Refresh listbox from another form

Question

Well, when i press the "Add" button in Form2, i'd like to the listView1 in Form1, to do this again:

public void teste()
{
DataSetTableAdapters.ClientesTableAdapter adapter = new DataSetTableAdapters.ClientesTableAdapter();

            DataSet.ClientesDataTable clientes = adapter.GetData();

            foreach (DataSet.ClientesRow cliente in clientes)
            {
                ListViewItem item1 = listView1.Items.Add(cliente.nome);
            }
}

I'm calling it with:
Form1 Form1 = new Form1();
Form1.teste();

but the listview is adding nothing!
i have tried to put *.add("test");

but it doesn't work too. When i try to put
MessageBox.Show("test");
it works, then the problem is with the listbox adding.

ps: when i call the teste(); method on "Form1_Load", it works fine!


Any help?

Answer 1

Hi guilhermecvm,

Check out the similar post here.

Answer 2

sorry but i'm confused with that code, do i have to do all this just to refresh a listbox or have another way?

Answer 3

The solution I pointed was an MDI scenario, where one child form could cause another child form to refresh data. I think you dont't have the MDI case.

So, there are two ways I see you can solve your problem.can be solved.

1)

If you know the name of the form that has a listbox to refresh,

Create a public method in that form, say RefreshListBox();

And then from anywhere in the code, use :

((FormWithListBox)Application.OpenForms["FormWithListBox1"]).RefreshListBox();

If you don't want to place code to refresh listbox in that form, just create a public property to return that listbox, and use it to clear the old data and fill new data.


2)

Create a global DataTable which can be used as ListBox's DataSource, and when you change the DataSource from anywhere, the listbox will be updated.

Hope this solves your problem.