C#常用小技巧

 

先給個網址http://www.dotblogs.com.tw/chou/archive/2009/04/12/7986.aspx

 產生隨機數的類Random

Random r =new Random();

num=r.Next(1,500);//產生一個1-500之間的隨機數。

使用C#實現移動無邊框窗體

如需瞭解更多請上http://hi.baidu.com/nirvanan/blog/item/e6519b501fe2312343a75b55.html

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

 //聲明 API 函數    
        [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)
            {
                //爲當前的應用程序釋放鼠標捕獲
                ReleaseCapture();
                //發送消息，讓系統誤以爲你在標題攔上按下鼠標
                SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
            }
        }

 

C#窗體的最大化/最小化/還原/最小化到托盤/NotifyIcon的代碼實現

1.最小化

WindowState = FormWindowState.Minimized;

//最小化時隱藏窗體

this.Visible=false;

2.最大化

WindowState == FormWindowState.Maximized;

3.還原爲正常

WindowState == FormWindowState.Normal;

4.在托盤顯示

               打開 VS.net的工具箱，然後選擇NotifyIcon,拖到Form上,在屬性中Icon中設置圖象添加一個ContextMenu,輸入需要的選擇項在NotifyIcon中的ContextMenu屬性中可以設置剛添加的ContextMenu 點托盤上的圖標 就可以顯示選擇項  

實例部分代碼:

               #region 還原窗體

               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 最小化窗體並在托盤顯示,隱藏窗體
            private void minForm()
            {
                WindowState = FormWindowState.Minimized;
                this.Visible = false;
                this.notifyIconCMPC.Visible = true;
                this.myTimer.Enabled = false;
                //this.Hide();
                //設置氣球狀工具提示顯示的時間爲10秒
                this.notifyIconCMPC.ShowBalloonTip(30);
            }
            #endregion

               #region          重寫WndProc屏蔽掉關閉按鈕
               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();
                }
            }

 

如何將窗體添加到容器（panel）中

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

 

如何在控件的設計時得到窗體設計器中的所有控件

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)
         {
             //執行其他操作
         }
   }
}

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) { //執行其他操作 } } }