专家坐堂-[求助]帮忙分析代码哪出错了?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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--  专家坐堂  (http://foxtable.net/bbs/list.asp?boardid=2)
----  [求助]帮忙分析代码哪出错了?  (http://foxtable.net/bbs/dispbbs.asp?boardid=2&id=12220)

--  作者：紙上不談兵
--  发布时间：2011/8/26 11:49:00
--  [求助]帮忙分析代码哪出错了?

把此文件替换范例的[目录树管理],代码详见AfterSelectNode,
想法:设置节点BackColor,标记最近选择4个节点.

随便选择节点,点击多次就会间中报错!实在不知哪错了?请大家帮忙分析一下,多谢!

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点击浏览该文件:目录树管理.table

此主题相关图片如下：000.gif

--  作者：狐狸爸爸
--  发布时间：2011/8/26 12:09:00
--

If Lsj.Contains(e.Node.Text) = False Then
   Lsj.Add(e.Node.Text)
End If
e.Form.Controls("TextBox2").value =Nothing
For Each s As String In Lsj
    e.Form.Controls("TextBox2").value += "," & s
Next

If Lsj.count>3 Then
    For Each nd As WinForm.TreeNode In e.Sender.AllNodes
        If nd.Text = Lsj(0) Then
            nd.BackColor = Color.White
            Lsj.RemoveAt(0)
            If lsJ.Count =0 Then
                Exit For
            End If
        End If
    Next
End If

For Each nd As WinForm.TreeNode In e.Sender.AllNodes
    For Each s As String In Lsj
        If nd.Text = s Then
            nd.BackColor = Color.LightGray
        End If
    Next
Next

--  作者：紙上不談兵
--  发布时间：2011/8/26 12:34:00
--

以下是引用狐狸爸爸在2011-8-26 12:09:00的发言：

If Lsj.Contains(e.Node.Text) = False Then
   Lsj.Add(e.Node.Text)
End If
e.Form.Controls("TextBox2").value =Nothing
For Each s As String In Lsj
    e.Form.Controls("TextBox2").value += "," & s
Next

If Lsj.count>3 Then
    For Each nd As WinForm.TreeNode In e.Sender.AllNodes
        If nd.Text = Lsj(0) Then
            nd.BackColor = Color.White
            Lsj.RemoveAt(0)
            If lsJ.Count =0 Then
                Exit For
            End If
        End If
    Next
End If

For Each nd As WinForm.TreeNode In e.Sender.AllNodes
    For Each s As String In Lsj
        If nd.Text = s Then
            nd.BackColor = Color.LightGray
        End If
    Next
Next

多谢先!
这个是不报错了,只是有点不明:我设置了If Lsj.count>3 Then才执行If...End if里面的代码呀,为何里面还须
If lsJ.Count =0 Then
   Exit For
End If 呢?
且虽不报错,但有时结果不对:见图,TextBox2显示Lsj有[数码产品,电脑,电脑配件,机箱,主板]5个值,但标记只有[主板]

此主题相关图片如下：00.gif

--  作者：紙上不談兵
--  发布时间：2011/8/26 13:11:00
--

明白哪出错了:如不加Exit For,则Lsj为空时执行RemoveAt(0)会报错!多谢狐爸,正确的是:

If Lsj.Contains(e.Node.Text) = False Then
   Lsj.Add(e.Node.Text)
End If

If Lsj.count>3 Then
    For Each nd As WinForm.TreeNode In e.Sender.AllNodes
        If nd.Text = Lsj(0) Then
            nd.BackColor = Color.White
            Lsj.RemoveAt(0)
   Exit For
        End If
    Next
End If

For Each nd As WinForm.TreeNode In e.Sender.AllNodes
    For Each s As String In Lsj
        If nd.Text = s Then
            nd.BackColor = Color.LightGray
        End If
    Next
Next

--  作者：狐狸爸爸
--  发布时间：2011/8/26 14:03:00
--