ASP.NET WebForms DataList 分页与批量操作实战

在 ASP.NET WebForms 开发中，DataList 控件提供了极高的模板自定义能力，但也需要手动处理分页逻辑。下面是一个完整的页面类示例，展示了如何通过 PagedDataSource 实现数据分页，以及如何处理全选和命令事件。

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

public partial class pages_DataList : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindData();
        }
    }

    // 数据绑定核心逻辑
    public void BindData()
    {
        DataTable dt = new DataTable("blog");
        DataColumn dc1 = new DataColumn("id", typeof(int));
        dc1.AutoIncrement = true;
        dt.Columns.Add(dc1);
        DataColumn dc2 = new DataColumn("blogname", typeof(string));
        dt.Columns.Add(dc2);
        DataColumn dc3 = new DataColumn("blogurl", ());
        dt.Columns.Add(dc3);
        DataColumn dc4 =  DataColumn(, ());
        dt.Columns.Add(dc4);

        DataRow dr1 = dt.NewRow();
        dr1[] = ;
        dr1[] = ;
        dr1[] = ;
        dt.Rows.Add(dr1);

        DataRow dr2 = dt.NewRow();
        dr2[] = ;
        dr2[] = ;
        dr2[] = ;
        dt.Rows.Add(dr2);

        DataRow dr3 = dt.NewRow();
        dr3[] = ;
        dr3[] = ;
        dr3[] = ;
        dt.Rows.Add(dr3);

        DataRow dr4 = dt.NewRow();
        
        dr4[] = ;
        dr4[] = ;
        dr4[] = ;
        dt.Rows.Add(dr4);

        PagedDataSource pds =  PagedDataSource();
        pds.DataSource = dt;
        pds.AllowPaging = ;
        pds.PageSize = ;
        
         (lblPresentPage.Text != )
        {
            pds.CurrentPageIndex = Convert.ToInt32(lblPresentPage.Text);
        }

        .DataList1.DataSource = pds;
        .DataBind();
    }

    
    
    {
         (.btnCheckOrCancle.Text == )
        {
             (DataListItem dl  .DataList1.Items)
            {
                CheckBox cb = (CheckBox)dl.FindControl();
                 (cb != ) cb.Checked = ;
            }
            .btnCheckOrCancle.Text = ;
        }
        
        {
             (DataListItem dl  .DataList1.Items)
            {
                CheckBox cb = (CheckBox)dl.FindControl();
                 (cb != ) cb.Checked = ;
            }
            .btnCheckOrCancle.Text = ;
        }
    }

    
    {
         (e.CommandSource.GetType() == (LinkButton))
        {
             (((LinkButton)e.CommandSource).CommandName == )
            {
                Response.Write();
            }
        }
    }

    
    
    {
        lblPresentPage.Text = ;
        BindData();
    }

    
    
    {
         index = Convert.ToInt32(lblPresentPage.Text);
         (index > )
        {
            lblPresentPage.Text = (index - ).ToString();
            BindData();
        }
    }

    
    
    {
         index = Convert.ToInt32(lblPresentPage.Text);
        
        lblPresentPage.Text = (index + ).ToString();
        BindData();
    }
}