DW5S/DW5S.App/UserControl/CtrlPaging.cs

using DevExpress.XtraEditors;
using DW5S.Repostory;
using ExtensionsDev;
using System;
using System.Linq;
using System.Threading.Tasks;

namespace DW5S.App.UserControl
{
    public partial class CtrlPaging : DevExpress.XtraEditors.XtraUserControl
    {
        public delegate Task CurrentPageEventHandler(int currentPage);
        /// <summary>
        /// 当前页数改变事件 当前页数
        /// </summary>
        public event CurrentPageEventHandler CurrentPageChanged;


        public delegate Task PageCountEventHandler(int pageCount);
        /// <summary>
        /// 每页条数改变事件 每页条数
        /// </summary>
        public event PageCountEventHandler PageCountChanged;

        /// <summary>
        /// 总条数
        /// </summary>
        private int TotalCount { get; set; } = 0;
        /// <summary>
        /// 总页数
        /// </summary>
        private int TotalPage { get; set; } = 0;
        /// <summary>
        /// 当前页数
        /// </summary>
        private int CurrentPage { get; set; } = 1;
        public CtrlPaging()
        {
            InitializeComponent();
            this.layoutControl1.UseDefault();
        }
        public async Task LoadData(int totalCount, int currentPage)
        {
            try
            {
                this.TotalCount = totalCount;
                this.CurrentPage = currentPage;
                var countPerPage = Convert.ToInt32(txtCountPerPage.Text);
                this.TotalPage = TotalCount / countPerPage;
                if (TotalCount % countPerPage != 0)
                    TotalPage++;
                if (TotalPage == 1)
                {
                    dataNavigator1.Buttons.First.Enabled = false;
                    dataNavigator1.Buttons.PrevPage.Enabled = false;
                    dataNavigator1.Buttons.Last.Enabled = false;
                    dataNavigator1.Buttons.NextPage.Enabled = false;
                }
                dataNavigator1.TextStringFormat = $"第{CurrentPage}页/共{TotalPage}页";
            }
            catch (Exception ex)
            {
                 IocContainer.Logger.Error(ex,"加载星历信息异常");
                DxHelper.MsgBoxHelper.ShowError("加载星历信息异常");
            }
        }


        private async void dataNavigator1_ButtonClick(object sender, NavigatorButtonClickEventArgs e)
        {
            if (e.Button.ButtonType == NavigatorButtonType.First)
            {
                CurrentPage = 1;
                dataNavigator1.Buttons.First.Enabled = false;
                dataNavigator1.Buttons.PrevPage.Enabled = false;
                dataNavigator1.Buttons.Last.Enabled = true;
                dataNavigator1.Buttons.NextPage.Enabled = true;

            }
            else if (e.Button.ButtonType == NavigatorButtonType.Last)
            {
                CurrentPage = TotalPage;
                dataNavigator1.Buttons.Last.Enabled = false;
                dataNavigator1.Buttons.NextPage.Enabled = false;
                dataNavigator1.Buttons.First.Enabled = true;
                dataNavigator1.Buttons.PrevPage.Enabled = true;
            }
            else if (e.Button.ButtonType == NavigatorButtonType.NextPage)
            {
                CurrentPage++;
                dataNavigator1.Buttons.First.Enabled = true;
                dataNavigator1.Buttons.PrevPage.Enabled = true;
                if (CurrentPage >= TotalPage)
                {
                    dataNavigator1.Buttons.Last.Enabled = false;
                    dataNavigator1.Buttons.NextPage.Enabled = false;
                }
                else
                {
                    dataNavigator1.Buttons.Last.Enabled = true;
                    dataNavigator1.Buttons.NextPage.Enabled = true;
                }
            }
            else if (e.Button.ButtonType == NavigatorButtonType.PrevPage)
            {
                CurrentPage--;
                dataNavigator1.Buttons.Last.Enabled = true;
                dataNavigator1.Buttons.NextPage.Enabled = true;
                if (CurrentPage == 1)
                {
                    dataNavigator1.Buttons.First.Enabled = false;
                    dataNavigator1.Buttons.PrevPage.Enabled = false;
                }
            }
            await CurrentPageChanged?.Invoke(CurrentPage);
            dataNavigator1.TextStringFormat = $"第{CurrentPage}页/共{TotalPage}页";
        }

        private async void btnGo_Click(object sender, EventArgs e)
        {
            int.TryParse(txtGoPage.Text, out int _currentPage);
            if (_currentPage > TotalPage)
            {
                _currentPage = TotalPage;
            }
            if (_currentPage > 0)
            {
                CurrentPage = _currentPage;
                if (CurrentPage == 1 && CurrentPage < TotalPage)
                {
                    dataNavigator1.Buttons.First.Enabled = false;
                    dataNavigator1.Buttons.PrevPage.Enabled = false;
                    dataNavigator1.Buttons.Last.Enabled = true;
                    dataNavigator1.Buttons.NextPage.Enabled = true;
                }
                else if (CurrentPage == 1 && CurrentPage == TotalPage)
                {
                    dataNavigator1.Buttons.First.Enabled = false;
                    dataNavigator1.Buttons.PrevPage.Enabled = false;
                    dataNavigator1.Buttons.First.Enabled = false;
                    dataNavigator1.Buttons.PrevPage.Enabled = false;
                }
                else if (CurrentPage == TotalPage)
                {
                    dataNavigator1.Buttons.First.Enabled = true;
                    dataNavigator1.Buttons.PrevPage.Enabled = true;
                    dataNavigator1.Buttons.Last.Enabled = false;
                    dataNavigator1.Buttons.NextPage.Enabled = false;
                    if (dataNavigator1.Position == 0)
                        dataNavigator1.Position = 1;
                }
                else
                {
                    dataNavigator1.Buttons.First.Enabled = true;
                    dataNavigator1.Buttons.PrevPage.Enabled = true;
                    dataNavigator1.Buttons.Last.Enabled = true;
                    dataNavigator1.Buttons.NextPage.Enabled = true;
                    dataNavigator1.Position = 1;
                }
                await CurrentPageChanged(CurrentPage);
                dataNavigator1.TextStringFormat = $"第{CurrentPage}页/共{TotalPage}页";

            }
        }

        private async void txtCountPerPage_EditValueChanged(object sender, EventArgs e)
        {
            int.TryParse(txtCountPerPage.Text, out int countPerPage);
            if (countPerPage > 0)
            {
                this.TotalPage = TotalCount / countPerPage;
                if (TotalCount % countPerPage != 0)
                    TotalPage++;
                if (CurrentPage > TotalPage)
                    CurrentPage = TotalPage;
                if (CurrentPage == 1 && CurrentPage < TotalPage)
                {
                    dataNavigator1.Buttons.First.Enabled = false;
                    dataNavigator1.Buttons.PrevPage.Enabled = false;
                    dataNavigator1.Buttons.Last.Enabled = true;
                    dataNavigator1.Buttons.NextPage.Enabled = true;
                }
                else if (CurrentPage == 1 && CurrentPage == TotalPage)
                {
                    dataNavigator1.Buttons.First.Enabled = false;
                    dataNavigator1.Buttons.PrevPage.Enabled = false;
                    dataNavigator1.Buttons.First.Enabled = false;
                    dataNavigator1.Buttons.PrevPage.Enabled = false;
                }
                else if (CurrentPage == TotalPage)
                {
                    dataNavigator1.Buttons.First.Enabled = true;
                    dataNavigator1.Buttons.PrevPage.Enabled = true;
                    dataNavigator1.Buttons.Last.Enabled = false;
                    dataNavigator1.Buttons.NextPage.Enabled = false;
                }
                else
                {
                    dataNavigator1.Buttons.First.Enabled = true;
                    dataNavigator1.Buttons.PrevPage.Enabled = true;
                    dataNavigator1.Buttons.Last.Enabled = true;
                    dataNavigator1.Buttons.NextPage.Enabled = true;
                    dataNavigator1.Position = 1;
                }
                await PageCountChanged?.Invoke(CurrentPage);
                dataNavigator1.TextStringFormat = $"第{CurrentPage}页/共{TotalPage}页";
            }
        }
    }
}