[求助] - 专家坐堂 - Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

麻烦各位大神帮我看看这段代码哪里有问题！感谢！（总是提示：An item with the same key has already been added.）

Dim jb As New SQLJoinTableBuilder("查询表1","核定编制")

jb.AddCols("单位","编制_XXX编制","编制_参公编制","编制_事业编制" , "编制_工勤编制")

Dim d As fxDataSource = jb.BuildDataSource()

jb = New SQLJoinTableBuilder("查询表1","核定并行")

jb.AddCols("单位","核定职数_领导正职","核定职数_领导副职","核定职级_一级调研员","核定职级_二级调研员","核定职级_三级调研员","核定职级_四级调研员","核定职级_一级主任科员","核定职级_二级主任科员","核定职级_三级主任科员","核定职级_四级主任科员","核定职级_一级科员","核定职级_二级科员")

Dim d1 As fxDataSource = jb.BuildDataSource()

jb = New SQLJoinTableBuilder("查询表1","实有并行")

jb.AddCols("单位","实配职数_领导正职","实配职数_领导副职","实有职级_一级调研员","实有职级_二级调研员","实有职级_三级调研员","实有职级_四级调研员" ,"实有职级_一级主任科员","实有职级_二级主任科员","实有职级_三级主任科员","实有职级_四级主任科员","实有职级_一级科员","实有职级_二级科员")

Dim d2 As fxDataSource = jb.BuildDataSource()

d.Combine("单位",d1,"单位")

d.Combine("单位",d2,"单位")

d.Show("查询表1")

Tables("查询表1").Visible = False

DataTables("汇总表").DataRows.Clear

Dim f As New Filler

f.SourceTable = DataTables("查询表1") '指定数据来源

f.DataTable = DataTables("汇总表") '指定数据接收表

f.Fill() '填充数据

Tables("汇总表").AutoSizeCols

MainTable = Tables("汇总表")

大神的代码我试了一下，但是不明白后面的应该怎么改了！麻烦再给我看看！