How create a login in window phone using web service

Question

Hello im beginner in programming skill . i m creating  a window phone 8 application where simple a user is creating a account and login ..

i have made the  code in web service  using stored procedure  . web service is run fine . in webform but i cant make  that run in window phone 8 app . 

plz . tell me how to do it . login with webservices in window phone  

 

 Web service 

public DataSet Login(string username, string password)

{

string pwdhash = FormsAuthentication.HashPasswordForStoringInConfigFile(password, "SHA1");

SqlConnection con = new SqlConnection(strcon);

SqlCommand cmd = new SqlCommand();

cmd.Connection = con;

cmd.CommandType = CommandType.StoredProcedure;

cmd.CommandText = "loginProcedure";

SqlParameter param = new SqlParameter("@username", username);

SqlParameter param2 = new SqlParameter("@password", pwdhash);

cmd.Parameters.Add(param);

cmd.Parameters.Add(param2);

con.Open();

SqlDataAdapter da = new SqlDataAdapter(cmd);

DataSet ds = new DataSet();

da.Fill(ds);

return ds;

} 

 

window phone  

private void button1_Click(object sender, RoutedEventArgs e)

{

SnaprintWebserviceReferance.SnaPrintWebServiceSoapClient obj = new SnaprintWebserviceReferance.SnaPrintWebServiceSoapClient();

obj.aloginCompleted += new EventHandler<SnaprintWebserviceReferance.aloginCompletedEventArgs>(obj_aloginCompleted);

obj.aloginAsync(textBox1.Text, textBox2.Text);

Data ds = obj.aloginAsync(textBox1.Text, textBox2.Text);

if (ds.Tables[0].Rows.Count > 0)

{

label1.Text = "Hi ," + ds.Tables[0].Rows[0][1].ToString();

}

else

{

label1.Text = "Check  UserName or Password.";

}

}