c++和c#数据类型转换

1. //C#调用C++的DLL搜集整理的所有数据类型转换方式
2. //c++:HANDLE(void *) ---- c#:System.IntPtr
3. //c++:Byte(unsigned char) ---- c#:System.Byte
4. //c++:SHORT(short) ---- c#:System.Int16
5. //c++:WORD(unsigned short) ---- c#:System.UInt16
6. //c++:INT(int) ---- c#:System.Int16
7. //c++:INT(int) ---- c#:System.Int32
8. //c++:UINT(unsigned int) ---- c#:System.UInt16
9. //c++:UINT(unsigned int) ---- c#:System.UInt32
10. //c++:LONG(long) ---- c#:System.Int32
11. //c++:ULONG(unsigned long) ---- c#:System.UInt32
12. //c++:DWORD(unsigned long) ---- c#:System.UInt32
13. //c++:DECIMAL ---- c#:System.Decimal
14. //c++:BOOL(long) ---- c#:System.Boolean
15. //c++:CHAR(char) ---- c#:System.Char
16. //c++:LPSTR(char *) ---- c#:System.String
17. //c++:LPWSTR(wchar_t *) ---- c#:System.String
18. //c++:LPCSTR(const char *) ---- c#:System.String
19. //c++:LPCWSTR(const wchar_t *) ---- c#:System.String
20. //c++:PCAHR(char *) ---- c#:System.String
21. //c++:BSTR ---- c#:System.String
22. //c++:FLOAT(float) ---- c#:System.Single
23. //c++:DOUBLE(double) ---- c#:System.Double
24. //c++:VARIANT ---- c#:System.Object
25. //c++:PBYTE(byte *) ---- c#:System.Byte[]
28. //c++:WORD ---- c#:ushort
29. //c++:DWORD ---- c#:uint
30. //c++:DWORD ---- c#:int
33. //c++:UCHAR ---- c#:int
34. //c++:UCHAR ---- c#:byte
35. //c++:UCHAR* ---- c#:string
36. //c++:UCHAR* ---- c#:IntPtr
39. //c++:GUID ---- c#:Guid
40. //c++:Handle ---- c#:IntPtr
41. //c++:HWND ---- c#:IntPtr
42. //c++:DWORD ---- c#:int
43. //c++:COLORREF ---- c#:uint
46. //c++:unsigned char ---- c#:byte
47. //c++:unsigned char * ---- c#:ref byte
48. //c++:unsigned char * ---- c#:[MarshalAs(UnmanagedType.LPArray)] byte[]
49. //c++:unsigned char * ---- c#:[MarshalAs(UnmanagedType.LPArray)] Intptr
52. //c++:unsigned char & ---- c#:ref byte
53. //c++:unsigned char 变量名 ---- c#:byte 变量名
54. //c++:unsigned short 变量名 ---- c#:ushort 变量名
55. //c++:unsigned int 变量名 ---- c#:uint 变量名
56. //c++:unsigned long 变量名 ---- c#:ulong 变量名
59. //c++:char 变量名 ---- c#:byte 变量名 //C++中一个字符用一个字节表示,C#中一个字符用两个字节表示
60. //c++:char 数组名[数组大小] ---- c#:MarshalAs(UnmanagedType.ByValTStr, SizeConst = 数组大小)] public string 数组名; ushort
63. //c++:char * ---- c#:string //传入参数
64. //c++:char * ---- c#:StringBuilder//传出参数
65. //c++:char *变量名 ---- c#:ref string 变量名
66. //c++:char *输入变量名 ---- c#:string 输入变量名
67. //c++:char *输出变量名 ---- c#:[MarshalAs(UnmanagedType.LPStr)] StringBuilder 输出变量名
70. //c++:char ** ---- c#:string
71. //c++:char **变量名 ---- c#:ref string 变量名
72. //c++:const char * ---- c#:string
73. //c++:char[] ---- c#:string
74. //c++:char 变量名[数组大小] ---- c#:[MarshalAs(UnmanagedType.ByValTStr,SizeConst=数组大小)] public string 变量名;
77. //c++:struct 结构体名 *变量名 ---- c#:ref 结构体名 变量名
78. //c++:委托 变量名 ---- c#:委托 变量名
81. //c++:int ---- c#:int
82. //c++:int ---- c#:ref int
83. //c++:int & ---- c#:ref int
84. //c++:int * ---- c#:ref int //C#中调用前需定义int 变量名 = 0;
87. //c++:*int ---- c#:IntPtr
88. //c++:int32 PIPTR * ---- c#:int32[]
89. //c++:float PIPTR * ---- c#:float[]
93. //c++:double** 数组名 ---- c#:ref double 数组名
94. //c++:double*[] 数组名 ---- c#:ref double 数组名
95. //c++:long ---- c#:int
96. //c++:ulong ---- c#:int
98. //c++:UINT8 * ---- c#:ref byte //C#中调用前需定义byte 变量名 = new byte();
101. //c++:handle ---- c#:IntPtr
102. //c++:hwnd ---- c#:IntPtr
105. //c++:void * ---- c#:IntPtr
106. //c++:void * user_obj_param ---- c#:IntPtr user_obj_param
107. //c++:void * 对象名称 ---- c#:([MarshalAs(UnmanagedType.AsAny)]Object 对象名称
110. //c++:char, INT8, SBYTE, CHAR ---- c#:System.SByte
111. //c++:short, short int, INT16, SHORT ---- c#:System.Int16
112. //c++:int, long, long int, INT32, LONG32, BOOL , INT ---- c#:System.Int32
113. //c++:__int64, INT64, LONGLONG ---- c#:System.Int64
114. //c++:unsigned char, UINT8, UCHAR , BYTE ---- c#:System.Byte
115. //c++:unsigned short, UINT16, USHORT, WORD, ATOM, WCHAR , __wchar_t ---- c#:System.UInt16
116. //c++:unsigned, unsigned int, UINT32, ULONG32, DWORD32, ULONG, DWORD, UINT ---- c#:System.UInt32
117. //c++:unsigned __int64, UINT64, DWORDLONG, ULONGLONG ---- c#:System.UInt64
118. //c++:float, FLOAT ---- c#:System.Single
119. //c++:double, long double, DOUBLE ---- c#:System.Double
122. //Struct需要在C#里重新定义一个Struct
123. //CallBack回调函数需要封装在一个委托里，delegate static extern int FunCallBack(string str);
126. //unsigned char** ppImage替换成IntPtr ppImage
127. //int& nWidth替换成ref int nWidth
128. //int*, int&, 则都可用 ref int 对应
129. //双针指类型参数，可以用 ref IntPtr
130. //函数指针使用c++: typedef double (*fun_type1)(double); 对应 c#:public delegate double fun_type1(double);
131. //char* 的操作c++: char*; 对应 c#:StringBuilder;
132. //c#中使用指针:在需要使用指针的地方 加 unsafe