将C＃类型更改为c ++ [英] change C# type to c++

问题描述

例如，下面：

c＃：string filePath =c：\\tu.txt;

c ++：string filePath [] =c ：\\tu.txt;



如何将c＃类型更改为c ++，因为我使用dllimport调用c ++函数，函数参数是字符串filePath [] =c：\\ tu.txt;那么如何改变或如何解决？



谢谢。

For example,below:
c#: string filePath = "c:\\tu.txt";
c++: string filePath[] = "c:\\tu.txt";

how to change c# type to c++，because i use dllimport to invoke the c++ function,the function parameter is string filePath[] = "c:\\tu.txt";then how to change or how to solve?

thanks.

推荐答案

查看这些链接。



Win32 API：C ++ to .NET [ ^ ]



http://msdn.microsoft .com / en-in / library / 4xwz0t37（v = vs.90）.aspx [ ^ ]

Check these links.

Win32 API: C++ to .NET[^]

http://msdn.microsoft.com/en-in/library/4xwz0t37(v=vs.90).aspx[^]

如上所述，这个问题毫无意义。您不是在谈论C ++ / CLI，而是关于C ++，它以本机平台为目标，而不是.NET。大多数类型不同，无法比较;它们不能在P / Invoke之外的任何地方一起工作。



你的问题只在一个方面有意义：类型是函数参数。当您使用P / Invoke调用C ++函数时，某些类型是封送。默认情况下，按值 char * （ char [] ）参数被编组为 System.String ，并通过引用参数编组为 System.Text.StringBuilder 。 （这是因为 System.String 是 immutable ;而 System.Text.StringBuilder 可以被视为字符串的可变版本。）

-SA

The question, as it is stated, makes no sense. You are not talking about C++/CLI, but about C++, which target native platforms, not .NET. Most types are different and cannot be compared; they don't work together anywhere beyond P/Invoke.

Your question makes sense only in one aspect: types are function parameters. When you call a C++ function using P/Invoke, some types are marshaled. By default, a by-value char* (char[]) parameter is marshaled as System.String, and by reference parameter is marshaled as System.Text.StringBuilder. (This is because System.String is immutable; and System.Text.StringBuilder can be considered as a mutable version of string.)

—SA

C ++类型C＃类型大小

BOOL bool 1字节

字节字节1字节

CHAR字节1字节

DECIMAL十进制16字节

DOUBLE双8字节

DWORD uint，UInt32 4字节

FLOAT浮点数，单个4字节

INT，签名int int，Int32 4 bytes

INT16，signed short int short，Int16 2 bytes

INT32，signed int int，int32 4 bytes

INT64 long，Int64 8字节

LONG int，Int32 4字节s

LONG32，signed int int，Int32 4 bytes

LONG64 long，Int64 8 bytes

LONGLONG long，Int64 8 bytes

SHORT，签名短int短，Int16 2字节

UCHAR，无符号字节1字节

UINT，unsigned int uint，UInt32 4字节

UINT16 ushort，UInt16 2字节

UINT32，unsigned int uint，UInt32 4字节

UINT64 ulong，UInt64 8字节

C++ Type C# Type Size
BOOL bool 1 byte
BYTE byte 1 byte
CHAR byte 1 byte
DECIMAL Decimal 16 bytes
DOUBLE double 8 bytes
DWORD uint, UInt32 4 bytes
FLOAT float, single 4 bytes
INT, signed int int, Int32 4 bytes
INT16, signed short int short, Int16 2 bytes
INT32, signed int int, Int32 4 bytes
INT64 long, Int64 8 bytes
LONG int, Int32 4 bytes
LONG32, signed int int, Int32 4 bytes
LONG64 long, Int64 8 bytes
LONGLONG long, Int64 8 bytes
SHORT, signed short int short, Int16 2 bytes
UCHAR, unsigned char byte 1 byte
UINT, unsigned int uint, UInt32 4 bytes
UINT16 ushort, UInt16 2 bytes
UINT32, unsigned int uint, UInt32 4 bytes
UINT64 ulong, UInt64 8 bytes

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