主题：时间代码帮忙修改！！！！！！！！

Dim ls As String = ""
For i As Integer = 0 To 23
    For j As Integer = 0 To 59
        ls += iif(i < 10, "0" & i, i) & ":" & iif(j < 10, "0" & j, j) & "|"
    Next
Next

Dim cbx1 As WinForm.ComboBox = e.Form.Controls("ComboBox1")
cbx1.ComboList = ls.Trim("|")

这段代码得到是：00:00:00这种格式，怎么变成00:00这种格式的？