PInvoke签名与非托管目标签名不匹配。检查PInvoke签名的调用约定和参数是否与目标匹配 [英] PInvoke signature does not match the unmanaged target signature. Check that the calling convention and parameters of the PInvoke signature match the target

问题描述

我试图调用DLL函数时遇到此运行时错误请帮帮我

这是dll functioj

 [DllImport（" candll.dll"，EntryPoint =" CanOpenTool2"）] 
 internal static extern int CanOpenTool2（uint channel，int baudRate，ushort destination，ushort source）; 
 
像这样调用
 int fd = 0; 
 const int REGULUS_TOOL_ID = 30; 
 ushort src = 0; 
 UInt16 bd = Convert.ToUInt16（iBaudRate）; 
 
 fd = CommunicationClass.CanOpenTool2（channel，iBaudRate，Convert.ToUInt16（canId），0）; 
 
 if（canId == 30）//索引1下拉列表中的工具ID，与PROM_TOOL_ID（30）相同
 {
 nSensorID =（int）SensorId.DM_ELECTRONICS; 
} 
 else //索引0（和默认值）下拉列表中的工具ID，与NEW_PROM_TOOL_ID（9）相同，以及其他所有内容
 {
 nSensorID =（int）SensorId.NODEID_DM ; 

int fd = 0;

        const int REGULUS_TOOL_ID = 30;

        ushort src = 0;

        UInt16 bd = Convert.ToUInt16（iBaudRate）;



        fd = CommunicationClass.CanOpenTool2（channel，iBaudRate，Convert.ToUInt16（canId），0）;  



        if（canId == 30）//索引1下拉列表中的工具ID，与PROM_TOOL_ID（30）相同为
        {

            nSensorID =（int）SensorId.DM_ELECTRONICS;

        }¥b $ b        else //索引0（和默认值）下拉菜单中的工具ID，与NEW_PROM_TOOL_ID（9）相同，其他一切为
        {

            nSensorID =（int）SensorId.NODEID_DM;

并尝试了2次差异，但同样的例外情况。 

fd = CommunicationClass.CanOpenTool2（channel，iBaudRate，canId，0）;  

解决方案

向我们展示如何在C / C ++代码中声明CanOpenTool2函数并从DLL导出。

I am getting this runtime error when tried to call DLL function please help me

this is dll functioj

[DllImport("candll.dll", EntryPoint = "CanOpenTool2")]
        internal static extern int CanOpenTool2(uint channel, int baudRate, ushort destination, ushort source);

Invoking like this
int fd=0;
        const int REGULUS_TOOL_ID = 30;
        ushort src = 0;
        UInt16 bd = Convert.ToUInt16(iBaudRate);

        fd = CommunicationClass.CanOpenTool2(channel, iBaudRate, Convert.ToUInt16(canId), 0);

        if (canId == 30)// Tool ID in dropdown at index 1, same as PROM_TOOL_ID (30)
        {
            nSensorID = (int)SensorId.DM_ELECTRONICS;
        }
        else // Tool ID in dropdown at index 0 (and default), same as NEW_PROM_TOOL_ID (9) and everything else
        {
            nSensorID = (int)SensorId.NODEID_DM;

int fd=0;
        const int REGULUS_TOOL_ID = 30;
        ushort src = 0;
        UInt16 bd = Convert.ToUInt16(iBaudRate);

        fd = CommunicationClass.CanOpenTool2(channel, iBaudRate, Convert.ToUInt16(canId), 0);  

        if (canId == 30)// Tool ID in dropdown at index 1, same as PROM_TOOL_ID (30)
        {
            nSensorID = (int)SensorId.DM_ELECTRONICS;
        }
        else // Tool ID in dropdown at index 0 (and default), same as NEW_PROM_TOOL_ID (9) and everything else
        {
            nSensorID = (int)SensorId.NODEID_DM;

and tried 2 diff ways but the same exception. 

fd = CommunicationClass.CanOpenTool2(channel, iBaudRate,canId, 0);  

解决方案

Show us how the CanOpenTool2 function is declared in the C/C++ code and exported from the DLL.

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