C# 更改 GroupBox 组件中的边框

Changing the border in a GroupBox component

提问by Lahib

Possible Duplicate:
How can I change the border thickness of a Groupbox on a windows form in C#?

可能的重复：
如何在 C# 中更改 Windows 窗体上 Groupbox 的边框粗细？

Guys

伙计们

I am using groupbox' in Visual studio. But the Border in the groupbox is to small. I was wondering if there is a way to edit the border by giving it a color or maybe a thicker edge?

我在 Visual Studio 中使用 groupbox'。但是 groupbox 中的 Border 太小了。我想知道是否有办法通过给它一个颜色或者一个更厚的边缘来编辑边框？

As u can see in the image it is very hard to see the border around it.

正如您在图像中看到的那样，很难看到它周围的边框。

Can anyone help me with this ?

谁能帮我这个 ？

采纳答案by Mohammadreza

You can Use This:

你可以使用这个：

using System.Drawing;

using System.Drawing.Drawing2D;

使用 System.Drawing.Drawing2D;

  private void Form1_Load(object sender, EventArgs e)
    {
        myGroupBox myGroupBox = new myGroupBox();
        myGroupBox.Text = "GroupBox1";

        this.Controls.Add(myGroupBox);

    }




    public static GraphicsPath CreatePath(float x, float y, float width, float height,
                                  float radius, bool RoundTopLeft, bool RoundTopRight, bool RoundBottomRight, bool RoundBottomLeft)
    {
        float xw = x + width;
        float yh = y + height;
        float xwr = xw - radius;
        float yhr = yh - radius;
        float xr = x + radius;
        float yr = y + radius;
        float r2 = radius * 2;
        float xwr2 = xw - r2;
        float yhr2 = yh - r2;

        GraphicsPath p = new GraphicsPath();
        p.StartFigure();

        //Top Left Corner

        if (RoundTopLeft)
        {
            p.AddArc(x, y, r2, r2, 180, 90);
        }
        else
        {
            p.AddLine(x, yr, x, y);
            p.AddLine(x, y, xr, y);

        }

        //Top Edge
        p.AddLine(xr, y, xwr, y);

        //Top Right Corner

        if (RoundTopRight)
        {
            p.AddArc(xwr2, y, r2, r2, 270, 90);
        }
        else
        {
            p.AddLine(xwr, y, xw, y);
            p.AddLine(xw, y, xw, yr);
        }


        //Right Edge
        p.AddLine(xw, yr, xw, yhr);

        //Bottom Right Corner

        if (RoundBottomRight)
        {
            p.AddArc(xwr2, yhr2, r2, r2, 0, 90);
        }
        else
        {
            p.AddLine(xw, yhr, xw, yh);
            p.AddLine(xw, yh, xwr, yh);
        }


        //Bottom Edge
        p.AddLine(xwr, yh, xr, yh);

        //Bottom Left Corner           

        if (RoundBottomLeft)
        {
            p.AddArc(x, yhr2, r2, r2, 90, 90);
        }
        else
        {
            p.AddLine(xr, yh, x, yh);
            p.AddLine(x, yh, x, yhr);
        }

        //Left Edge
        p.AddLine(x, yhr, x, yr);

        p.CloseFigure();
        return p;
    }


    class myGroupBox : GroupBox
    {
        public myGroupBox()
        {
            base.BackColor = Color.Transparent;

        }
        [Browsable(false)]
        public override Color BackColor
        {
            get
            {
                return base.BackColor;
            }
            set
            {
                base.BackColor = value;
            }
        }

        private Color backColor = Color.Transparent;

        public Color ActualBackColor
        {
            get { return this.backColor; }

            set { this.backColor = value; }
        }

        protected override void OnPaint(PaintEventArgs e)
        {

            Size tSize = TextRenderer.MeasureText(this.Text, this.Font);

            Rectangle borderRect = e.ClipRectangle;

            borderRect.Y += tSize.Height / 2;

            borderRect.Height -= tSize.Height / 2;

            GraphicsPath gPath = CreatePath(0, borderRect.Y, (float)(this.Width - 1), borderRect.Height - 1, 5, true, true, true, true);

            e.Graphics.FillPath(new SolidBrush(ActualBackColor), gPath);

            e.Graphics.DrawPath(new Pen(Color.Red), gPath);

            borderRect.X += 6;
            borderRect.Y -= 7;

            e.Graphics.DrawString(this.Text, this.Font, new SolidBrush(this.ForeColor), borderRect);
        }
    }