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'COM'에 해당되는 글 1건

  1. 2010.01.07 0011. CSServicedComponent

0011. CSServicedComponent

Sample Codes 2010. 1. 7. 11:39
.NET으로 COM+ 객체를 만드는 예제.

.NET으로 COM+객체를 만들때는 먼저 Project Property에 Comvisible(true)로 설정이 되어 있어야지 된다. 그리고 assembly:Guid 속성에 component guid를 등록시켜야지만 com 객체를 만드는 가장 기초적인 설정이 끝이 난다. 이와같은 설정을 하면 작성된 dll이나 exe를 com+ 객체로 등록할 수 있다.

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1.// Setting ComVisible to false makes the types in this assembly not visible
2.// to COM components.  If you need to access a type in this assembly from
3.// COM, set the ComVisible attribute to true on that type.
4.[assembly: ComVisible(true)]
5.// The following GUID is for the ID of the typelib if this project is exposed to COM
6.[assembly: Guid("3308202e-a355-4c3b-805d-b527d1ef5fa3")]

그러나, dll을 등록한다고해서 library안의 class들이 모두 com객체로 사용할 수 있는 것이 아니다. dll은 여러개의 com객체를 담을 수 있는 상자이고, 그 상자안에 채워야지 될 com객체들은 각각 작성되어야지 된다. com을 이용하는 것은 com 객체 뿐 아니라, com 객체를 구성하고 있는 interface역시 사용할 수 있어야지 되기 때문에, com으로 외부에서 노출될 모든 interface와 class들은 Guid Class Property를 갖고, 각 Guid 값을 가져야지 된다.

com으로 사용되기 위해서, class와 interface가 가져야지 될 속성은 각각 다른데, interface는 ComInterfaceType Property와 Guid를 가져야지 되며, class는 Com으로 제공될 ComSourceInterfaces, ClassInterface, Transaction, Guid, Com 객체 사용에서 Pool과 CreateTimeOut을 제한하는 ObjectPooling attribute를 가져야지 된다.

com interface 구현 예제
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01.#region Interfaces
02. 
03.[Description("ICSSimpleObject description")]
04.[Guid("2A59630E-4232-4582-AE47-706E2B648579")]
05.// The public interface describing the COM interface of the coclass
06.public interface ICSSimpleObject
07.{
08.    #region Properties
09. 
10.    float FloatProperty { get; set; }
11. 
12.    #endregion
13. 
14.    #region Methods
15. 
16.    [Description("HelloWorld description")]
17.    string HelloWorld();
18. 
19.    void GetProcessThreadID(out uint processId, out uint threadId);
20. 
21.    [Description("DoTransaction description")]
22.    void DoTransaction();
23. 
24.    #endregion
25.}
26. 
27.[Guid("A06C000A-7A85-42dc-BA6D-BE736B6EB97A")]
28.[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
29.// The public interface describing the events the coclass can sink
30.public interface ICSSimpleObjectEvents
31.{
32.    #region Events
33. 
34.    [DispId(1)]
35.    void FloatPropertyChanging(float NewValue, ref bool Cancel);
36. 
37.    #endregion
38.}
39.#endregion

com class 구현 예제
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01.// The ObjectPooling attribute is used to configure the component's object
02.// pooling. It can enable or disables object pooling and set the min. or 
03.// max. pool size and object creation timeout.
04.[ObjectPooling(MinPoolSize=2, MaxPoolSize=10, CreationTimeout=20)]
05.// Creates the component with a new transaction, regardless of the state
06.// of the current context.
07.[Transaction(TransactionOption.Required)]
08.[ClassInterface(ClassInterfaceType.None)]
09.[ComSourceInterfaces(typeof(ICSSimpleObjectEvents))]
10.[Guid("14EAD156-F55E-4d9b-A3C5-658D4BB56D30")]
11.public class CSSimpleObject : ServicedComponent, ICSSimpleObject
12.{
13.    #region Properties
14. 
15.    /// <summary>
16.    /// The private members don't make it into the type-library and are
17.    /// hidden from the COM clients.
18.    /// </summary>
19.    private float fField = 0;
20. 
21.    /// <summary>
22.    /// A public property with both get and set accessor methods.
23.    /// </summary>
24.    public float FloatProperty
25.    {
26.        get { return this.fField; }
27.        set
28.        {
29.            bool cancel = false;
30.            // Raise the event FloatPropertyChanging
31.            if (null != FloatPropertyChanging)
32.                FloatPropertyChanging(value, ref cancel);
33.            if (!cancel)
34.                this.fField = value;
35.        }
36.    }
37. 
38.    #endregion
39. 
40.    #region Methods
41. 
42.    /// <summary>
43.    /// A public method that returns a string "HelloWorld".
44.    /// </summary>
45.    /// <returns>"HelloWorld"</returns>
46.    public string HelloWorld()
47.    {
48.        return "HelloWorld";
49.    }
50. 
51.    /// <summary>
52.    /// A public method with two outputs: the current process Id and the
53.    /// current thread Id.
54.    /// </summary>
55.    /// <param name="processId">[out] The current process Id
56.    /// <param name="threadId">[out] The current thread Id
57.    public void GetProcessThreadID(out uint processId, out uint threadId)
58.    {
59.        processId = NativeMethod.GetCurrentProcessId();
60.        threadId = NativeMethod.GetCurrentThreadId();
61.    }
62. 
63.    public void DoTransaction()
64.    {
65.        try
66.        {
67.            // Operate on the resource managers like DBMS
68.            // ...
69.     
70.            ContextUtil.SetComplete();  // Commit
71.        }
72.        catch (Exception ex)
73.        {
74.            ContextUtil.SetAbort();     // Rollback
75.            throw ex;
76.        }
77.    }
78. 
79.    #endregion
80. 
81.    #region Events
82. 
83.    [ComVisible(false)]
84.    public delegate void FloatPropertyChangingEventHandler(float NewValue, ref bool Cancel);
85. 
86.    /// <summary>
87.    /// A public event that is fired before new value is set to the
88.    /// FloatProperty property. The Cancel parameter allows the client
89.    /// to cancel the change of FloatProperty.
90.    /// </summary>
91.    public event FloatPropertyChangingEventHandler FloatPropertyChanging;
92. 
93.    #endregion
94.}
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