C # Send an HttpPost request to call WebService,

C # Send an HttpPost request to call WebService,

I. Webservice call methods:

Webservice call 1: Enter the following URL in the browser, then enter parameters on the returned page, and submit the request for Implementation call.
Http: // localhost/WebService/MyService. asmx? Op = MyAction

Webservice call 2: html is called through form submission

<Form id = "form1" runat = "server" action = "http: // 10.15.223.56/WebService/MyService. asmx/MyAction "> <input type =" text "name =" strXml "value =" <a ObjID = \ "9 \"> </a> "/>
<Input type = "text" name = "strData" value = "ContactSign | 990011 | my data"/>
<Input type = "submit" value = "Send"/>
</Form>

Webservice call 3: Send an HttpPost request in C # To Call The MyAction method in WebService. The Code is as follows:

Void UpdateContactSign () {string ServerPage =" http://localhost/WebService/MyService.asmx "; Try {// ServerPage + = "? Op = TangramAction "; ServerPage + ="/MyAction "; // MyAction is the WebService method string strXml = "<a ObjID = \" 9 \ "> </a> ",; // The first parameter string strData = "ContactSign | 990011 | my data"; // The second parameter string res = HttpConnectToServer (ServerPage, strXml, strData); // MessageBox. show (res);} catch (Exception ex) {}} // send the message to the server public string HttpConnectToServer (string ServerPage, string strXml, string strData) {string postData = "strXml =" + strXml + "& strData =" + strData; byte [] dataArray = Encoding. default. getBytes (postData); // create a request HttpWebRequest request = (HttpWebRequest) HttpWebRequest. create (ServerPage); request. method = "POST"; request. contentLength = dataArray. length; request. contentType = "application/x-www-form-urlencoded"; // create input Stream dataStream = null; try {dataStream = request. getRequestStream ();} catch (Exception) {return null; // failed to connect to the server} // send the request dataStream. write (dataArray, 0, dataArray. length); dataStream. close (); // read the returned message string res = string. empty; try {HttpWebResponse response = (HttpWebResponse) request. getResponse (); StreamReader reader = new StreamReader (response. getResponseStream (), Encoding. UTF8); res = reader. readToEnd (); reader. close () ;}catch (Exception ex) {return null; // failed to connect to the server} return res ;}

 

Ii. garbled Chinese characters in the parameters of the HttpPost request sent in C:

1. client parameter Base64 encoding before assigning a value to postData, perform Base64 encoding on strData. Pay attention to replacing the plus sign ('+, otherwise, the Base64 string cannot be obtained because the plus sign is passed through the Url and becomes a space. The modification code is as follows:

// Send the message to the server public string HttpConnectToServer (string ServerPage, string strXml, string strData) {// Base64 Encoding processes Chinese garbled byte [] buffer = Encoding. default. getBytes (strData); string Base64StrData = Convert. toBase64String (buffer ). replace ("+", "% 2B"); // process the plus string postData = "strXml =" + strXml + "& strData =" + Base64StrData; byte [] dataArray = Encoding. default. getBytes (postData); // create a request
.......
...... Return res;
}

2. After the server obtains the data, it decodes the data before using it. The decoded code is as follows:

Public string MyAction (string strXml, string strData) {// Base64 decoded byte [] buffer = Convert. fromBase64String (strData); string Data = Encoding. default. getString (buffer); // The method is used in some codes. If strData is used, the decoded Data ......} is used ................}