.net圓形按鈕的實現

一.設計時效果

二.運行時效果

三.簡單的實現思路

  因爲在最近的項目中要用到類似效果的控件,所以就索性做了一個.原理很簡單,實現的代碼不超過250行.繼承control類,然後在onpaint方法中來繪製按鈕效果,指定Region,同時,要在Onmousedown,Onmouseenter,Onmouseup,Onmouseleave,OnResize,OnLostFocus等方法中做一些相應的處理.

四.部分源代碼 

 

 protected override void OnLostFocus(EventArgs e)
        {
            base.OnLostFocus(e);
            this._isEnter = false;
            this.Invalidate();
        }
        protected override void OnMouseDown(MouseEventArgs e)
        {
            base.OnMouseDown(e);
            this.Capture = true;
            _isEnter = true;
            this._mouseStyle = MouseStyle.MouseDown;
            this.Invalidate();
            if (e.Button == MouseButtons.Left)
            {
                if (this.ButtonClick != null)
                    this.ButtonClick();
            }
        }
        protected override void OnMouseHover(EventArgs e)

          y=''none''; document.getElementById(''_657_787_Open_Text'').style.display=''none''; document.getElementById(''_657_787_Closed_Image'').style.display=''inline''; document.getElementById(''_657_787_Closed_Text'').style.display=''inline'';" align="top" alt="" src="http://images.csdn.net/syntaxhighlighting/OutliningIndicators/ExpandedBlockStart.gif" />        {
            base.OnMouseHover(e);
            this._mouseStyle = MouseStyle.MouseHover;
            this.Invalidate(); 
        }
        protected override void OnMouseUp(MouseEventArgs e)
        {
            base.OnMouseUp(e);
            this._mouseStyle = MouseStyle.MouseHover;
            this.Invalidate(); 
        }
        protected override void OnMouseEnter(EventArgs e)
        {
            base.OnMouseEnter(e);
            this._mouseStyle = MouseStyle.MouseHover;
            this.Invalidate(); 
        }
        protected override void OnMouseLeave(EventArgs e)
        {
            base.OnMouseLeave(e);
            this._mouseStyle = MouseStyle.None;
            this.Invalidate(); 
        }
        protected override void OnResize(EventArgs e)
        {
            base.OnResize(e);
            this.Height = this.Width;
        }