以文本方式查看主题 - Foxtable(狐表) (http://foxtable.net/bbs/index.asp) -- 专家坐堂 (http://foxtable.net/bbs/list.asp?boardid=2) ---- 关于临时表的主键字段 (http://foxtable.net/bbs/dispbbs.asp?boardid=2&id=169097) |
-- 作者:南望 -- 发布时间:2021/6/2 16:24:00 -- 关于临时表的主键字段 下面代码中涉及到“_Identify”字段,请问老师临时表如何拥有这样一个相同功能的“_Identify”字段?(主键) Dim idx As String = "-1," Dim idx_temp As String = "" Dim pdr As DataRow = Nothing Dim count As Integer = 0 Dim cs As String = "字段1" For Each dr As DataRow In DataTables("table1").Select("", cs) Dim flag As Boolean = False If pdr IsNot Nothing Then For Each c As String In cs.split(",") If pdr(c).replace(" ","") <> dr(c).replace(" ", "") Then flag = True Exit For End If Next If flag Then If count > 1 Then idx &= idx_temp End If count = 1 idx_temp = "" Else count += 1 idx_temp &= dr("_Identify") & "," End If Else count += 1 End If pdr = dr Next If count > 1 Then idx &= idx_temp End If Tables("table1").filter = "_Identify not In (" & idx.trim(",") & ")"
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-- 作者:有点蓝 -- 发布时间:2021/6/2 16:28:00 -- 什么样的临时表,怎么创建的表? |
-- 作者:南望 -- 发布时间:2021/6/2 16:45:00 -- If Tables.Contains("临时表") = False Then Dim dtb As New DataTableBuilder("临时表") dtb.AddDef("字段1", Gettype(String),500) dtb.AddDef("字段2", Gettype(String),500) dtb.Build() MainTable= Tables("临时表") End If 然后用TABLES("临时表").Addnew加的数据
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-- 作者:有点蓝 -- 发布时间:2021/6/2 16:56:00 -- Dim dtb As New DataTableBuilder("临时表") dtb.AddDef("_Identify", Gettype(Integer)) dtb.AddDef("字段1", Gettype(String),500) dtb.AddDef("字段2", Gettype(String),500) dtb.Build() DataTables("临时表").basetable.Columns("_Identify").AutoIncrement = True DataTables("临时表").basetable.Columns("_Identify").AutoIncrementSeed = 1 MainTable= Tables("临时表") Dim r As Row = Tables("临时表").AddNew Output.Show(r("_Identify")) r = Tables("临时表").AddNew Output.Show(r("_Identify"))
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