default.aspx.cs

征服ASP.NET 2.0 Ajax 典型应用源码

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using AjaxControlToolkit;
public partial class Rating_Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            if (Session["rating1"] != null)//第一种水果已经评价
            {
                ifRating(Rating1, Label1);
            }
            if (Session["rating2"] != null)//第二种水果已经评价
            {
                ifRating(Rating2, Label2);
            }
            if (Session["rating3"] != null)//第三种水果已经评价
            {
                ifRating(Rating3, Label3);
            }
        }
    }
    //评价第一种水果
    protected void Rating_Changed1(object sender, AjaxControlToolkit.RatingEventArgs e)
    {
        RatingChange(Rating1, Label1, e.Value);
    }
    //评价第二种水果
    protected void Rating_Changed2(object sender, AjaxControlToolkit.RatingEventArgs e)
    {
        RatingChange(Rating2, Label2, e.Value);
    }
    //评价第三种水果
    protected void Rating_Changed3(object sender, AjaxControlToolkit.RatingEventArgs e)
    {
        RatingChange(Rating3, Label3, e.Value);
    }
    //根据session判断，对已经评价过的，显示本人的评价结果，并且不能再次评价
    private void ifRating(Rating r, Label l)
    {
        r.CurrentRating = int.Parse(Session[r.ID].ToString());//显示评价结果
        l.Text = Session[r.ID].ToString();
        r.ReadOnly = true;//不能再评价
    }
    //作出评价
    private void RatingChange(Rating r, Label l, string mark)
    {
        Session.Add(r.ID, mark);//session中记录本次评价，防止多次评价
        r.ReadOnly = true;//不可再评价了
        l.Text = mark;//显示本次评价的结果
        RatingRecord rr = new RatingRecord();
        string clas = string.Empty;//被评价的水果的名称
        switch (r.ID)//获取被评价的水果的名称
        {
            case "Rating1": clas = "苹果"; break;
            case "Rating2": clas = "香蕉"; break;
            case "Rating3": clas = "西红柿"; break;
        }
        rr.Insert(clas, mark);//记录下本次评价
    }
    //异步调用发生错误时调用
    protected void ScriptManager1_AsyncPostBackError(object sender, AsyncPostBackErrorEventArgs e)
    {
    }
    //查看评价结果
    protected void Button1_Click(object sender, EventArgs e)
    {
        RatingRecord rr = new RatingRecord();//评价记录
        string result = string.Empty;//要显示的字符串
        string format = "{0}: 1星{1}个　2星{2}个　3星{3}个　4星{4}个　5星{5}个<br/>";//格式化字符串
        result += string.Format(format, "苹　果", rr.Count("苹果", "1"), rr.Count("苹果", "2"), rr.Count("苹果", "3"), rr.Count("苹果", "4"), rr.Count("苹果", "5"));
        result += string.Format(format, "西红柿", rr.Count("西红柿", "1"), rr.Count("西红柿", "2"), rr.Count("西红柿", "3"), rr.Count("西红柿", "4"), rr.Count("西红柿", "5"));
        result += string.Format(format, "香　蕉", rr.Count("香蕉", "1"), rr.Count("香蕉", "2"), rr.Count("香蕉", "3"), rr.Count("香蕉", "4"), rr.Count("香蕉", "5"));
        Label temp = (Label)UpdatePanel11.FindControl("Label4");//用于显示结果的label
        temp.Text = result;//显示
    }
}