如何解决无法调用本机dll
| 尝试使用命令dll(c ++)项目将c# 结构dlltypedef struct {
SSP_FULL_KEY Key;
unsigned long BaudRate;
unsigned long Timeout;
unsigned char PortNumber;
unsigned char SSPAddress;
unsigned char RetryLevel;
unsigned char EncryptionStatus;
unsigned char CommandDataLength;
unsigned char CommandData [255];
unsigned char ResponseStatus;
unsigned char ResponseDataLength;
unsigned char ResponseData [255];
unsigned char IgnoreError;
} SSP_COMMAND;
typedef struct {
unsigned __int64 FixedKey;
unsigned __int64 EncryptKey;
} SSP_FULL_KEY;
这是我转过的代码
public struct SSP_FULL_KEY
{
long FixedKey;
long EncryptKey;
public SSP_FULL_KEY (long fix,long encr)
{
FixedKey = fix;
EncryptKey = encr;
}
}
public struct SSP_COMMAND
{
/ / String PortNumber;
SSP_FULL_KEY key;
long BaudRate; / / baud rate of the packet
long Timeout; / / how long in ms to wait for a reply from the slave
string PortNumber; / / the serial com port number of the host
string SSPAddress; / / the SSP address of the slave
string RetryLevel; / / how many retries to the slave for non-response
string EncryptionStatus; / / is this an encrypted command 0 - No,1 - Yes
string CommandDataLength; / / Number of bytes in the command
string [] CommandData; / / Array containing the command bytes
string ResponseStatus; / / Response Status (PORT_STATUS enum)
string ResponseDataLength; / / how many bytes in the response
string [] ResponseData; / / an array of response data
string IgnoreError; / / flag to suppress error box (0 - display,1 - suppress)
public SSP_COMMAND (string comport)
{
BaudRate = 9600;
Timeout = 500;
PortNumber = comport;
RetryLevel = \"5\";
IgnoreError = \"0\";
EncryptionStatus = \"0\";
CommandData = new string [255];
ResponseData = new string [255];
ResponseStatus = \"0\";
ResponseDataLength = \"0\";
SSPAddress = \"0\";
CommandDataLength = \"0\";
key = new SSP_FULL_KEY (0123456701234567,0123456701234567);
}
}
class Program
{
/ / [DllImport (\"ITLSSPProc.dll\")]
/ / Private static extern int OpenSSPComPort (IntPtr smd);
[DllImport (\"ITLSSPProc.dll\")]
private static extern int OpenSSPComPort (SSP_COMMAND cmd);
static void Main (string [] args)
{
SSP_COMMAND cmd = new SSP_COMMAND (\"6\");
/ * IntPtr.BaudRate = 9600;
IntPtr.PortName = \"COM0\";
IntPtr.Parity = Parity.None;
IntPtr.StopBits = StopBits.One;
* /
Console.WriteLine (OpenSSPComPort (cmd));
}
出现错误
尝试读取或写入受保护的内存。这通常表明其他内存已损坏。
更新
重制,仍然是相同的错误
public unsafe struct SSP_FULL_KEY
{
System.Int64 FixedKey;
System.Int64 EncryptKey;
public SSP_FULL_KEY(System.Int64 fix,System.Int64 encr)
{
FixedKey = fix;
EncryptKey = encr;
}
}
public unsafe struct SSP_COMMAND
{
//string PortNumber;
SSP_FULL_KEY key;
System.Int64 BaudRate; // baud rate of the packet
System.Int64 Timeout; // how long in ms to wait for a reply from the slave
string PortNumber; // the serial com port number of the host
string SSPAddress; // the SSP address of the slave
string RetryLevel; // how many retries to the slave for non-response
string EncryptionStatus; // is this an encrypted command 0 - No,1 - Yes
string CommandDataLength; // Number of bytes in the command
fixed char CommandData[255]; // Array containing the command bytes
string ResponseStatus; // Response Status (PORT_STATUS enum)
string ResponseDataLength; // how many bytes in the response
fixed char ResponseData[255]; // an array of response data
string IgnoreError; // flag to suppress error box (0 - display,1- suppress)
public SSP_COMMAND(string comport)
{
BaudRate = 9600;
Timeout = 500;
PortNumber = comport;
RetryLevel = \"5\";
IgnoreError = \"0\";
EncryptionStatus = \"0\";
ResponseStatus = \"0\";
ResponseDataLength = \"0\";
SSPAddress = \"0\";
CommandDataLength = \"0\";
key = new SSP_FULL_KEY(0123456701234567,0123456701234567);
}
}
解决方法
您已将ѭ3正确转换为C#
long
。
然后,您还想将long BaudRate
和long Timeout
制成C#but4ѭ,但这是错误的,它们是32位变量。
最好忘记类型long
曾经存在过(就互操作而言),因为它总是会增加混乱。只要适当使用System.Int64
和System.Int32
即可。
您的字符串也是错误的,它们是C ++中的内联char数组,这意味着您需要在C#中使用属性,否则将使用fixed
数组。
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