private void FrmMianZjm_Load(object sender, EventArgs e)
        {
            //设置主页按钮颜色
            this.btnHome.BackColor = Color.FromArgb(34, 187, 255);
            this.lkUserName.Text   = UserName;
            this.labTime.Text      = DateTime.Now.ToString("MM月dd日 hh:mm:ss");
            //加载主页
            FrmHome home = new FrmHome();

            home.TopLevel        = false;
            home.Dock            = DockStyle.Fill;//把子窗体设置为控件
            home.FormBorderStyle = FormBorderStyle.None;
            this.panHome.Controls.Clear();
            this.panHome.Controls.Add(home);
            home.UserID = UserID;
            home.Show();
        }
        private void btnHome_Click(object sender, EventArgs e)
        {
            if (this.btnHome.BackColor == Color.Transparent)//判断按钮颜色
            {
                this.btnHome.BackColor           = Color.FromArgb(24, 187, 255);
                this.BtnClassification.BackColor = Color.Transparent;
                this.btnRanking.BackColor        = Color.Transparent;
                this.btnOrder.BackColor          = Color.Transparent;
            }
            FrmHome home = new FrmHome();

            home.TopLevel        = false;
            home.Dock            = DockStyle.Fill;//把子窗体设置为控件
            home.FormBorderStyle = FormBorderStyle.None;
            this.panHome.Controls.Clear();
            this.panHome.Controls.Add(home);
            home.UserID = UserID;
            home.Show();
        }