表中如果没有“数量”字段，直接按员工工号在每一行出现的次数统计应该怎么改？

员工工号：

002，004，009

002，009，038

统计002为2次，009为2次。

Dim dt As DataTable
Dim dtb As New DataTableBuilder("统计")
Dim lst As New Dictionary(of String ,DataRow)
dtb.AddDef("工号", Gettype(String), 16)
dtb.AddDef("数量", Gettype(Double))
dt = dtb.Build
For Each dr1 As DataRow In DataTables("产量登记表_多值字段").DataRows
    If dr1.IsNull("员工工号") = False Then
        Dim nms() As String = dr1("员工工号").Split(",")
        Dim v As Double = dr1("数量")/ nms.Length
        For Each nm As String In nms
            Dim dr2 As DataRow
            If lst.ContainsKey(nm)
                dr2= lst(nm)
            Else
                dr2 = dt.AddNew()
                dr2("工号") = nm
                lst.add(nm,dr2)
            End If
            dr2("数量") = dr2("数量") + v
        Next
    End If
Next