C# 编写菜单的使用问题讲解

1、源代码
private void toolStripMenuItem1_Click(object sender, EventArgs e)
{   
        //点击展开(关闭)其他项钮的事件
        switch  (i)
        {
                case 1:
                this.设置密码ToolStripMenuItem.Visible = false;
                this.添加用户ToolStripMenuItem.Visible = false;
                this.忘记密码ToolStripMenuItem.Visible = false;
                this.修改密码ToolStripMenuItem.Visible = false;
                this.员工录入ToolStripMenuItem.Visible = false;
                i = 2;
                this.操作ToolStripMenuItem.ShowDropDown();
                break;
                
                case 2:
                this.设置密码ToolStripMenuItem.Visible = true;
                this.添加用户ToolStripMenuItem.Visible = true;
                this.忘记密码ToolStripMenuItem.Visible = true;
                this.修改密码ToolStripMenuItem.Visible = true;
                this.员工录入ToolStripMenuItem.Visible = true;
                i = 1;
                this.操作ToolStripMenuItem.ShowDropDown();
                break;
        }
}

2、如果只是初始窗体时，控制菜单的是否可见，只要设置菜单项的Visible属性即可、

3、此处特殊点是this.操作ToolStripMenuItem.ShowDropDown();
无此句时，点击后系统自动关闭菜单，认为是执行按钮事件后结束，菜单刷新了看不见，需要点击菜单才能观察；加入此句后，菜单更新并且不关闭，用户可以直接看到菜单的变化。

补充：软件开发 , C# ,