绑定Repeater实现分页获取数据

蔚落 2022-08-19 11:09 90阅读 0赞

<pre name="code" class="csharp">public partial class _Default : System.Web.UI.Page 
    {
        int currentpage = 0;
        int indexSize = 2;
        protected void Page_Load(object sender, EventArgs e)
        {
           
            if (!IsPostBack)
            {
                List<string> values = new List<string>();
    
                values.Add("Apple");
                values.Add("Orange");
                values.Add("Pear");
                values.Add("Banana");
                values.Add("Grape");
    
                rpt.DataSource = values;
                rpt.DataBind();
                Session.Add("pageSize", indexSize);
                Session.Add("source", values);
              
            }
    
        }
        private List<string> get(int index)
        {
            List<string> data = (List<string>)Session["source"];
            List<string> result = new List<string>();
            int pageSize= (int)Session["pageSize"];
            int bigIndex = (int)System.Math.Ceiling(Convert.ToDecimal(data.Count) / indexSize);
            if (bigIndex<index)
            {
                return new List<string>();
            }
            int first = index == 1 ? 0 : (index - 1) * indexSize;
            int end = bigIndex == index ? data.Count : index* pageSize;
            for (int i = first; i < end; i++)
            {
                result.Add(data[i]);
            }
            return result;
        }
        protected void pageindex_TextChanged(object sender, EventArgs e)
        {
            bool success = Int32.TryParse(pageindex.Text, out currentpage );
            if (success)
            {
                List<string> result = get(currentpage);
                rpt.DataSource = result;
                rpt.DataBind();
            }
           
        }
    }