如何实现按钮右上角带数字功能

从_零_开始 2014-05-04 08:57:46

如何实现按钮右上角带数字

功能，如下图

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PaulyJiang 2014-05-15

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引用 21 楼 m1654399928 的回复:

[quote=引用 13 楼 jiangfling 的回复:] 上面的数字图片是画的，如果要显示999你要放那么多图片？

我是要在代码上New一个label(注意不是拖到winform上)，然后将new出来的label添加到指定的控件上，但红色代码部分不起作用。如果是将label直接拖到form上就起作用，求解下面是我的代码 void Addlabel() { var label= new LabelControl { AutoSize = false, Visible = false, Text = "消息", Size = new Size(43, 19) }; label.Paint += label_Paint; } void lc_Paint(object sender, PaintEventArgs e) { lc.Paint -= lc_Paint; lc.Font = new Font("Tahoma", 10F, FontStyle.Bold, GraphicsUnit.Point, 0); //只有这句代码起作用 Graphics g = e.Graphics; var font = new Font("Tahoma", 9F, FontStyle.Bold); g.FillEllipse(Brushes.OrangeRed, 10, 5, 15, 10); g.DrawString(ReplyMessageCount.ToString(), font, Brushes.Green, 10, 3); }[/quote] e.handled =true

assky124 2014-05-06

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一张图片就够了



    internal sealed class MessageNumberGraphics

    {

        private static Image __imgNumbers = null;

        private static Dictionary<int, Image> _imgNumberDict = null;



        static MessageNumberGraphics()

        {

            __imgNumbers = ResourceLoader.GetBitmap("MessageNumbers.png");

            _imgNumberDict = new Dictionary<int, Image>();

            for (int i = 0; i < 10; i++)

            {

                Image img = GetSingleNumberImage(i);

                _imgNumberDict.Add(i, img);

            }

        }



        public static Image GetMessageNumber(int number)

        {

            if (number >= 0)

            {

                int len = number.ToString().Length;

                Bitmap bmp = new Bitmap((len + 1) * 10, 20);

                using (Graphics g = Graphics.FromImage(bmp))

                {

                    Image numberImage = GetNumberImage(number);

                    Image backImage = GetNumberBack(len);

                    g.DrawImage(backImage, Point.Empty);

                    g.DrawImage(numberImage, new Point(5, 0));

                }

                return bmp;

            }

            return null;

        }



        private static Image GetNumberBack(int len)

        {

            Bitmap bmp = new Bitmap((len + 1) * 10, 20);

            using (Graphics g = Graphics.FromImage(bmp))

            {

                g.DrawImage(__imgNumbers, new Rectangle(0, 0, 10, 20), new RectangleF(0, 20, 10, 20), GraphicsUnit.Pixel);

                g.DrawImage(__imgNumbers, new Rectangle(10, 0, (len - 1) * 10, 20), new Rectangle(10, 20, 80, 20), GraphicsUnit.Pixel);

                g.DrawImage(__imgNumbers, new Rectangle(len * 10, 0, 10, 20), new Rectangle(90, 20, 10, 20), GraphicsUnit.Pixel);

            }

            return bmp;

        }



        public static Image GetNumberImage(int number)

        {

            if (number >= 0)

            {

                int len = number.ToString().Length;

                Bitmap bmp = new Bitmap(10 * len, 20);

                using (Graphics g = Graphics.FromImage(bmp))

                {

                    for (int i = 0; i < len; i++)

                    {

                        int single = number % 10;

                        number = number / 10;

                        Image img = _imgNumberDict[single];

                        if (img != null)

                        {

                            g.DrawImage(img, new Rectangle(10 * (len - 1 - i), -1, img.Width, img.Height));

                        }

                    }

                }

                return bmp;

            }

            return null;

        }



        private static Image GetSingleNumberImage(int number)

        {

            if (number >= 0 && number < 10)

            {

                Bitmap bmp = new Bitmap(10, 20);

                using (Graphics g = Graphics.FromImage(bmp))

                {

                    g.DrawImage(__imgNumbers, new Point(-number * 10, 0));

                }

                return bmp;

            }

            return null;

        }

    }