[求助]引用 - 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!

老师，下面代码总是重复引用。我把他放在项目事件中的 AfterOpenProject

Dim cmd5 As New SQLCommand

Dim dt As DataTable

cmd5.Co nnecti

Dim t5 As Table = Tables("进销存")

Dim filter = iif(t5.filter > "", t5.filter, "1=1")

cmd5.CommandText = "SEL ECT DISTINCT year(日期) as 年, 来源,客户ID,客户名称 from {进销存} where " & filter

dt = cmd5.ExecuteReader()

For Each dr As DataRow In dt.datarows

filter = "年份 = '" & dr("年") & "' and 来源 = '" & dr("来源") & "' and 客户名称 = '" & dr("客户名称") & "'"

Dim ndr As DataRow = DataTables("年度统计").find(filter)

If ndr Is Nothing Then

ndr = DataTables("年度统计").addnew

End If

ndr("年份") = dr("年")

ndr("来源") = dr("来源")

ndr("客户名称") = dr("客户名称")

老师，打开项目就会重复复制被引用的字段。

此主题相关图片如下：重复复制.jpg

老师，是来源值是空引起的。下面代码修改不好。

Dim cmd5 As New SQLCommand '年度统计

Dim dt As DataTable

cmd5.C

Dim t5 As Table = Tables("进销存")

Dim filter = iif(t5.filter > "", t5.filter, "1=1")

cmd5.CommandText = "SEL CT DISTINCT year(日期) as 年, 来源,客户ID,客户名称 from {进销存} where " & filter

dt = cmd5.ExecuteReader()

For Each dr As DataRow In dt.datarows

filter = "年份 = '" & dr("年") & "' and 来源 = '" & dr("来源") & "' and 客户名称 = '" & dr("客户名称") & "'"

Dim ndr As DataRow = DataTables("年度统计").find(filter)

If ndr Is Nothing Then

ndr = DataTables("年度统计").addnew

End If

ndr("年份") = dr("年")

ndr("来源") = dr("来源")

ndr("客户名称") = dr("客户名称")

Dim Filter As String

If dr.isnull("年")=False Then

Filter = "年份 = '" & dr("年") & "'"

End If

If dr.isnull("来源")=False Then

If Filter > "" Then

Filter = Filter & " And "

End If

Filter = Filter & "来源 = '" & dr("年") & "'"

End If

主题：[求助]引用