【原创】模仿以前新浪播客的评星控件

        好长时间没有更新博客了，差点忘了这里还有我一个帐号， 呵呵
 这个控件还是春节时在家无聊时写的，后来就长眠在我的机器里了，今天无意中才发现，写的比较烂，有些功能还没有实现，所以请园子里的高手帮我改改。

代码下载

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Xml;
using System.IO;
using System.Collections.Specialized;


namespace StarLike
{
   
    [DefaultProperty("StarNum")]
    [ToolboxData("<{0}:StarLike runat=server></{0}:StarLike>")]
    public class StarLike : WebControl
    {

       
       
        字段#region 字段
        private EnumDB _selectDB;
        private string _xmldocpath;
        private int _starnum = 5;//默认设置5颗星
        private int playnum=0;     //播放次数
        private int attachnum;    //参与评论人数
        private string playurl;
        System.Collections.ArrayList fimgList = null;
        System.Collections.ArrayList imgList = null;
        Image fimage = null;//评级档案
        Image image = null;//评级图片
        #endregion
        属性#region 属性
        
        [Description("设置显示几颗星")]
        [DefaultValue(5)]
        [Browsable(false)]
        public int StarNum
        {
            get { return _starnum; }
            set { _starnum = value; }
        }
        
        [Description("选择数据存放位置")]
        public EnumDB SelectDB
        {
            get { return _selectDB; }
            set { _selectDB = value; }
        }
        [Description("设置创建XML文档的位置，网站虚拟路径如：xmldrv/xmldoc.xml")]
        public string XMLDocPath
        {
            get { return _xmldocpath; }
            set { _xmldocpath = value; }
        }
        #endregion
        重载方法#region 重载方法
        protected override void OnInit(EventArgs e)
        {
           GetPlayURLQuest();
          
            base.OnInit(e);
        }
        protected override void RenderContents(HtmlTextWriter output)
        {
            EnsureChildControls();//如果子控件不存在则创建
            RenderChildren(output);
        }
        /**//// <summary>
        /// 创建子控件
        /// </summary>
        protected override void CreateChildControls()
        {
            
            Controls.Clear();
            ClearChildControlState();
            TrackViewState();
            Create_MyChildControl();//创建自定义子控件
            Prepare_ControlHierarchy();//排序子控件
           
            base.CreateChildControls();
        }
        
        /**//// <summary>
        /// 注册Javascript
        /// </summary>
        /// <param name="e"></param>
        protected override void OnPreRender(EventArgs e)
        {
            
            Page.ClientScript.RegisterStartupScript(this.GetType(), Guid.NewGuid().ToString(), BuildingScript());
            base.OnPreRender(e);
           
        }
        #endregion
        私有方法#region 私有方法
        /**//// <summary>
        /// 创建自定义子控件
        /// </summary>
        private void Create_MyChildControl()
        {
            fimgList = new System.Collections.ArrayList();
            for (int i = 1; i <= _starnum; i++)
            {
                fimage = new Image();
                fimage.ID = "fstar" + i.ToString();
                fimage.ImageUrl = "image\\v2_gx_hxx2.gif";
                fimgList.Add(fimage);
            }
           
            imgList = new System.Collections.ArrayList();
           
            for (int i = 1; i <= _starnum; i++)
            {
               
                image = new Image();
                image.ID = "star" + i.ToString();
                image.ImageUrl = "image\\v2_gx_hxx2.gif";
                image.Attributes.Add("onMouseOver", "mn(" + i + ")");
                image.Attributes.Add("onMouseOut", "mf(" + i + ")");
                image.Attributes.Add("onClick", "xl_mc(" + i + ",\"" + playnum + "\",\"" + playurl + "\"" + ",\"" + DateTime.Now.ToString("yyyy MM dd_hh:mm:ss") + "\")");
               
                
                imgList.Add(image);

            }
            image.Attributes.Add("onload","requestXMLDOM('XMLdoc/star.xml');");
            
        }
       
        /**//// <summary>
        /// 排序子控件
        /// </summary>
        private void Prepare_ControlHierarchy()
        {
            HtmlTable tb = new HtmlTable();
        
            tb.Width = "100%";
            HtmlTableRow tr = new HtmlTableRow();
            HtmlTableCell td1 = new HtmlTableCell();
            td1.ID = "td1";
            td1.Width = "100px";
          
            td1.InnerHtml = "<span id=\"playnum\"></apan>";
            tr.Controls.Add(td1);
            HtmlTableCell td2 = new HtmlTableCell();
            td2.ID = "td2";

            for (int i = 0; i < fimgList.Count; i++)
            {
                td2.Controls.Add(fimgList[i] as Image);
            }
            tr.Controls.Add(td2);
            
            HtmlTableCell td3 = new HtmlTableCell();
            td3.ID = "td3";
            td3.InnerHtml = "<span style=\"color:#666\" id=\"divattach\"></span>";
            tr.Controls.Add(td3);

            HtmlTableCell td4 = new HtmlTableCell();
            td4.Width = "100px";
            td4.ID = "td4";
            td4.InnerHtml = "<div id=\"desc\" style=\"color:#666\">请您评星：</div>";
            tr.Controls.Add(td4);
            HtmlTableCell td5 = new HtmlTableCell();
            td5.ID = "td5";
            for (int i = 0; i < imgList.Count; i++)
            {
                td5.Controls.Add(imgList[i] as Image);
            }
            tr.Controls.Add(td5);
            tb.Controls.Add(tr);
            this.Controls.Add(tb);
           
        }
        private string BuildingScript()
        {
            JavaScriptWriter js = new JavaScriptWriter(true);
            js.AddConnentLine("创建XMLHTTPRequest对象");
            js.AddLine(" var canstar=0;");
            js.AddLine("var xRequest=null;");
            js.AddLine("function getXMLHTTPRequest()");
            js.AddLine("{");
            js.AddLine("if(window.XMLHttpRequest)");
            js.AddLine("{");
            js.AddLine("xRequest=new XMLHttpRequest();");
            js.AddLine("}");
            js.AddLine("else if(typeof ActiveXObject)");
            js.AddLine("{");
            js.AddLine("xRequest=new ActiveXObject(\"Microsoft.XMLHTTP\");");
            js.AddLine("}");
            js.AddLine("return xRequest;");
            js.AddLine("}");

            js.AddConnentLine("发送请求");
            js.AddLine("function sendRequest(callback,url,params,HttpMethod){");
            js.AddLine("if (!HttpMethod){");
            js.AddLine("HttpMethod=\"POST\";");
            js.AddLine("}");
            js.AddLine("var req=getXMLHTTPRequest();");
            js.AddLine("if (req)");
            js.AddLine("{");
            js.AddLine("req.onreadystatechange= function() ");
            js.AddLine("{");
            js.AddLine("var ready=req.readyState;");
            js.AddLine("var data=null;");
            js.AddLine("if (ready==4)");
            js.AddLine("{");
            js.AddLine("data=req.responseXML;");
            js.AddLine("callback(data);");
            js.AddLine("} else ");
            js.AddLine("{");
            js.AddLine("data=\"loading[\"+ready+\"]\";");
            js.AddLine("}");
            js.AddLine("};");
            js.AddLine("req.open(HttpMethod,url,true);");
            js.AddLine("req.setRequestHeader(\"Content-Type\",\"application/x-www-form-urlencoded\");");
            js.AddLine("req.send(params);");
            js.AddLine("}");
            js.AddLine("}");

            js.AddConnentLine("获取getElementById对象");
            js.AddLine("function $(idname){");
            js.AddLine("if (document.getElementById){ return document.getElementById(idname); } ");
            js.AddLine("else if (document.all) { return document.all[idname];} ");
            js.AddLine("else if (document.layers) {    return document.layers[idname];    }");
            js.AddLine("else { return null; }");
            js.AddLine("}");

            //x选择星号的
            //playnum 播放媒体号
            //
            //date服务器时间
            js.AddLine("function xl_mc(x,playnum,playurl,date)");
            js.AddLine("{");
            js.AddLine("if(x>0)");
            js.AddLine("createCookie(playurl,date);");//创建Cookie
            js.AddLine("{ td5.innerHTML='<img src=image/v2_gx_pxjg'+x+'.gif>';");
            js.AddLine("desc.innerHTML='<img src=image/ajax_loader1.gif/>';");
            js.AddLine("var httprequest= sendRequest(star_callback,\"RequestStar.aspx\",\"starn=\"+x+\"&playnum=\"+playnum+\"&playurl=\"+playurl+\"&date=\"+date,\"POST\");");

            
            js.AddLine("");
            js.AddLine("}}");
            js.AddLine("");
            js.AddLine("function star_callback(data)");
            js.AddLine("{");
            js.AddLine("");
            js.AddLine("if(data==null)");
            js.AddLine("{desc.innerHTML=\"没有提交成功！\";");
            js.AddLine("}");
            js.AddLine("desc.innerHTML=data.getElementsByTagName('request')[0].getElementsByTagName('submitSuccess')[0].firstChild.nodeValue;");
            js.AddLine("divattach.innerHTML=data.getElementsByTagName('request')[0].getElementsByTagName('evaluationNum')[0].firstChild.nodeValue+'人评星';");
            //js.AddLine("requestXMLDOM('XMLdoc/star.xml');");
            js.AddLine("}");

            
            js.AddConnentLine("当鼠标移动到图片上时动态的显示评级信息");
            js.AddLine("function mn(x){");
            js.AddLine("var starnum=\"" + _starnum.ToString() + "\";");
            js.AddLine("var appraise=\"\";");
            js.AddLine("for(i=1;i<=x;i++){");
            js.AddLine("var starnum=\"star\"+i;");
            js.AddLine("var imgid=$(starnum);");
            js.AddLine("imgid.src=\"image/v2_gx_hxx1.gif\"");
            js.AddLine("var description=$(\"desc\");");
            js.AddLine("switch (i){");
            js.AddLine("case 1:");
            js.AddLine("appraise=\"太差劲了\";");
            js.AddLine("break;");
            js.AddLine("case 2:");
            js.AddLine("appraise=\"不怎么样\";");
            js.AddLine("break;");
            js.AddLine("case 3:");
            js.AddLine("appraise=\"还可以\";");
            js.AddLine("break;");
            js.AddLine("case 4:");
            js.AddLine("appraise=\"真不错\";");
            js.AddLine("break;");
            js.AddLine("case 5:");
            js.AddLine("appraise=\"太棒了\";");
            js.AddLine("break;");
            js.AddLine("default:");
            js.AddLine("appraise=\"出错了\";");
            js.AddLine("}");
            js.AddLine("description.style.color=\"#ff0000\"");
            js.AddLine("description.innerHTML=appraise;");
            js.AddLine("}}");

            js.AddLine("function mf(x)");
            js.AddLine("{");
            js.AddLine("for(i=1;i<=x;i++)");
            js.AddLine("{");
            js.AddLine("var starnum=\"star\"+i;");
            js.AddLine("var imgid=$(starnum);");
            js.AddLine("imgid.src=\"image/v2_gx_hxx2.gif\";");
            js.AddLine("var description=$(\"desc\");");
            js.AddLine("description.style.color=\"#666\"");
            js.AddLine("description.innerHTML=\"请您评星：\"");
            js.AddLine("}");
            js.AddLine("}");
            #region
            js.AddLine("var XMLDOM=null");
            js.AddLine("function requestXMLDOM(url)");
            js.AddLine("{");
            js.AddLine("if(window.ActiveXObject)");
            js.AddLine("{");
            js.AddLine("XMLDOM=new ActiveXObject(\"Microsoft.XMLDOM\");");
            js.AddLine("XMLDOM.onreadystatechange=xmlColback;");
            js.AddLine("XMLDOM.load(url);");
            js.AddLine("}");
            js.AddLine("}");
            js.AddLine("function xmlColback()");
            js.AddLine("{");
            js.AddLine("if(XMLDOM.readyState==4)");
            js.AddLine("{");
            js.AddLine("var rootNodes=XMLDOM.selectNodes(\"root/" + playurl + "\");");
            js.AddLine("var playnum=$('divattach');");
            js.AddLine("if(rootNodes.length!=0)");
            js.AddLine("{");
            js.AddLine("var lastnode=rootNodes.item(0).lastChild;");
            js.AddLine("var lastid=lastnode.getElementsByTagName(\"id\")[0].firstChild.nodeValue;");
            js.AddLine("var lastTotalScore=lastnode.getElementsByTagName(\"TotalScore\")[0].firstChild.nodeValue;");
            js.AddLine("playnum.innerHTML=lastid+'人评星';");
            js.AddLine("var average=lastTotalScore/lastid; ");//平均值
            js.AddLine("var j=0;");
            js.AddLine("var ronundvalue=Math.ceil(average)-1; ");//平均值的整数部分
            js.AddLine("var fstars=null;");
            js.AddLine("for(i=1;i<=ronundvalue;i++)");
            js.AddLine("{fstars=$('fstar'+i);j=i+1;");
            js.AddLine("fstars.src=\"Image/v2_gx_hxx1.gif\";");
            js.AddLine("}");
            js.AddLine("fstars=$('fstar'+j);");
            js.AddLine("var remainder=(average-ronundvalue)*10;");//小数部分
            js.AddLine("if(remainder>1 && remainder<3){");
            js.AddLine("fstars.src=\"Image/v2_gx_hxx3n1.gif\";}");
            js.AddLine("else if(remainder>=3 && remainder<7)");
            js.AddLine("{fstars.src=\"Image/v2_gx_hxx3n2.gif\";}");
            js.AddLine("else if(remainder>=7 && remainder<=9)");
            js.AddLine("{fstars.src=\"Image/v2_gx_hxx3n3.gif\";}");
            js.AddLine("else if(remainder==10){");
            js.AddLine("fstars.src=\"Image/v2_gx_hxx1.gif\";}");
            js.AddLine("}else playnum.innerHTML='0人评星';}");
            js.AddLine("}");
            #endregion
            js.AddLine("function createCookie(key,value)");
            js.AddLine("{");
            js.AddLine("var today=new Date();");
            js.AddLine("var expireDay=new Date();");
            js.AddLine("var expireTime=24*60*60*1000");//保存一天
            js.AddLine("expireDay.setTime(today.getTime()+expireTime);");
            js.AddLine("document.cookie=key+\"=\"+value+\";expires=\"+expireDay.toGMTString();");
            js.AddLine("}");
            return js.ToString();

        }

        private void GetPlayURLQuest()
        {
            playurl=HttpContext.Current.Request.Url.OriginalString;
            if (playurl.IndexOf('?') != -1)
            {
                playurl = playurl.Substring(playurl.IndexOf('?') + 1);
            }
            else
            {
                playurl = playurl.Substring(playurl.LastIndexOf('/')+1);
            }
        }
        private void Fimgbuding()
        {
            int starno;
            int fullstar = 0;
            int halfstarnum = 0;
            bool HalfImage = false;
            XmlDocument doc = null;
            switch (_selectDB)
            {
                case EnumDB.XMLDoc:       //XML文档模式
                    if (_xmldocpath == null || _xmldocpath == string.Empty)//如果未设置文档路径
                    {
                        _xmldocpath = "XMLDoc/star.xml";
                    }
                    if (RetingXMLDoc.IsFileExists(_xmldocpath))//判断文档是否存在如果不存在则创建
                    {
                        doc = RetingXMLDoc.AddRootNodeToXmlDoc(_xmldocpath, "root");
                        RetingXMLDoc.AddNode(doc, "root", playurl);
                        RetingXMLDoc.AddNode(doc, "root" + playurl, "desponst");
                    }
                    else
                    {
                        NameValueCollection namevalue = RetingXMLDoc.SelectLastNodeValue(_xmldocpath, "root/"+playurl);
                        if (namevalue != null && namevalue.Get("id") != null)
                        {
                            attachnum = int.Parse(namevalue.Get("id"));
                            RetingSettings se = new RetingSettings(int.Parse(namevalue.Get("TotalScore")), attachnum);
                            //if (se.ShowHalfImage)//是否有半星图片
                            //{
                            halfstarnum = se.ImageHalfnum;
                            fullstar = se.RroundValue;
                            HalfImage = se.ShowHalfImage;
                            //}
                        }
                    }
                    break;
                case EnumDB.SQLServer:

                    break;
                default:
                    break;
            }
            fimgList = new System.Collections.ArrayList();


            for (int j = 1; j <= fullstar; j++)
            {

                fimage = new Image();
                fimage.ID = "ss_starfull" + j.ToString();
                fimage.ImageUrl = "image\\v2_gx_hxx1.gif";
                fimgList.Add(fimage);
            }
            if (HalfImage)
            {

                fimage = new Image();
                fimage.ID = "ss_starhalf";
                fimage.ImageUrl = "image\\v2_gx_hxx3n" + halfstarnum.ToString() + ".gif";
                fimgList.Add(fimage);

            }
            if (HalfImage)
                starno = _starnum - fullstar - 1;
            else
                starno = _starnum - fullstar;
            for (int i = 1; i <= starno; i++)
            {
                fimage = new Image();
                fimage.ID = "ss_starno" + i.ToString();
                fimage.ImageUrl = "image\\v2_gx_hxx2.gif";
                fimgList.Add(fimage);
            }
        }
       

        #endregion

        
    }

   

   
}