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 = ; 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 > )
             {
                 MdiChildren[].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 = ; 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 ==  || 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 = ; i < this.MdiChildren.Length; i++)
             {
                 if (this.MdiChildren[i].Name == "Form3")
                 {
                     b = false;
                 }
             }
             if (this.MdiChildren.Length == ||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。