//electricity ID 
String eEBusinessID="test1617571"; 
//electricity encryption private key, provide express bird, didn't go to express bird registered http://www.kdniao.com/reg attention preservation, don't leak 
String appKey="b2-7252-439 - b - 554343 af42c8f2175 b4eb - 1". 
//request url 
String reqURL="http://sandboxapi.kdniao.com:8080/kdniaosandbox/gateway/exterfaceInvoke.json"; 
//request instructions 
String reqType="1002"; 
//2 - json 
String dataType="2"; 
//character encoding USES the utf-8 
String charset="utf-8"; 
//JSON string string 
String jsonStr=
"{" OrderCode \ ": " \ ", \ "ShipperCode " : \ "SF, ", \ "LogisticCode " : \ "118461988807 "} "; 
//for the MD5 encryption (jsonStr + APIKey) 
String md5Str=MD5 (jsonStr + apiKey, charset); 
//the md5Str Base64 encoding 
String base64Str=base64 (md5Str charset); 
//URL encoding (utf-8) 
String datasign=HttpUtility. UrlEncode (base64Str charset); 
//request message parameter 
String postStr="RequestType=reqType& EBusinessID=eEBusinessID& RequestData=https://bbs.csdn.net/topics/jsonStr 
& DataSign=datasign& DataType=DataType "; 
//communication protocol using Http Post request way return trajectory data 
The string post=SendPost (reqURL postStr); 
//to get to the post data is express birds return the complete message, and then write a parsing json method can access to the inside of the field information, 

///& lt; summary> 
///string MD5 encryption 
///& lt;/summary> 
///& lt; Param name="STR" & gt; To be encrypted string & lt;/param> 
///& lt; Param name="charset" & gt; Encoding & lt;/param> 
///& lt; Returns> Cipher & lt;/returns> 
Private string MD5 (string STR, string charset) 
{
Byte [] buffer=System. Text. Encoding. GetEncoding (charset). GetBytes (STR); 
Try 
{
System. Security. Cryptography. MD5CryptoServiceProvider check; 
Check=new System. Security. Cryptography. MD5CryptoServiceProvider (); 
Byte [] somme=check.Com puteHash (buffer); 
String ret=""; 
Foreach (byte a in somme) 
{
If (a & lt; 16) 
Ret +="0" + a.T oString (" X "); 
The else 
Ret +=a.T oString (" X "); 
}
Return ret. ToLower (); 
}
Catch 
{
Throw; 
}
}
///& lt; summary> 
///base64 encoding 
///& lt;/summary> 
///& lt; Param name="STR" & gt; The content & lt;/param> 
///& lt; Param name="charset" & gt; Encoding & lt;/param> 
///& lt; Returns>  
Private string base64 (string STR, string charset) 
{
Return the Convert. ToBase64String (System. Text. Encoding. GetEncoding (charset). GetBytes (STR)); 
}
///& lt; summary> 
///Post way to submit data, returns the page source code 
///& lt;/summary> 
///& lt; Param name="url" & gt; Send the request URL 
///& lt; Param name="postData" & gt; Request message parameter & lt;/param> 
///& lt; Returns> The response of the remote resource results & lt;/returns> 
Private string SendPost (url string, the string postData) 
{
string result=""; 
Byte [] byteData=https://bbs.csdn.net/topics/Encoding.GetEncoding (" utf-8 "). GetBytes (postData. The ToString ()); 
Try 
{
HttpWebRequest request=(HttpWebRequest) WebRequest. Create (url); 
Request. The ContentType="application/x - WWW - form - urlencoded"; 
Request.=Referer url; 
Request. Accept="*/*"; 
Request. The Timeout=30 * 1000; 
Request. UserAgent="Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; The.net CLR 2.0.50727; The.net CLR 3.0.04506.648; The.net CLR 3.0.4506.2152; The.net CLR 3.5.30729) "; 
Request. The Method="POST"; 
Request. ContentLength=byteData. Length; 
Stream, Stream=request. GetRequestStream (); 
Stream. Write (byteData, 0, byteData. Length); 
Stream. Flush (); 
stream.Close(); 
HttpWebResponse response=(HttpWebResponse) request. The method GetResponse (); 
Stream backStream=response. GetResponseStream (); 
StreamReader sr=new StreamReader (backStream, Encoding GetEncoding (" utf-8 ")); 
Result=sr. ReadToEnd (); 
sr.Close(); 
BackStream. Close (); 
The response. The Close (); 
Request. The Abort (); 
}
The catch (Exception ex) 
{
Result=ex. ToString (); 
}
return result; 
} 

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