datalist分页

 PagedDataSource pages;
    protected void Page_Load(object sender, EventArgs e)
    {
        DatalistBind();
    }

  private  void DatalistBind()
    {
        using (SqlConnection sqlcon = new SqlConnection("server=.;uid=sa;pwd=sa;database=xiaoxiDemo"))
       {
           int count = Convert.ToInt32(this.Label1.Text);
            SqlDataAdapter sqlda = new SqlDataAdapter("select * from xi",sqlcon);
            DataSet dt = new DataSet();
            sqlda.Fill(dt, "xi");
            pages = new PagedDataSource();
            pages.DataSource = dt.Tables[0].DefaultView;
            pages.AllowPaging = true;
            pages.PageSize =6;
            pages.CurrentPageIndex = count- 1;
            this.DataList1.DataSource = pages;
            this.DataList1.DataBind();
            this.Button2.Enabled = true;
            this.Button3.Enabled = true;
            if (count == 1)
            {
                this.Button2.Enabled=false;
            }
            if (count==pages.Count)
            {
                this.Button3.Enabled = false;
            }
        }
       
    }
    //上一页
    protected void Button2_Click(object sender, EventArgs e)
    {
        this.Label1.Text = Convert.ToString(Convert.ToInt32(this.Label1.Text)- 1);
        DatalistBind();
    }
    //下一页
    protected void Button3_Click(object sender, EventArgs e)
    {
        this.Label1.Text = Convert.ToString(Convert.ToInt32(this.Label1.Text)+1);
        DatalistBind();
    }
    //删除
    protected void LinkButton1_Command(object sender, CommandEventArgs e)
    {
        using (SqlConnection sqlcon = new SqlConnection("server=.;uid=sa;pwd=sa;database=xiaoxiDemo"))
        {
            sqlcon.Open();
            SqlCommand sqlcmds = new SqlCommand("delete from xi where xi_id="+e.CommandArgument+"",sqlcon);
            sqlcmds.ExecuteNonQuery();
            sqlcon.Close();
        }
    }
    //首页
    protected void Button1_Click(object sender, EventArgs e)
    {
        this.Label1.Text = "1";
        DatalistBind();
    }

    //尾页
    protected void Button4_Click(object sender, EventArgs e)
    {
        this.Label1.Text = pages.Count.ToString();
        DatalistBind();
    }