103 lines
2.5 KiB
C#
103 lines
2.5 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Web;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Data;
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using System.Text;
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namespace FineUI.Examples.grid
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{
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public partial class grid_pageitems_pagesize_database : PageBase
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{
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protected void Page_Load(object sender, EventArgs e)
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{
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if (!IsPostBack)
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{
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BindGrid();
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ddlPageSize.SelectedValue = Grid1.PageSize.ToString();
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}
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}
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#region LoadData
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private void BindGrid()
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{
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// 1.设置总项数
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Grid1.RecordCount = GetTotalCount();
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// 2.获取当前分页数据
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DataTable table = GetPagedDataTable(Grid1.PageIndex, Grid1.PageSize);
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// 3.绑定到Grid
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Grid1.DataSource = table;
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Grid1.DataBind();
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}
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/// <summary>
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/// 模拟返回总项数
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/// </summary>
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/// <returns></returns>
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private int GetTotalCount()
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{
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return GetDataTable2().Rows.Count;
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}
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/// <summary>
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/// 模拟数据库分页
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/// </summary>
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/// <returns></returns>
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private DataTable GetPagedDataTable(int pageIndex, int pageSize)
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{
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DataTable source = GetDataTable2();
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DataTable paged = source.Clone();
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int rowbegin = pageIndex * pageSize;
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int rowend = (pageIndex + 1) * pageSize;
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if (rowend > source.Rows.Count)
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{
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rowend = source.Rows.Count;
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}
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for (int i = rowbegin; i < rowend; i++)
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{
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paged.ImportRow(source.Rows[i]);
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}
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return paged;
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}
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#endregion
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#region Events
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protected void Button1_Click(object sender, EventArgs e)
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{
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labResult.Text = HowManyRowsAreSelected(Grid1);
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}
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protected void Grid1_PageIndexChange(object sender, FineUI.GridPageEventArgs e)
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{
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Grid1.PageIndex = e.NewPageIndex;
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BindGrid();
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}
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protected void ddlPageSize_SelectedIndexChanged(object sender, EventArgs e)
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{
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Grid1.PageSize = Convert.ToInt32(ddlPageSize.SelectedValue);
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// 更改每页显示数目时，防止 PageIndex 越界
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if (Grid1.PageIndex > Grid1.PageCount - 1)
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{
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Grid1.PageIndex = Grid1.PageCount - 1;
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}
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BindGrid();
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}
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#endregion
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}
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}
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