c# winform 应用编程代码总结 1

1、渐显的窗体

     放一个定时器Interval 设置为100 ， 在响应的函数中添加

        private void Form1_Load(object sender, System.EventArgs e)

        {
            this.timer1.Enabled=true;
            this.Opacity=0;
        }

        private void timer1_Tick(object sender, System.EventArgs e)
        {
            if(this.Opacity<1)
            {
                this.Opacity=this.Opacity+0.05;
            }
            else
            {
                this.timer1.Enabled=false;
            }

        }

2、设置顶级窗口

       把TopMost 、 TopLevel 都设置为true就OK了！

3、设置一个多边形的窗口

     引入要使用的函数

[DllImport("gdi32")]
private static extern IntPtr CreatePolygonRgn(Point[] lpPoint,int nCount,int nPolyFillMode);
[DllImport("user32")]
private static extern IntPtr SetWindowRgn(IntPtr hWnd,IntPtr hRgn,bool bRedraw);

       在窗口load的时候设置形状！

            Point[] pt={
                            new Point(this.Width /2,0),
                            new Point(0,this.Height/2),
                            new Point(this.Width/2,this.Height),
                            new Point(this.Width,this.Height/2),
                            new Point(this.Width,0)
                        };

            
            IntPtr m_rgn;
            m_rgn=CreatePolygonRgn(pt,5,WINDING);
            SetWindowRgn(this.Handle,m_rgn,true);

4、设置圆形窗口

        [System.Runtime.InteropServices.DllImport("gdi32")]
        private static extern IntPtr BeginPath(IntPtr hdc);
        [System.Runtime.InteropServices.DllImport("gdi32")]
        private static extern int SetBkMode(IntPtr hdc,int nBkMode);
        const int TRANSPARENT = 1;
        [System.Runtime.InteropServices.DllImport("gdi32")]
        private static extern IntPtr EndPath(IntPtr hdc);
        [System.Runtime.InteropServices.DllImport("gdi32")]
        private static extern IntPtr PathToRegion(IntPtr hdc);
        [System.Runtime.InteropServices.DllImport("gdi32")]
        private static extern int Ellipse(IntPtr hdc, int X1,int Y1, int X2,int Y2);
        [System.Runtime.InteropServices.DllImport("user32")]
        private static extern IntPtr SetWindowRgn(IntPtr hwnd,IntPtr hRgn,bool bRedraw);
        [System.Runtime.InteropServices.DllImport("user32")]
        private static extern IntPtr GetDC(IntPtr hwnd);
        private void Form1_Load(object sender, System.EventArgs e)
        {
            IntPtr dc;
            IntPtr region;
            dc=GetDC(this.Handle); 
            BeginPath(dc);
            //根据路径创建不规则窗体
            SetBkMode(dc,TRANSPARENT);
            //设置为透明模式
            Ellipse(dc,20,20,220,220);
            EndPath(dc);
            region=PathToRegion(dc);
            SetWindowRgn(this.Handle,region,true);        
        }

    const int WM_NCHITTEST = 0x0084;
    const int HTCLIENT = 0x0001;
    const int HTCAPTION = 0x0002;
    protected override void WndProc(ref System.Windows.Forms.Message m)
        {
            switch(m.Msg)
            {
                case WM_NCHITTEST:
                    base.WndProc(ref m);
                    if (m.Result==(IntPtr)HTCLIENT)
                        m.Result=(IntPtr)HTCAPTION;
                    break;
                default:
                    base.WndProc(ref m);
                    break;
            }

        }
    }

5 、渐变的窗口背景

      private void Form1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
     {
            Graphics g=e.Graphics;
            Color FColor=Color.Blue;
            Color TColor=Color.Yellow;
            Brush b =new LinearGradientBrush(this.ClientRectangle, FColor, TColor, LinearGradientMode.ForwardDiagonal);
            g.FillRectangle(b,this.ClientRectangle);
      }

      private void Form1_Resize(object sender, System.EventArgs e)
      {
            this.Invalidate();
      }

6、无标题窗口的拖动

        [DllImport("user32.dll")]

        public static extern bool ReleaseCapture();
        [DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hwnd,int wMsg,int wParam,int lParam);
                                                                                                                                                         
        public const int WM_SYSCOMMAND=0x0112;
        public const int SC_MOVE=0xF010;
        public const int HTCAPTION=0x0002;
        
        private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            ReleaseCapture();
            SendMessage(this.Handle,WM_SYSCOMMAND,SC_MOVE+HTCAPTION, 0); 

        }

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作者：RyanDing