DevExpress构建多文档界面

在DevExpress中，多文档界面的构建需要用到XtraTabControl控件，如下图所示：

首先设置选项卡可关闭，如下图所示，

如果你希望首页选项卡不关闭，则进行如下设置：

多文档的实现需要将Form嵌入XtraTabControl，我这里做了一个加载word文件的子窗体，如下图所示：

代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;
using DevExpress.XtraEditors;

namespace DXApplication1
{
    public partial class FrmWord : DevExpress.XtraEditors.XtraForm
    {
        /// 

        /// 文档路径
        /// 
        public string DocumentFilePath { get; set; }

        /// 

        /// 构造函数
        /// 
        public FrmWord()
        {
            InitializeComponent();
        }

        /// 

        /// OnLoad事件
        /// 
        /// 
        /// 
        private void FrmWord_Load(object sender, EventArgs e)
        {
            richEditControl1.LoadDocument(DocumentFilePath);
        }
    }
}

动态添加选项卡也很简单，若当前不存在该选项卡则添加，若已经存在则选择该选项卡，代码如下：

using DevExpress.XtraBars;
using DevExpress.XtraTab;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DXApplication1
{
    public partial class FrmMain : DevExpress.XtraBars.Ribbon.RibbonForm
    {
        public FrmMain()
        {
            InitializeComponent();
        }

        private void barButtonItem1_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
        {
            string text = e.Item.Caption;
            foreach (XtraTabPage tabPage in xtraTabControl1.TabPages)
            {
                if (tabPage.Text == text)
                {
                    xtraTabControl1.SelectedTabPage = tabPage;
                    return;
                }
            }
            
            // 实例化窗体
            FrmWord frm = new FrmWord();
            frm.DocumentFilePath = Application.StartupPath + "\word\一级台风预案.docx";
            frm.Visible = true;
            frm.Dock = DockStyle.Fill;
            frm.FormBorderStyle = FormBorderStyle.None;
            frm.WindowState = FormWindowState.Maximized;
            frm.TopLevel = false;

            // 添加tab
            XtraTabPage page = new XtraTabPage();
            page.Controls.Add(frm);
            page.Text = text;
            page.ShowCloseButton = DevExpress.Utils.DefaultBoolean.True;
            xtraTabControl1.TabPages.Add(page);
            xtraTabControl1.SelectedTabPage = page;
        }

        private void barButtonItem2_ItemClick(object sender, ItemClickEventArgs e)
        {
            string text = e.Item.Caption;
            foreach (XtraTabPage tabPage in xtraTabControl1.TabPages)
            {
                if (tabPage.Text == text)
                {
                    xtraTabControl1.SelectedTabPage = tabPage;
                    return;
                }
            }

            // 实例化窗体
            FrmWord frm = new FrmWord();
            frm.DocumentFilePath = Application.StartupPath + "\word\一级暴雨预案.docx";
            frm.Visible = true;
            frm.Dock = DockStyle.Fill;
            frm.FormBorderStyle = FormBorderStyle.None;
            frm.WindowState = FormWindowState.Maximized;
            frm.TopLevel = false;

            // 添加tab
            XtraTabPage page = new XtraTabPage();
            page.Controls.Add(frm);
            page.Text = text;
            page.ShowCloseButton = DevExpress.Utils.DefaultBoolean.True;
            xtraTabControl1.TabPages.Add(page);
            xtraTabControl1.SelectedTabPage = page;
        }
    }
}