How to check if an item exists in a Listbox in asp.net?

Question

How to check if an item exists in a list?
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 it...

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

Answer 2

you can use this to check if the exsits element is in the list or not ...

 string checkitem = drp_branch.SelectedItem.Value + "-" + txt_acc_no.Text; if ((ListBox1.Items.Contains(checkitem) == true)) { Response.Write("Item exists"); } else { Response.Write("Item not exists"); }