主题：否能利用临时表进行分页加载

1、使用SQLLoad方法进行分页加载，限制太多，数据库要SQL2005以上，其他的不行

分页语法，参考

 

https://blog.csdn.net/qq269228887/article/details/13769283

 

loadover可以用别的列分页的，但此列如果不唯一，分页可能出错

1、请问生成的临时表有没有[_SortKey]和[_Identify]的列，与原表有没有关系？

1、生成的临时表有没有[_SortKey]和[_Identify]的列看是使用什么方法生成的。基本和原表没有关系。

如果用Dim cmd As New SQLCommand生成的临时表有没有[_SortKey]和[_Identify]的列？

看使用了什么sql，如果原表有，sql也返回，那么就有

我的设想是用自定义筛选树和分页加载。DataTables(“招标信息”)起始不加载数据，如何利用下面生成临时表dt的排序进行DataTables(“招标信息”)分页加载？

1、你的临时表，没有 _Identify 列。

 

2、你这种方法也是无法做到你需要的效果的。你必须另外加一列，给这一列从1到n赋值。

利用临时表进行分页加载及筛选树选择等功能基本达到要求，但现在有二个问题：

 

1、为空的，我测试没问题。请截图说明。

 

2、

 

'Functions.Execute("项目筛选树Trv_sxs_AfterCheckNode_e",e)

Dim s As String = e.Form.Controls("Chebox_sxs").Text
Dim tb1 As Table = Tables(e.Form.Name & "_Table1")
Dim dt As DataTable = lsbdt
Dim Colstr() As String
Dim qts As String() = {"'","#",""}
Dim trv As WinForm.TreeView = e.Sender
Dim flt As String = ""
Dim nd As WinForm.TreeNode
Dim pd As WinForm.TreeNode
Dim notchecked As Integer = 0
Colstr = s.split("|")

For Each nd In e.Node.AllNodes  '清除子节点的选中标记
    nd.Checked = False
Next
pd = e.Node.ParentNode
Do While pd IsNot Nothing    '清除父节点的选中标记
    pd.Checked = False
    pd = pd.ParentNode
Loop

For Each nd In trv.AllNodes
    If nd.Checked  Then
        If nd.Name = "显示所有项目" Then
            Exit For
        Else
           
            Dim rts() As String = nd.FullPath.Split("\")
            Dim val As String = ""
            For i As Integer = 0 To rts.length - 1
                If dt.DataCols(Colstr(i)).IsString Then
                    If rts(i) <> "空" Then
                        If val > "" Then
                            val = val & " And "
                            val = val & Colstr(i) & " = " & qts(0) & rts(i) & qts(0)
                        Else
                            val = val & Colstr(i) & " = " & qts(0) & rts(i) & qts(0)
                        End If
                    ElseIf rts(i) = "空" Then
                        If val > "" Then
                            val = val & " And "
                            val = val & Colstr(i) & " Is Null"
                        Else
                            val = val & Colstr(i) & " Is Null"
                        End If
                    End If
                ElseIf dt.DataCols(Colstr(i)).IsDate Then
                    If rts(i) <> #0001-1-1 0:00:00# Then
                        If val > "" Then
                            val = val & " And "
                            val = val & Colstr(i) & " = " & qts(1) & rts(i) & qts(1)
                        Else
                            val = val & Colstr(i) & " = " & qts(1) & rts(i) & qts(1)
                        End If
                    ElseIf rts(i) = #0001-1-1 0:00:00# Then
                        If val > "" Then
                            val = val & " And "
                            val = val & Colstr(i) & " Is Null"
                        Else
                            val = val & Colstr(i) & " Is Null"
                        End If
                    End If
                ElseIf dt.DataCols(Colstr(i)).IsNumeric Then
                    If rts(i) <> 0 Then
                        If val > "" Then
                            val = val & " And "
                            val = val & Colstr(i) & " = " & qts(2) & rts(i) & qts(2)
                        Else
                            val = val & Colstr(i) & " = " & qts(2) & rts(i) & qts(2)
                        End If
                    ElseIf rts(i) = 0 Then
                        If val > "" Then
                            val = val & " And "
                            val = val & Colstr(i) & " Is Null"
                        Else
                            val = val & Colstr(i) & " Is Null"
                        End If
                    End If
                ElseIf dt.DataCols(Colstr(i)).IsBoolean Then
                    If rts(i) <> False Then
                        If val > "" Then
                            val = val & " And "
                            val = val & Colstr(i) & " = " & qts(0) & True & qts(0)
                        Else
                            val = val & Colstr(i) & " = " & qts(0) & True & qts(0)
                        End If
                    ElseIf rts(i) = False Then
                        If val > "" Then
                            val = val & " And "
                            val = val & Colstr(i) & " = " & qts(0) & False & qts(0)
                        Else
                            val = val & Colstr(i) & " = " & qts(0) & False & qts(0)
                        End If
                    End If
                End If
            Next
            If flt > "" Then
                flt = flt & " Or (" & val & ")"
            Else
                flt = val
            End If
            notchecked + = 1
        End If
    End If
Next
msgbox(flt)
Dim lst As List(of String)
If flt > "" AndAlso  notchecked > 0 Then
    lst = lsbdt.GetValues("系统编号",flt,"idx")
Else
    lst = lsbdt.GetValues("系统编号","","idx")
End If

bhlst = Nothing
bhlst = lst

lsbcnt = Nothing
lsbcnt = lst.Count

''加载第一页数据
e.Form.Strips("主菜单").Items("btnFirst").PerformClick()

''