winform切换页面

布局效果如下图：

•  首先在主窗体后台代码声明需要打开的窗体变量，代码如下：

1     public partial class Form1 : Form
2     {
3         Button btnShadow;//作为中间寄存button，用于显示
4         Home home;
5         Setting setting;
6         Record record;
7         Query query;
8         Statistics statistics;

• 主窗台构造函数内对实例化需要打开的窗体，并进行熟属性设置，代码如下：

 1         public Form1()
 2         {
 3             InitializeComponent();
 4             //Region = System.Drawing.Region.FromHrgn(CreateRoundRectRgn(0, 0, Width, Height, 25, 25));
 5 
 6             //初始化各窗口
 7             home = new Home() { TopLevel = false, TopMost = true, Dock = DockStyle.Fill };
 8             setting = new Setting() { TopLevel = false, TopMost = true, Dock = DockStyle.Fill };
 9             record = new Record() { TopLevel = false, TopMost = true, Dock = DockStyle.Fill };
10             query = new Query() { TopLevel = false, TopMost = true, Dock = DockStyle.Fill };
11             statistics = new Statistics() { TopLevel = false, TopMost = true, Dock = DockStyle.Fill };
12 
13             //默认进入为主页和主按钮
14             LoadWindow(home);
15             SelectBarAndBtnShadow(this.button1);
16         }

• 创建加载窗体公共方法LoadWindow，具体代码如下：

1         private void LoadWindow(Form form)
2         {
3 
4             this.panel3.Controls.Clear();
5             form.FormBorderStyle = FormBorderStyle.None;
6             this.panel3.Controls.Add(form);
7             form.Show();
8         }

• Statistics按钮切换页面的后台代码如下：

1         private void button2_Click(object sender, EventArgs e)
2         {
3             this.lblTitle.Text = "Statistics";
4             SelectBarAndBtnShadow(sender);
5             LoadWindow(statistics);
6 
7         }

• 选中侧边栏菜单是，显示选中状态的效果的代码如下：

 1         private void SelectBarAndBtnShadow(object btn)
 2         {
 3             if (btnShadow != null)
 4             {
 5                 btnShadow.BackColor = Color.FromArgb(24, 30, 54);
 6             }
 7 
 8             Button button = (Button)btn;
 9             this.leftPanel.Height = button.Height;
10             this.leftPanel.Top = button.Top;
11             this.leftPanel.Left = button.Left;
12 
13 
14             btnShadow = button;
15             btnShadow.BackColor = Color.FromArgb(46, 51, 73);
16 
17         }