C ++ idl修复长度数组在C＃tlb中编组为变量数组 [英] C++ idl fix length array Marshaling as variable array in C# tlb

问题描述

以下是* .idl内容

 [ uuid  （C3BBAEE5-DC4A-  4873  -963B-EFDAC87FC443）] 
  typedef   enum  
 {
 eVal1 =  1 ，
 eVal2 =  2  
} EData1; 
 
 
 [ uuid （1B790A2A-9F6F-4F03-A54F-993B52D507A6）] 
  struct  STData1 
 {
 EData1 ed1; 
  float  fValue [ 15 ]; 
} 
 
 [ uuid （AA612D65-AE0E-4C51-9A35-79A76FF20747）] 
  struct  STData2 
 {
  long   long  tTimeStamp; 
  struct  STData1 tData [ 16 ]; 
}; 

$ C $ b在C＃中引用包含这些结构的dll，但得到

 [Serializable] 
 [SuppressUnmanagedCodeSecurity] 
 [Guid（  AA612D65-AE0E-4C51-9A35-79A76FF20747）] 
  public   struct  STData2 
 {
   public  STData1 [] tData ; 
  public   long  tTimeStamp; 
} 
 

见上文，STData1不带长度16.请帮助。



提前感谢。

解决方案

看看数组的默认封送处理 [ MSDN上的^ ] - 你可以在底部尝试做一个例子：

 [Serializable] 
 [SuppressUnmanagedCodeSecurity] 
 [Guid（  AA612D65-AE0E-4C51-9A35-79A76FF20747）] 
  public   struct  STData2 
 {
  public   long  tTimeStamp; 
 [MarshalAs（UnmanagedType.ByValArray，SizeConst =  16 ）] 
  public  STData1 [] tData; 
} 

NB： C＃结构中字段的顺序需要与C ++结构中字段的顺序相匹配

Below is the *.idl content

[uuid(C3BBAEE5-DC4A-4873-963B-EFDAC87FC443)]
typedef enum
{
eVal1 =1,
eVal2 =2
}EData1;


[uuid(1B790A2A-9F6F-4F03-A54F-993B52D507A6)]
struct STData1
{
      EData1     ed1;
      float      fValue[15];
}

[uuid(AA612D65-AE0E-4C51-9A35-79A76FF20747)]
struct STData2
{
   long long      tTimeStamp;
   struct STData1 tData[16];
};

in C# refering the dll containing these structures,But getting

[Serializable]
       [SuppressUnmanagedCodeSecurity]
       [Guid("AA612D65-AE0E-4C51-9A35-79A76FF20747")]
       public struct STData2
       {
           public STData1[] tData;
           public long tTimeStamp;
       }

See above, STData1 not carrying the length 16.Please help.

thanks in advance.

解决方案

Have a look at Default Marshaling for Arrays[^] on MSDN - there's an example of what you're trying to do at the bottom:

[Serializable]
[SuppressUnmanagedCodeSecurity]
[Guid("AA612D65-AE0E-4C51-9A35-79A76FF20747")]
public struct STData2
{
    public long tTimeStamp;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
    public STData1[] tData;
}

NB: The order of the fields in the C# structure needs to match the order of the fields in the C++ structure.

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