KJD/TEMUKJD/UserControls/UcSplitPage.cs

using NaiBa.Util.Extension;
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 TemuKJD.UserControls
{
	public partial class UcSplitPage : UserControl
	{
		/// <summary>
		/// 是否显示每页条数(启用每页条数功能)
		/// </summary>
		[Description("显示每页条数"), Category("UserProperty")]
		public bool IsShowPageSize
		{
			get
			{
				return this.cmbPageSize.Visible;
			}
			set
			{
				if (cmbPageSize.Visible != value)
				{
					this.lblPageSize.Visible = this.cmbPageSize.Visible = value;
					this.Invalidate();
				}
			}
		}

		int maxPageSizeValue = 5000;
        /// <summary>
        /// 是否显示每页条数(启用每页条数功能)
        /// </summary>
        [Description("每页条数最大值"), Category("UserProperty")]
        public int MaxPageSizeValue
        {
            get
            {
                return maxPageSizeValue;
            }
            set
            {
                if (maxPageSizeValue != value)
                {
                    maxPageSizeValue = value;
                    foreach (var item in new string[] { "50", "100","200","500","1000","2000","5000" })
					{
						if (item.ParseToInt() > maxPageSizeValue)
							this.cmbPageSize.Items.Remove(item);
					}
                    this.Invalidate();
                }
            }
        }
        /// <summary>
        /// 是否显示总条数
        /// </summary>
        [Description("显示总条数"), Category("UserProperty")]
		public bool IsShowTotalCount
		{
			get
			{
				return this.lblTotal.Visible;
			}
			set
			{
				if (lblTotal.Visible != value)
				{
				 this.lblTotal.Visible = value;
					this.Invalidate();
				}
			}
		}
        long totalCount = 0;
		/// <summary>
		/// 总数量
		/// </summary>
		[Description("总数量"), Category("UserProperty")]
		public long TotalCount
		{
			get { return totalCount; }
			set
			{
				if (totalCount != value && value >= 0)
				{
					totalCount = value;
					// 根据总数量和每页条数计算总页数
					int pageSize = this.PageSize;
					if (pageSize > 0)
					{
						this.TotalPage = (int)Math.Ceiling((double)totalCount / pageSize);
					}
					else
					{
						this.TotalPage = 1;
					}
					Refresh();
				}
			}
		}

		int totalPage = 1;
		public int TotalPage
		{
			get { return totalPage; }
			set
			{
				if (totalPage != value && value > 0)
				{
					totalPage = value;
					Refresh();
				}
			}
		}

		int currentPage = 1;
		public int CurrentPage
		{
			get { return currentPage; }
			set
			{
				// 确保当前页不超过总页数
				int newPage = Math.Max(1, Math.Min(totalPage, value));
				if (currentPage != newPage)
				{
					currentPage = newPage;
					Refresh();
				}
				OnPageChange(this);
			}
		}

		[Description("每页条数"), Category("UserProperty")]
		public int PageSize
		{
			get
			{
				int pageSize = 50;
				if (InvokeRequired)
				{
					Invoke(new Action(() =>
					{
						pageSize = Math.Max(this.cmbPageSize.Text.ParseToInt(), 1);
					}));
				}
				else
					pageSize = Math.Max(this.cmbPageSize.Text.ParseToInt(), 1);
				return pageSize;
			}
			set
			{
				if (InvokeRequired)
				{
					Invoke(new Action(() =>
					{
						if (this.cmbPageSize.Text.ParseToInt() != value)
							this.cmbPageSize.Text = value.ParseToString();
						else
							this.cmbPageSize.Text = value.ParseToString();
					}));
				}
				else
				{
					if (this.cmbPageSize.Text.ParseToInt() != value)
						this.cmbPageSize.Text = value.ParseToString();
					else
						this.cmbPageSize.Text = value.ParseToString();
				}
				// 当每页条数变化时，重新计算总页数
				if (totalCount > 0)
				{
					this.TotalPage = (int)Math.Ceiling((double)totalCount / value);
					// 确保当前页不超过新的总页数
					if (this.CurrentPage > this.TotalPage)
					{
						this.CurrentPage = this.TotalPage;
					}
				}
				//OnPageChange(this);
			}
		}

		public event Action<object> PageChange;
		protected virtual void OnPageChange(object sender)
		{
			this.PageChange?.Invoke(sender);
		}

		public UcSplitPage()
		{
			InitializeComponent();
		}

		private void pnlJump_Click(object sender, EventArgs e)
		{
			int page = this.txtJumpPage.Text.ParseToInt();
			this.CurrentPage = Math.Max(1, page);

		}

		private void btnPrev_Click(object sender, EventArgs e)
		{
			int page = this.CurrentPage - 1;
			this.CurrentPage = Math.Max(1, page);
		}

		private void btnNext_Click(object sender, EventArgs e)
		{
			int page = this.CurrentPage + 1;
			this.CurrentPage = Math.Min(totalPage, page);
		}
		private void Refresh()
		{
			Invoke(new Action(() =>
			{
				lblPage.Text = $"{currentPage}/{TotalPage}页";
				lblTotal.Text = $"共{TotalCount}条";
			}));
			
        }
	}
}