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Recommended usage of jquery $.getJSON combined with .NET

巴扎黑Original: 2017-07-03 09:40:09946browse

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

Handler.ashx

Code

<%@ WebHandler Language="C#" Class="Handler" %>

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

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



        context.Response.Clear();
        context.Response.ContentEncoding = Encoding.UTF8;
        context.Response.ContentType = "application/json";
        //Response.Write("{\"success\":true,\"name\":\"张三\",\"year\":\"2009-12-12\"}");
        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("name", dr["name"].ToString());
            jsonHelp.AddItem("avg", dr["avg"].ToString());

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

            jsonHelp.ItemOk();
        }

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

test.aspx

Code

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

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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