C# 表單邊角圓弧處理及在C#中調用外部程式（執行批處理，開啟視窗等）

1、表單邊角圓弧處理

在表單的Paint事件中或者Resize事件中處理這個過程，具體代碼如下：

private void SetFormCircle()
        {

            int radian = 4;           //圓弧角的比率，可以自己改變這個值看具體的效果
            int w = this.Width;    //表單寬
            int h = this.Height;   //表單高

            //對於矩形的表單，要在一個角上畫個弧度至少需要2個點，所以4個角需要至少8個點

            Point p1 = new Point(radian, 0);
            Point p2 = new Point(w - radian, 0);
            Point p3 = new Point(w, radian);
            Point p4 = new Point(w, h - radian);
            Point p5 = new Point(w - radian, h);
            Point p6 = new Point(radian, h);
            Point p7 = new Point(0, h - radian);
            Point p8 = new Point(0, radian);

            System.Drawing.Drawing2D.GraphicsPath shape = new System.Drawing.Drawing2D.GraphicsPath();

            Point[] p = new Point[] { p1, p2, p3, p4, p5, p6, p7, p8 };
            shape.AddPolygon(p);

            //將表單的顯示地區設為GraphicsPath的執行個體  
            this.Region = new System.Drawing.Region(shape);

       }

2、c#中調用外部程式

比如要開啟一“c:\windows”這個目錄，可以這些做

Process.Start("explorer.exe",@"c:\windows");

要執行一個DOS批處理，可以這樣做

                    //sPath是批次檔的路徑

                    myProcess.StartInfo.FileName = sPath;
                    myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                    myProcess.StartInfo.Verb = "open";
                    myProcess.StartInfo.CreateNoWindow = false;
                    myProcess.StartInfo.UseShellExecute = false;
                    myProcess.Start();