ProductionSystem/ProductionSystem_UserControl/CompositeControls/GridPage.cs

using DevExpress.XtraEditors;
using System.Windows.Forms;
using System;

namespace ProductionSystem_UserControl.CompositeControls
{
    public partial class GridPage : XtraUserControl
    {
        public int DataCount = 0;
        public int PageSize = 20;
        public int PageIndex = 1;
        public int[] PageSizeList = new int[] { 10, 20, 30, 50 };

        public delegate void PagerEvents();
        public event PagerEvents OnPagerEvents;

        public GridPage()
        {
            InitializeComponent();

            Load += (s, e) =>
            {
                BindConfig();
            };
        }

        /// <summary>
        /// 绑定配置
        /// </summary>
        private void BindConfig()
        {
            cmbPageSize.Properties.Items.AddRange(PageSizeList);
            cmbPageSize.EditValue = PageSize.ToString();
            cmbPageSize.RefreshEditValue();
            cmbPageSize.SelectedIndexChanged += (s, e) =>
            {
                try
                {
                    var combo = s as ComboBoxEdit;

                    int selectPageSize = Convert.ToInt32(combo.SelectedItem.ToString());

                    if (OnPagerEvents != null)
                    {
                        PageSize = selectPageSize;
                        IsEnable();
                        OnPagerEvents();
                    }
                }
                catch (Exception)
                {

                }
            };

            btnFirst.Click += (s, e) =>
            {
                if (OnPagerEvents != null)
                {
                    PageIndex = 1;
                    IsEnable();
                    OnPagerEvents();
                }
            };
            btnPre.Click += (s, e) =>
            {
                if (OnPagerEvents != null)
                {
                    if (PageIndex > 1)
                        PageIndex -= 1;
                    IsEnable();
                    OnPagerEvents();
                }
            };
            btnNext.Click += (s, e) =>
            {
                if (OnPagerEvents != null)
                {
                    if (PageIndex < GetTotalCount())
                        PageIndex += 1;
                    IsEnable();
                    OnPagerEvents();
                }
            };
            btnLast.Click += (s, e) =>
            {
                if (OnPagerEvents != null)
                {
                    PageIndex = GetTotalCount();
                    IsEnable();
                    OnPagerEvents();
                }
            };
            txtCurentPage.KeyUp += (s, e) =>
            {
                try
                {
                    var curIndex = Convert.ToInt32(txtCurentPage.Text);
                    if (curIndex >= 1 && curIndex <= GetTotalCount())
                    {
                        PageIndex = curIndex;
                        if (OnPagerEvents != null)
                        {
                            IsEnable();
                            OnPagerEvents();
                        }
                    }
                    else
                    {
                        txtCurentPage.Text = PageIndex.ToString();
                    }
                }
                catch (Exception)
                {

                }
            };
        }

        /// <summary>
        /// 设置分页控件
        /// </summary>
        /// <param name="pageIndex"></param>
        /// <param name="pageSize"></param>
        /// <param name="dataCount"></param>
        public void RefreshPager(int pageIndex, int pageSize, int dataCount)
        {
            try
            {
                PageIndex = pageIndex;
                PageSize = pageSize;
                DataCount = dataCount;
                var pageCount = GetTotalCount();

                txtCurentPage.Text = PageIndex.ToString();
                lblDesc.Text = $"共{DataCount}条 {PageIndex}/{pageCount} 页";

                if (PageIndex == 0)
                {
                    if (pageCount > 0)
                    {
                        PageIndex = 1;
                        OnPagerEvents();
                    }
                }
                if (PageIndex > pageCount)
                {
                    PageIndex = pageCount;
                    //OnPagerEvents();
                }
                IsEnable();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

        }

        /// <summary>
        /// 设置状态
        /// </summary>
        public void IsEnable()
        {
            try
            {
                var pageCount = GetTotalCount();
                if (DataCount == 0)
                {
                    btnFirst.Enabled = false;
                    btnPre.Enabled = false;
                    btnNext.Enabled = false;
                    btnLast.Enabled = false;
                }
                if (PageIndex == 1 || PageIndex == 0)
                {
                    btnFirst.Enabled = false;
                    btnPre.Enabled = false;
                }
                else
                {
                    btnFirst.Enabled = true;
                    btnPre.Enabled = true;
                }

                if (PageIndex == pageCount)
                {
                    btnNext.Enabled = false;
                    btnLast.Enabled = false;
                }
                else
                {
                    btnNext.Enabled = true;
                    btnLast.Enabled = true;

                }
                if (pageCount > 1)
                {
                    txtCurentPage.Enabled = true;
                }
                else
                {
                    txtCurentPage.Enabled = false;
                }
            }
            catch (Exception)
            {
            }
        }

        /// <summary>
        /// 获得总页数
        /// </summary>
        /// <returns></returns>
        public int GetTotalCount()
        {
            int count;
            if (DataCount % PageSize == 0)
                count = DataCount / PageSize;
            else
                count = DataCount / PageSize + 1;
            return count;
        }
    }
}