DevExpress 用户控件 分页（中）

说明：

1）具体调用请关注 看DevExpress 用户控件 分页（下）

datanavi_ButtonClick 是DataNavigator的ButtonClikc事件

视图设计器：

分页用户控件后台代码如下：

 

using System;  
using System.Collections.Generic;  
using System.ComponentModel;  
using System.Drawing;  
using System.Data;  
using System.Linq;  
using System.Text;  
using System.Windows.Forms;  
using DevExpress.XtraEditors;  
  
namespace CYSoft.TS.UI.StudentInfo  
{  
    public partial class PageCtrl : DevExpress.XtraEditors.XtraUserControl  
    {  
  
        /// <summary>  
        /// 自定义事件 当前页改变事件  
        /// </summary>  
        public event EventHandler CurrentPageChange;  
 
        #region 定义分页 字段和属性  
        private int m_recordCount = 0;  
        /// <summary>  
        /// 数据行总数  
        /// </summary>  
        public int recordCount  
        {  
            get { return m_recordCount; }  
            set  
            {  
                SetFormCtrlEnable();  
                this.m_recordCount = value;  
            }  
        }  
  
        private int m_pageSize = 20;  
        /// <summary>  
        /// 每页显示的数据行数  
        /// </summary>  
        public int pageSize  
        {  
            get { return m_pageSize; }  
            set { this.m_pageSize = value; }  
        }  
  
        private int m_pageIndex = 1;  
        /// <summary>  
        /// 当前页  
        /// </summary>  
        public int pageIndex  
        {  
            get { return m_pageIndex; }  
            set { this.m_pageIndex = value; }  
        }  
  
        private int m_pageCount = 0;  
        /// <summary>  
        /// 总页数  
        /// </summary>  
        public int pageCount  
        {  
            get  
            {  
                if (m_pageSize != 0)  
                {  
                    m_pageCount = GetPageCount();  
                }  
                return m_pageCount;  
            }  
  
        }  
  
        /// <summary>  
        /// 获取总页数  
        /// </summary>  
        /// <returns></returns>  
        private int GetPageCount()  
        {  
            if (pageSize == 0)  
            {  
                return 0;  
            }  
            int num = 1;  
            if (recordCount % pageSize == 0)  
            {  
                num = recordCount / pageSize;  
            }  
            else  
            {  
                num = recordCount / pageSize + 1;  
            }  
            return num;  
        }  
        #endregion  
  
        public PageCtrl()  
        {  
            InitializeComponent();  
        }  
  
        /// <summary>  
        /// 设置DataNavigator按钮全部可用  
        /// </summary>  
        private void SetFormCtrlEnable()  
        {  
            this.datanavi.Buttons.CustomButtons[0].Enabled = true;  
            this.datanavi.Buttons.CustomButtons[1].Enabled = true;  
            this.datanavi.Buttons.CustomButtons[2].Enabled = true;  
            this.datanavi.Buttons.CustomButtons[3].Enabled = true;  
        }  
  
        //DataNavigator 点击        
        private void datanavi_ButtonClick(object sender, NavigatorButtonClickEventArgs e)  
        {  
            ShowEvent("ButtonClick", e.Button);  
        }  
 
        #region 第一页、上一页、下一页、最后一页  
        /// <summary>  
        /// 第一页、上一页、下一页、最后一页 点击事件  
        /// </summary>  
        /// <param name="eventString"></param>  
        /// <param name="nbb"></param>  
        void ShowEvent(string eventString, NavigatorButtonBase nbb)  
        {  
            switch (nbb.Tag.ToString())  
            {  
                case "First":  
                    First();  
                    break;  
                case "PrePage":  
                    PrePage();  
                    break;  
                case "NextPage":  
                    NextPage();  
                    break;  
                case "Last":  
                    Last();  
                    break;  
                default:  
                    break;  
            }  
            DrawControl(true);  
        }  
  
        private void First()  
        {  
            m_pageIndex = 1;  
        }  
        private void PrePage()  
        {  
            m_pageIndex = Math.Max(1, m_pageIndex - 1);  
        }  
        private void NextPage()  
        {  
            m_pageIndex = Math.Min(pageCount, m_pageIndex + 1);  
        }  
        private void Last()  
        {  
            m_pageIndex = pageCount;  
        }  
        #endregion  
  
        /// <summary>  
        /// 设置DataNavigator按钮是否可用  
        /// </summary>  
        /// <param name="callEvent">是否当前页</param>  
        private void DrawControl(bool callEvent)  
        {  
            if (callEvent && CurrentPageChange != null)  
            {  
                //当前页事件  
                CurrentPageChange(this, null);  
            }  
            //设置按钮全部可用  
            this.SetFormCtrlEnable();  
            //只有一页  
            if (recordCount <= 1)  
            {  
                this.datanavi.Buttons.CustomButtons[0].Enabled = false;  
                this.datanavi.Buttons.CustomButtons[1].Enabled = false;  
                this.datanavi.Buttons.CustomButtons[2].Enabled = false;  
                this.datanavi.Buttons.CustomButtons[3].Enabled = false;  
            }//第一页  
            else if (pageIndex <= 1)  
            {  
                this.datanavi.Buttons.CustomButtons[0].Enabled = false;  
                this.datanavi.Buttons.CustomButtons[1].Enabled = false;  
            }//最后一页  
            else if (pageIndex >= pageCount)  
            {  
                this.datanavi.Buttons.CustomButtons[2].Enabled = false;  
                this.datanavi.Buttons.CustomButtons[3].Enabled = false;  
            }  
  
        }  
  
        /// <summary>  
        /// 加载LableControl  
        /// </summary>  
        private void ShowLableInfo()  
        {  
            if (!this.Created)  
            {  
                return;  
            }  
            this.BeginInvoke((MethodInvoker)delegate  
            {  
                try  
                {  
                    if (!DesignMode)  
                    {  
                        this.labelControl1.Text = "总行数：" + recordCount + "      当前页：" + pageIndex + "/" + pageCount + "    ";  
                    }  
                }  
                catch { }  
            });  
        }  
  
        /// <summary>  
        /// 分页控件加载  
        /// </summary>  
        /// <param name="count">数据总行数</param>  
        private void DrawControl(int count)  
        {  
            m_recordCount = count;  
            //设置DataNavigator  
            DrawControl(false);  
            //设置LabControl  
            ShowLableInfo();  
        }  
  
        /// <summary>  
        /// 设置分页数据控件  
        /// </summary>  
        /// <param name="currentPageIndex">当前页</param>  
        /// <param name="pageSize2">每页显示行数</param>  
        /// <param name="recordTotal">总行数</param>  
        public void SetPageCtrl(int currentPageIndex, int pageSize2, int recordTotal)  
        {  
            pageIndex = currentPageIndex;  
            recordCount = recordTotal;  
            pageSize = pageSize2;  
  
            DrawControl(recordTotal);  
  
        }  
  
    }  
}