Question

我正在使用C＃和winform应用程序.net版本3.5和Vs 2008

我如何创建具有圆边的自定义面板？我们如何在不同项目中使用该控件？

Answer 1

您必须覆盖OnPaint事件并使用GraphicPath对象绘制角点。

看一下这篇文章：http://www.switchonthecode.com/tutorials/csharp-creating-rounded-rectangles-using-a-graphics-path

Answer 2

您可以使用GDI +隐藏面板边缘并绘制带圆角的新边缘。

这是一个example。

Answer 3

在MLablanc's link之后，我将代码转换为C＃：

public class RoundedPanel : Panel {
    private float _thickness = 5;
    public float Thickness {
        get {
            return _thickness;
        }
        set {
            _thickness = value;
            _pen = new Pen(_borderColor,Thickness);
            Invalidate();
        }
    }

    private Color _borderColor = Color.White;
    public Color BorderColor {
        get {
            return _borderColor;
        }
        set {
            _borderColor = value;
            _pen = new Pen(_borderColor,Thickness);
            Invalidate();
        }
    }

    private int _radius = 20;
    public int Radius {
        get {
            return _radius;
        }
        set {
            _radius = value;
            Invalidate();
        }
    }

    private Pen _pen;

    public MpRoundedPanel() : base() {
        _pen = new Pen(BorderColor,Thickness);
        DoubleBuffered = true;            
    }
    private Rectangle GetLeftUpper(int e) {
        return new Rectangle(0,0,e,e);
    }
    private Rectangle GetRightUpper(int e) {
        return new Rectangle(Width - e,0,e,e);
    }
    private Rectangle GetRightLower(int e) {
        return new Rectangle(Width - e,Height - e,e,e);
    }
    private Rectangle GetLeftLower(int e) {
        return new Rectangle(0,Height - e,e,e);
    }

    private void ExtendedDraw(PaintEventArgs e) {
        e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
        GraphicsPath path = new GraphicsPath();
        path.StartFigure();
        path.AddArc(GetLeftUpper(Radius),180,90);
        path.AddLine(Radius,0,Width - Radius,0);
        path.AddArc(GetRightUpper(Radius),270,90);
        path.AddLine(Width,Radius,Width,Height - Radius);
        path.AddArc(GetRightLower(Radius),0,90);
        path.AddLine(Width - Radius,Height,Radius,Height);
        path.AddArc(GetLeftLower(Radius),90,90);
        path.AddLine(0,Height - Radius,0,Radius);
        path.CloseFigure();
        Region = new Region(path);
    }
    private void DrawSingleBorder(Graphics graphics) {
        graphics.DrawArc(_pen,new Rectangle(0,0,Radius,Radius),180,90);
        graphics.DrawArc(_pen,new Rectangle(Width - Radius - 1,-1,Radius,Radius),270,90);
        graphics.DrawArc(_pen,new Rectangle(Width - Radius - 1,Height - Radius - 1,Radius,Radius),0,90);
        graphics.DrawArc(_pen,new Rectangle(0,Height - Radius - 1,Radius,Radius),90,90);
        graphics.DrawRectangle(_pen,0.0f,0.0f,(float)Width - 1.0f,(float)Height - 1.0f);
    }
    private void Draw3DBorder(Graphics graphics) {
        DrawSingleBorder(graphics);
    }
    private void DrawBorder(Graphics graphics) {
        DrawSingleBorder(graphics);
    }
    protected override void OnPaint(PaintEventArgs e) {
        base.OnPaint(e);
        ExtendedDraw(e);
        DrawBorder(e.Graphics);
    }
}

要使用该类，只需在您的项目或同一文件中包含该类，您就必须声明一个Panel并使用RoundedPanel。

Answer 4

快速谷歌

winforms创建一个带圆角的自定义面板

作为第一个结果返回以下内容：

C# Form with custom border and rounded edges

要在其他项目中使用它，请将面板创建为UserControl，而不是窗口。

带圆角的面板

4 个答案: