C# TabControl 頁籤切換 顏色改變［C# TabControl Color］

 

資料來源：https://stackoverflow.com/questions/5338587/set-tabpage-header-color
https://www.codeproject.com/Articles/6112/Selected-TabPage-style-in-Winform-Tab-Control

GITHUB: https://github.com/jash-git/CS_TabControl_Color

 

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace SelectedTabPage
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.TabControl tabControl1;
private System.Windows.Forms.TabPage tabPage1;
private System.Windows.Forms.TabPage tabPage2;
private System.Windows.Forms.TabPage tabPage3;
private System.Windows.Forms.TabPage tabPage4;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
this.tabControl1.DrawMode = System.Windows.Forms.TabDrawMode.OwnerDrawFixed;
this.tabControl1.DrawItem += new DrawItemEventHandler(this.tabControl1_DrawItem);
//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support – do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.tabControl1 = new System.Windows.Forms.TabControl();
this.tabPage1 = new System.Windows.Forms.TabPage();
this.tabPage2 = new System.Windows.Forms.TabPage();
this.tabPage3 = new System.Windows.Forms.TabPage();
this.tabPage4 = new System.Windows.Forms.TabPage();
this.tabControl1.SuspendLayout();
this.SuspendLayout();
//
// tabControl1
//
this.tabControl1.Controls.Add(this.tabPage1);
this.tabControl1.Controls.Add(this.tabPage2);
this.tabControl1.Controls.Add(this.tabPage3);
this.tabControl1.Controls.Add(this.tabPage4);
this.tabControl1.Location = new System.Drawing.Point(16, 24);
this.tabControl1.Name = “tabControl1”;
this.tabControl1.SelectedIndex = 0;
this.tabControl1.Size = new System.Drawing.Size(312, 208);
this.tabControl1.TabIndex = 0;
//
// tabPage1
//
this.tabPage1.Location = new System.Drawing.Point(4, 22);
this.tabPage1.Name = “tabPage1”;
this.tabPage1.Size = new System.Drawing.Size(304, 182);
this.tabPage1.TabIndex = 0;
this.tabPage1.Text = “User”;
//
// tabPage2
//
this.tabPage2.Location = new System.Drawing.Point(4, 22);
this.tabPage2.Name = “tabPage2”;
this.tabPage2.Size = new System.Drawing.Size(304, 182);
this.tabPage2.TabIndex = 1;
this.tabPage2.Text = “Role”;
//
// tabPage3
//
this.tabPage3.Location = new System.Drawing.Point(4, 22);
this.tabPage3.Name = “tabPage3”;
this.tabPage3.Size = new System.Drawing.Size(304, 182);
this.tabPage3.TabIndex = 2;
this.tabPage3.Text = “Screen”;
//
// tabPage4
//
this.tabPage4.Location = new System.Drawing.Point(4, 22);
this.tabPage4.Name = “tabPage4”;
this.tabPage4.Size = new System.Drawing.Size(304, 182);
this.tabPage4.TabIndex = 3;
this.tabPage4.Text = “Module”;
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(360, 261);
this.Controls.Add(this.tabControl1);
this.Name = “Form1”;
this.Text = “Selected Tab Page”;
this.tabControl1.ResumeLayout(false);
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

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, SystemColors.Control, System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal);
bshFore = Brushes.Black;
//bshBack = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds, Color.LightSkyBlue , Color.LightGreen, System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal);
bshBack = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds, Color.FromArgb(81, 3, 133), Color.FromArgb(81, 3, 133), System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal);
bshFore = Brushes.White;//Blue;

}
else
{
fntTab = e.Font;
bshBack = new SolidBrush(SystemColors.Control);
bshFore = new SolidBrush(Color.Black);

bshBack = new SolidBrush(SystemColors.Control);
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);

}

}
}