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