C# · 12月 29, 2021

C#更改tabControl选项卡颜色的方法

本文实例讲述了C#更改tabControl选项卡颜色的方法。分享给大家供大家参考,具体如下:

private void Form1_Load(object sender,EventArgs e){ this.tabControl1.DrawMode = System.Windows.Forms.TabDrawMode.OwnerDrawFixed; this.tabControl1.DrawItem += new DrawItemEventHandler(this.tabControl1_DrawItem);}private void tabControl1_DrawItem(object sender,System.Windows.Forms.DrawItemEventArgs e){ StringFormat sf = new StringFormat(); sf.LineAlignment = StringAlignment.Center; sf.Alignment = StringAlignment.Center; if (e.Index == tabControl1.SelectedIndex) e.Graphics.FillRectangle(Brushes.Red,e.Bounds.X,e.Bounds.Y,e.Bounds.Width,e.Bounds.Height); else e.Graphics.FillRectangle(Brushes.White,e.Bounds.Height); e.Graphics.DrawString(((TabControl)sender).TabPages[e.Index].Text,System.Windows.Forms.SystemInformation.MenuFont,new SolidBrush(Color.Black),e.Bounds,sf);}

1.在Form类的构造函数中添加下列语句:

this.tabControl1.DrawMode = System.Windows.Forms.TabDrawMode.OwnerDrawFixed;this.tabControl1.DrawItem += new DrawItemEventHandler(this.tabControl1_DrawItem);

2.实现下列函数:

private void tabControl1_DrawItem(object sender,System.Windows.Forms.DrawItemEventArgs e){ Font fntTab; Brush bshBack; Brush bshFore; if ( e.Index == this.tabControl1.SelectedIndex) { fntTab = new Font(e.Font,FontStyle.Bold); bshBack = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds,SystemColors.Control,System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal); bshFore = Brushes.Black; } else { fntTab = e.Font; bshBack = new SolidBrush(Color.Blue ); bshFore = new SolidBrush(Color.Black); } string tabName = this.tabControl1.TabPages[e.Index].Text; StringFormat sftTab = new StringFormat(); e.Graphics.FillRectangle(bshBack,e.Bounds); Rectangle recTab = e.Bounds; recTab = new Rectangle( recTab.X,recTab.Y + 4,recTab.Width,recTab.Height – 4); e.Graphics.DrawString(tabName,fntTab,bshFore,recTab,sftTab);}

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