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  • prototype 学习


       这段时间不是很忙的,终于有机会学习一下javascript,这块一直是我的弱项,得找个机会补习一下啊,
       通过两天的学习,有了个大体的认识,
       学习过程中可以参考 http://591wap.cn/works/prototype/index.html 
       对大家学习应该有帮助的,

              <input type="hidden" id="hidxml" runat="server" />  //xml 文件的地址
              <input type="button" value="GetHtml" onclick="GetXml()" />
              <div id="placeholder"></div>
               <textarea id="result" cols='60' rows='10' ></textarea> 
       <?xml version="1.0" encoding="utf-8"?>
    <Books>
          <Book>
                <Name>HTML Book</Name>
                <Author>Lee</Author>
          </Book>
          <Book>
                <Name>XML Book</Name>
                <Author>liu</Author>
          </Book>
    </Books>
           function showBooks(originalRequest)  //本来打算把返回的xml流转化为html 的table 的格式
        { 
                   var results = originalRequest.responseXML;
                    var table = document.createElement("table");        
                    var books = results.getElementsByTagName("Book");        
                     alert(books.length);            //    ---总是0           
                    for(var i = 0; i < books.length; i++) {
                        book = books[i];
                        var name = book.getElementsByTagName("Name")[0].firstChild.nodeValue;
                        var author = book.getElementsByTagName("Author")[0].firstChild.nodeValue;
                        var row = document.createElement("tr");
                        var cellname=document.createElement("td");
                        var cellauthor=document.createElement("td");
                        cellname.innerText = name;
                        cellauthor.innerText=author;
                       
                        row.appendChild(cellname);
                        row.appendChild(cellauthor);
                        table.appendChild(row);
                    }
               
                    var con=$("placeholder");

                    con.innerHTML = table.outerHTML;

        }
        function GetXml()
         {
             var url = './GetXml.ashx';
                   var pars = 'file='+$F("hidxml");

                   var myAjax = new Ajax.Request(
                        url,
                        {method: 'get', parameters: pars, onComplete: showBooks}
                        );
    //         var myAjax = new Ajax.Updater({success: 'placeholder'},url,{method: 'get',parameters: pars,onFailure: reportError});

             }
             function reportError()
               {
                alert('ERROR');
               }
               function Suecss()
                {
                 alert(" over");
                }
    ./GetXml.ashx 是为了生成xml文件的,具体如下
    [WebService(Namespace = "http://tempuri.org/")]
        [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
        public class GetXml : IHttpHandler {

            public void ProcessRequest(HttpContext context) {
             string fileName =   context.Request.QueryString["file"];
                context.Response.ContentType = "text/plain";
                context.Response.Write(CreateXmlDocument(fileName));
            }

            public bool IsReusable {
                get {
                    return false;
                }
            }
            private string CreateXmlDocument(string file) {

                string Result = string.Empty;
                XmlTextWriter writer = new XmlTextWriter(file, System.Text.Encoding.UTF8);
                writer.Formatting = Formatting.Indented;
                writer.Indentation = 6;
                writer.WriteStartDocument();
                writer.WriteStartElement("Books");
                GenerateClassXmlNode(writer);
                writer.WriteEndElement();
                 writer.WriteEndDocument();
                writer.Close();
                XmlDocument xdoc = new XmlDocument();
                xdoc.Load(file);
                return xdoc.OuterXml;
            }
            private  void GenerateClassXmlNode(XmlTextWriter writer) {
                writer.WriteStartElement("Book");
                writer.WriteElementString("Name", "HTML Book");
                writer.WriteElementString("Author", "Lee");
                writer.WriteEndElement();

                writer.WriteStartElement("Book");
                writer.WriteElementString("Name", "XML Book");
                writer.WriteElementString("Author", "liu");
                writer.WriteEndElement();
            }
       那位高手能解答一下啊,谢谢拉

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  • 原文地址:https://www.cnblogs.com/jfliuyun/p/682729.html
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