c# 動态加載dll庫

[DllImport("kernel32.dll")]

private extern static IntPtr LoadLibrary(String path);

[DllImport("kernel32.dll")]

private extern static IntPtr GetProcAddress(IntPtr lib, String funcName);

[DllImport("kernel32.dll")]

private extern static bool FreeLibrary(IntPtr lib);

private IntPtr hLib;

public Patrol(string filepath)

{

if (hLib == null || hLib == (IntPtr)0)

{

hLib = LoadLibrary(filepath);

}

if (hLib != (IntPtr)0)

{

funcEnumDongle = (Type_EnumDongle)Invoke("EnumDongle", typeof(Type_EnumDongle));

funcDongleRead = (Type_DongleRead)Invoke("DongleRead", typeof(Type_DongleRead));

}

}

~Patrol()

{

if (hLib != null)

FreeLibrary(hLib);

}

//将要執行的函數轉換為委托

public Delegate Invoke(String APIName, Type t)

{

IntPtr api = GetProcAddress(hLib, APIName);

return (Delegate)Marshal.GetDelegateForFunctionPointer(api, t);

}

private delegate UInt32 Type_EnumDongle();

private static Type_EnumDongle funcEnumDongle;

/// <summary>

/// 調用庫中事件

/// </summary>

public static UInt32 PCPSEnumDongle()

{

return funcEnumDongle();

}

轉載于:https://www.cnblogs.com/wangye520/p/8204974.html