Json实现异步请求提交评论无需跳转其他页面

主要将代码粘贴，通过阅读代码理解其中的相关逻辑。

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内容：</p> <p> <input type="button" id="send" value="提交" /></p> </form> <div class="comment"> 已有<a href="https://www.jb51.cc/tag/pinglun/" target="_blank" class="keywords">评论</a>：</div> <div id="resText"> </div> </pre> </div> <p>js<a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>：</p> <div class="jb51code"> <pre class="brush:js;"> $("#send").click(function () { $.get("doSave.ashx",{<span style="white-space:pre"> </span> <span style="font-family: Arial,Helvetica,sans-serif;"> </span>//<a href="https://www.jb51.cc/tag/diaoyong/" target="_blank" class="keywords">调用</a>json<a href="https://www.jb51.cc/tag/chajian/" target="_blank" class="keywords">插件</a> u_name: $("#username1").val(),//json数据/值对化 u_cont: $("#content").val() },function (data) var uName = data.username; //注：此处的username与doSave.ashx中的dic.add("username",uname)中的username相对应的 var uCont = data.content; var txtHtml = "<div class='comment'><h6>" + uName + ":</h6><p class='para'>" + uCont + "</p></div>" $("#resText").html(txtHtml); //将返回的数据<a href="https://www.jb51.cc/tag/tianjia/" target="_blank" class="keywords">添加</a>到<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>上 },"json"); })</pre> </div> <p><a href="https://www.jb51.cc/tag/chajian/" target="_blank" class="keywords">插件</a><a href="https://www.jb51.cc/tag/daima/" target="_blank" class="keywords">代码</a>：</p> <div class="jb51code"> <pre class="brush:csharp;"> <%@ WebHandler Language="C#" Class="doSave" %> <p>using System;<br /> using System.Web; </p> <p>public class doSave : IHttpHandler<br /> { </p> <p>public void ProcessRequest(HttpContext context)<br /> { </p> <p>var dic = new System.Collections.Generic.Dictionary<string,object>(); //存储的集合<br /> string jsonStr = "{}"; //新建字符串jsonStr </p> <p>context.Response.ContentType = "text/json"; //定义返回的<a href="https://www.jb51.cc/tag/neirong/" target="_blank" class="keywords">内容</a>类型为json </p> <p>string uname = context.Request.QueryString[0]; //<a href="https://www.jb51.cc/tag/huoqu/" target="_blank" class="keywords">获取</a>请求参数中第一个参数，也可以直接使用uname </p> <p>string commet = context.Request.QueryString[1]; //定义字符串uname、commet为context请求<a href="https://www.jb51.cc/tag/chaxun/" target="_blank" class="keywords">查询</a>的字符串context.Request.Params["username"];QyertStrubg:<a href="https://www.jb51.cc/tag/chaxun/" target="_blank" class="keywords">查询</a>字符串 </p> <p>dic.Add("username",uname); //将字符串<a href="https://www.jb51.cc/tag/tianjia/" target="_blank" class="keywords">添加</a>到对象中 </p> <p>dic.Add("content",commet); </p> <p>jsonStr = Newtonsoft.Json.JsonConvert.SerializeObject(dic); //序列化集合为json字符串 </p> <p>context.Response.Write(jsonStr);<br /> } </p> <p>public bool IsReusable<br /> {<br /> get<br /> {<br /> return false;<br /> }<br /> } </p> <p>}</pre></p> </div> <p>此处<a href="https://www.jb51.cc/tag/xiaoguo/" target="_blank" class="keywords">效果</a>即为，在输入框中输入相关<a href="https://www.jb51.cc/tag/wenzi/" target="_blank" class="keywords">文字</a>，点击提交，下方会<a href="https://www.jb51.cc/tag/zidong/" target="_blank" class="keywords">自动</a>将书写的<a href="https://www.jb51.cc/tag/wenzi/" target="_blank" class="keywords">文字</a>进行展示，无需<a href="https://www.jb51.cc/tag/tiaozhuan/" target="_blank" class="keywords">跳转</a>其他<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>。</p><i class="glyphicon glyphicon-link"></i> 原文链接：https://www.f2er.com/js/57574.html</div> <div class="topcard-tags"><a href="https://www.f2er.com/tag/yibuqingqiu/" class="tag_link" target="_blank">异步请求</a></div> <ul class="list-group"> <li class="list-group-item"><a href="https://www.f2er.com/js/57575.html" title="innerHTML动态添加html代码和脚本兼容多个浏览器">上一篇：innerHTML动态添加html代码和脚本兼</a><a href="https://www.f2er.com/js/57573.html" title="5个JavaScript经典面试题" class="text-muted pull-right">下一篇：5个JavaScript经典面试题</a> </li> </ul> </div> </div> </div>  <div class="row row-sm"> <div class="col-sm-12 col-md-12 col-lg-12"> <div class="card"> <ins class="adsbygoogle" style="display:block" data-ad-format="autorelaxed" data-ad-client="ca-pub-4605373693034661" data-ad-slot="9144498553"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); 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