C#中怎样自绘按钮

Question

请问大家在C#中怎样自绘按钮呢，鼠标在按钮上方按钮变为红色，鼠标按下变为蓝色，应该怎么实现？
别的控件有DrawItem，但是按钮控件好像没有.谢谢！

Answer 1

有事件啊
buttonclick 等等的

Answer 2

自定义控件,重写onpaint,onmouseclick....等相关事件

Answer 3

 [ToolboxBitmap(typeof(System.Windows.Forms.Button))]
    public partial class Button : System.Windows.Forms.Button
    {
        private State state = State.Normal;
        public Button()
        {
            Font = ControlCommon.Font;
            BackColor = Color.Transparent;
            try
            {
                //打开双缓冲
                this.SetStyle(ControlStyles.DoubleBuffer, true);
                this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
                this.SetStyle(ControlStyles.UserPaint, true);
                this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
                this.SetStyle(ControlStyles.StandardDoubleClick, false);
                this.SetStyle(ControlStyles.Selectable, false);
                this.ResizeRedraw = true;                
            }
            catch { }
        }        //[DefaultValue(Color.Transparent.ToArgb())]
        //public override Color BackColor
        //{
        //    get { return base.BackColor; }
        //    set { base.BackColor = value; }
        //}
        //[DefaultValue(Color.FromArgb(33, 33, 33).ToArgb())]
        //public override Color ForeColor
        //{
        //    get { return base.ForeColor; }
        //    set { base.ForeColor = value; }
        //}
        protected override void OnMouseEnter(EventArgs e)
        {
            state = State.MouseOver;
            this.Invalidate();
            base.OnMouseEnter(e);
        }        protected override void OnMouseLeave(EventArgs e)
        {
            state = State.Normal;
            this.Invalidate();
            base.OnMouseLeave(e);
        }        protected override void OnMouseDown(MouseEventArgs e)
        {
            if ((e.Button & MouseButtons.Left) != MouseButtons.Left) return;            state = State.MouseDown;
            this.Invalidate();
            base.OnMouseDown(e);
        }        protected override void OnMouseUp(MouseEventArgs e)
        {
            if ((e.Button & MouseButtons.Left) == MouseButtons.Left)
                state = State.Normal;
            this.Invalidate();
            base.OnMouseUp(e);
        }        protected override void OnPaint(PaintEventArgs e)
        {
            if (SkinImage.button.img == null)
            {
                base.OnPaint(e);
                return;
            }            int i = (int)state;
            if (this.Focused && state != State.MouseDown) i = 5;
            if (!this.Enabled) i = 4;
            Rectangle rc = this.ClientRectangle;
            Graphics g = e.Graphics;            //重绘控件背景
            base.InvokePaintBackground(this, new PaintEventArgs(e.Graphics, base.ClientRectangle));            SkinDraw.DrawRect2(g, SkinImage.button, rc, i);            Image img = null;
            Size txts, imgs;            txts = Size.Empty;
            imgs = Size.Empty;            if (this.Image != null)
            {
                img = this.Image;
            }
            else if (this.ImageList != null && this.ImageIndex != -1)
            {
                img = this.ImageList.Images[this.ImageIndex];
            }            if (img != null)
            {
                imgs.Width = img.Width;
                imgs.Height = img.Height;
            }            StringFormat format1;
            using (format1 = new StringFormat())
            {
                format1.HotkeyPrefix = HotkeyPrefix.Show;
                SizeF ef1 = g.MeasureString(this.Text, this.Font, new SizeF((float)rc.Width, (float)rc.Height), format1);
                txts = Size.Ceiling(ef1);
            }            rc.Inflate(-4, -4);
            if (imgs.Width * imgs.Height != 0)
            {
                Rectangle imgr = rc;
                imgr = SkinDraw.HAlignWithin(imgs, imgr, this.ImageAlign);
                imgr = SkinDraw.VAlignWithin(imgs, imgr, this.ImageAlign);
                if (!this.Enabled)
                {
                    ControlPaint.DrawImageDisabled(g, img, imgr.Left, imgr.Top, this.BackColor);
                }
                else
                {
                    g.DrawImage(img, imgr.Left, imgr.Top, img.Width, img.Height);
                }
            }            //Rectangle txtr = rc;
            //txtr = SkinDraw.HAlignWithin(txts, txtr, this.TextAlign);
            //txtr = SkinDraw.VAlignWithin(txts, txtr, this.TextAlign);            Brush brush2;
            format1 = new StringFormat();
            format1.HotkeyPrefix = HotkeyPrefix.Show;            if (this.RightToLeft == RightToLeft.Yes)
            {
                format1.FormatFlags |= StringFormatFlags.DirectionRightToLeft;
            }
            brush2 = new SolidBrush(this.ForeColor);
            //if (this.Enabled)
            //{
            //    this.ForeColor = Color.FromArgb(33, 33, 33);
            //}
            //else
            //{
            //    this.ForeColor = Color.FromArgb(200, 200, 200);
            //}
            format1.LineAlignment = StringAlignment.Center;
            format1.Alignment = StringAlignment.Center;
            g.DrawString(this.Text, this.Font, brush2, ClientRectangle, format1);
            brush2.Dispose();
        }
    }