C#常用小技巧（陆续更新）

先给个网址http://www.dotblogs.com.tw/chou/archive/2009/04/12/7986.aspx

 产生随机数的类Random

Random r =new Random();

num=r.Next(1,500);//产生一个1-500之间的随机数。

使用C#实现移动无边框窗体

如需了解更多请上http://hi.baidu.com/nirvanan/blog/item/e6519b501fe2312343a75b55.html

http://blog.163.com/linyongtang1000/blog/static/12033843220096225744977/

 //声明 API 函数    
        [DllImport("User32.dll", EntryPoint = "SendMessage")]
        private static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
        [DllImport("User32.dll", EntryPoint = "ReleaseCapture")]
        public static extern int ReleaseCapture();
        private const int WM_SYSCOMMAND = 0x0112;
        internal const int SC_MOVE = 0xF010;
        private const int HTCAPTION = 2;

 

private void MainForm_MouseDown(object sender, MouseEventArgs e)
        {
            if(MouseButtons.Left == e.Button)
            {
                //为当前的应用程序释放鼠标捕获
                ReleaseCapture();
                //发送消息，让系统误以为你在标题拦上按下鼠标
                SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
            }
        }

 

C#窗体的最大化/最小化/还原/最小化到托盘/NotifyIcon的代码实现

1.最小化

WindowState = FormWindowState.Minimized;

//最小化时隐藏窗体

this.Visible=false;

2.最大化

WindowState == FormWindowState.Maximized;

3.还原为正常

WindowState == FormWindowState.Normal;

4.在托盘显示

               打开 VS.net的工具箱，然后选择NotifyIcon,拖到Form上,在属性中Icon中设置图象添加一个ContextMenu,输入需要的选择项在NotifyIcon中的ContextMenu属性中可以设置刚添加的ContextMenu 点托盘上的图标 就可以显示选择项  

实例部分代码:

               #region 还原窗体

               private void normalForm()
               {
                   //this.AutoScaleBaseSize = new System.Drawing.Size(5, 15);
                   //this.ClientSize = new System.Drawing.Size(504, 267);
                   this.Visible = true;
                   //this.WindowState=FormWindowState.Normal;
               }
               #endregion

            #region 最小化窗体并在托盘显示,隐藏窗体
            private void minForm()
            {
                WindowState = FormWindowState.Minimized;
                this.Visible = false;
                this.notifyIconCMPC.Visible = true;
                this.myTimer.Enabled = false;
                //this.Hide();
                //设置气球状工具提示显示的时间为10秒
                this.notifyIconCMPC.ShowBalloonTip(30);
            }
            #endregion

               #region          重写WndProc屏蔽掉关闭按钮
               protected override void WndProc(ref Message m)
               {
                   const int WM_SYSCOMMAND = 0x0112;
                   const int SC_CLOSE = 0xF060;
                   if (m.Msg == WM_SYSCOMMAND && (int)m.WParam == SC_CLOSE)
                   {
                      this.Visible = false;
                      return;
                   }
                   base.WndProc(ref m);
               }
               #endregion

            private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
            {
                if (this.WindowState == FormWindowState.Minimized || this.Visible == false)
                {
                    this.normalForm();
                }
                else
                {
                    minForm();
                }
            }

 

如何将窗体添加到容器（panel）中

from2 = new Form2(this);
from2.TopLevel = false;
from2.Parent = panel1;
from2.Show();

 

如何在控件的设计时得到窗体设计器中的所有控件

public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value) { IContainer ic = context.Container; foreach (IComponent cp in ic.Components) { if (cp is TextBox) { //执行其他操作 } } }