Check out if a value exists on the listview

Hello, 
in my form i got one textbox , one listview and one button

i want that when i click the button1 ,the program check out if there are already an item in the listview with the textbox1 value (a file path , so its string)

here is my code :

Code:

                       For Each item As ListViewItem In ListView1.Items
                If item.ListView.Items(0).Text = Textbox1.Text Then
                    MsgBox("the file exists in the listview")
                    Return
                ElseIf item.ListView.Items(0).Text <> Textbox1.Text Then
                    MsgBox("the file DOESN'T exists in the listview")
                    Return
                End If
            Next

the problem is , i think the execution of this code isn't really smooth , and it check only for the first item , not on the others , i want to make it check if that value exists an all items in the listview (but not in the sub-items) .

thanks you very much , please be quick if you can .