如何定义和编组BSTR *类型

时间:2012-08-15 06:25:56

标签: c# c++ marshalling com-interop unmarshalling

我想知道如何将字符串类型编组为BSTR *类型。 简单来说,C ++结构如下:

struct MyStruct
{
     BSTR* string;
     int a;
}

我需要在C#端定义一个新的sturct,我尝试了string []和IntPtr []但是没有取得成功。

感谢您的帮助!

编辑: c ++结构:

    struct HTTPTEXTRENDERERFILTERINFO {
        enum { UTC, GMT } eTimestamp;
        BOOL    bEnableCCIngest;
        LONG    lQueueSizeTreshold; 
        LONG    lSendTimeTreshold;  
        BYTE    btBroadcastUrlCount;
        BSTR*   pbstrBroadcastUrls;                                
        LONG    lInputPinsNum;      
    };

和函数的原型:

HRESULT HTTPTextRendererFilter::SetConfig(IN const HTTPTEXTRENDERERFILTERINFO& Config)

c#结构:

  

[StructLayout(LayoutKind.Sequential,CharSet = CharSet.Unicode)]       public struct HttpTextRenderFilterInfo       {           public enum TimestampType:int {UTC,GMT};

    public TimestampType Timestamp;
    public int EnableCCIngest;
    public int QueueSizeTreshold; 
    public int SendTimeTreshold;  
    public byte BroadcastUrlCount;
    [MarshalAs(UnmanagedType.BStr)]
    public string pbstrBroadcastUrls;        
    public int lInputPinsNum;     
};

原型:

    [PreserveSig]
    int SetConfig([In] ref HttpTextRenderFilterInfo config);

1 个答案:

答案 0 :(得分:1)

试试这个:

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Unicode)]
struct MyStruct
{
   [MarshalAs(UnmanagedType.BStr)] public String myString;
   public int a;
}