private void LoadDll(string dllPath)
{
Guard.AgainstNullOrEmptyOrWhiteSpaceString(dllPath, nameof(dllPath));
dllHandle = WinFunctions.LoadLibrary(dllPath);
if (dllHandle == IntPtr.Zero)
{
throw new Exception("加载dll失败.");
}
}
protected virtual void Dispose(bool disposing)
{
if (disposing)
{
if (!disposed)
{
WinFunctions.FreeLibrary(dllHandle);
}
disposed = true;
}
}
public static TDelegate LoadUnmanagedFunction <TDelegate>(IntPtr dllHandle, string functionName) where TDelegate : class
{
if (dllHandle == IntPtr.Zero)
{
throw new ArgumentException("DLL handle is invalid.", nameof(dllHandle));
}
Guard.AgainstNullOrEmptyOrWhiteSpaceString(functionName, nameof(functionName));
var functionPtr = WinFunctions.GetProcAddress(dllHandle, functionName);
if (functionPtr == IntPtr.Zero)
{
return(null);
}
return((TDelegate)(object)Marshal.GetDelegateForFunctionPointer(functionPtr, typeof(TDelegate)));
}