84 lines
4.4 KiB
C#
84 lines
4.4 KiB
C#
/* ****************************************************************************
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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* This software is subject to the Microsoft Public License (Ms-PL).
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* A copy of the license can be found in the license.htm file included
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* in this distribution.
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*
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* You must not remove this notice, or any other, from this software.
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*
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* ***************************************************************************/
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namespace System.Web.Mvc {
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.ComponentModel.DataAnnotations;
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using System.Linq;
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public class DataAnnotationsModelMetadataProvider : AssociatedMetadataProvider {
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protected override ModelMetadata CreateMetadata(IEnumerable<Attribute> attributes, Type containerType, Func<object> modelAccessor, Type modelType, string propertyName) {
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List<Attribute> attributeList = new List<Attribute>(attributes);
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DisplayColumnAttribute displayColumnAttribute = attributeList.OfType<DisplayColumnAttribute>().FirstOrDefault();
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DataAnnotationsModelMetadata result = new DataAnnotationsModelMetadata(this, containerType, modelAccessor, modelType, propertyName, displayColumnAttribute);
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// Do [HiddenInput] before [UIHint], so you can override the template hint
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HiddenInputAttribute hiddenInputAttribute = attributeList.OfType<HiddenInputAttribute>().FirstOrDefault();
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if (hiddenInputAttribute != null) {
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result.TemplateHint = "HiddenInput";
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result.HideSurroundingHtml = !hiddenInputAttribute.DisplayValue;
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}
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// We prefer [UIHint("...", PresentationLayer = "MVC")] but will fall back to [UIHint("...")]
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IEnumerable<UIHintAttribute> uiHintAttributes = attributeList.OfType<UIHintAttribute>();
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UIHintAttribute uiHintAttribute = uiHintAttributes.FirstOrDefault(a => String.Equals(a.PresentationLayer, "MVC", StringComparison.OrdinalIgnoreCase))
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?? uiHintAttributes.FirstOrDefault(a => String.IsNullOrEmpty(a.PresentationLayer));
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if (uiHintAttribute != null) {
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result.TemplateHint = uiHintAttribute.UIHint;
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}
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DataTypeAttribute dataTypeAttribute = attributeList.OfType<DataTypeAttribute>().FirstOrDefault();
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if (dataTypeAttribute != null) {
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result.DataTypeName = dataTypeAttribute.GetDataTypeName();
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}
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ReadOnlyAttribute readOnlyAttribute = attributeList.OfType<ReadOnlyAttribute>().FirstOrDefault();
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if (readOnlyAttribute != null) {
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result.IsReadOnly = readOnlyAttribute.IsReadOnly;
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}
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DisplayFormatAttribute displayFormatAttribute = attributeList.OfType<DisplayFormatAttribute>().FirstOrDefault();
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if (displayFormatAttribute == null && dataTypeAttribute != null) {
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displayFormatAttribute = dataTypeAttribute.DisplayFormat;
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}
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if (displayFormatAttribute != null) {
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result.NullDisplayText = displayFormatAttribute.NullDisplayText;
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result.DisplayFormatString = displayFormatAttribute.DataFormatString;
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result.ConvertEmptyStringToNull = displayFormatAttribute.ConvertEmptyStringToNull;
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if (displayFormatAttribute.ApplyFormatInEditMode) {
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result.EditFormatString = displayFormatAttribute.DataFormatString;
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}
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}
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ScaffoldColumnAttribute scaffoldColumnAttribute = attributeList.OfType<ScaffoldColumnAttribute>().FirstOrDefault();
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if (scaffoldColumnAttribute != null) {
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result.ShowForDisplay = result.ShowForEdit = scaffoldColumnAttribute.Scaffold;
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}
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DisplayNameAttribute displayNameAttribute = attributeList.OfType<DisplayNameAttribute>().FirstOrDefault();
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if (displayNameAttribute != null) {
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result.DisplayName = displayNameAttribute.DisplayName;
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}
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RequiredAttribute requiredAttribute = attributeList.OfType<RequiredAttribute>().FirstOrDefault();
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if (requiredAttribute != null) {
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result.IsRequired = true;
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}
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return result;
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}
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}
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}
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