103 lines
5.1 KiB
C#
103 lines
5.1 KiB
C#
namespace System.Web.ModelBinding {
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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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using System.Web.Globalization;
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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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#if UNDEF
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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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#endif
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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.ToDataTypeName();
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}
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EditableAttribute editable = attributes.OfType<EditableAttribute>().FirstOrDefault();
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if (editable != null) {
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result.IsReadOnly = !editable.AllowEdit;
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}
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else {
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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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}
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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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if (!displayFormatAttribute.HtmlEncode && String.IsNullOrWhiteSpace(result.DataTypeName)) {
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result.DataTypeName = DataTypeUtil.HtmlTypeName;
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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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DisplayAttribute display = attributes.OfType<DisplayAttribute>().FirstOrDefault();
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string name = null;
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if (display != null) {
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var displayAdapter = new DisplayAttributeAdapter(display);
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result.Description = displayAdapter.GetDescription();
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result.ShortDisplayName = displayAdapter.GetShortName();
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result.Watermark = displayAdapter.GetPrompt();
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result.Order = displayAdapter.GetOrder() ?? ModelMetadata.DefaultOrder;
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name = displayAdapter.GetName();
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}
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if (name != null) {
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result.DisplayName = name;
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}
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else {
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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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}
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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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