表格里要计算员工的工龄，需要得到的结果是几年几月几日，timespan里面没有年和月，我只会做到计算总天数，但是除365余数除30的这种方法肯定是不准确的，有没有更好的准确的方法？

Dim t As TimeSpan
t = Date.Today - CDate(CurrentTable.Current("进组时间"))
OutPut.Show("工龄:" & t.TotalDays)

Dim i As integer = Date.Today.Year - CDate(CurrentTable.Current("进组时间")).Year

OutPut.Show("工龄:" & i )

代码怎么写？

刚看到狐爸的回复，我试试

标准算法:

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点击浏览该文件:管理项目96.table

Select Case e.DataCol.name
    Case "入职日期"
        If e.DataRow.IsNull("入职日期") Then
            e.DataRow("工龄") = Nothing
        Else
            Dim tp As TimeSpan = Date.today - CDate(e.DataRow("入职日期"))
            e.DataRow("工龄") = Math.Round(tp.TotalDays / 365.2422,2)
        End If
End Select

提示： 平均一年365.2422天

Dim y As Integer = Date.Today.Year - CDate(CurrentTable.Current("进组时间")).Year
Dim m As Integer = Date.Today.Month - CDate(CurrentTable.Current("进组时间")).Month
Dim d As Integer = Date.Today.Day - CDate(CurrentTable.Current("进组时间")).Day
If d < 0 Then
    m = m - 1
    d = Date.DaysInMonth(Today.AddMonths(-1).Year,Today.AddMonths(-1).Month) + Date.Today.Day - CDate(CurrentTable.Current("进组时间")).Day
End If
If m < 0 Then
    y= y - 1
    m = 12 + Date.Today.Month - CDate(CurrentTable.Current("进组时间")).Month
End If
OutPut.Show("工龄:" & y & "年" & m & "月" & d & "天")

谢谢狐爸，解决了！！

Select Case e.DataCol.name
    Case "工龄"
        Dim y As Integer
        Dim m As Integer
        Dim d As Integer
        If e.DataRow.IsNull("进组时间") Then
            e.DataRow("工龄") = Nothing
        Else
            y = Date.Today.Year - CDate(e.DataRow("进组时间")).Year
            m = Date.Today.Month - CDate(e.DataRow("进组时间")).Month
            d = Date.Today.Day - CDate(e.DataRow("进组时间")).Day
            If d < 0 Then
                m = m - 1
                d = Date.DaysInMonth(Today.AddMonths(-1).Year,Today.AddMonths(-1).Month) + Date.Today.Day - CDate(e.DataRow("进组时间")).Day
            End If
            If m < 0 Then
                y= y - 1
                m = 12 + Date.Today.Month - CDate(e.DataRow("进组时间")).Month
            End If
            e.DataRow("工龄") = y & "年" & m & "个月" & d & "天"
        End If

End Select

我在表属性中的DataColChanged事件中加入如上代码，工龄没有自动计算，求解！！

必须重置才能触发吗？那多不方便啊，万一要修改还得重置，能不能只要"进组日期"列修改"工龄"列就自动触发修改呢？