1. ashx程式碼

publicvoid ProcessRequest(HttpContext context)

{

context.Response.ContentType = "text/plain";

string appkey ="";//配置您申請的appkey

//1.常用快遞查詢API

string url1 ="http://v.juhe.cn/exp/index";

var parameters1 =newDictionary<string,string>();

parameters1.Add("com","");//需要查詢的快遞公司編號

parameters1.Add(

"no","");//需要查詢的訂單號

parameters1.Add("key", appkey);//你申請的key

parameters1.Add("dtype","json");//返回資料的格式,xml或json，預設json

string result1 = sendPost(url1,parameters1,"get");

JsonObject newObj1 =newJsonObject(result1);

String errorCode1 =newObj1["error_code"].Value;

if (errorCode1 =="0")

{

context.Response.Write(newObj1);

return;

}

else

{

Console.WriteLine(newObj1["error_code"].Value + ":" + newObj1["reason"].Value);

}

}

publicbool IsReusable

{

get

{

returnfalse;

}

}

///<summary>

/// Http (GET/POST)

///</summary>

///<param name="url">請求URL</param>

///<param name="parameters">請求引數

</param>

///<param name="method">請求方法</param>

///<returns>響應內容</returns>

staticstring sendPost(string url, IDictionary<string,string> parameters,string method)

{

if (method.ToLower()=="post")

{

HttpWebRequest req =null;

HttpWebResponse rsp =null;

System.IO.Stream reqStream =null;

try

{

req = (HttpWebRequest)WebRequest.Create(url);

req.Method = method;

req.KeepAlive = false;

req.ProtocolVersion = HttpVersion.Version10;

req.Timeout = 5000;

req.ContentType = "application/x-www-form-urlencoded;charset=utf-8";

byte[] postData =Encoding.UTF8.GetBytes(BuildQuery(parameters,"utf8"));

reqStream =req.GetRequestStream();

reqStream.Write(postData,0, postData.Length);

rsp = (HttpWebResponse)req.GetResponse();

Encoding encoding =Encoding.GetEncoding(rsp.CharacterSet);

returnGetResponseAsString(rsp, encoding);

}

catch (Exception ex)

{

return ex.Message;

}

finally

{

if (reqStream !=null) reqStream.Close();

if (rsp !=null) rsp.Close();

}

}

else

{

//建立請求

HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url + "?" +BuildQuery(parameters,"utf8"));

//GET請求

request.Method = "GET";

request.ReadWriteTimeout =5000;

request.ContentType = "text/html;charset=UTF-8";

HttpWebResponse response = (HttpWebResponse)request.GetResponse();

Stream myResponseStream =response.GetResponseStream();

StreamReader myStreamReader =newStreamReader(myResponseStream,Encoding.GetEncoding("utf-8"));

//返回內容

string retString =myStreamReader.ReadToEnd();

return retString;

}

}

///<summary>

///組裝普通文字請求引數。

///</summary>

///<param name="parameters">Key-Value形式請求引數字典</param>

///<returns>URL編碼後的請求資料</returns>

staticstring BuildQuery(IDictionary<string,string> parameters,string encode)

{

StringBuilder postData =newStringBuilder();

bool hasParam =false;

IEnumerator<KeyValuePair<string,string>> dem =parameters.GetEnumerator();

while (dem.MoveNext())

{

string name =dem.Current.Key;

string value =dem.Current.Value;

//忽略引數名或引數值為空的引數

if (!string.IsNullOrEmpty(name))//&& !string.IsNullOrEmpty(value)

{

if (hasParam)

{

postData.Append("&");

}

postData.Append(name);

postData.Append("=");

if (encode =="gb2312")

{

postData.Append(HttpUtility.UrlEncode(value,Encoding.GetEncoding("gb2312")));

}

elseif (encode =="utf8")

{

postData.Append(HttpUtility.UrlEncode(value,Encoding.UTF8));

}

else

{

postData.Append(value);

}

hasParam = true;

}

}

returnpostData.ToString();

}

///<summary>

///把響應流轉換為文字。

///</summary>

///<param name="rsp">響應流物件</param>

///<param name="encoding">編碼方式</param>

///<returns>響應文字</returns>

staticstring GetResponseAsString(HttpWebResponse rsp, Encoding encoding)

{

System.IO.Stream stream =null;

StreamReader reader =null;

try

{

//以字元流的方式讀取HTTP響應

stream =rsp.GetResponseStream();

reader = newStreamReader(stream, encoding);

return reader.ReadToEnd();

}

finally

{

//釋放資源

if (reader !=null) reader.Close();

if (stream !=null) stream.Close();

if (rsp !=null) rsp.Close();

}

}

2.前臺程式碼

<script>

$(function () {

$.ajax({

type: 'post',

url: '/GetExpress.ashx',

data: "{ }",

success: function (data) {

alert(0);

alert(data);

alert(eval("(" + data +")").reason);

alert(eval("(" + data +")").result.company);

var obj = eval("(" + data + ")").result.list;

//迴圈輸出物流資訊

for(var key in obj)

{

alert(obj[key].remark);

}

},

error: function (XMLHttpRequest,textStatus, errorThrown) {

alert(1);

alert(XMLHttpRequest.status);

alert(XMLHttpRequest.readyState);

alert(textStatus);

}

});

})

</script>

3.常見問題

XMLHttpRequest.status=200 (正常響應)
XMLHttpRequest.readyState=4 (正常接收)
ajax也會提示一個parseerror的錯誤.

可能的原因是返回的資料格式與你ajax中寫的資料格式不一致，返回的是text格式，而你寫的是json格式

JQuery將文字轉化成JSON物件需要注意的問題

在JQuery的許多方法中，很多方法的引數可以傳入一個JSON物件，比如Ajax方法的第二個引數。怎麼將文字轉化成JSON物件，需要注意以下問題

varcpro_id="u2261530";(window["cproStyleApi"] =window["cproStyleApi"] ||{})[cpro_id]={at:"3",rsi0:"680",rsi1:"200",pat:"6",tn:"baiduCustNativeAD",rss1:"#FFFFFF",conBW:"1",adp:"1",ptt:"0",titFF:"%E5%BE%AE%E8%BD%AF%E9%9B%85%E9%BB%91",titFS:"14",rss2:"#000000",titSU:"0",ptbg:"90",piw:"0",pih:"0",ptp:"0"}

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