runlocalattribute.cs

C# 版本的一个三层商业架构

using System;

/// <summary>
/// Allows us to mark DataPortal_xxx methods to
/// be run on the client even if the server-side
/// DataPortal is configured for remote use.
/// </summary>
/// <remarks>
/// <para>
/// The primary purpose for this attribute is to
/// mark DataPortal_Create to run locally in the case
/// where we don't need to load default values
/// from the database as the object is being created.
/// </para><para>
/// By running DataPortal_Create locally we avoid all
/// the network overhead of going to the server for
/// no purpose.
/// </para><para>
/// <b>Note that if you DO need to actually interact with
/// the database in your DataPortal_xxx method you SHOULD
/// NOT apply this attribute to your DataPortal_xxx method!</b>
/// </para><para>
/// Also note that if you apply this attribute and the 
/// Transactional attribute to the same method, you MUST
/// register the ServicedDataPortal DLL with COM+ on the
/// client machine or you'll get a runtime failure. The
/// exception to this is if the user is an administrator
/// on the client machine, in which case Enterprise Services
/// will automatically register the DLL with COM+.
/// </para>
/// </remarks>
[AttributeUsage(AttributeTargets.Method)]
public class RunLocalAttribute : Attribute
{
}