DW5S/DW5S.App/UserControl/CtrlPage.cs

using DevExpress.XtraEditors;
using DevExpress.XtraPrinting.Native;
using DW5S.DTO;
using DW5S.Entity;
using DW5S.Repostory;
using ExtensionsDev;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Linq.Expressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace DW5S.App.UserControl
{

    public partial class CtrlPage : DevExpress.XtraEditors.XtraUserControl
    {
        private event Func<PageQueryDto, Task<DTO.PageData>> OnQueryAsync;

        public void SetOnQuery(Func<PageQueryDto, Task<DTO.PageData>> onQueryAsync)
        {
            this.OnQueryAsync += onQueryAsync;
            RefreshData();
        }

        private bool comPact = false;

        /// <summary>
        /// 紧凑模式(默认false)
        /// </summary>
        [ToolboxItem(false)]
        [DefaultValue(false)]
        [Category("Style"), Description("紧凑模式")]
        public bool Compact
        {
            get
            {
                return comPact;
            }
            set
            {
                comPact = value;
                if (comPact)
                {
                    foreach (Control item in this.stackPanel1.Controls)
                    {
                        item.Margin = new Padding(2);
                        if (item.GetType() == typeof(Button))
                            item.Width = 14;
                    }
                    txtCountPerPage.Width = 60;
                    txtGoPage.Width = 60;
                }
                else
                {
                    foreach (Control item in this.stackPanel1.Controls)
                    {
                        item.Margin = new Padding(2);
                        if (item.GetType() == typeof(Button))
                            item.Width = 20;
                    }
                    btnFirst.Margin = new System.Windows.Forms.Padding(20, 3, 3, 3);
                    txtPageInfo.Margin = new System.Windows.Forms.Padding(10, 3, 10, 3);
                    txtGoPage.Margin = new System.Windows.Forms.Padding(20, 3, 3, 3);
                    this.txtCountPerPage.Width = 76;
                    txtGoPage.Width = 76;
                }
            }
        }

        public bool showGoto = true;

        /// <summary>
        /// 是否显示跳转(模式true)
        /// </summary>
        [ToolboxItem(true)]
        [Category("Style"), Description("是否显示跳转")]
        [DefaultValue(true)]
        public bool ShowGoto
        {
            get
            {
                return showGoto;
            }
            set
            {
                showGoto = value;
                this.txtGoPage.Visible = value;
                this.btnGo.Visible = value;
            }
        }

        /// <summary>
        /// 当前页数
        /// </summary>
        private int CurrentPage { get; set; } = 1;
        public CtrlPage()
        {
            InitializeComponent();
            this.MinimumSize = new System.Drawing.Size(100, 26);
        }

        /// <summary>
        /// 刷新数据(当前页会变为1)
        /// </summary>
        public void RefreshData()
        {
            btn_Click(btnFirst, null);
        }
        private void txtCountPerPage_EditValueChanged(object sender, EventArgs e)
        {
            btn_Click(btnFirst, null);
        }
        private async void btn_Click(object sender, EventArgs e)
        {
            try
            {
                if (OnQueryAsync == null) return;
                if (sender == btnFirst)
                {
                    this.CurrentPage = 1;
                }
                else if (sender == btnPrev)
                {
                    if (this.CurrentPage > 1)
                        this.CurrentPage--;
                }
                else if (sender == btnNext)
                {
                    this.CurrentPage++;
                }
                else if (sender == btnLast)
                {
                    this.CurrentPage = int.MaxValue;
                }
                else
                {
                    int.TryParse(txtGoPage.Text, out int currentPage);
                    if (currentPage <= 0) return;
                    this.CurrentPage = currentPage;
                }
                int.TryParse(txtCountPerPage.Text, out int countPerPage);
                if (countPerPage <= 0)
                {
                    countPerPage = (int)txtCountPerPage.Properties.Items[0];
                }
                this.Enabled = false;
                var pageData = await this.OnQueryAsync(new PageQueryDto()
                {
                    CountPerPage = countPerPage,
                    Page = CurrentPage,
                });
                this.CurrentPage = pageData.Page;
                txtPageInfo.Text = $"第{pageData.Page}页/共{pageData.TotalPage}页";
            }
            catch (Exception ex)
            {
                IocContainer.Logger.Error(ex, $"分页查询异常");
            }
            finally
            {
                this.Enabled = true;
            }
        }
    }
}