Saving

PrivaPub.ClientModels/AtLeastOnePropertyAttribute.cs

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+using System.ComponentModel.DataAnnotations;
+using System.Reflection;
+
+namespace PrivaPub.ClientModels
+{
+	[AttributeUsage(AttributeTargets.Class, AllowMultiple = true)]
+	public class AtLeastOnePropertyAttribute : ValidationAttribute
+	{
+		private string[] PropertyList { get; set; }
+
+		public AtLeastOnePropertyAttribute(params string[] propertyList)
+		{
+			PropertyList = propertyList;
+		}
+
+		public override object TypeId
+		{
+			get
+			{
+				return this;
+			}
+		}
+
+		public override bool IsValid(object value)
+		{
+			PropertyInfo propertyInfo;
+			foreach (string propertyName in PropertyList)
+			{
+				propertyInfo = value.GetType().GetProperty(propertyName);
+
+				if (propertyInfo != null && propertyInfo.GetValue(value, null) != null)
+					return true;
+			}
+
+			return false;
+		}
+	}
+}