Question

我的Strcuture

struct Address{
char Name[4096];   
char Address[4096];
char Description[1024];

} ;

和Strcuture的Typedef

typedef struct Address* (*__cdecl pgetAdd) ();

我将值传递给类型

pgetAdd getStat = (pgetAdd)GetProcAddress(HMODULE (hGetProcIDDLL),"getStat"); 
char *Argv[] = { "Karthik", "23", "Chennai", "04-04-1984"}; 
getStat = (pgetAdd) startTest(Argv);
Address *mydata;
printf("\n mydata\n %s ", mydata>Name); 
printf("\n mydata\n %s ", mydata>Address); 
printf("\n mydata\n %s ", mydata> Description);

这包含c ++ dll

我需要从c＃

调用dll

我尝试了

我的Strcuture

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]

public struct Address
{
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4096)]
    public string Name;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4096)]
    public string Address;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 1024)]
    public string Description;
}

我像这样使用Typedef

[UnmanagedFunctionPointer(CallingConvention.Cdecl, CharSet = CharSet.Auto)]
public delegate IntPtr getStatDelegate();

我像这样导入dll

[DllImport(@"E:\\EmployeeData.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "startTest", CharSet = CharSet.Ansi)]
public unsafe static extern IntPtr startTest ([In] IntPtr argv);

我的代码是

 IntPtr args= StringArrayToIntPtr<byte>(new string[] {  "Karthik", "23", "Chennai", "04-04-1984" });
 IntPtr ptr = startTest(args);  
 getStatDelegate getStat = (getStatDelegate)Marshal.GetDelegateForFunctionPointer(ptr, typeof(getStatDelegate));

 IntPtr structPtr = new IntPtr();
 structPtr= getStat();

 Address data = (Address)Marshal.PtrToStructure(structPtr, typeof(Address));

 richTextBox1.Text = data.Name;

 richTextBox2.Text = data.Address;

 richTextBox3.Text = data.Description;


 public static IntPtr StringArrayToIntPtr<GenChar>(string[]
 InputStrArray) where GenChar : struct
 {
     int size = InputStrArray.Length;
     IntPtr[] InPointers = new IntPtr[size];
     int dim = IntPtr.Size * size;
     IntPtr rRoot = Marshal.AllocCoTaskMem(dim);
     for (int i = 0; i < size; i++)
     {
         if (typeof(GenChar) == typeof(char))
         {
             InPointers[i] = Marshal.StringToCoTaskMemUni(InputStrArray[i]);
         }
         else if (typeof(GenChar) == typeof(byte))
         {
             InPointers[i] = Marshal.StringToCoTaskMemAnsi(InputStrArray[i]);
         }
     }
     Marshal.Copy(InPointers, 0, rRoot, size);
     return rRoot;
}

我的输出

richTextBox1.Text = data.Name= Karthik;
richTextBox2.Text = data.Address= chennai;
richTextBox3.Text = data.Description=Welcome to our team something in dll;

我没有得到输出请更正代码以及帮助找到解决方案

提前感谢天才

**

如何调用c ++结构，在dll中输入typedef并使用delegate从C＃传递值

0 个答案: