listbox Refresh() in c#

Question

int[] arr = int[100];
listBox1.DataSource = arr;
void ComboBox1SelectedIndexChanged(object sender, EventArgs e)
{
    .....//some processes
    listBox1.DataSource =         


        

Answer 1

The problem might come from the ListBox SelectionMode.

For a reason that I don't know, the databinding does not work when SelectionMode is SelectionMode.None.

A workaround could be:

listBox.SelectionMode = SelectionMode.MultiExtended;
listBox.DataSource = myDatasource;
listBox.SelectionMode = SelectionMode.None;

Hope it helps.