navBarControl xtratabbedmanager

1. form  设置为 private      始终 只打开一个

2.NavBarControl尝试设置Item的属性LargeImageIndex的值，则发现没有任何变化，这是为什么呢？原来在设置这个属性之前还需要设置此Item所在Group的属性GroupStyle的值为LargeImageText。

3.  xtraTabbedMdiManager1.SelectedPage = xtraTabbedMdiManager1.Pages[f1]; // 选中page
 
            xtraTabbedMdiManager1.Pages[f1].Image = navBarItem1.SmallImage;//  page设置图片

 this.xtraTabbedMdiManager1.ClosePageButtonShowMode = DevExpress.XtraTab.ClosePageButtonShowMode.InAllTabPagesAndTabControlHeader; 
         
4. 双击保存




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

namespace WindowsFormsApplication15
{



    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();
            xtraTabbedMdiManager1.MdiParent = this;
        }

        private void navBarControl1_Click(object sender, EventArgs e)
        {

            Form2 f1 = Form2.CreateFrom();
            f1.MdiParent = this;
            f1.Show();



            xtraTabbedMdiManager1.SelectedPage = xtraTabbedMdiManager1.Pages[f1];

            xtraTabbedMdiManager1.Pages[f1].Image = navBarItem1.SmallImage;
        }

        private void navBarItem2_LinkClicked(object sender, DevExpress.XtraNavBar.NavBarLinkEventArgs e)
        {
            Form3 f1 = Form3.CreateForm();
            f1.MdiParent = this;
            f1.Show();



            xtraTabbedMdiManager1.SelectedPage = xtraTabbedMdiManager1.Pages[f1];

            xtraTabbedMdiManager1.Pages[f1].Image = navBarItem1.SmallImage;
        }
        private DateTime m_LastClick = System.DateTime.Now;
        private XtraMdiTabPage m_lastPage = null;
        private void xtraTabbedMdiManager1_MouseDown(object sender, MouseEventArgs e)
        {
            XtraMdiTabPage curPage = (sender as XtraTabbedMdiManager).SelectedPage;

            if (e.Button == MouseButtons.Left)
            {

                DateTime dt = DateTime.Now;
                TimeSpan span = dt.Subtract(m_LastClick);
                if (span.TotalMilliseconds < 300)  //如果两次点击的时间间隔小于300毫秒，则认为是双击
                {


                    if (this.MdiChildren.Length > 1)
                    {

                        // 限制只有在同一个页签上双击才能关闭.(规避两个页签切换时点太快导致意外关闭页签)
                        if (curPage.Equals(m_lastPage))
                        {
                            //if (this.ActiveMdiChild != m_MapForm)
                            //{
                            //this.ActiveMdiChild.Close();
                            curPage.MdiChild.Close();

                            //}

                        }
                    }
                    m_LastClick = dt.AddMinutes(-1);
                }
                else
                {
                    m_LastClick = dt;
                    m_lastPage = curPage;
                }
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
    }
}
/*************/  form 


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

namespace WindowsFormsApplication15
{
    public partial class Form2 : Form
    {
        private Form2()
        {
            InitializeComponent();
        }
        private static Form2 instance;
        public static Form2 CreateFrom()
        {
            //判断是否存在该窗体,或时候该字窗体是否被释放过,如果不存在该窗体,则 new 一个字窗体  
            if (instance == null || instance.IsDisposed)
            {
                instance = new Form2();
            }
            return instance;
        }
        private void Form2_Load(object sender, EventArgs e)
        {

        }
    }
}