listbox Refresh() in c#

Question

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


        

Answer 1

Use BeginUpdate and EndUpdate, that should solve it. No need to set the data source twice

listBox1.BeginUpdate();

listBox1.DataSource = myList;

listBox1.EndUpdate();