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This is Mr Wang's Tech Blog.

C#获得本机的计算机名及IP地址

using System.Net;
String hostInfo =Dns.GetHostName();//获取本机的计算机名
this.ComputerTextBox.Text = hostInfo;
System.Net.IPAddress addr;
addr = new System.Net.IPAddress(Dns.GetHostByName(Dns.GetHostName()).AddressList[0].Address); 
String IPAddress = addr.ToString();//获取本机的IP地址          
 this.ipTextBox.Text = IPAddress;

 

C#知识库 外链列表存档

码农改变世界lyf 的 C#基础知识

C#基础知识-数据类型(一)

C#基础知识-编写第一个程序(二)

C#基础知识-基本的流程控制语句(三)

C#基础知识-流程控制的应用(四)

C#基础知识-函数的定义和调用(五)

C#基础知识-引用类型和值类型的区别(六)

C#基础知识-编程思想之封装(七)

C#基础知识-面向对象思想之继承(八)

C#基础知识-数组_ArrayList_List(九)

C#基础知识-XML介绍及基本操作(十)

C#基础知识-使用XML完成一个小程序(十一)

----------------------------------------------我是分割线-----------------------------

c# 检测操作系统版本

使用C#自动注册自定义文件类型

[转]C#中如何获取其他进程的命令行参数 ( How to get other processes's command line argument )

private static IEnumerable<string> GetCommandLines(string processName)
{
    List<string> results = new List<string>();
    string wmiQuery = string.Format("select CommandLine from Win32_Process where Name='{0}'", processName);
    using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(wmiQuery))
    {
using (ManagementObjectCollection retObjectCollection = searcher.Get())
{
    foreach (ManagementObject retObject in retObjectCollection)
    {
results.Add((string)retObject["CommandLine"]);
    }
}
    }
    return results;
}
static void Main(string[] args)
{
    var result = GetCommandLines("msvsmon.exe");
    Console.Read();
}

任务管理器中实际的参数如下, 该程序或得到3个item的string。

  • WMI的C++例子:
    http://msdn.microsoft.com/zh-cn/aa394558

    http://msdn.microsoft.com/zh-cn/aa389762

 

None 模式Winform鼠标改变窗口大小

const int WM_NCHITTEST = 0x0084;
const int HTLEFT = 10;
const int HTRIGHT = 11;
const int HTTOP = 12;
const int HTTOPLEFT = 13;
const int HTTOPRIGHT = 14;
const int HTBOTTOM = 15;
const int HTBOTTOMLEFT = 0x10;
const int HTBOTTOMRIGHT = 17;
protected override void WndProc(ref Message m)
{
    base.WndProc(ref m);
    switch (m.Msg)
    {
case WM_NCHITTEST:
    Point vPoint = new Point((int)m.LParam & 0xFFFF,
(int)m.LParam >> 16 & 0xFFFF);
    vPoint = PointToClient(vPoint);
    if (vPoint.X <= 5)
if (vPoint.Y <= 5)
    m.Result = (IntPtr)HTTOPLEFT;
else if (vPoint.Y >= ClientSize.Height - 5)
    m.Result = (IntPtr)HTBOTTOMLEFT;
else m.Result = (IntPtr)HTLEFT;
    else if (vPoint.X >= ClientSize.Width - 5)
if (vPoint.Y <= 5)
    m.Result = (IntPtr)HTTOPRIGHT;
else if (vPoint.Y >= ClientSize.Height - 5)
    m.Result = (IntPtr)HTBOTTOMRIGHT;
else m.Result = (IntPtr)HTRIGHT;
    else if (vPoint.Y <= 5)
m.Result = (IntPtr)HTTOP;
    else if (vPoint.Y >= ClientSize.Height - 5)
m.Result = (IntPtr)HTBOTTOM;
    break;
    }
}

 

C#全局热键设置与窗体热键设置实例

1、窗体热键

首先要设置主窗体KeyPreview为true,可直接在属性中进行设置,
或者在窗体加载中设置: this.KeyPreview = true;
然后添加窗体KeyDown事件,如下:

private void FrmMain_KeyDown(object sender, KeyEventArgs e)  
{  
    if (e.Alt && e.Shift && e.Control && e.KeyCode == Keys.S)  
    {  
 MessageBox.Show("我按了Control +Shift +Alt +S");  
    }  
}  

2、全局热键设置

定义API函数 》 注册热键 》 卸载热键

我这里定义了AppHotKey类,全部代码如下:

public class AppHotKey  
{  
        [DllImport("kernel32.dll")]  
        public static extern uint GetLastError();  
        //如果函数执行成功,返回值不为0。  
        //如果函数执行失败,返回值为0。要得到扩展错误信息,调用GetLastError。  
        [DllImport("user32.dll", SetLastError = true)]  
        public static extern bool RegisterHotKey(  
            IntPtr hWnd,                //要定义热键的窗口的句柄  
            int id,                     //定义热键ID(不能与其它ID重复)            
            KeyModifiers fsModifiers,   //标识热键是否在按Alt、Ctrl、Shift、Windows等键时才会生效  
            Keys vk                     //定义热键的内容  
            );  
  
        [DllImport("user32.dll", SetLastError = true)]  
        public static extern bool UnregisterHotKey(  
            IntPtr hWnd,                //要取消热键的窗口的句柄  
            int id                      //要取消热键的ID  
            );  
  
        //定义了辅助键的名称(将数字转变为字符以便于记忆,也可去除此枚举而直接使用数值)  
        [Flags()]  
        public enum KeyModifiers  
        {  
            None = 0,  
            Alt = 1,  
            Ctrl = 2,  
            Shift = 4,  
            WindowsKey = 8  
        }  
        /// <summary>  
        /// 注册热键  
        /// </summary>  
        /// <param name="hwnd">窗口句柄</param>  
        /// <param name="hotKey_id">热键ID</param>  
        /// <param name="keyModifiers">组合键</param>  
        /// <param name="key">热键</param>  
        public static void RegKey(IntPtr hwnd, int hotKey_id, KeyModifiers keyModifiers, Keys key)  
        {  
            try  
            {  
                if (!RegisterHotKey(hwnd, hotKey_id, keyModifiers, key))  
                {  
                    if (Marshal.GetLastWin32Error() == 1409) { MessageBox.Show("热键被占用 !"); }  
                    else  
                    {  
                        MessageBox.Show("注册热键失败!");  
                    }  
                }  
            }  
            catch (Exception) { }  
        }  
        /// <summary>  
        /// 注销热键  
        /// </summary>  
        /// <param name="hwnd">窗口句柄</param>  
        /// <param name="hotKey_id">热键ID</param>  
        public static void UnRegKey(IntPtr hwnd, int hotKey_id)  
        {  
            //注销Id号为hotKey_id的热键设定  
            UnregisterHotKey(hwnd, hotKey_id);  
        }  
}  

重写窗体的WndProc函数,在窗口创建的时候注册热键,窗口销毁时销毁热键,代码如下:

private const int WM_HOTKEY = 0x312; //窗口消息-热键  
private const int WM_CREATE = 0x1; //窗口消息-创建  
private const int WM_DESTROY = 0x2; //窗口消息-销毁  
private const int Space = 0x3572; //热键ID  
protected override void WndProc(ref Message m)  
{  
    base.WndProc(ref m);  
    switch (m.Msg)  
    {  
 case WM_HOTKEY: //窗口消息-热键ID  
     switch (m.WParam.ToInt32())  
     {  
  case Space: //热键ID  
      MessageBox.Show("我按了Control +Shift +Alt +S");  
      break;  
  default:  
      break;  
     }  
     break;  
 case WM_CREATE: //窗口消息-创建  
     AppHotKey.RegKey(Handle, Space, AppHotKey.KeyModifiers.Ctrl | AppHotKey.KeyModifiers.Shift | AppHotKey.KeyModifiers.Alt, Keys.S);  
     break;  
 case WM_DESTROY: //窗口消息-销毁  
     AppHotKey.UnRegKey(Handle, Space); //销毁热键  
     break;  
 default:  
     break;  
    }  
}