Saturday, May 26, 2012

Access C# .net Web service in Android(simple one for Beginners)

  •  First of all I will tell you how to create web service(SQL database)  in Visual Studio with in 5 steps
Step 1           
     File--->web Site(click)  --->ASP .Net web Service     

  



Step 2 : Create a Table
           If Server Explorer is not appear ,then press ctrl + alt + s.Then add your data connection according to
your database.
           Then add new table to your database.











create your table


Save your table with table name


   enter some sample data



Step 3 : add a new class call connectionManager
 




give a class name :- ConnectionManager.Class



click "Yes" button
Double Click Your connectionManager.Class class @ solution Explore .Then type this code

//----------------------------------------
using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;


public class ConnectionManager
{
  


    public static SqlConnection NewCon;
    public static string ConStr = 

"Data Source=ADRIAN-PC\\SQLEXPRESS;Initial Catalog=SimpleLife;Integrated Security=True";

    public static SqlConnection GetConnection()
    {
        NewCon = new SqlConnection(ConStr);
        return NewCon;
    }

}

//------------------------------------------------------------------------

in here you have to change your  ConStr according to your database connection






Step 4 : add a new web method


                                                                Double click Service.cs
Double click Service.cs -->Then type  following code(copy & paste)

//----------------------------------------------------
using System;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Data;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]

public class Service : System.Web.Services.WebService
{
    public Service () {

       
    }

    [WebMethod]
    public string findContact(string eid) {

       return getContact(eid);
    }


    public String getContact(String eid)
    {

        SqlConnection conn;
        conn = ConnectionManager.GetConnection();
        conn.Open();
     
        SqlCommand newCmd = conn.CreateCommand();
     
        newCmd.CommandType = CommandType.Text;
        newCmd.CommandText = "select Name from dbo.StudentContact where studentNo='" + eid + "'";
        SqlDataReader sdr = newCmd.ExecuteReader();
        String address=null;
        if (sdr.Read())
        {
            address = sdr.GetValue(0).ToString();
        }
   
        conn.Close();
        return address;
       

    }

}
//------------------------------------------------------

Step 5 : Run your web service


This your web service

Now you can see your findContact( ) WEB METHOD will appear on webs service
Now we can check this web service is work correctly, there for click findContact(light blue color) on web service.
 type student no according to your insert data to the table.


now this web service is work properly. according to the student no it will appear student name.




  • Now I will tell you how to access this web service in Android


Step 1 : create your android project and create this main XML file

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="Type Student no"
    android:id="@+id/editText1">                          
    </EditText>
   
    <Button
    android:text="Get Name"
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
    </Button>
   
    <TextView
    android:text="from Web service"
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
    </TextView>
   
</LinearLayout>

Step 2 : Download (http://sourceforge.net/projects/ksoap2/) KSOAP from the internet and locate on your hard disk.And add to the to your Android Project















Step 3 :Then Type following code in main activity .java class (according to your Main Activity class(.java) )which class you decide to display data.


package com.webservice;             //In Here Your
package com."    your one     ";
import org.ksoap2.SoapEnvelope;
import org.ksoap2.serialization.PropertyInfo;
import org.ksoap2.serialization.SoapObject;
import org.ksoap2.serialization.SoapSerializationEnvelope;
import org.ksoap2.transport.HttpTransportSE;



import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Main extends Activity
{
    /** Called when the activity is first created. */
    private static final String SOAP_ACTION = "http://tempuri.org/findContact";
   
    private static final String OPERATION_NAME = "findContact";// your webservice web method name
   
    private static final String WSDL_TARGET_NAMESPACE = "http://tempuri.org/";
   
    private static final String SOAP_ADDRESS = "http://10.0.2.2:1506/WebSite3/Service.asmx";
// for the SOAP_ADDRESS, run your web service & see 
//your web service Url :1506/WebSite3/Service.asmx ,1052 will be change according to your PC

    TextView tvData1;
    EditText edata;
    Button button;
    String studentNo;
//http://localhost:1827/WebSite1/Service.asmx/HelloWorld
  
    //http://10.0.2.2:1827/WebSite1/Service.asmx
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        tvData1 = (TextView)findViewById(R.id.textView1);
      
       
        button=(Button)findViewById(R.id.button1);
       
        button.setOnClickListener(new OnClickListener() {
           
            public void onClick(View v) {
                  SoapObject request = new SoapObject(WSDL_TARGET_NAMESPACE,     OPERATION_NAME);
                    PropertyInfo propertyInfo = new PropertyInfo();
                    propertyInfo.type = PropertyInfo.STRING_CLASS;
                    propertyInfo.name = "eid";
                   
                    edata =(EditText)findViewById(R.id.editText1);
                    studentNo=edata.getText().toString();
                   
                    request.addProperty(propertyInfo, studentNo);
                           
                            SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                            SoapEnvelope.VER11);
                            envelope.dotNet = true;
                           
                            envelope.setOutputSoapObject(request);
                           
                            HttpTransportSE httpTransport = new HttpTransportSE(SOAP_ADDRESS);
                           
                            try  {                   
                            httpTransport.call(SOAP_ACTION, envelope);                   
                            Object response = envelope.getResponse();                   
                            tvData1.setText(response.toString());                   
                            }  catch (Exception exception)   {
                                          tvData1.setText(exception.toString()+"  Or enter number is not Available!");                   
                            }
                   
                    tvData1 = (TextView)findViewById(R.id.textView1);
               
            }
        });
       
                 
        //client = new DefaultHttpClient();           
        //new Read().execute("text");
 }
}

Step 4 : Add User Permission to Manifest
   
          " Internet User Permission "

Step 5 : Run your App

type Student No then click the button
 




Good Luck!











350 comments:

  1. I have downloaded the ksoap2 file from the link you have provided but it does not contain a jar file......So that it give me a class not found exception when i run the app.....
    " java.lang.NoClassDefFoundError: org.ksoap2.serialization.SoapObject"

    ReplyDelete
    Replies
    1. sorry Bro....
      Try this link....

      http://www.4shared.com/file/uOhx5aoj/ksoap2-android-assembly-24-jar.html

      if this one is not working ......PLZ send your Email address ...
      my email address : dhanushkaadrian12@gmail.com
      I will send ksoap2.jar
      good luck!

      Delete
    2. hi guys....can u help...

      I am trying to develop ASP.NET web application and also Android UI for the same application. I am new to android. I developed a simple screen that has a 2buttons and texview. Type something and clicking the button, saves theBooking datas in the dot.net database.and another one is clicking the button view Booking details...

      Delete
  2. Hey can you tell me how you got the SOAP address as?
    private static final String SOAP_ADDRESS = "http://10.0.2.2:1506/WebSite3/Service.asmx"

    When I run the web service the URL is:
    http://localhost:64987/WebSite1/Service.asmx

    How did you get http://10.0.2.2:1506/WebSite3/Service.asmx??

    ReplyDelete
    Replies
    1. hey brother sorry for the late comment...(due to the exam)
      consider about your Url
      http://localhost:64987/WebSite1/Service.asmx

      we have to add 10.0.2.2 to your Url
      because we have to access Local host from the Android Emulator..

      now you have to change your Url like this
      http://10.0.2.2:64987/WebSite1/Service.asmx

      for more details check this blogs:-
      http://saigeethamn.blogspot.com/2011/11/localhost-access-in-android-emulator.html

      good Luck!

      Delete
    2. its by default url to run webservice locally on your computer bro!!!used it http://10.0.2.2:64987/WebSite1/Service.asmx

      Delete
    3. I have used 10.0.2.2 with the tailing port number 58497 of my pc. But getting java.net.ConnectException: failed to connect to /127.0.0.1 (port 58497): connect failed: ECONNREFUSED (Connection refused) error. What's wrong with my URL? Any help..pls..

      Delete
  3. This comment has been removed by the author.

    ReplyDelete
    Replies
    1. am gettting error like this
      java.lang.NoClassDefFoundError: org.ksoap2.serialization.SoapObject
      in android
      what i have to do
      pls answer me

      Delete
  4. Hi thanks for the tutorial it was a grate help , I am trying to receive multiple Strings from the web service any way to do that , thanks again.

    ReplyDelete
    Replies
    1. Change your sql statement like this

      public String getReason1(string s)
      {
      conn.Open();
      SqlCommand newCmd = conn.CreateCommand();
      //newCmd.Connection = conn;
      newCmd.CommandType = CommandType.Text;
      newCmd.CommandText = "BookTitle from dbo.Book where BookCategory='" + s + "'";
      SqlDataReader sdr = newCmd.ExecuteReader();
      String myData = null;
      while (sdr.Read())
      {
      myData = myData + sdr["BookTitle"] + " , ";


      }
      conn.Close();
      return myData;

      }
      // in here you can take all book title in table with “,” …
      // like this:- science,Biology,History,
      //then you can split this book title and take it in to Array in android

      String str2array;// put web service values in to this string ,

      String[] arr=str2array.split(","); // in android

      Delete
  5. how to retrieve multiple value from a .net web service using soap.......and then howto display that data value in spinner ...is it possibe? any one help me....thanks in advance

    ReplyDelete
    Replies
    1. Change your sql statement like this

      public String getReason1(string s)
      {
      conn.Open();
      SqlCommand newCmd = conn.CreateCommand();
      //newCmd.Connection = conn;
      newCmd.CommandType = CommandType.Text;
      newCmd.CommandText = "BookTitle from dbo.Book where BookCategory='" + s + "'";
      SqlDataReader sdr = newCmd.ExecuteReader();
      String myData = null;
      while (sdr.Read())
      {
      myData = myData + sdr["BookTitle"] + " , ";


      }
      conn.Close();
      return myData;

      }
      // in here you can take all book title in table with “,” …
      // like this:- science,Biology,History,
      //then you can split this book title and take it in to Array in android

      String str2array;// put web service values in to this string ,

      String[] arr=str2array.split(","); // in android

      //By using this array you can add this items to list view or ....

      Delete
  6. can you please..put a Web Service REST Tutorial...please!!

    ReplyDelete
  7. The method addProperty(PropertyInfo, Object) from the type SoapObject is deprecated

    warning on line request.addProperty(...)

    ReplyDelete
  8. I am getting the error.
    the name ' connection manager ' does not exist in the current context
    how to resolve this problem.

    ReplyDelete
  9. now I am getting the error.
    Cannot open database "logindb" requested by the login. The login failed.
    Login failed for user 'CISLIVE3\dilwar'.

    ReplyDelete
  10. anybody know how to solve this error.
    java.lang.NullPointerException
    please help me as soon as possible

    ReplyDelete
    Replies
    1. did u fix that error
      i'm also having the same problem

      Delete
    2. you should use asynctask for network operation
      And by the way you wil get many other exceptions like networkOnMainThread..

      Delete
  11. I've tried your coding but when I tried of Android apps can not display data from its web? diandroid applications directly out

    ReplyDelete
    Replies
    1. have you added android internet permission??

      Delete
  12. Hi:),I'm getting this error
    "android java.net.sockettimeoutexception to connect to 10.0.2.2:55980/LocalSite/Service.asmx"..is there anything I can do,oh and btw great tutorial:)

    ReplyDelete
  13. I forgat to say that this only happens when testing on my device.In emulator it works

    ReplyDelete
  14. I am getting an error when i am entering the StudentNo... the error is "UNFORUNATLY THE APP IS STOP".

    please can anyone help me out

    ReplyDelete
  15. how it would be with two parameters

    ReplyDelete
    Replies
    1. Change your sql statement like this

      public String getReason1(string s)
      {
      conn.Open();
      SqlCommand newCmd = conn.CreateCommand();
      //newCmd.Connection = conn;
      newCmd.CommandType = CommandType.Text;
      newCmd.CommandText = "BookTitle from dbo.Book where BookCategory='" + s + "'";
      SqlDataReader sdr = newCmd.ExecuteReader();
      String myData = null;
      while (sdr.Read())
      {
      myData = myData + sdr["BookTitle"] + " , ";


      }
      conn.Close();
      return myData;

      }
      // in here you can take all book title in table with “,” …
      // like this:- science,Biology,History,
      //then you can split this book title and take it in to Array in android

      String str2array;// put web service values in to this string ,

      String[] arr=str2array.split(","); // in android

      Delete
  16. i am getting error in android while running
    error :no class deffounderror:org.koasp2.serialization.soapobject at com.example.network.mainactivity$1.onClick(MainAtivity.java:41)

    ReplyDelete
  17. I am getting an error of not getting connected to server or instance does
    not appear. Help me out

    ReplyDelete
  18. how can I publish apk with jar file to actual device ?

    ReplyDelete
  19. This blog offers the c#.Net services in mobile applications..
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  22. Dude I usually do not comment on posts, but this one is fucking good, thank you, after 2 days and 2 nights looking for something about how to consume the web service .net from android, I found this post which solved my problems in 20 minutes! thank you very much!

    ReplyDelete
  23. Hai,
    First of all thank you so much for the post.
    I have faced one error while programming the error is like this.
    android.Os.NetworkOnMainThreadException
    am not able to trace it can anybody help me??

    ReplyDelete
    Replies
    1. you should use asynctask for network operation.

      Delete
    2. how do you use asynctask it?

      Delete
  24. First of ALL Thank u so much for u
    im getting error like java.lang.null pointer exception
    could u please resolve this
    please help

    ReplyDelete
    Replies
    1. hey palani......
      call the web service from async task....
      your problm will be solved.....
      if not let me know......
      happy coding :)

      Delete
    2. can you write the code for async task please

      Delete
  25. Hello sir,I did whole code as it is .I did .net web service.But still i am facing problem with accessing data in android .
    On click of button following error is occurred ....

    06-26 05:59:35.346: E/AndroidRuntime(3958): FATAL EXCEPTION: main
    06-26 05:59:35.346: E/AndroidRuntime(3958): Process: com.example.ksoap, PID: 3958
    06-26 05:59:35.346: E/AndroidRuntime(3958): java.lang.NoClassDefFoundError: org.ksoap2.serialization.SoapObject
    06-26 05:59:35.346: E/AndroidRuntime(3958): at com.example.ksoap.MainActivity$1.onClick(MainActivity.java:53)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at android.view.View.performClick(View.java:4424)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at android.view.View$PerformClick.run(View.java:18383)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at android.os.Handler.handleCallback(Handler.java:733)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at android.os.Handler.dispatchMessage(Handler.java:95)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at android.os.Looper.loop(Looper.java:137)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at android.app.ActivityThread.main(ActivityThread.java:4998)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at java.lang.reflect.Method.invokeNative(Native Method)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at java.lang.reflect.Method.invoke(Method.java:515)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593)
    06-26 05:59:35.346: E/AndroidRuntime(3958): at dalvik.system.NativeStart.main(Native Method)

    please help me solve this problem .

    ReplyDelete
  26. can pls anyone tell me how to change this ConStr

    public static string ConStr =
    "Data Source=ADRIAN-PC\\SQLEXPRESS;Initial Catalog=SimpleLife;Integrated Security=True";

    ReplyDelete
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  29. This comment has been removed by the author.

    ReplyDelete
  30. android.os.NetworkOnMainThreadException on execute

    ReplyDelete
  31. i dont see "add new table" (2. process)

    ReplyDelete
  32. How can i Insert into the webservice database from android

    ReplyDelete
  33. i need help...i created web service (wcf, json return, framework 4.0) on visual studio 2012 and publish it in iis and run it on url (ip address)...in browser, but when i call it on android mobile then nothing return...

    ReplyDelete
    Replies
    1. how would done json in asp.net webservice?

      Delete
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  36. The app crashes every time while i use the "GET Name" button....am i missing smthng ??....

    ReplyDelete
  37. if need the code for login can u send to me by mail or publish online my mail is :: ibrahim.miari26@gmail.com

    ReplyDelete
  38. Wonderful blog & good post.Its really helpful for me, awaiting for more new post. Keep Blogging!

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    ReplyDelete
  39. getting Exception

    org.xmlpull.v1.XmlPullParserException: expected: START_TAG {http://schemas.xmlsoap.org/soap/envelope/}Envelope (position:START_TAG@2:7 in java.io.InputStreamReader@1956e49a)

    facing problem with httpTransport.call(SOAP_ACTION, envelope); could u please resolve this

    ReplyDelete
  40. I am getting networkonmainthreadexception .plz give me solution

    ReplyDelete
  41. hi...i did same code ..but i have an error like ths"Unfortunaly ur app force to close"

    ReplyDelete
  42. hi...my webserviices s workng fine ...pls check these url ..pls help me..:-(


    /** Called when the activity is first created. */
    private static final String SOAP_ACTION = "http://tempuri.org/GetVehicleDetails";

    private static final String OPERATION_NAME = "GetVehicleDetails";// your webservice web method name

    private static final String WSDL_TARGET_NAMESPACE = "http://tempuri.org/";

    private static final String SOAP_ADDRESS = "http://10.0.2.2:64987/WebSite1/Service.asmx/GetVehicleDetails";

    ReplyDelete
  43. Good example but..
    can you please provide example using Async Task

    ReplyDelete
  44. Please help.
    java.lang.IllegalArgumentException: is == null, below are my logcat messages.

    10-15 17:22:30.865 27119-27134/com.example.admin.sqlservice W/System.err: java.lang.IllegalArgumentException: is == null
    10-15 17:22:30.865 27119-27134/com.example.admin.sqlservice W/System.err: at org.kxml2.io.KXmlParser.setInput(KXmlParser.java:1625)
    10-15 17:22:30.865 27119-27134/com.example.admin.sqlservice W/System.err: at org.ksoap2.transport.Transport.parseResponse(Transport.java:117)
    10-15 17:22:30.869 27119-27134/com.example.admin.sqlservice W/System.err: at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:275)
    10-15 17:22:30.869 27119-27134/com.example.admin.sqlservice W/System.err: at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:118)
    10-15 17:22:30.869 27119-27134/com.example.admin.sqlservice W/System.err: at org.ksoap2.transport.HttpTransportSE.call(HttpTransportSE.java:113)
    10-15 17:22:30.869 27119-27134/com.example.admin.sqlservice W/System.err: at com.example.admin.sqlservice.MainActivity$MyTask.doInBackground(MainActivity.java:84)
    10-15 17:22:30.869 27119-27134/com.example.admin.sqlservice W/System.err: at com.example.admin.sqlservice.MainActivity$MyTask.doInBackground(MainActivity.java:63)
    10-15 17:22:30.873 27119-27134/com.example.admin.sqlservice W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:288)
    10-15 17:22:30.873 27119-27134/com.example.admin.sqlservice W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
    10-15 17:22:30.873 27119-27134/com.example.admin.sqlservice W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
    10-15 17:22:30.877 27119-27134/com.example.admin.sqlservice W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
    10-15 17:22:30.877 27119-27134/com.example.admin.sqlservice W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
    10-15 17:22:30.877 27119-27134/com.example.admin.sqlservice W/System.err: at java.lang.Thread.run(Thread.java:841)

    ReplyDelete
  45. This comment has been removed by the author.

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  49. I found the error : java.lang.illegalargumentexception.
    Please help me to resolve.

    ReplyDelete
  50. hello,sir
    how to solve error:java.net.Stacktimeout exception.
    please reply

    ReplyDelete
    Replies
    1. You can do with AsyncCallWS task method.

      button1.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
      id=edata.getText().toString();
      AsyncCallWS task = new AsyncCallWS();
      task.execute();

      }
      });
      private class AsyncCallWS extends AsyncTask {

      @Override
      protected String doInBackground(String... params) {
      request = new SoapObject(NAMESPACE, "findContact");
      eid=new PropertyInfo();
      eid.setName("eid");
      eid.setValue(id);
      eid.setType(String.class);
      request.addProperty(eid);
      envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
      // creating a serialized envelope which will be used to carry the
      // parameters for SOAP body and call the method
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  51. I am getting error in line " request.addProperty(propertyInfo, studentNo);" as "The method add property from the type soapobject is deprecated" Please help what to do how to resolve this ?

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  58. Error: error: class Main is public, should be declared in a file named Main.java


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    Thanks in advance sir.

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