主题：[求助]关于时间列的统计（已解决）

必须先转换为数字，然后统计，得出结果后，将数字转换为时间。

Dim sum As Double
For Each dr As DataRow In DataTables("表A").DataRows
    If dr.IsNull("时间") = False Then
       Dim v As Integer = math.Floor(dr("时间"))
        sum = sum + v * 60 + (dr("时间") - v) * 100
    End If
Next
Dim h As Integer = sum \ 60
Dim m As Integer = sum - h * 60
Return h & ":" & Format(m,"00")