C#教程之基于C#实现的仿windows左侧伸缩菜单效果

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C#教程之基于C#实现的仿windows左侧伸缩菜单效果
本文所述为基于C#实现的折叠菜单，风格仿照Windows打开我的电脑后左侧的伸缩菜单效果，并且同样是蓝色的效果，看着和windows的效果一样漂亮，可以实现折叠、展开等功能。这在学习C#界面编程的时候能用上，其主要实现代码如下：
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using System; 

using System.Collections.Generic; 

using System.ComponentModel; 

using System.Data; 

using System.Drawing; 

using System.Linq; 

using System.Text; 

using System.Windows.Forms; 

using System.Runtime.InteropServices; 

namespace LikesXP 

{ 

  public partial class Frm_Main : Form 

  { 

    public Frm_Main() 

    { 

      InitializeComponent(); 

    } 

    private static Panel Var_Panel = new Panel();//创建静态字段 

    private static PictureBox Var_Pict = //创建静态字段 

      new PictureBox(); 

    private static int Var_i = 0;//创建静态字段 

    private Font Var_Font = new Font("宋体", 9); //创建字体字段 

    private void pictureBox_1_Click(object sender, EventArgs e) 

    { 

      Var_i = Convert.ToInt16((//得到控件中的数据 

        (PictureBox)sender).Tag.ToString()); 

      switch (Var_i) 

      { 

        case 1: 

          { 

            Var_Panel = panel_Gut_1;//得到面板对象引用 

            //Var_Pict = pictureBox_1;//得到PictureBox对象引用 

            break; 

          } 

        case 2: 

          { 

            Var_Panel = panel_Gut_2;//得到面板对象引用 

            Var_Pict = pictureBox_2;//得到PictureBox对象引用 

            break; 

          } 

        case 3: 

          { 

            Var_Panel = panel_Gut_3;//得到面板对象引用 

            Var_Pict = pictureBox_3;//得到PictureBox对象引用 

            break; 

          } 

      } 

      if (Convert.ToInt16(Var_Panel.Tag.ToString()) == 0 || Convert.ToInt16(Var_Panel.Tag.ToString()) == 2) 

      { 

        Var_Panel.Tag = 1;//设置为隐藏标识 

        Var_Pict.Image = Properties.Resources.朝下按钮;//设置图像属性 

        Var_Panel.Visible = false;//隐藏面板 

      } 

      else

      { 

        if (Convert.ToInt16(Var_Panel.Tag.ToString()) == 1) 

        { 

          Var_Panel.Tag = 2;//设置为显示标识 

          Var_Pict.Image = Properties.Resources.朝上按钮;//设置图像属性 

          Var_Panel.Visible = true;//显示面板 

        } 

      } 

    } 

    private void Form1_Load(object sender, EventArgs e) 

    { 

      //pictureBox_1.Image = Properties.Resources.朝上按钮;//设置图像信息 

      pictureBox_2.Image = Properties.Resources.朝上按钮;//设置图像信息 

      pictureBox_3.Image = Properties.Resources.朝上按钮;//设置图像信息 

      Var_Font = label_1.Font;//得到字体对象 

    } 

    private void label_1_MouseEnter(object sender, EventArgs e) 

    { 

      ((Label)sender).ForeColor = Color.Gray;//设置控件文字字颜色 

      ((Label)sender).Font = //设置控件字体 

        new Font(Var_Font, Var_Font.Style | FontStyle.Underline); 

    } 

    private void label_1_MouseLeave(object sender, EventArgs e) 

    { 

      ((Label)sender).ForeColor = Color.Black;//设置控件文字颜色 

      ((Label)sender).Font = //设置控件字体 

        new Font(Var_Font, Var_Font.Style); 

    } 

    private void pictureBox1_Click(object sender, EventArgs e) 

    { 

      if (Convert.ToInt16(panel1.Tag.ToString()) == 1) 

      { 

        timer1.Start(); 

        Convert.ToDateTime("").ToShortDateString(); 

        // pictureBox1.Image = Properties.Resources.朝下按钮;//设置图像属性 

        //panel1.Visible = false;//隐藏面板 

      } 

      else

      { 

        if (Convert.ToInt16(panel1.Tag.ToString()) == 0) 

        { 

          timer1.Start(); 

          //panel1.Tag = 1;//设置为显示标识 

          //pictureBox1.Image = Properties.Resources.朝上按钮;//设置图像属性 

          //panel1.Visible = true;//显示面板 

        } 

      } 

    } 

    private void timer1_Tick(object sender, EventArgs e) 

    { 

      long longWidth = panel1.Width; 

      //如果panel目前是隐藏的 

      if (Convert.ToInt16(panel1.Tag.ToString()) == 0) 

      { 

        if (longWidth == 200) 

        { 

          timer1.Enabled = false; 

          panel1.Tag = 1;//设置为显示标识 

        } 

        else

        { 

          panel1.Width += 10; 

        } 

      } 

      //如果panel目前是显示的 

      if (Convert.ToInt16(panel1.Tag.ToString()) == 1) 

      { 

        if (longWidth == 0) 

        { 

          timer1.Enabled = false; 

          panel1.Tag = 0;//设置为隐藏标识 

        } 

        else

        { 

          panel1.Width -= 10; 

        } 

      } 

    } 

  } 

}
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