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C# 开发圆角控件(窗体)

关键词:窗体控件圆角开发  阅读(731) 赞(11)

[摘要]最近在做卡片视图的程序,要求将控件做成带有圆角的效果,下面是我在网上查找的资料,经过测试,确定可以实现功能。其中方法三既适应于控件,也适应于窗体。

最近在做卡片视图的程序,要求将控件做成带有圆角的效果,下面是我在网上查找的资料,经过测试,确定可以实现功能。其中方法三既适应于控件,也适应于窗体。

先上传效果图:

方法一:

增加命名空间:using System.Drawing.Drawing2D;  
添加方法如下:当然各角的点可根据需要确定. 

 private void Type(Control sender, int p_1, double p_2)
         {
             GraphicsPath oPath = new GraphicsPath();
             oPath.AddClosedCurve(
                 new Point[] {
             new Point(0, sender.Height / p_1),
             new Point(sender.Width / p_1, 0), 
             new Point(sender.Width - sender.Width / p_1, 0), 
             new Point(sender.Width, sender.Height / p_1),
             new Point(sender.Width, sender.Height - sender.Height / p_1), 
             new Point(sender.Width - sender.Width / p_1, sender.Height), 
             new Point(sender.Width / p_1, sender.Height),
             new Point(0, sender.Height - sender.Height / p_1) },
 
                 (float)p_2);
 
             sender.Region = new Region(oPath);
         }

在窗体的paint和resize事件中增加:Type(this,20,0.1);  
参数20和0.1也可以根据自己的需要调整到最佳效

方法二:

 public void SetWindowRegion()
         {
 
             System.Drawing.Drawing2D.GraphicsPath FormPath;
 
             FormPath = new System.Drawing.Drawing2D.GraphicsPath();
 
             Rectangle rect = new Rectangle(0, 22, this.Width, this.Height - 22);//this.Left-10,this.Top-10,this.Width-10,this.Height-10);                 
 
             FormPath = GetRoundedRectPath(rect, 30);
 
             this.Region = new Region(FormPath);
 
         }
 
         private GraphicsPath GetRoundedRectPath(Rectangle rect, int radius)
         {
 
             int diameter = radius;
 
             Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));
 
             GraphicsPath path = new GraphicsPath();
 
             //   左上角   
 
             path.AddArc(arcRect, 180, 90);
 
             //   右上角   
 
             arcRect.X = rect.Right - diameter;
 
             path.AddArc(arcRect, 270, 90);
 
             //   右下角   
 
             arcRect.Y = rect.Bottom - diameter;
 
             path.AddArc(arcRect, 0, 90);
 
             //   左下角   
 
             arcRect.X = rect.Left;
 
             path.AddArc(arcRect, 90, 90);
 
             path.CloseFigure();
 
             return path;
 
         }

在窗体的resize事件中增加:SetWindowRegion();  

方法三:通过Window系统API行数,修改控件和窗体为椭圆形状。代码如下所示:

 [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);

 protected override void OnPaint(PaintEventArgs e)
         {
             base.OnPaint(e);
 
             IntPtr dc;
             IntPtr region;
 
             dc = GetDC(this.Handle);
             BeginPath(dc);
             SetBkMode(dc, TRANSPARENT);
             Ellipse(dc, 0, 0, this.Width - 3, this.Height - 2);
             EndPath(dc);
             region = PathToRegion(dc);
             SetWindowRgn(this.Handle, region, false);
         }


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