将代码作为参数传递给"using statement"中的参数

Question

这段代码对我很好:

    [DllImport("advapi32.dll", SetLastError = true)]
    public static extern bool LogonUser(string lpszUsername, string lpszDomain, string lpszPassword, int dwLogonType, int dwLogonProvider, ref IntPtr phToken);

    [DllImport("kernel32.dll")]
    public static extern bool CloseHandle(IntPtr token);

enum LogonType
    {
        Interactive = 2,
        Network = 3,
        Batch = 4,
        Service = 5,
        Unlock = 7,
        NetworkClearText = 8,
        NewCredentials = 9
    }
    enum LogonProvider
    {
        Default = 0,
        WinNT35 = 1,
        WinNT40 = 2,
        WinNT50 = 3
    }

private void Button1_Click()
    { 
        IntPtr token = IntPtr.Zero;
        LogonUser("Administrator",
                  "192.168.1.244",
                  "PassWord",
                  (int)LogonType.NewCredentials,
                  (int)LogonProvider.WinNT50,
                  ref token);
        using (WindowsImpersonationContext context = WindowsIdentity.Impersonate(token))
        {
    CloseHandle(token);
    /*
    Code_of_Do_Something
    */
    }
}

但是......这意味着每次我需要进行模拟时,我必须重复"Button1_Click()"内的最后一个代码(在远程机器上做某事=服务器).所以我的问题是:是否可以做这样的插图？:

Answer 1

是的，可以将代码作为参数传递。但让我们不使用 lambda 来解决您的问题：

private void Button1_Click()
{
    using(GetImpersonationContext())
    {
        /* code here */
    } 
}
private WindowsImpersonationContext GetImpersonationContext()
{
    IntPtr token = IntPtr.Zero;
    LogonUser("Administrator",
              "192.168.1.244",
              "PassWord",
              (int)LogonType.NewCredentials,
              (int)LogonProvider.WinNT50,
              ref token);

    WindowsImpersonationContext context = WindowsIdentity.Impersonate(token);
    CloseHandle(token);
    return context;
}