Devexpress xtraTabControl1实现多标签页选项卡，关闭选项卡，刷新重新加载

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//选项卡     Dictionary<string, XtraTabPage> dictXtraTabPage = new Dictionary<string, XtraTabPage>();     Dictionary<string, Form> dictXtraForm = new Dictionary<string, Form>();       public void ShowMDIForm(string cText, Form frm)     {         //判断是否已创建过         if (dictXtraTabPage.ContainsKey(cText)）         {             xtraTabControl1.SelectedTabPage = dictXtraTabPage[cText];             return;         }       /*使用以下这段注释，需要把上面的if语句注释掉。     //判断是否已创建过，排除已创建的选项卡，重新加载窗体和传参。         if (dictXtraTabPage.ContainsKey(cText)&& frm.Text != "选项卡名称")         {             xtraTabControl1.SelectedTabPage = dictXtraTabPage[cText];             return;         }           //已经创建过选项卡，先移除它，重新加载，达到刷新窗体数据的目的)           if (dictXtraTabPage.ContainsKey(cText) && frm.Text=="选项卡名称")         {             xtraTabControl1.TabPages.Remove(dictXtraTabPage["选项卡名称"]);             dictXtraTabPage.Remove(cText);             dictXtraForm.Remove(cText);         } */           frm.Visible = true;         frm.Dock = DockStyle.Fill;         frm.FormBorderStyle = FormBorderStyle.None;         frm.WindowState = FormWindowState.Maximized;         frm.TopLevel = false;//注意这里，否则加载不出来           XtraTabPage xpage = new XtraTabPage();         xpage.Controls.Add(frm);//添加要增加的控件           xpage.Text = cText;//添加名称         xpage.ShowCloseButton = DevExpress.Utils.DefaultBoolean.True;         xtraTabControl1.TabPages.Add(xpage);         xtraTabControl1.SelectedTabPage = xpage;//显示该页           dictXtraTabPage.Add(cText, xpage);//加入XtraTabPage字典         dictXtraForm.Add(cText, frm);//加入XtraForm字典       }       //关闭选项卡     private void xtraTabControl1_CloseButtonClick(object sender, EventArgs e)     {         ClosePageButtonEventArgs a = (ClosePageButtonEventArgs)e;         string cText = a.Page.Text;           if (dictXtraForm.ContainsKey(cText))         {             Form form = dictXtraForm[cText] as Form;             form.Close();             form.Dispose();             dictXtraForm.Remove(cText);             xtraTabControl1.SelectedTabPageIndex = xtraTabControl1.SelectedTabPageIndex >= 1 ? xtraTabControl1.SelectedTabPageIndex - 1 : 0;         }           if (dictXtraTabPage.ContainsKey(cText))         {             xtraTabControl1.TabPages.Remove((XtraTabPage)a.Page);             dictXtraTabPage.Remove(cText);         }     }     //菜单栏点击窗体   private void ToolStripMenuItem1_Click(object sender, EventArgs e)     {         Form form = new Form();         ShowMDIForm("选项卡名称",from);     }