【ASP】DataList控件分页操作

描述：DataList通过模板自定义实现分页，增删改查等操作

注意两个引用
using System.Data;
using System.Data.SqlClient;

        public void datalist()
        {
            PagedDataSource ps = new PagedDataSource();      //实例化数据源
            int dangpage = Convert.ToInt32(danglbl.Text);     //定义当前页面

            SqlConnection con = new SqlConnection("server=.;database=student;integrated security=true");
            SqlDataAdapter da = new SqlDataAdapter("select * from stuInfo", con);
            DataSet ds = new DataSet();
            da.Fill(ds);
            ps.DataSource = ds.Tables[0].DefaultView;    //显示数据
            ps.AllowPaging = true;                           //允许分页
            ps.PageSize = 2;                                     //每页显示的数据条数
            ps.CurrentPageIndex = dangpage - 1;        //当前页的索引
            
            lbtf.Enabled = true;
            lbts.Enabled = true;
            lbtx.Enabled = true;
            lbth.Enabled = true;

            if (dangpage == 1)
            {
                lbtf.Enabled = false;
                lbts.Enabled = false;
            }
            else if (dangpage == ps.PageCount)
            {
                lbtx.Enabled = false;
                lbth.Enabled = false;
            }
            zonglbl.Text = ps.PageCount.ToString();            //总页数
            DataList1.DataSource = ps;                    //绑定分页数据源
            DataList1.Caption = "学生信息表";      //定义表名
            DataList1.DataKeyField="sno";         //设置主键
            DataList1.DataBind();
        }
 //首页
        protected void lbtf_Click(object sender, EventArgs e)
        {
            danglbl.Text= "1";
            this.datalist();
        }
//上一页
        protected void lbts_Click(object sender, EventArgs e)
        {
            danglbl.Text = (Convert.ToInt32(danglbl.Text) - 1).ToString();
            this.datalist();
        }
//下一页
       protected void lbtx_Click(object sender, EventArgs e)
        {
            danglbl.Text = (Convert.ToInt32(danglbl.Text) + 1).ToString();
            this.datalist();
        }
//尾页
        protected void lbth_Click(object sender, EventArgs e)
        {
            danglbl.Text = zonglbl.Text;
            this.datalist();
        }
//查看详细信息
        protected void DataList1_ItemCommand(object source, DataListCommandEventArgs e)
        {
            if (e.CommandName == "select")
            {
                DataList1.SelectedIndex = e.Item.ItemIndex;
                this.datalist();
            }
            else if (e.CommandName == "back")
            {
                DataList1.SelectedIndex = -1;
                this.datalist();
            }
        }
//编辑信息
        protected void DataList1_EditCommand(object source, DataListCommandEventArgs e)
        {
            DataList1.EditItemIndex = e.Item.ItemIndex;
            this.datalist();
        }
//更新信息
        protected void DataList1_UpdateCommand(object source, DataListCommandEventArgs e)
        {
            string no = DataList1.DataKeys[e.Item.ItemIndex].ToString();
            string name = ((TextBox)e.Item.FindControl("TextBox2")).Text;
            string sex = ((TextBox)e.Item.FindControl("TextBox3")).Text;
            string age = ((TextBox)e.Item.FindControl("TextBox4")).Text;
            string adr= ((TextBox)e.Item.FindControl("TextBox5")).Text;
            SqlConnection con = new SqlConnection("server=.;database=student;integrated security=true");
            con.Open();
            SqlCommand cmd = new SqlCommand("update stuInfo set  sname='" + name + "',ssex='"+sex+"', sage='"+age+"', adress='"+adr+"' where sno='" + no + "'", con);
            cmd.ExecuteNonQuery();
            con.Close();
            DataList1.EditItemIndex = -1;
            this.datalist();
           
        }
//取消编辑
        protected void DataList1_CancelCommand(object source, DataListCommandEventArgs e)
        {
            DataList1.EditItemIndex = -1;
            this.datalist();
        }
    }

 //删除信息

  protected void DataList1_DeleteCommand(object source, DataListCommandEventArgs e)
        {

             if (e.CommandName == "delete")
              {
                string id = DataList1.DataKeys[e.Item.ItemIndex].ToString();
                modeljiangjin.jjid = Convert.ToInt32(id);

               dal.jiangjinDAL djd = new dal.jiangjinDAL();
                bool ds = djd.Delectjiangjin(modeljiangjin);
                if (ds == true)
                {
                    //DataList1.EditItemIndex = -1;
                    this.BDdeletejiangjin();
                }
                 Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('删除成功！'); ", true);
                //Response.Redirect("/admin/a_deletejiangjin");
            }
            else
            {
                Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('对不起，删除失败，请重新操作！'); ", true);
            }
        }
}