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<td height="40">您当前位置：<a href="">网站首页</a> >> <a href="article/list_107_1.html">网页制作</a> >> <a href="article/list_132_1.html">Javascript/Ajax</a> >> 阅读文章</td>
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<td align="center"><h1>最基本的AJAX框架的实现方法</h1>
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来源：Ok3w新闻发布系统 发布时间：2009-05-01 00:38:02 查看次数：<span id="News_Hits"></span><iframe style="display:none;" src="hits.asp?type=news&id=107"></iframe>
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<td style="word-break: break-all; word-wrap:break-word;"><div class="gray14">2． 客户端Javascript代码：</P><PRE><OL class=dp-c><LI class=alt><SPAN><SPAN class=keyword>function</SPAN><SPAN> CallMethod(AssemblyName,MethodName,Argus) </SPAN></SPAN><LI><SPAN>{ </SPAN><LI class=alt><SPAN> </SPAN><SPAN class=keyword>var</SPAN><SPAN> args = </SPAN><SPAN class=string>""</SPAN><SPAN>; </SPAN><LI><SPAN> </SPAN><SPAN class=keyword>for</SPAN><SPAN>(</SPAN><SPAN class=keyword>var</SPAN><SPAN> i=0;iargs += Argus[i] + </SPAN><SPAN class=string>","</SPAN><SPAN>; </SPAN><LI class=alt><SPAN class=keyword>if</SPAN><SPAN>(args.length>0) args = args.substr(0,args.length-1); </SPAN><LI><SPAN class=keyword>var</SPAN><SPAN> xmlhttp = </SPAN><SPAN class=keyword>new</SPAN><SPAN> ActiveXObject(</SPAN><SPAN class=string>'Microsoft.XMLHTTP'</SPAN><SPAN>); </SPAN><LI class=alt><SPAN>url = </SPAN><SPAN class=string>"AJAX/AJAX.czhenq?as="</SPAN><SPAN> + AssemblyName + </SPAN><SPAN class=string>"&me="</SPAN><SPAN> + MethodName +</SPAN><SPAN class=string>"&ar="</SPAN><SPAN>+ args; </SPAN><LI><SPAN>xmlhttp.open(</SPAN><SPAN class=string>"POST"</SPAN><SPAN>,url,</SPAN><SPAN class=keyword>false</SPAN><SPAN>); </SPAN><LI class=alt><SPAN>xmlhttp.send(); </SPAN><LI><SPAN>alert(xmlhttp.responseText); </SPAN><LI class=alt><SPAN>} </SPAN></LI></OL></PRE><P>3.一个简单的AJAX框架已经实现。现在写段代码来测试.<BR><BR><BR><BR></P><P><STRONG>使用自己的AJAX</STRONG></P><P>1.新建一个网站，并应用刚才你编写的HttpHandler。并在网站的Web.config中注册你的HttpHandler,说明那些请求将使用你编写的Handler来处理。下面的内容说明:所有以"czq"结尾的请求，都将使用"Czhenq.HttpHandlerFactory"来处理。</P><P>type="Czhenq.HttpHandlerFactory, Czhenq.AJAX"/></P><P>2.添加一个web页面，将刚才的脚本拷贝到页面中，并添加一个你要调用的方法。</P><PRE><OL class=dp-c><LI class=alt><SPAN><SPAN class=keyword>private</SPAN><SPAN> </SPAN><SPAN class=keyword>string</SPAN><SPAN> Add(</SPAN><SPAN class=keyword>int</SPAN><SPAN> i, </SPAN><SPAN class=keyword>int</SPAN><SPAN> j) </SPAN></SPAN><LI><SPAN>{ </SPAN><LI class=alt><SPAN> </SPAN><SPAN class=keyword>return</SPAN><SPAN> TextBox1.Text; </SPAN><LI><SPAN>} </SPAN></LI></OL></PRE><P>3.在页面中放置一个HiddenField控件，命名为AssemblyName。 并在Page_Load中添加如下代码：</P><PRE><OL class=dp-c><LI class=alt><SPAN><SPAN class=keyword>string</SPAN><SPAN> assemblyName = Czhenq.AJAX.Class1.Encode( </SPAN></SPAN><LI><SPAN> </SPAN><LI class=alt><SPAN class=keyword>typeof</SPAN><SPAN>(_Default).AssemblyQualifiedName); </SPAN><LI><SPAN>AssemblyName.Value = assemblyName; </SPAN></LI></OL></PRE><P>4.页面中添加如下脚本：</P><PRE><OL class=dp-c><LI class=alt><SPAN><SPAN class=keyword>var</SPAN><SPAN> assemblyName = document.getElementById(</SPAN><SPAN class=string>"AssemblyName"</SPAN><SPAN>); </SPAN></SPAN><LI><SPAN class=keyword>var</SPAN><SPAN> argus = </SPAN><SPAN class=keyword>new</SPAN><SPAN> Array(); </SPAN><LI class=alt><SPAN>argus.push(</SPAN><SPAN class=string>"100"</SPAN><SPAN>); </SPAN><LI><SPAN>argus.push(</SPAN><SPAN class=string>"200"</SPAN><SPAN>); </SPAN><LI class=alt><SPAN>CallMethod(assemblyName,</SPAN><SPAN class=string>"Add"</SPAN><SPAN>,argus); </SPAN></LI></OL></PRE><P><STRONG>总结 </STRONG>AJAX并不是一种新的技术,它只是一些已有技术的有机结合，我们可以将AJAX简单的理解为：AjAx是对JavaScript调用XmlHttp的封装，它改变的是代码书写方式。<BR><B>附</B> Encode 与 Dencode实现：</P><PRE><OL class=dp-cpp><LI class=alt><SPAN><SPAN class=keyword>public</SPAN><SPAN> </SPAN><SPAN class=keyword>static</SPAN><SPAN> string Encode(string value) </SPAN></SPAN><LI><SPAN>{ </SPAN><LI class=alt><SPAN> byte[] bytes = ASCIIEncoding.ASCII.GetBytes(value); </SPAN><LI><SPAN> </SPAN><SPAN class=keyword>return</SPAN><SPAN> Convert.ToBase64String(bytes); </SPAN><LI class=alt><SPAN>} </SPAN><LI><SPAN class=keyword>public</SPAN><SPAN> </SPAN><SPAN class=keyword>static</SPAN><SPAN> string Dencode(string value) </SPAN><LI class=alt><SPAN>{ </SPAN><LI><SPAN> byte[] bytes = Convert.FromBase64String(value); </SPAN><LI class=alt><SPAN> </SPAN><SPAN class=keyword>return</SPAN><SPAN> ASCIIEncoding.ASCII.GetString(bytes); </SPAN><LI><SPAN>} </SPAN></LI></OL></PRE></PRE><div class="thisPageNav"><a href="article/107.html">第1页</a> <a href="article/107_2.html"><strong>第2页</strong></a> </div></div></td>
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