Question

How do I check whether an item already exists in a Listbox?
I am using VS 2008 ASP.NET 3.5 framework C#. I used the following code…

 if (ListBox1.Items.Contains(drp_branch.SelectedItem.Value + "-" + txt_acc_no.Text))
 {...}

Answer 1

Try this…

string toMatch = drp_branch.SelectedItem.Value + "-" + txt_acc_no.Text;
ListItem item = ListBox1.Items.FindByText(toMatch);
if (item != null)
{
    //found
}
else
{
    //not found
}