[android-developers] insert data from android to sql server though WCF web services

hi friends,

i am inserting data from my mobile to SQL Server using WCF web services.but Data is not inserting.So please help me any one.i wrote below code for that,check it is correct or not.it is giveing response code is 400.

thank you,

// POST request to <service>
        HttpPost request = new HttpPost(URL);
        request.setHeader("Accept", "application/json");
        request.setHeader("Content-type", "application/json");       
             
      
            /*@EmployeeID,@LeaveTypeID,@SessionID,@FromDate,@ToDate,@TotalDays,@Balance,
             * @IsApproved,@IsRejected,@IsExported*/
           
            // Build JSON string       
            JSONStringer insert = new JSONStringer()
                .object()
                    .key("insert")
                        .object()
                            .key("empid").value(emp_id)
                            .key("leavecode").value(code)
                            .key("sessionid").value(sesson_id)
                            .key("fromdate").value(fDate)
                            .key("todate").value(tDate)                                 
                            .key("totaldays").value(tdays)
                            .key("balance").value(balance)
                            .key("isapproved").value(isApproved)
                            .key("isrejected").value(isRejected)                              
                            .key("isexported").value(isExported)
                           
                        .endObject()
                    .endObject();
            StringEntity entity = new StringEntity(insert.toString());
           
            request.setEntity(entity);

            // Send request to WCF service
            DefaultHttpClient httpClient = new DefaultHttpClient();
            HttpResponse response = httpClient.execute(request);       
 
            Log.d("WebInvoke", "Saving : " +      response.getStatusLine().getStatusCode());
           
     

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