using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Linq;
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using System.Text;
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namespace DPumpHydr.WinFrmUI.WenSkin.Controls.Paging
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{
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public class WenDataTablePaging : WenPaging
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{
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public WenDataTablePaging() : base()
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{
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}
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#region 公有属性
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private PagingPageCollection items;
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private object dataSource;
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#endregion
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#region 公有属性
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[Category("Wen"), Description("获取或设置每一页设置数量数量"), DefaultValue(100)]
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public int PageRowCount { get; set; } = 100;
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[Category("Wen"), Description("获取设置单项数据"), DefaultValue(null)]
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[DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
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[Editor(typeof(Design.Editor.WenCollectionEditor), typeof(System.Drawing.Design.UITypeEditor))]
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[EditorBrowsable(EditorBrowsableState.Always)]
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public PagingPageCollection Items => items ??= new PagingPageCollection(this);
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public object DataSource { get => dataSource; set { dataSource = value; DataBind(); } }
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#endregion
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private void DataBind()
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{
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Items.Clear();
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if (dataSource is DataTable dt)
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{
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//向上取整
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MaxPageCout = (int)Math.Ceiling((decimal)dt.Rows.Count / PageRowCount);
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for (int i = 1; i <= MaxPageCout; i++)
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{
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List<DataRow> dataRows = new List<DataRow>();
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for (int r = PageRowCount * (i - 1); r < (i * PageRowCount > dt.Rows.Count ? dt.Rows.Count : i * PageRowCount); r++)
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{
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dataRows.Add(dt.Rows[r]);
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}
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PagingPage paging = new PagingPage()
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{
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PageIndex = i,
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Value = dataRows.ToArray(),
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};
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Items.Add(paging);
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}
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OnPagingButtonClick(new PagingButtonClickEventArgs(1));
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}
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}
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#region 重写
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protected override void OnPagingButtonClick(PagingButtonClickEventArgs e)
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{
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base.OnPagingButtonClick(e);
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PagingPageChange?.Invoke(this, new PagingPageChangeEventArgs(e.PageIndex, Items[e.PageIndex-1]));
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}
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#endregion
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#region 委托
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public delegate void PagingPageChangeEventHandler(object sender, PagingPageChangeEventArgs e);
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[Category("Wen"), Description("绑定数据值变化事件")]
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public event PagingPageChangeEventHandler PagingPageChange;
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public class PagingPageChangeEventArgs : PagingButtonClickEventArgs
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{
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private readonly PagingPage pagingPage;
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public PagingPageChangeEventArgs(int pageIndex, PagingPage pagingPage) : base(pageIndex)
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{
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this.pagingPage = pagingPage;
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}
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public PagingPage PagingPage => pagingPage;
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}
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#endregion
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#region 子类
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[ToolboxItem(false)]
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[DesignTimeVisible(false)]
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public class PagingPage : Component
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{
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public object Value { get; set; }
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public int PageIndex { get; set; }
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public DataRow[] DataRows => Value as DataRow[];
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public DataTable DataTable
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{
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get
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{
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DataTable dt = DataRows[0].Table.Clone();
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foreach (DataRow dataRow in DataRows)
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{
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dt.Rows.Add(dataRow.ItemArray);
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}
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return dt;
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}
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}
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public override string ToString()
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{
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return PageIndex.ToString();
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}
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}
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public class PagingPageCollection : WenCollection
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{
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public PagingPageCollection(WenPaging owner)
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{
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this.owner = owner;
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}
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#region 私有属性
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private WenPaging owner;
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#endregion
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public PagingPage this[int index] => index < Items.Count ? Items[index] as PagingPage : null;
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}
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#endregion
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}
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}
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