'**************************************************************************
'@author  Chandar

'@version 1.0
'Development Environment        :  MS Visual Studio .Net
'Name of the File               :  Client.cs

'Creation/Modification History  :
' 02-Jun-2003     Created
'
'Overview:

'The purpose of C# class file is to access Java Web Service using a proxy
'class. It defines methods to access different operations on Web Service
'based on user's selection.
'**************************************************************************


using System;

 class Client
 {
   /*
   * Main method of the class

   */
   public static void Main()
   {
     // print out the options user can exercise
     Console.WriteLine("Select the information you want..");
     Console.WriteLine("1 : Get All Department Numbers");
     Console.WriteLine("2 : Get Information of a Department");

     Console.WriteLine("3 : Get All Employee Numbers");
     Console.WriteLine("4 : Get Information of an Employee");
     Console.Write("Enter Choice :");

     // get the user's choice
     string sel =Console.ReadLine();
     int selection = int.Parse(sel);


     // call appropriate web service method based on user's choice
     switch(selection)
     {
       // get all the department numbers
       case 1 : InvokegetDeptNoArray();
                break;
       // get the information of a particular department
       case 2 :
                Console.Write("Enter Department No :");

                string deptno =Console.ReadLine();
                try
                {
                  // check if the input is a valid number
                  if (int.Parse(deptno)<=0)
                  {
                    Console.WriteLine("Invalid Number");
                    break;
                  }
                }

                catch(Exception e)
                {
                  Console.WriteLine("Invalid Number");
                  break;
                }
                // call method to get info of a department
                InvokegetDeptInfoArray(deptno);
                break;

       // call method to get employee numbers of all employees
       case 3 : InvokegetEmpNoArray();

                break;

       // get info of a particular employee
       case 4 :
                // get the employee number from user
                Console.Write("Enter Employee No :");
                string empno =Console.ReadLine();
                try
                {
                  // check if input is a valid number
                  if (int.Parse(empno)<=0)
                  {

                    Console.WriteLine("Invalid Number");
                    break;
                  }
                }
                catch(Exception e)
                {
                  Console.WriteLine("Invalid Number");
                  break;
                }
                // invoke method to get employee information
                InvokegetEmpInfoArray(empno);
                break;
       default: Console.WriteLine("Invalid Selection");

                break;
      }
    }

    /*
    * This method invokes the web service to get information of a particular department
    */
    public static void InvokegetDeptInfoArray(string deptno)
    {
      // instantiate proxy class
      com.oracle.otn.OTNDeptEmp oTNDeptEmp = new com.oracle.otn.OTNDeptEmp();

      // invoke web service method using proxy
      string[] getDeptInfoArrayResult = oTNDeptEmp.getDeptInfoArray(deptno);


      //print out the department information
      Console.WriteLine("--------------------------------");
      Console.WriteLine("Department Info..");
      for(int i=0;i<getDeptInfoArrayResult.GetLength(0);i++)
        Console.WriteLine(getDeptInfoArrayResult[i]);
      Console.WriteLine("--------------------------------");
    }

    /*
    * This method invokes the Web Service to get all department numbers
    */
    public static void InvokegetDeptNoArray()
    {
      // instantiate proxy class

      com.oracle.otn.OTNDeptEmp oTNDeptEmp = new com.oracle.otn.OTNDeptEmp();

      // call Web Service method to get department numbers
      string[] getDeptNoArrayResult = oTNDeptEmp.getDeptNoArray();

      // print out all the department numbers
      Console.WriteLine("--------------------------------");
      Console.WriteLine("Department Numbers..");
      for(int i=0;i<getDeptNoArrayResult.GetLength(0);i++)
        Console.WriteLine(getDeptNoArrayResult[i]);
      Console.WriteLine("--------------------------------");
    }

    /*
    * This method invokes the Web Service to get all employee numbers
    */

    public static void InvokegetEmpNoArray()
    {
      // instantiate proxy class
      com.oracle.otn.OTNDeptEmp oTNDeptEmp = new com.oracle.otn.OTNDeptEmp();

      // call Web Service method to get employee numbers in an array
      string[] getEmpNoArrayResult = oTNDeptEmp.getEmpNoArray();

      // print out the employee numbers
      Console.WriteLine("--------------------------------");
      Console.WriteLine("Employee Numbers..");
      for(int i=0;i<getEmpNoArrayResult.GetLength(0);i++)
        Console.WriteLine(getEmpNoArrayResult[i]);
      Console.WriteLine("--------------------------------");
    }

    /*

    * This method invokes the Web Service to get info of a particular employee
    */
    public static void InvokegetEmpInfoArray(string empno)
    {
      // instantiate proxy class
      com.oracle.otn.OTNDeptEmp oTNDeptEmp = new com.oracle.otn.OTNDeptEmp();

      // call Web Service method to get information of the employee
      string[] getEmpInfoArrayResult = oTNDeptEmp.getEmpInfoArray(empno);

      // print out the employee information
      Console.WriteLine("--------------------------------");
      Console.WriteLine("Employee Info..");
      for(int i=0;i<getEmpInfoArrayResult.GetLength(0);i++)
        Console.WriteLine(getEmpInfoArrayResult[i]);
      Console.WriteLine("--------------------------------");
    }
 }