先給 python 程式…

import socket

host = YOUR_HOST_ADDRESS # ‘localhost’ or ’127.0.0.1′ for local machine, IP_ADDRESS for remote machine
port = YOUR_PORT_NUMBER_OF_MAYA

maya = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
maya.connect( (host, port) )

message = ‘sphere()’
maya.send(message)
maya.close()

C# 用 socket connection

Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
s.Connect(YOUR_HOST_ADDRESS, YOUR_PORT_NUMBER_OF_MAYA);

string strCmd = “sphere()”;
byte[] buf = System.Text.Encoding.Default.GetBytes(strCmd);

NetworkStream ns = new NetworkStream(s);

ns.Write(buf, 0, buf.Length);
ns.Flush();
ns.Close();

s.Close();

C# 用 Tcp client connection 的話也差不多

TcpClient tc = new TcpClient();
tc.Connect(YOUR_HOST_ADDRESS, YOUR_PORT_NUMBER_OF_MAYA);

string strCmd = “sphere()”;
byte[] buf = System.Text.Encoding.Default.GetBytes(strCmd);

NetworkStream ns = tc.GetStream();

ns.Write(buf, 0, buf.Length);
ns.Flush();
ns.Close();

tc.Close();

比較需要注意的大概是 commandPort 命令的用法。

如果是使用

commandPort -echoOutput -n “:6000″;

則會會開 port 6000 並 bind 在 127.0.0.1 上，這時候如果是要從 remote 機器上來控制就會 connection refused。

如果是使用

commandPort -echoOutput -n “YOUR_IP_ADDRESS:6000″;

則會會開 port 6000 並 bind 在 YOUR_IP_ADDRESS 上，這時候如果從本機用 localhost 來控制會 connection refused，但是用 YOUR_IP_ADDRESS 則不會有問題。

最簡單的解決方式是

commandPort -echoOutput -n “0.0.0.0:6000″;

這樣不論是本機或者 remote 機器來控制 Maya 做事情都可以很順利。

StringBuilder sb = new StringBuilder();
XmlWriter writer = XmlWriter.Create(sb);

writer.WriteStartDocument();
//補上 xml 內容, 用 writer.WriteStartElement() 等完成
writer.WriteEndDocument();

writer.Flush();

XmlDocument xmlDocument = new XmlDocument();
xmlDocument.LoadXml(sb.ToString());

但是可以發現到這樣子所輸出的 XML 文件是變成 UTF-16 encoding。雖然有 XmlWriterSettings 這東西可以去設定 XMLWriter 的編碼，不過看起來好像是有些問題，輸出的 XML 結果依舊是 UTF-16。

解決的方法是用 MemoryStream 與 XMLTextWriter。

MemoryStream stream = new MemoryStream();
XmlWriter writer = new XmlTextWriter(stream, Encoding.UTF8);

writer.WriteStartDocument();
//補上 xml 內容, 用 writer.WriteStartElement() 等完成
writer.WriteEndDocument();

writer.Flush();

StreamReader reader = new StreamReader(stream, Encoding.UTF8, true);
stream.Seek(0, SeekOrigin.Begin);
string result = reader.ReadToEnd();

XmlDocument xmlDocument = new XmlDocument();
xmlDocument.LoadXml(result);

Unix Timestamp 的定義為目前 UTC 時間減去 Unix epoch 起始時間(1970/1/1 0:0:0 UTC)所得到的秒數。(Ref: Unix time)

private double UnixTimestamp(DateTime _datetime)
{
    //Unix Epoch: 1970/1/1 0:0:0
    TimeSpan span = (_datetime - new DateTime(1970, 1, 1, 0, 0, 0, 0).ToLocalTime());

    return (double)span.TotalSeconds;
} 

using System.Web.Script.Serialization;
using System.Collections;
using System.IO;

private void ProcessFBJSON()
{
    JavaScriptSerializer jss = new JavaScriptSerializer();

    string json;

    StreamReader sr = new StreamReader(@"C:\file.txt", Encoding.Default);
    json = sr.ReadToEnd();
    sr.Close();

    Dictionary dicSer = jss.Deserialize>(json);

    traceDic(dicSer);
}

private void traceDic(Dictionary dic)
{
    foreach (KeyValuePair p in dic)
    {
        if (p.Value is String)
        {
            textBox1.Text = textBox1.Text + p.Key + ": " + p.Value + "\r\n";
        }
        else if (p.Value is ArrayList)
        {
            textBox1.Text = textBox1.Text + p.Key + ": {\r\n";
            traceArrayList((ArrayList)(p.Value));
            textBox1.Text = textBox1.Text + "}\r\n";
        }
        else if (p.Value is Dictionary)
        {
            textBox1.Text = textBox1.Text + p.Key + ": [{\r\n";
            traceDic((Dictionary)(p.Value));
            textBox1.Text = textBox1.Text + "}]\r\n";
        }
        else if (p.Value is int || p.Value is float || p.Value is double)
        {
            textBox1.Text = textBox1.Text + p.Key + ": " + p.Value.ToString() + "\r\n";
        }
        else
        {
            MessageBox.Show("dictionary: " + p.Value.GetType().ToString());
        }
    }
}

private void traceArrayList(ArrayList al)
{
    for (int i = 0; i < al.Count; i++)
    {
        if (al[i] is String)
        {
            textBox1.Text = textBox1.Text + "   " + al[i].ToString() + "\r\n";
        }
        else if (al[i] is Dictionary)
        {
            traceDic((Dictionary)(al[i]));
        }
        else
        {
            MessageBox.Show("arrlist: " + al[i].GetType().ToString());
        }
    }
}

Environment.UserName

取得帳號等有儲存在本機上的資訊

using System.Security.Principal;
using System.Threading;

//-----

AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);

WindowsPrincipal myPrincipal = (WindowsPrincipal)Thread.CurrentPrincipal;

WindowsIdentity myIdentity = (WindowsIdentity)myPrincipal.Identity;

Console.WriteLine("IdentityType: " + myIdentity.ToString());
Console.WriteLine("Name: {0}", myIdentity.Name);
Console.WriteLine("Member of Users? {0}", myPrincipal.IsInRole(WindowsBuiltInRole.User));
Console.WriteLine("Member of Administrators? {0}", myPrincipal.IsInRole(WindowsBuiltInRole.Administrator));
Console.WriteLine("Authenticated: {0}", myIdentity.IsAuthenticated);
Console.WriteLine("Anonymous: {0}", myIdentity.IsAnonymous);

取得帳號等有儲存在本機上的資訊 – II

使用 Win32 API

using System.Runtime.InteropServices;

//-----
[DllImport("Advapi32.dll", EntryPoint="GetUserName",  ExactSpelling=false, SetLastError=true)]
static extern bool GetUserName([MarshalAs(UnmanagedType.LPArray)] byte[] lpBuffer,
						[MarshalAs(UnmanagedType.LPArray)] Int32[] nSize );

//-----
byte[] str = new byte[256];
Int32[] len = new Int32[1];
len[0] = 256;
GetUserName(str, len);
MessageBox.Show(System.Text.Encoding.ASCII.GetString(str));

string a = System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString();

MessageBox.Show(a.ToString());

LDAP

這是可以取得最詳細資訊的方法

using System.DirectoryServices;

//-----

string principal = Environment.UserName;
string filter = string.Format("(&(ObjectClass={0})(sAMAccountName={1}))", "person", principal);
string[] properties = new string[] { "fullname" };

//用匿名登入，理論上LDAP都會允許，但只有 read 權限
DirectoryEntry adRoot = new DirectoryEntry("LDAP://yourdomain.com", null, null, AuthenticationTypes.Secure);
DirectorySearcher searcher = new DirectorySearcher(adRoot);
searcher.SearchScope = SearchScope.Subtree;
searcher.ReferralChasing = ReferralChasingOption.All;
searcher.PropertiesToLoad.AddRange(properties);
searcher.Filter = filter;
SearchResult result = searcher.FindOne();
DirectoryEntry directoryEntry = result.GetDirectoryEntry();

string displayName = directoryEntry.Properties["displayName"][0].ToString();
string firstName = directoryEntry.Properties["givenName"][0].ToString();
string lastName = directoryEntry.Properties["sn"][0].ToString();
string email = directoryEntry.Properties["mail"][0].ToString();
string department = directoryEntry.Properties["department"][0].ToString();
string description = directoryEntry.Properties["description"][0].ToString();

This article is interleaved with Chinese and English.

本來還想在網路上看能不能找到答案的, 結果只有找到一些可能的提示… 不過最後還是摸索出來了啦

At the beginning, I hope to scrounge the solution from Internet, but after hours of searching, I only find some possible hints. Anyway, here’s the solution.

之所以會想要弄這樣的功能，是因為要做出類似在檔案總管中用拖曳選取時有半透明選取區域的效果。但是如果在 window form 中匯製矩形時，會發現這個矩形區域會被其他的控制項壓在下面，使得這個半透明的效果變得很奇怪(如下圖).

This issue is caused by I wanna make a semi-transparent selection area in a window form, just what we usually use in windows file manager. However, if we just draw a rectangle in a window form, this rectangle will be “overlayed” by other controls, just like the figure below. Yep, quite weird.

而我想要的效果是如下圖這樣的, 半透明的選取區域壓在控制項上方.

The figure below is what I really want is a semi-transparent selection region overlays other controls.

最開始的時候我的想法是做一個透明的 Panel, 同時給定顏色，然後隨著滑鼠拖曳動態地去調整大小。結果我在網路上找到了製作透明 Panel 的方法(程式碼如下)，但，很遺憾地，對這個透明 Panel 指定顏色還不能達到我想要的效果。

My first trial is creating a transparent Panel and assign some color onto in, and adjust the size as mouse dragging and moving. I scrounged a transparent panel solution from Internet (source code as below), but, unfortunately, assigning color onto it still does not meet what I want.

public class TransparentPanel : System.Windows.Forms.Panel
{
    public TransparentPanel()
    {
    }

    protected override System.Windows.Forms.CreateParams CreateParams
    {
        get
        {
            System.Windows.Forms.CreateParams createParams = base.CreateParams;
            createParams.ExStyle |= 0x00000020; // WS_EX_TRANSPARENT

            return createParams;
        }
    }

    protected override void OnPaintBackground(System.Windows.Forms.PaintEventArgs e)
    {
        // Do not paint background.
    }
}

那, 在這個透明的 panel 上頭畫一個半透明的矩形呢? 似乎有點可行, 但是在滑鼠拖曳移動時會變得很糟糕, 留下許多殘像.

Well, how about drawing a semi-transparent rectangle on the transparent panel? Sounds reasonable, but there are lots of afterimages while mouse dragging and moving.

//draw a semi-transparent rectangle by adjusting the alpha value of Color.FromArgb function.
Rectangle rec = new Rectangle(topLeftRec, howBig);
Graphics.FillRectangle(new SolidBrush(Color.FromArgb(150, 255, 255, 0)), rec);

後來看到一些提示之後找到了解法，必須透過控制項的 Paint event 來把這個矩形匯製出來。雖然還不是很清楚為什麼要這樣做，但感覺起來是把這個矩形的匯製的動作跟著控制項匯製的動作綁在一起。藉由改變 transparent panel 的大小與位置來觸發 Paint event.

Finally, with some hints on Internet, I find the solution — painting the rectangle as a control’s paint event is triggered. Although I still do not fully understand the reason why I have to follow this process, I think it might require combining drawing rectangle with the control’s paint process. By changing the size and location of the transparent panel, the Paint event can be triggered.

private void pTransparent_Paint(object sender, PaintEventArgs e)
{
    base.OnPaint(e);
    Graphics dc = e.Graphics;

    Pen blackPen = new Pen(Color.Black, 1);
    Point topLeftRec = new Point(e.ClipRectangle.X, e.ClipRectangle.Y);
    Size howBig = new Size(e.ClipRectangle.Width, e.ClipRectangle.Height);
    Rectangle rec = new Rectangle(topLeftRec, howBig);

    Console.WriteLine(topLeftRec.ToString());

    dc.DrawRectangle(blackPen, rec);
    dc.FillRectangle(new SolidBrush(Color.FromArgb(150, 255, 255, 0)), rec);
    blackPen.Dispose();
}

private Rectangle drawrect;
private bool md = false;
private Point startpoint, drawtopleft;
private Size drawsize;

private void flowLayoutPanel1_MouseMove(object sender, MouseEventArgs e)
{
    if (md == true)  //md is a boolean variable representing in mouse dragging mode or not.
    {
        drawtopleft.X = Math.Min(startpoint.X, e.X);
        drawtopleft.Y = Math.Min(startpoint.Y, e.Y);

        drawsize.Width = Math.Abs(startpoint.X - e.X);
        drawsize.Height = Math.Abs(startpoint.Y - e.Y);

        drawrect = new Rectangle(drawtopleft, drawsize);
        ((FlowLayoutPanel)sender).Refresh();

        pTransparent.Width = drawrect.Width;
        pTransparent.Height = drawrect.Height;
        pTransparent.Left = drawtopleft.X;
        pTransparent.Top = drawtopleft.Y;
        }
    }
}

@echo off
rem 定義 ADSL 撥號名稱, ID, Password
set adsl=預先設置號的ADSL撥號名稱
set adslid=YOUR_ID
set adslpw=YOUR_PASSWORD

:start
rem 斷線 / disconnect
Rasdial %adsl% /disconnect

rem 撥號連線 / dial
Rasdial %adsl% %adslid% %adslpw%

Official Classification / 官方分級制度

VDP 組織

Großes Gewächs & Erstes Gewächs / Great Growth & First Growth