C# 调用C++的dll,提示"尝试读取或写入受保护的内存。这通常指示其他内存已损坏"

[chinakgsoft]

C++:

GPSSUPPORT_API int __stdcall ress(unsigned char *compr, unsigned long comprLen, unsigned char **uncompr, unsigned long *uncomprLen);
C#:
public static extern int ZlibUncompress(ref byte[] compr, long comprLen, ref byte[] uncompr, ref long uncomprLen);
调用：
private byte[] Keys = { 0x78, 0xDA, 0x63, 0x60, 0x60, 0x6C, 0x60, 0x6A, 0x63, 0x64, 0x60, 0x16, 0x06, 0x00, 0x06, 0x59, 0x01, 0x21 };
byte[] b=new byte[255];
long blen=a.Length;
int Err = XWAPI.ZlibUncompress(ref a, (long)a.Length, ref b, ref blen);
提示：尝试读取或写入受保护的内存。这通常指示其他内存已损坏"
如何处理，谢谢．




尝试读取或写入受保护的内存。这通常指示其他内存已损坏。

[chinakgsoft]

C++的代码:GPSSUPPORT_API int __stdcall ZlibUncompress(unsigned char *compr, unsigned long comprLen, unsigned char **uncompr, unsigned long *uncomprLen);

[chinakgsoft]

C++代码写错了.是这样的:GPSSUPPORT_API int __stdcall ZlibUncompress(unsigned char *compr, unsigned long comprLen, unsigned char **uncompr, unsigned long *uncomprLen);

[qimini]

看不出来，不过char*一般对应C#里的string或者StringBuilder

[wenbin]

先用C写个测试程序看看，

[Dobzhansky]

[Quote=引用 4 楼 wodegege10 的回复:]
先用C写个测试程序看看，
[/Quote] .

[lunat]

[Quote=引用 2 楼 chinakgsoft 的回复:]
C++代码写错了.是这样的:GPSSUPPORT_API int __stdcall ZlibUncompress(unsigned char *compr, unsigned long comprLen, unsigned char **uncompr, unsigned long *uncomprLen);
[/Quote]

[DllImport("xx.dll")]
public static extern int ZlibUncompress(byte[] compr,uint comprLen,ref byte[] uncompr,ref uint uncomprLen);

[chinakgsoft]

[DllImport("xx.dll")]
public static extern int ZlibUncompress(byte[] compr,uint comprLen,ref byte[] uncompr,ref uint uncomprLen);


private byte[] Keys = { 0x78, 0xDA, 0x63, 0x60, 0x60, 0x6C, 0x60, 0x6A, 0x63, 0x64, 0x60, 0x16, 0x06, 0x00, 0x06, 0x59, 0x01, 0x21 }; uint blen=0;
uint alen = Convert.ToUInt32(Keys.Length);
byte[] buffer = new byte[128];
int Err = XWAPI.ZlibUncompress(Keys, alen, ref buffer, ref blen);

我这样写了.可是blen是对的.但buffer的没值,值不对.请上楼的朋友帮我看看.谢谢.

[lunat]

LZ的c++函数是否写错了?
我在网上查了一下 LZ用的是zlib.dll来压缩解压缩吧 貌似c++的函数原型不是这样的 你再仔细检查检查 压缩 解压缩的别写反了..

[diandian0122]

[DllImport("xx.dll")]
public static extern int ZlibUncompress(byte[] compr,uint comprLen,ref byte[] uncompr,ref uint uncomprLen);

[diandian0122]

[DllImport("xx.dll")]
public static extern int ZlibUncompress(byte[] compr,uint comprLen,ref byte[] uncompr,ref uint uncomprLen);