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public class DllInvoke
{
[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 DllInvoke(String DLLPath)
{
hLib = LoadLibrary(DLLPath);
}
~DllInvoke()
{
FreeLibrary(hLib);
}
//将要执行的函数转换为委托
public Delegate Invoke(String APIName,Type t)
{
IntPtr api = GetProcAddress(hLib, APIName);
return (Delegate)Marshal.GetDelegateForFunctionPointer(api,t);
}
}
下面代码进行调用
public delegate int Compile(String command, StringBuilder inf);//编译
DllInvoke dll = new DllInvoke(Server.MapPath(@"~/Bin/Judge.dll"));
Compile compile = (Compile)dll.Invoke("Compile", typeof(Compile));
StringBuilder inf;
compile(@“gcc a.c -o a.exe“,inf); //这里就是调用我的DLL里定义的Compile函数