Arraylist search string but no output

Question

Can anyone tell me, why I don't get any output with this on buttonclick?

string searchString = TextBox1.Text;
ArrayList personarraylist = new ArrayList();
foreach (Person a in personarraylist)
{
    if (searchString == Convert.ToString(a))
    {
         personarraylist.Add(a);
    }
}
ListBox1.DataSource = personarraylist;

EDIT:

Hi everybody, thanks for your input. I have a class for Person, and all data created on the pages is stored in a file: FileController.ReadFile(Server.MapPath("~/App_Data/Personfile.ser")); This is where I need my data from. I use a Filecontroller class to write and read (also update) to and from the file. But the Search function has just gotten the better part of me. (as a student the data handling in file was required, or I would have used a DB). Hope this clears my code up a little. And do I have to compare the search term to something e g firstName, or can it work through the whole file?

Answer 1

You create a new array list and then immediately foreach over it. Since you just created it there are no items in it, so the foreach does nothing.