专家坐堂-[求助]加载树报错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!

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-  Foxtable(狐表)  (http://www.foxtable.com/bbs/index.asp)
--  专家坐堂  (http://www.foxtable.com/bbs/list.asp?boardid=2)
----  [求助]加载树报错  (http://www.foxtable.com/bbs/dispbbs.asp?boardid=2&id=96470)

--  作者：铜豆
--  发布时间：2017/2/21 15:59:00
--  [求助]加载树报错

NodeMouseClick:
Dim Filter As String
Dim dr As DataRow = e.Node.DataRow
Dim Year As Integer = dr("年")
Dim Month As Integer = dr("月")
Dim day As Integer = dr("日")
If e.node.Text = "加载所有数据" Then
Filter = ""
Else
Select Case e.Node.Level
Case 0
Filter ="Year(日期) = " & Year
Case 1
Filter ="Year(日期) = " & Year & " And Month(日期) = " & Month
Case 2
Filter ="Year(日期) = " & Year & " And Month(日期) = " & Month & " And day(日期) = " & day
End Select
End If
DataTables("订单组合1").LoadFilter = Filter
DataTables("订单组合1").Load()
在点击加载所有数据时报错
报错信息为：未将对象引用设置到对象的实例。

--  作者：有点色
--  发布时间：2017/2/21 16:47:00
--

Dim dr As DataRow = e.Node.DataRow
Dim Year As Integer = dr("年")
Dim Month As Integer = dr("月")
Dim day As Integer = dr("日")

改成-----------------------------------------

Dim dr As DataRow = e.Node.FullName.split("\\")
Dim Year As Integer = ary(0)
Dim Month As Integer = ary(1)
Dim day As Integer = ary(2)

--  作者：铜豆
--  发布时间：2017/2/21 16:56:00
--

此主题相关图片如下：zsl118zhq_1487667279462_85.png

--  作者：有点色
--  发布时间：2017/2/21 18:10:00
--

哦，改成

Dim ary() As String = e.Node.FullName.split("\\")
Dim Year As Integer = ary(0)
Dim Month As Integer = ary(1)
Dim day As Integer = ary(2)

--  作者：铜豆
--  发布时间：2017/2/21 18:16:00
--
从字符串“加载所有数据”到类型“Integer”的转换无效。

--  作者：有点色
--  发布时间：2017/2/21 18:24:00
--

Dim Filter As String

If e.node.Text = "加载所有数据" Then

    Filter = ""

Else

    Dim ary() As String = e.Node.FullName.split("\\")
    Dim Year As Integer = ary(0)
    Dim Month As Integer = ary(1)
    Dim day As Integer = ary(2)

    Select Case e.Node.Level

        Case 0

            Filter ="Year(日期) = " & Year

        Case 1

            Filter ="Year(日期) = " & Year & " And Month(日期) = " & Month

        Case 2

            Filter ="Year(日期) = " & Year & " And Month(日期) = " & Month & " And day(日期) = " & day

    End Select

End If

DataTables("订单组合1").LoadFilter = Filter

DataTables("订单组合1").Load()

--  作者：铜豆
--  发布时间：2017/2/21 18:42:00
--
报错信息：索引超出了数组界限。

Dim ary() As String = e.Node.FullName.split("\\")
    Dim Year As Integer = ary(0)
    Dim Month As Integer = ary(1)
    Dim day As Integer = ary(2)
这段代码没讲过老师是否可详解一下，怎么调用数组了