20141112 WinForm子窗口标签页

（一）标签页

先看看效果：

代码：

    public partial class 标签页 : Form
    {
        string s = "";
        public 标签页()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 判断选项卡中是否有本选项卡
        /// </summary>
        /// <param name="s">选项卡名</param>
        /// <returns>布尔型</returns>

        private bool HasTablePages(string s)
        {
            for (int i = 0; i < tabControl1.TabPages.Count; i++)
            {
                if (tabControl1.TabPages[i].Text == s)
                {
                    tabControl1.SelectedIndex = i;//如果选项卡中有本选项卡，则把本选项卡设为焦点
                    return false;
                }
            }
            return true;
        }
        /// <summary>
        /// 点击菜单时，创建本选项卡，同时将自定义的选项卡控件添加进去
        /// </summary>
        /// <param name="s">选项卡名</param>
        /// <param name="uc">自定义的控件</param>
        private void MenuAdd(string s,UserControl uc)
        {
            if (HasTablePages(s))
            {
                TabPage page = new TabPage();
                page.Text = s;

                page.Controls.Clear();
                page.Controls.Add(uc);
                uc.Dock = DockStyle.Fill;

                tabControl1.TabPages.Add(page);
                tabControl1.SelectedTab = page;
            }
        }
        private void 会员管理ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            s = "会员管理";
            UC_HuiYuan uc = new UC_HuiYuan();
            MenuAdd(s,uc);
        }

        private void 数据管理ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            s = "数据管理";
            UC_ShuJu sj = new UC_ShuJu();
            MenuAdd(s,sj);
        }

        private void 客房管理ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            s = "客房管理";
            UC_KeFang kf = new UC_KeFang();
            MenuAdd(s,kf);
        }
        /// <summary>
        /// 双击选项卡名时，关闭本选项卡
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void tabControl1_DoubleClick(object sender, EventArgs e)
        {
            tabControl1.TabPages.RemoveAt(tabControl1.SelectedIndex);
        }
    }

（二）子窗体

 先看看效果：

代码：

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 关闭所有窗口
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void 关闭所有窗口ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            while (this.MdiChildren.Length > 0)
            {
                MdiChildren[0].Close();
            }
        }
        /// <summary>
        /// 新建Form2
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            bool b = true;//用来判断子窗口中是否存在Form2
            for (int i = 0; i < this.MdiChildren.Length; i++)
            {
                if (this.MdiChildren[i].Name == "Form2")
                {
                    b = false;
                }
            }
            //没有子窗口 或者 子窗口中没有Form2 时
            if (this.MdiChildren.Length == 0 || b)
            {
                Form2 fm = new Form2();
                fm.MdiParent = this;
                fm.Show();
            }
        }
        /// <summary>
        /// 新建Form3
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void toolStripMenuItem2_Click(object sender, EventArgs e)
        {
            bool b = true;
            for (int i = 0; i < this.MdiChildren.Length; i++)
            {
                if (this.MdiChildren[i].Name == "Form3")
                {
                    b = false;
                }
            }
            if (this.MdiChildren.Length == 0||b)
            {
                Form3 fm = new Form3();
                fm.MdiParent = this;
                fm.Show();
            }
        }
    }

PS：

1.父窗体：IsMdiContainer=true
2.子窗体：建一个窗体，设计好。在父窗体“新建子窗体”界面中，把子窗体new出来。把新new出来的子窗体的MdiParent属性设置为父窗体对象。