ProviderSelectorAttribute.cs

	public class PXSYProviderSelector : PXCustomSelectorAttribute
	{
		[Serializable]
		public class ProviderRec : IBqlTable
		{
			#region TypeName
			public abstract class typeName : PX.Data.IBqlField { }
			[PXString(128, InputMask = "", IsKey = true)]
			[PXUIField(DisplayName = "Type Name", Visibility = PXUIVisibility.SelectorVisible)]
			public virtual string TypeName { get; set; }
			#endregion
			#region Description
			public abstract class description : PX.Data.IBqlField { }
			[PXDBString(128, InputMask = "", IsUnicode = true)]
			[PXUIField(DisplayName = "Description", Visibility = PXUIVisibility.SelectorVisible)]
			public virtual string Description { get; set; }
			#endregion
		}

		public PXSYProviderSelector()
			: base(typeof(ProviderRec.typeName))
		{
			DescriptionField = typeof(ProviderRec.description);
		}

		protected IEnumerable GetRecords()
		{
			foreach (Assembly ass in AppDomain.CurrentDomain.GetAssemblies())
			{
				if (PXSubstManager.IsSuitableTypeExportAssembly(ass, true))
				{
					Type[] types = null;
					try
					{
						if ( !ass.IsDynamic )
							types = ass.GetExportedTypes();
					}
					catch (ReflectionTypeLoadException te)
					{
						types = te.Types;
					}
					catch
					{
						continue;
					}
					if (types != null)
					{
						foreach (Type t in types)
						{
							if (t != null && typeof(IPXSYProvider).IsAssignableFrom(t) && !t.IsInterface)
							{
								String description = t.Name;
								string defaultFileExtension = null;
								try
								{
									IPXSYProvider prov = (IPXSYProvider)Activator.CreateInstance(t);
									description = prov.ProviderName;
									defaultFileExtension = prov.DefaultFileExtension;
								}
								catch{/* Skip Exceptions */}
								yield return new ProviderRec { TypeName = t.FullName, Description = description, DefaultFileExtension = defaultFileExtension };
							}
						}
					}
				}
			}
		}
	}