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CssImport when using Component Exporter by Mikhail Shabarov, 4 weeks ago
Recent Posts
Vaadin Forum4. Other

Read objects from Folder

Jet Beray
10 years ago May 25, 2012 5:39am

guys need help in reading objects from file.. here's my code.

// set a style name, so we can style rows and cells
        table.setStyleName("iso3166");

        // size
        table.setWidth("100%");
        table.setHeight("170px");

        // selectable
        table.setSelectable(true);
        table.setMultiSelect(true);
        table.setImmediate(true); // react at once when something is selected
        
        // set column headers
	table.addContainerProperty("Name", String.class, null);
	//table.addContainerProperty("Size", String.class, null);
	//table.addContainerProperty("Last Modified", String.class, null);
	File directory = new File("C:/Users/Jet/Documents/error/uploads");
	File fileList[] = directory.listFiles();
	for(int i = 0; i < fileList.length; i++){
            table.addItem( fileList[i].getName() );
	    System.out.println(fileList[i].getName());
	}
	     
	addComponent(table);

the main problem is, I cant load the objects in my table. viewing output using System.out.print seems to work well w/ the objects, the only problem is loading them into the table.

Charles Anthony
10 years ago May 25, 2012 6:39am

Hi,

Table#addItem creates an item, but does not set any properties on it. Those properties displayed as the contents of the column..

I think you'll want to do something like the following :

for(int i = 0; i < fileList.length; i++){
     Item item = table.addItem( fileList.getName() );
     item.getProperty("Name").setValue(fileList.getName());
        System.out.println(fileList.getName());
    }

Cheers,

Charles.

Last updated on May, 25th 2012
+1
Johannes Häyry
10 years ago May 25, 2012 8:22am

Table.addItem(Object) takes an id of the item you are adding. Just adding items to table with addItem doesn't show anything in the table, because the container properties don't have value. Do e.g. like this

Object id = table.addItem();
table.getContainerProperty(id, "Name").setValue(fileList[i].getName());

Btw. there's also a com.vaadin.data.util.FilesystemContainer you could use and put it as a container data source for the table.