ASP.NET前台table通過Ajax獲取綁定后台查詢的json數據

上一篇《ASP.NET前台html頁面AJAX提交數據后台ashx頁面接收數據》寫了前台提交數據后台保存到數據庫，數據處理以后用戶肯定要查詢。接下來就寫一個前台table通過ajax  Json 獲取值。下面是要實現的效果

 

 每次寫博客我都是以一個初學者來看的態度去寫，語文也不用合格所有寫的有點凌亂。大家看得懂就行，不明白的留言。

1、先來看看前台html頁面    查詢出來的結果是拼接table上去的

        <div class="yjcxdiv">
            <p class="cxancss">
                <span>登記人電話：</span><input class="txtwenben" type="number" maxlength="11" id="txtphone" name="txtanme" placeholder="請輸入完整的11位電話號碼" />
                <button class="btncxan" id="btnchaxun" name="btnchaxun">查詢</button>
            </p>
            <div class="yjdjlist">
                <table id="tttab">
                    <tr id="yjdjtrone">
                        <td id="yyxh">序號</td>
                        <td id="yyname">儀檢名稱</td>
                        <td id="yyxh">規格型號</td>
                        <td id="yybh">出廠編號</td>
                        <td id="yydate">登記日期</td>
                        <td id="yyperson">登&nbsp;記&nbsp;&nbsp;人</td>
                        <td id="yyphone">聯系電話</td>
                        <td id="yystate" style="color:red; font-size:14px;font-weight:600;">審核狀態</td>
                    </tr>
                </table>
            </div>
        </div>

 

 2、記得添加jQuery文件，下面是js，  樣式的話自己去調節咯

<script type="text/javascript">
        $(document).ready(function () {
            $("#btnchaxun").click(function () {//插敘按鈕的單擊事件
                var item = "";//定義拼接table字符串
                $("#tttab tr").remove();//這里是為了第二次查詢前面插敘的數據清空
                $("#tttab").append("<tr id='yjdjtrone'><td id='yyxh'>序號</td><td id='yyname'>儀檢名稱</td><td id='yyxh'>規格型號</td><td id='yybh'>出廠編號</td><td id='yydate'>登記日期</td><td id='yyperson'>登&nbsp;記&nbsp;&nbsp;人</td><td id='yyphone'>聯系電話</td><td id='yystate' style='color:red; font-size:14px;font-weight:600;'>審核狀態</td></tr>");
　　　　　　　　　　//拼接表格頭
                var _sqltj = $("#txtphone").val();//獲取查詢條件等下作為參數提交到后台
                $.ajax({
                    type: "post",
                    url: "{config.webpath}tools/instrumentlookup_ajax.ashx",//這個提交的路徑記住是一個ashx的頁面  不是aspx頁面
                    data: { sqltj: _sqltj },//傳的參數
                    success: function (tt) {//成功的函數  里面的tt就是執行成功返回來的string  為什么說是string類型呢  等下到后台再看
                        var data = JSON.parse(tt);把傳過來的字符串轉化為一個對象 json
                        alert(tt);//這個是測試的
                        $.each(data, function (i, s) {//循環賦值到table中
                            item = "<tr><td>" + (i + 1) + "</td><td>" + s['Name'] + "</td> <td>" + s['Modle'] + "</td> <td>" + s['Number'] + "</td><td>" + s['ADDTIME'] + "</td><td>" + s['Person'] + "</td><td>" + s['Phone'] + "</td><td>" + s['Status'] + "</td></tr>"
                            $("#tttab").append(item);//拼接表格
                        })
                    },
                    error: function () {
                        alert("程序異常！查詢出錯"); return;
                    }
                });
            });
        });
    </script>

 

大家可能疑惑ajax為啥沒有指定dataType是json  我試過 那是不對的  因為后台處理后不是json傳過來的

3、從后台數據庫獲取數據，我用的是原始的方法網站這里只需要查詢這一點就不弄那么麻煩了

     
using System.Data;
using System.Configuration;
using System.Data.SqlClient;
using Newtonsoft.Json;
//這是添加的命名空間
  public void ProcessRequest(HttpContext context)
        {
            var tj =HttpContext.Current.Request["sqltj"];//接收過來的查詢條件參數
            string _sql = string.Format(@"select Name,Modle,Number,CONVERT(varchar(100),AddTime,23) AS ADDTIME,Person,Phone,(case Status when '0' then '未審核' when '1' then '通過審核'  else '其他' end) AS Status from InstrumentCheck where Phone ='{0}'", tj.ToString()); ;
            context.Response.ContentType = "text/plain";
            SqlConnection conn = new SqlConnection();
            conn.ConnectionString = connectionStringgg;
            if(conn.State==ConnectionState.Closed)
            {
                conn.Open();
            }
            SqlCommand cmd = new SqlCommand();
            cmd.CommandText = _sql;
            cmd.Connection=conn;
            SqlDataAdapter sda = new SqlDataAdapter();
            sda.SelectCommand = cmd;
            DataSet ds = new DataSet();
            sda.Fill(ds);    
            context.Response.Write(JsonConvert.SerializeObject( ds.Tables[0]));
        }

 

 后台這里記得一定要寫在ProcessRequest(HttpContext context)這個方法里，你可以自己寫一個方法在通過自己的處理到你寫的方法里（我試過很麻煩的） 調用的路徑他只會找到ProcessRequest(HttpContext context)這個方法所以寫在里面就可以啦！這里要添加一個Json的處理dll文件Newtonsoft.Json.dl下載（需要的朋友單擊鏈接下載）然后在程序集添加。

鼠標放在JsonConvert.SerializeObject( ds.Tables[0])這個方法上看你會發現它string類型的

 我把字符串復制出來

[{"Name":"蘋果手機","Modle":"XM0012","Number":"REQU7986","ADDTIME":"2017-08-01","Person":"魏楊 ","Phone":"17687007837","Status":"未審核"},
{"Name":"一二三四五","Modle":"上山打老虎","Number":"老虎不在家","ADDTIME":"2017-08-01","Person":"秦始皇 ","Phone":"17687007837","Status":"通過審核"},
{"Name":"抽水機","Modle":"CH54353","Number":"KJHGF956","ADDTIME":"2017-08-01","Person":"唐太宗 ","Phone":"17687007837","Status":"未審核"},
{"Name":"打火機","Modle":"YY789","Number":"89+KGF","ADDTIME":"2017-08-01","Person":"朱元璋 ","Phone":"17687007837","Status":"未審核"},
{"Name":"平板電腦","Modle":"YY900","Number":"136689","ADDTIME":"2017-08-01","Person":"趙匡胤 ","Phone":"17687007837","Status":"通過審核"},
{"Name":"鼠標","Modle":"99","Number":"99","ADDTIME":"2017-08-01","Person":"李白 ","Phone":"17687007837","Status":"通過審核"},
{"Name":"自行車","Modle":"HK330","Number":"兒童與愛哦","ADDTIME":"2017-08-01","Person":"杜甫 ","Phone":"17687007837","Status":"未審核"},
{"Name":"藍牙耳機","Modle":"YC897978","Number":"11","ADDTIME":"2017-08-01","Person":"岑參 ","Phone":"17687007837","Status":"通過審核"},
{"Name":"機械鍵盤","Modle":"JDVKSL","Number":"uyuyyu","ADDTIME":"2017-08-01","Person":"曹操 ","Phone":"17687007837","Status":"未審核"},
{"Name":"終結者輪胎","Modle":"FRGGT8899","Number":";","ADDTIME":"2017-08-01","Person":"張飛 ","Phone":"17687007837","Status":"通過審核"},
{"Name":"野生雞樅","Modle":"76HHNH","Number":"","ADDTIME":"2017-08-01","Person":"劉備 ","Phone":"17687007837","Status":"通過審核"},
{"Name":"白菜","Modle":"456","Number":"45","ADDTIME":"2017-08-01","Person":"宋江 ","Phone":"17687007837","Status":"未審核"},
{"Name":"青菜","Modle":"CGJH","Number":"DFGHJK","ADDTIME":"2017-08-02","Person":"maozedong ","Phone":"17687007837","Status":"通過審核"},
{"Name":"柴油機","Modle":"X300","Number":"1314669","ADDTIME":"2017-08-02","Person":"魏楊楊 ","Phone":"17687007837","Status":"通過審核"}]

 

這個就是context.Response.Write(JsonConvert.SerializeObject( ds.Tables[0])) 的 內容，很有意思看着是json 實際上卻是string類型的。所以js里面 var data = JSON.parse(tt);把傳過來的字符串轉化為一個對象 json這一步不能少，我就在這里糾結了1天，用eval（）方法還是沒有達到效果。