1 /* ****************************************************************************
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3 * Copyright (c) Microsoft Corporation. All rights reserved.
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5 * This software is subject to the Microsoft Public License (Ms-PL).
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6 * A copy of the license can be found in the license.htm file included
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7 * in this distribution.
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9 * You must not remove this notice, or any other, from this software.
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11 * ***************************************************************************/
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13 namespace System.Web.Mvc {
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15 using System.Collections.Generic;
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16 using System.ComponentModel;
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17 using System.ComponentModel.DataAnnotations;
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20 public class DataAnnotationsModelMetadataProvider : AssociatedMetadataProvider {
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21 protected override ModelMetadata CreateMetadata(IEnumerable<Attribute> attributes, Type containerType, Func<object> modelAccessor, Type modelType, string propertyName) {
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22 List<Attribute> attributeList = new List<Attribute>(attributes);
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23 DisplayColumnAttribute displayColumnAttribute = attributeList.OfType<DisplayColumnAttribute>().FirstOrDefault();
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24 DataAnnotationsModelMetadata result = new DataAnnotationsModelMetadata(this, containerType, modelAccessor, modelType, propertyName, displayColumnAttribute);
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26 // Do [HiddenInput] before [UIHint], so you can override the template hint
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27 HiddenInputAttribute hiddenInputAttribute = attributeList.OfType<HiddenInputAttribute>().FirstOrDefault();
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28 if (hiddenInputAttribute != null) {
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29 result.TemplateHint = "HiddenInput";
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30 result.HideSurroundingHtml = !hiddenInputAttribute.DisplayValue;
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33 // We prefer [UIHint("...", PresentationLayer = "MVC")] but will fall back to [UIHint("...")]
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34 IEnumerable<UIHintAttribute> uiHintAttributes = attributeList.OfType<UIHintAttribute>();
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35 UIHintAttribute uiHintAttribute = uiHintAttributes.FirstOrDefault(a => String.Equals(a.PresentationLayer, "MVC", StringComparison.OrdinalIgnoreCase))
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36 ?? uiHintAttributes.FirstOrDefault(a => String.IsNullOrEmpty(a.PresentationLayer));
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37 if (uiHintAttribute != null) {
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38 result.TemplateHint = uiHintAttribute.UIHint;
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41 DataTypeAttribute dataTypeAttribute = attributeList.OfType<DataTypeAttribute>().FirstOrDefault();
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42 if (dataTypeAttribute != null) {
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43 result.DataTypeName = dataTypeAttribute.GetDataTypeName();
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46 ReadOnlyAttribute readOnlyAttribute = attributeList.OfType<ReadOnlyAttribute>().FirstOrDefault();
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47 if (readOnlyAttribute != null) {
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48 result.IsReadOnly = readOnlyAttribute.IsReadOnly;
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51 DisplayFormatAttribute displayFormatAttribute = attributeList.OfType<DisplayFormatAttribute>().FirstOrDefault();
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52 if (displayFormatAttribute == null && dataTypeAttribute != null) {
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53 displayFormatAttribute = dataTypeAttribute.DisplayFormat;
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55 if (displayFormatAttribute != null) {
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56 result.NullDisplayText = displayFormatAttribute.NullDisplayText;
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57 result.DisplayFormatString = displayFormatAttribute.DataFormatString;
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58 result.ConvertEmptyStringToNull = displayFormatAttribute.ConvertEmptyStringToNull;
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60 if (displayFormatAttribute.ApplyFormatInEditMode) {
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61 result.EditFormatString = displayFormatAttribute.DataFormatString;
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65 ScaffoldColumnAttribute scaffoldColumnAttribute = attributeList.OfType<ScaffoldColumnAttribute>().FirstOrDefault();
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66 if (scaffoldColumnAttribute != null) {
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67 result.ShowForDisplay = result.ShowForEdit = scaffoldColumnAttribute.Scaffold;
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70 DisplayNameAttribute displayNameAttribute = attributeList.OfType<DisplayNameAttribute>().FirstOrDefault();
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71 if (displayNameAttribute != null) {
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72 result.DisplayName = displayNameAttribute.DisplayName;
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75 RequiredAttribute requiredAttribute = attributeList.OfType<RequiredAttribute>().FirstOrDefault();
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76 if (requiredAttribute != null) {
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77 result.IsRequired = true;
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