C#左侧导航菜单

【实例截图】

【核心代码】

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

namespace 南洋中学高一招生报名系统
{
    public partial class Form1 : Form
    {
        public System.Windows.Forms.Panel ActivePanel = new Panel();
        public Form1()
        {
            InitializeComponent();
            ActivePanel = panel3 ;
        }

        private void panel3_Paint(object sender, PaintEventArgs e)
        {

        }

        private void button24_Click(object sender, EventArgs e)
        {

        }


        private void PanelReSize(object sender, EventArgs e)
        {
            for (int i = 0; i < ActivePanel.Controls.Count; i  )
            {
                ActivePanel.Controls[i].Left = (ActivePanel.Width - ActivePanel.Controls[i].Width) / 2;
            }

        }

        
        private void button1_Click(object sender, EventArgs e)
        {

            if(ActivePanel.Name  == panel3.Name)
                return;   
            ActivePanel = panel3;
            
            button1.SendToBack();
            button1.Dock = DockStyle.Top;
            
            button2.SendToBack();
            button2.Dock = DockStyle.Bottom;
            button3.SendToBack();
            button3.Dock = DockStyle.Bottom;
            button4.SendToBack();
            button4.Dock = DockStyle.Bottom;
           
            panel2.SendToBack();
            panel4.SendToBack();
            panel5.SendToBack();
            panel3.BringToFront();
            panel3.Dock = DockStyle.Fill;

            PanelReSize(this,e);




        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (ActivePanel.Name == panel2.Name)
                return;            
            ActivePanel = panel2;
           
            button2.Dock = DockStyle.Top;
            button1.SendToBack();
            button1.Dock = DockStyle.Top;
           
            button3.SendToBack();
            button3.Dock = DockStyle.Bottom;
            button4.SendToBack();
            button4.Dock = DockStyle.Bottom;

            panel3.SendToBack();
            panel4.SendToBack();
            panel5.SendToBack();
            panel2.BringToFront();
            panel2.Dock = DockStyle.Fill;

            PanelReSize(this, e);
           


        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (ActivePanel.Name == panel4.Name)
                return;            
            ActivePanel = panel4;
            
            button3.Dock = DockStyle.Top;
            button2.SendToBack();
            button2.Dock = DockStyle.Top;
            button1.SendToBack();
            button1.Dock = DockStyle.Top;            
            
            button4.Dock = DockStyle.Bottom;

            panel2.SendToBack();
            panel3.SendToBack();
            panel5.SendToBack();
            panel4.BringToFront();
            panel4.Dock = DockStyle.Fill;

            PanelReSize(this, e);


        }

        private void button4_Click(object sender, EventArgs e)
        {
            if (ActivePanel.Name == panel5.Name)
                return;            
            ActivePanel = panel5;
           
            button4.Dock = DockStyle.Top;
            button3.SendToBack();
            button3.Dock = DockStyle.Top;
            button2.SendToBack();
            button2.Dock = DockStyle.Top;
            button1.SendToBack();
            button1.Dock = DockStyle.Top;

            panel2.SendToBack();
            panel3.SendToBack();
            panel4.SendToBack();
            panel5.BringToFront();
            panel5.Dock = DockStyle.Fill;

            PanelReSize(this, e);


        }

        private void panel5_Paint(object sender, PaintEventArgs e)
        {

        }

        
        


    }
}