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Recommended usage of jquery $.getJSON combined with .NET

Jul 03, 2017 am 09:40 AM

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Without further ado, let’s give the file first:

Handler.ashx

Code

&lt;%@ WebHandler Language=&quot;C#&quot; Class=&quot;Handler&quot; %&gt;

using System;
using System.Web;
using System.Data;
using System.Text;
public class Handler : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        /*context.Response.ContentType = &quot;text/plain&quot;;
        string data = &quot;[{name:\&quot;fan\&quot;,age:26},{name:\&quot;wang\&quot;,age:25}]&quot;;//构建的json数据
        context.Response.Write(data);*/

        DataSet ds = new DataSet();
        DataTable dt = new DataTable();
        dt.Columns.Add(&quot;name&quot;, typeof(string));
        dt.Columns.Add(&quot;year&quot;, typeof(string));
        dt.Columns.Add(&quot;avg&quot;, typeof(string));
        DataRow tr = dt.NewRow();
        tr[&quot;name&quot;] = &quot;张三&quot;;
        tr[&quot;year&quot;] = &quot;2005-02-02&quot;;
        tr[&quot;avg&quot;] = &quot;男&quot;;
        dt.Rows.Add(tr);
        //ds.Tables.Add(dt);
        DataRow tr2 = dt.NewRow();
        tr2[&quot;name&quot;] = &quot;李四&quot;;
        tr2[&quot;year&quot;] = &quot;2007-02-02&quot;;
        tr2[&quot;avg&quot;] = &quot;女&quot;;
        dt.Rows.Add(tr2);
        ds.Tables.Add(dt);



        context.Response.Clear();
        context.Response.ContentEncoding = Encoding.UTF8;
        context.Response.ContentType = &quot;application/json&quot;;
        //Response.Write(&quot;{\&quot;success\&quot;:true,\&quot;name\&quot;:\&quot;张三\&quot;,\&quot;year\&quot;:\&quot;2009-12-12\&quot;}&quot;);
        context.Response.Write(getJSON(ds));
        context.Response.Flush();
        context.Response.End();
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }
    private static string getJSON(DataSet ds)//这里调用了JSON帮助文件，jsonHelp.cs 就不放出源码了
    {
        Json.JSONHelper jsonHelp = new Json.JSONHelper();

        jsonHelp.success = true;
        //jsonHelp.totlalCount = getPrjListCount();
        jsonHelp.totlalCount = ds.Tables[0].Rows.Count;

        foreach (DataRow dr in ds.Tables[0].Rows)
        {
            jsonHelp.AddItem(&quot;name&quot;, dr[&quot;name&quot;].ToString());
            jsonHelp.AddItem(&quot;avg&quot;, dr[&quot;avg&quot;].ToString());

            if (dr[&quot;year&quot;] != DBNull.Value)
            {
                jsonHelp.AddItem(&quot;year&quot;, Convert.ToDateTime(dr[&quot;year&quot;]).ToString(&quot;yyyy/MM/dd&quot;));
            }
            else
            {
                jsonHelp.AddItem(&quot;year&quot;, string.Empty);
            }

            jsonHelp.ItemOk();
        }

        string strResult = jsonHelp.ToString();
        return strResult;
    }
}

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test.aspx

Code

 &lt;script src=&quot;js/jquery.js&quot; type=&quot;text/javascript&quot; language=&quot;javascript&quot;&gt;&lt;/script&gt;
    &lt;script type=&quot;text/javascript&quot;&gt;
        $(function(){
            $.getJSON(&quot;Handler.ashx&quot;,function(json){
            $.each(json.data,function(i){$(&#39;#content&#39;).append(&quot;姓名：&quot;+json.data[i].name+&quot;----性别：&quot;+json.data[i].avg+&quot;----时间：&quot;+json.data[i].year+&quot;&lt;br/&gt;&quot;);});
            });
        });
    &lt;/script&gt;
 
 
&lt;body&gt;
    &lt;form id=&quot;form1&quot; runat=&quot;server&quot;&gt;
    &lt;p id=&quot;content&quot;&gt;&lt;/p&gt;
    &lt;/form&gt;
&lt;/body&gt;

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The same applies to putting the contents of the Handler.ashx file into the ordinary aspx file page_load method

That is, $.getJSON("ssss.aspx"function(e){});

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