HOWTO: Filter Messages Using CDO with Visual J++

• Microsoft Visual J++, version 6.0
• Collaboration Data Objects (CDO), version 1.21

SUMMARY

This article contains a code sample showing how to filter messages with CDO in Visual J++.

The code sample demonstrates the folowing functionalities:

• How to set MessageFilter object's properties



• How to traverse the Messages collection using GetFirst, GetNext, and GetItem methods



• How to retrieve the attachment files



• How to save the attachment to the disk



• How to terminate the program using the System object

MORE INFORMATION

Follow these steps to build and run the sample code:

1. Start Visual J++ 6.0 and create a new Console Application project.



2. In the Project-Explorer window, open your Project tree and double-click the Class1.java file created for you.



3. From the Project menu, select Add COM Wrapper, click Microsoft Cdo 1.21 Library, and click OK.



4. Ignore the created code and replace it with the following code. Make sure you make the necessary changes whenever you see the "TO DO" comment.



5. Compile and run the code.

Sample Code

import com.ms.wfc.ui.*;  //to use MessageBox
import com.ms.com.*; 
import cdo.*;
 
public class Class1
{ 
  public static void main(String args[]) 
  { 
     try
     {
	//Creae a session
	_Session session = (_Session) new Session(); 
 
	//Create a Variant null parameter for later use
	Variant nullParam = new Variant(); 
	nullParam.noParam(); 
		
	//Create a profile and logon
	Variant profileName = new Variant(); 
	profileName.putString("<profileName>"); //TO DO: put your profile name
	session.Logon( profileName, nullParam, nullParam,nullParam, 
		                    nullParam, nullParam, nullParam );
	
	//Go to the Inbox
	Folder inbox = (Folder)session.getInbox().getDispatch();
		
	//Get the messages collections inbox
	Messages msgs =(Messages)inbox.getMessages().getDispatch();

		
	MessageFilter myFilter = (MessageFilter)msgs.getFilter().getDispatch();
	Variant mySubject = new Variant();
	mySubject.putString("test");
	myFilter.setSubject( mySubject );
				
	Variant msgType = new Variant();
	msgType.putString("IPM.Note");
 
	MessageBox.show("Message Count = " + msgs.getCount(), 
                        "After Filter");
	
	if(msgs.getCount().toInt()==0)
	{
	    System.exit(0);			
	}
	
	Message msg = (Message)msgs.GetFirst(msgType).getDispatch();
	//Or you can use another way to get the first message
         //Variant index = new Variant().
         //index.putInt(1);
         //Message msg = (Message)msgs.getItem(index).getDispatch();
		
         //Display some propeties of the message
	MessageBox.show("Sender: " + msg.getSender().toString() + "\n" +
		       "Subject: " + msg.getSubject().toString() + "\n" +
		       "Text: " + msg.getText().toString(), 
                         "The First Message" );
		
         //Get addressEntry object in order to get the email address
	AddressEntry entry = (AddressEntry)msg.getSender().getDispatch();
		

         //Display the email address of the Sender
	MessageBox.show("Email Address: " + entry.getAddress().toString(),                                                                                         "The First Message");
	
	//Get the attachments collections
	Attachments attachs = (Attachments)msg.getAttachments().getDispatch();

	MessageBox.show("Attach Count = " + attachs.getCount(), 
                         "The First Message");
	if(attachs.getCount().toInt()==0)
	{
	    System.exit(0);			
	}	
	
	//Get the first attachment
	Variant index = new Variant();
	index.putInt(1);
		
	Attachment attach = (Attachment)attachs.getItem(index).getDispatch();
		
	
	MessageBox.show("Attach: DisplayName: " 
			+ attach.getName().toString() + "\n"
			+ "Attach: Source : "
			+ attach.getSource().toString(), 
                           "The First Message" );

         //Save the attachment to a file, 
         //here you may want to check the type of the attachment file
	Variant fileName = new Variant();
	fileName.putString("C:\\temp\\testtest.bat");
	attach.WriteToFile( fileName );
	

         //Get the second message
	if(msgs.getCount().toInt()<=1)
	{
	     System.exit(0);			
	}
	
	msg = (Message)msgs.GetNext().getDispatch();
	//Or you can use the next line to get the next message
         //Variant index = new Variant().
         //index.putInt(2);
	//Message msg = (Message)msgs.getItem(index).getDispatch();
		
         //Display some propeties of the message
	MessageBox.show("Sender: " + msg.getSender().toString() + "\n" +
		       "Subject: " + msg.getSubject().toString() + "\n" +
		       "Text: " + msg.getText().toString(), 
                         "The Second Message" );
		
	//Finally, logoff
	session.Logoff(); 
		
	//Clean up  
         session = null;		
         inbox = null;
         msgs = null;
         myFilter = null;
         msg = null;
         entry = null;
         attachs = null;
         attach = null;
    } 
    catch( Exception e ) 
    { 
         e.printStackTrace(); 
	MessageBox.show(e.toString(), "e.toString");
    } 
    System.out.println( "Project terminates!" ); 
  } 
}   

REFERENCES

For more information about using CDO with Visual J++, please see the following article in the Microsoft Knowledge Base:

Q216723 How to Send a Message using CDO with Visual J++

Additional query words: kbActMsg kbMsg kbCDO121 kbVJ600

Keywords          : kbActMsg kbCDO121 kbMsg kbVJ600 
Version           : WINDOWS:1.21,6.0
Platform          : WINDOWS 
Issue type        : kbhowto 

Last Reviewed: March 27, 1999