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改变TabControl的风格有两个方式,1、直接重绘标签及背景;2、重写TabControl控件
1、直接重绘标签及背景
1)设置TabControl属性DrawMode为OwnerDraw
2)添加事件代码
private void tabControl_DrawItem(object sender, DrawItemEventArgs e){ Image imgButton = Mana.Properties.Resources.button;Image imgBJ = Mana.Properties.Resources.bg3;//绘制主控件的背景Rectangle Rect = new Rectangle(0, 0, this.tabControl.Width, this.tabControl.Height);e.Graphics.DrawImage(imgBJ, Rect);//新建一个StringFormat对象,用于对标签文字的布局设置StringFormat StrFormat = new StringFormat();StrFormat.LineAlignment = StringAlignment.Center;// 设置文字垂直方向居中StrFormat.Alignment = StringAlignment.Center;// 设置文字水平方向居中 SolidBrush bruFont = new SolidBrush(Color.FromArgb(255, 255, 255));// 标签字体颜色Font font = new System.Drawing.Font("微软雅黑", 10F, FontStyle.Bold);//设置标签字体样式//绘制标签样式 for (int i = 0; i < tabControl.TabPages.Count; i++){//获取标签头的工作区域Rectangle recChild = tabControl.GetTabRect(i);Rectangle newRect = new Rectangle(recChild.Left - 7, recChild.Top, recChild.Width - 7, recChild.Height);//绘制标签头背景颜色e.Graphics.DrawImage(imgButton, newRect);//绘制标签头的文字e.Graphics.DrawString(tabControl.TabPages[i].Text, font, bruFont, newRect, StrFormat);}Console.WriteLine("tabControl_DrawItem"+" "+countTest .ToString ());countTest++;}
2、重写TabControl控件
重写TabControl控件可以改变其背景为透明或绘制背景图,绘制标签风格等各种,但是有一个问题是,在X64编辑环境下,重写的控件无法直接拖拽到界面进行设计,只能通过设计器代码InitializeComponent()中将原先用的this.tabControl = new System.Windows.Forms.TabControl();改为this.tabControl = new TabControlEx();,此时,则不能打开设计界面,会报错,但是仍然有效
重写控件代码(拷贝的网上的):
public class TabControlEx : TabControl{private Color _BackColor; //背景颜色public TabControlEx(){this.SetStyle(ControlStyles.UserPaint, true);//用户自己绘制this.SetStyle(ControlStyles.ResizeRedraw, true);this.SetStyle(ControlStyles.AllPaintingInWmPaint, true); //this.SetStyle(ControlStyles.OptimizedDoubleBuffer, true);//让控件支持透明色this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);this.UpdateStyles();}public override Color BackColor{//重写backcolor属性 get{return this._BackColor;}set{this._BackColor = value;}}protected override void OnPaint(PaintEventArgs e){this.DrawTitle(e.Graphics);base.OnPaint(e);}protected virtual void DrawTitle(Graphics g){Image imgButton = OcvMana.Properties.Resources.button;StringFormat sf = new StringFormat();sf.Alignment = StringAlignment.Center;sf.LineAlignment = StringAlignment.Center;Font font = new System.Drawing.Font("微软雅黑", 10F, FontStyle.Bold);//设置标签字体样式using (SolidBrush sb = new SolidBrush(Color.FromArgb(127, 0, 0, 0))){for (int i = 0; i < this.TabPages.Count; i++){Rectangle rect = this.GetTabRect(i);Rectangle newRect = new Rectangle(rect.Left + 7, rect.Top, rect.Width - 7, rect.Height);g.DrawImage(imgButton, newRect);g.DrawString(this.TabPages[i].Text, font, Brushes.White, rect, sf);}}}}
此时New 了新的控件后,直接调试运行发现TabPage页仍然不透明,可在页面Load事件中设置选中第一个页面的同时设置其背景色为透明或其他颜色,代码如下:
this.tabControl.SelectedTab = tp1; //选择要显示页面1
tp1.BackColor = Color.FromArgb(0, 255, 255, 255); //设置页面1的背景透明
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