Managed C# Code -> ManagedCS.dll ( Assembly)
- create methods as static public
- set output path to a location where the ManagedDll.lib can reference during runtime
public static class ManagedClass
{
public static void ShowValue(ref int value)
{
DialogResult result = MessageBox.Show("C# Message Box", "C# Message Box", MessageBoxButtons.OKCancel);
if (result == DialogResult.OK)
value = 1;
else
value = 2;
return;
}
public static void PassString(string s)
{
MessageBox.Show(s);
}
public static void PassImage(byte[] byteArray)
{
//byte[] imageBytes = Convert.FromBase64String(base64String);
MemoryStream ms = new MemoryStream(byteArray, 0, byteArray.Length);
// Convert byte[] to Image
ms.Write(byteArray, 0, byteArray.Length);
Image image = Image.FromStream(ms, true);
image.Save(@"c:\Out\Out.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
}
public static void PassFloat(float f)
{
Console.WriteLine("F=" + f);
}
}
Managed C++ Code -> ManagedDLL.lib
- cretaed as a CLR class library project ( /clr)
- Add reference to managedCS.dll
- Create a wrapper class
- Use Marshall to convert data types before passing to managed code
public ref class DoWork
{
public:void ShowCSharpMessageBox(int *value)
{
ManagedCS::ManagedClass::ShowValue(*value); // call csharp dll
return;
}
public:void PassCSharpString( char *str)
{
String ^s = Marshal::PtrToStringAnsi(static_cast
ManagedCS::ManagedClass::PassString(s);
}
public:void PassCShrapFloat(float value)
{
ManagedCS::ManagedClass::PassFloat(value);
return;
}
public:void PassCSharpImage(unsigned char str[], int len )
{
printf("len = %d", len);
array
Marshal::Copy( (IntPtr)str, byteArray, 0, len );
ManagedCS::ManagedClass::PassImage ( byteArray);
}
- export the methods to unmanaged code
__declspec(dllexport) void ShowMessageBox(int *value)
{
ManagedDLL::DoWork work;
work.ShowCSharpMessageBox(value);
}
__declspec(dllexport) void PassString(char *s)
{
ManagedDLL::DoWork work;
work.PassCSharpString(s);
}
__declspec(dllexport) void PassFloat(float f)
{
ManagedDLL::DoWork work;
work.PassCShrapFloat(f);
}
__declspec(dllexport) void PassImage(unsigned char *s, int len)
{
ManagedDLL::DoWork work;
work.PassCSharpImage(s, len);
}
Unmanaged C++
- Add references to exported methods in code
_declspec(dllexport) void ShowMessageBox(int *value);
_declspec(dllexport) void PassString(char *s);
_declspec(dllexport) void PassFloat(float f);
_declspec(dllexport) void PassImage(unsigned char *s, int len);
- Add linker input to point to the ManagedDLL.lib
