Question

在我的应用程序中，我想将一些客户数据从Android应用程序发送到asp.net网站（c＃），所以请帮助我。

Answer 1

您需要在c＃端使用HTTP服务器并通过GET或POST方法或TCP服务器发送数据并通过套接字发送数据。使用HTTP与c＃，Web服务更容易。您可以使用

发送或获取数据

public HttpResponse doGet() throws ClientProtocolException, IOException {
    DefaultHttpClient httpClient = new DefaultHttpClient();
    HttpGet httpGet = new HttpGet("url with or without parameters");
    HttpResponse respose = httpClient.execute(httpGet);
    return respose;
}

或发布

public HttpResponse doPost() throws IOException, JSONException, ClientProtocolException {
    DefaultHttpClient httpClient = new DefaultHttpClient();
    HttpPost httpPost = new HttpPost("url with or without parameters");
    httpPost.setHeader("Accept", "application/json");
    httpPost.setHeader("Content-type", "application/json");
    StringEntity entity = new StringEntity(json);
    httpPost.setEntity(entity);
    HttpResponse response = httpClient.execute(httpPost);
    return response;
}

Answer 2

在您的网站中公开JSON端点。例如，如果您正在使用MVC：

    public ActionResult JSONDoSomething(string param)
    {
        return Json("your result here", JsonRequestBehavior.AllowGet);
    }

然后在客户端上使用它：

    String url = "http://yourhost/yourapp/JSONDoSomething?param=" + param;
    HttpClient httpclient = new DefaultHttpClient();  
    HttpGet request = new HttpGet(url);  

    BasicResponseHandler handler = new BasicResponseHandler();  

    String result = "Nothing";
    try {
        result = httpclient.execute(request, handler);
    } catch (ClientProtocolException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

Answer 3

我认为你应该试试这个Tutorial。而不是ASP.NET的PHP。逻辑是相同的

它的步骤很少。
A）Android代码

 ArrayList<NameValuePair> parms = new ArrayList<NameValuePair>();
 parms.add(new BasicNameValuePair("EmpID", EmpID));

 StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
 StrictMode.setThreadPolicy(policy);
 InputStream is = null;

 HttpClient httpclient = new DefaultHttpClient();
 HttpPost httppost = new HttpPost("http://www.xxxx/some.aspx");
 httppost.setEntity(new UrlEncodedFormEntity(parms));
 HttpResponse response = httpclient.execute(httppost);
 HttpEntity entity = response.getEntity();
 is = entity.getContent();

B）ASP.NET

 protected void Page_Load(object sender, EventArgs e)
{
    using (SqlConnection cn = new SqlConnection("Data Source=.;Initial Catalog=RnD;Persist Security Info=True;)) //change as needed
    {
        using (StreamReader sr = new StreamReader(Request.InputStream, Encoding.UTF8))
        {
            Response.ContentType = "text/plain";

            string UserID = Request.Form["EmpID"];
            //SQL CODE

            string c = "sql Code";
            try
            {
                SqlCommand cmd = new SqlCommand(c, cn);
                cn.Open();
                SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                List<Dictionary<string, object>> list = new List<Dictionary<string, object>>();
                while (rdr.Read())
                {
                    Dictionary<string, object> d = new Dictionary<string, object>(rdr.FieldCount);
                    for (int i = 0; i < rdr.FieldCount; i++)
                    {
                        d[rdr.GetName(i)] = rdr.GetValue(i);
                    }
                    list.Add(d);
                }
                JavaScriptSerializer j = new JavaScriptSerializer();
                Response.Write("{\"JSON\":");
                Response.Write(j.Serialize(list.ToArray()));
                Response.Write("}");


            }
            catch (Exception ex)
            {
                Response.TrySkipIisCustomErrors = true;
                Response.StatusCode = 500;
                Response.Write("Error occurred. Query=" + c + "\n");
                Response.Write(ex.ToString());

            }
            Response.End();
        }
    }
}

从Android应用程序发送数据到ASP.NET C＃

3 个答案: