Dim n,n1,n2,i,max,min As Integer
Dim Zy,T As String
Dim tb1,tb2 As Table
Dim r,r1,r2 as row

tb1 = Tables("地址")
tb2 = Tables("地址.用户")
tb1.Filter = "路名 is not null"

  For Each k As Row in Tables("地址.用户").Rows   
    if k("状态") ="" then
        if k("有效日期") >#1/1/2008# AndAlso K("有效插数") <>0 OrElse K("用户类别") = "全免户" then
            k("状态")= "有效"
        else k("状态")= "无效"
        end if
    end if

    k("层") = k("生成房号").SubString(0,k("生成房号").Length - 2)
    k("号") = k("生成房号").SubString(k("生成房号").Length - 2)
   Next 
       
        r = tb1.current
       for each r1 in tb2.rows
          zy =zy & "|" & r1("生成房号")
       Next
        n1 = tb2.Compute("min(层)")
        n2 = tb2.Compute("max(层)")
        min = tb2.Compute("min(号)")
        max = tb2.Compute("max(号)")
        if n2 > n1 AndAlso n1 > 0 then
            tb2.Redraw = False
            For n = n1 to n2
                For i = min to max
                    T =  n & format(i,"00")                 
                    if Zy.IndexOf(T) = -1 then
                       r2 = tb2.addnew
                       r2("生成房号") = T
                        r2("房号") = T
                       r2("状态") ="无资料"
                        r2("路名") = r("路名")
                        r2("街名") = r("街名")
                        r2("号码") = r("号码")
                        r2("栋") = r("栋")
                        r2("小区") = r("小区")
                        r2("梯") = r("梯")
                    end if
                Next
            Next
            tb2.Redraw = true
        end if

这个代码是向子表增加记录，有点奇怪啊，第一次运行这段代码时，父表的当前记录（r = tb1.current）会自动向下移一条记录，（相应的会在当前行的下一条记录的子表增加了记录，）第二次以后运行这段代码就不会了，选择父表的记录，就会向那条记录的关联子表增加数据了，完全正常了。同一段代码，第一次运行代码和第二次运行代码都有点区别吗？是那里出问题了？