51 lines
2.5 KiB
C#
51 lines
2.5 KiB
C#
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namespace System.Web.ModelBinding {
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using System;
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using System.ComponentModel.DataAnnotations;
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using System.Globalization;
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using System.Reflection;
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public class DataAnnotationsModelMetadata : ModelMetadata {
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private DisplayColumnAttribute _displayColumnAttribute;
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public DataAnnotationsModelMetadata(DataAnnotationsModelMetadataProvider provider, Type containerType,
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Func<object> modelAccessor, Type modelType, string propertyName,
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DisplayColumnAttribute displayColumnAttribute)
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: base(provider, containerType, modelAccessor, modelType, propertyName) {
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_displayColumnAttribute = displayColumnAttribute;
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}
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protected override string GetSimpleDisplayText() {
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if (Model != null) {
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if (_displayColumnAttribute != null && !String.IsNullOrEmpty(_displayColumnAttribute.DisplayColumn)) {
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PropertyInfo displayColumnProperty = ModelType.GetProperty(_displayColumnAttribute.DisplayColumn, BindingFlags.Public | BindingFlags.IgnoreCase | BindingFlags.Instance);
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ValidateDisplayColumnAttribute(_displayColumnAttribute, displayColumnProperty, ModelType);
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object simpleDisplayTextValue = displayColumnProperty.GetValue(Model, new object[0]);
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if (simpleDisplayTextValue != null) {
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return simpleDisplayTextValue.ToString();
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}
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}
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}
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return base.GetSimpleDisplayText();
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}
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private static void ValidateDisplayColumnAttribute(DisplayColumnAttribute displayColumnAttribute, PropertyInfo displayColumnProperty, Type modelType) {
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if (displayColumnProperty == null) {
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throw new InvalidOperationException(
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String.Format(
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CultureInfo.CurrentCulture,
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SR.GetString(SR.DataAnnotationsModelMetadataProvider_UnknownProperty),
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modelType.FullName, displayColumnAttribute.DisplayColumn));
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}
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if (displayColumnProperty.GetGetMethod() == null) {
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throw new InvalidOperationException(
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String.Format(
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CultureInfo.CurrentCulture,
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SR.GetString(SR.DataAnnotationsModelMetadataProvider_UnreadableProperty),
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modelType.FullName, displayColumnAttribute.DisplayColumn));
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}
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}
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}
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}
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