModelMetadata.FromLambdaExpression(expression, html.ViewData, metadataProvider),
ExpressionHelper.GetExpressionText(expression));
}
public static MvcHtmlString DisplayNameForModel(this HtmlHelper html)
{
return DisplayNameHelper(html.ViewData.ModelMetadata, String.Empty);
}
internal static MvcHtmlString DisplayNameHelper(ModelMetadata metadata, string htmlFieldName)
{
// We don't call ModelMetadata.GetDisplayName here because we want to fall back to the field name rather than the ModelType.
// This is similar to how the LabelHelpers get the text of a label.
string resolvedDisplayName = metadata.DisplayName ?? metadata.PropertyName ?? htmlFieldName.Split('.').Last();
return new MvcHtmlString(HttpUtility.HtmlEncode(resolvedDisplayName));
}
}
}
|
