How to add objects to CComboBox

Question

I have declared my CComboBox as follows :

     final CCombo combobox= new CCombo(shell, SWT.BORDER);
     combobox.setBounds(30, 22, 88, 21);

     ResultSet result = statement.executeQuery();

I want to add an object of Class myCombo to combobox

     while(result.next())
     {
          String ProName=result.getString(1);
          String ProId=result.getString(2);
          myCombo comboItem=new myCombo(ProId,ProName); //OBJECT comboItem
          combobox.addElement(comboItem); //ERROR The method addElement(myCombo)  
                                             is undefined for the type CCombo
      }

Error in combobox.addElement(comboItem) .... but addElement() is already defined in CCombo.

This is class myCombo

class myCombo{
               private String ProId;
               private String ProName;


               public myCombo(String ProId, String ProName) {
                   this.ProId=ProId;
                   this.ProName=ProName;

               }

               public String getProductName() {
                      return ProName;
                   }

               public String getProductId() {
                      return ProId;
                   }

                   @Override
               public String toString() {
                      return ProName;
               }
        }

How to get back the data which is selected.
Showing ERROR as cant

combobox.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {



    myCombo item = (myCombo) combo.getItem(getSelectionIndex()) ; //ERROR

                    if (item!=null) {
                       System.out.printf("You've selected Product Name: %s, Product ID: %s%n", 
                             item.getProductName(), item.getProductId());
                    }

            }
        });

If you can, you should use JFace ComboViewer instead of a SWT CCombo direclty — Mirco, Jul 10 '14 at 13:51
Swing and SWT are completely different, you should make it clear which you are asking about. — greg-449, Jul 10 '14 at 13:55

akash · Accepted Answer · 2014-07-11T11:14:09.110

2

If you are using org.eclipse.swt.custom.CCombo than it does't have addElement(Object o) method.It has add(String s) method you have to override toString().

      myCombo comboItem=new myCombo(ProId,ProName); 
      combobox.add(comboItem.toString())

FOR EXAMPLE

           @Override
           public String toString() {
                  return ProId+":"+ProName;
           }

TO Fetch Selection,

  combo.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent e) {
            System.out.print("Selected Value-");
            System.out.print(combo.getItem(combo.getSelectionIndex()));
        }
    });

edited Jul 11 '14 at 11:14

answered Jul 10 '14 at 13:26

akash

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Thanks for you help also want to know. How to get back the data. At addSelectionListener – nosdalg Jul 10 '14 at 21:12
I cant find how to get the selected data from the combobox and convert into object – nosdalg Jul 11 '14 at 10:52
1

Or you can directly Print `System.out.println(combo.getItem(getSelectionIndex())));` – akash Jul 11 '14 at 10:58
The method getSelectionIndex() is undefined for the type new SelectionAdapter(){} **What should I define in getSelectionIndex() method** – nosdalg Jul 11 '14 at 11:08

How to add objects to CComboBox

1 Answers1