客观的:
管理用户与 Excel 表 (ListObjects) 交互时发生的情况
最后的想法是为不同的表提供自定义事件。例如,当您向 table1 添加一行时,会引发自定义 AddEvent1,当您对 table2 执行相同操作时,会引发 AddEvent2。
将只有一个类来管理事件,而一个类来保存表格及其信息。
所以建议的过程是:
- 将 listobject 添加到一个名为
Table
- 该类将监听父工作表(
Change
和SelectionChange
)上的事件 TableManager
当更改事件被触发时,从处理这些事件的类中触发一个自定义事件(像adding
,updating
或deleting
rows 的事件)
编辑#1:
调整代码:
- 该
Create
函数现在返回一个实例Table
- 并且该属性
Set SourceTable
现在将listObjectParentSheet
字段设置为相应的值
但是仍然Table Manager
不听引发的事件 listObjectParentSheet_Change
成分:
1) 带有 Excel 表格 (ListObject) 的工作表和后面的代码:
Private Sub Worksheet_Activate()
Dim myTable As Table
Dim myTableManager As TableManager
Set myTable = Table.Create(Me.ListObjects(1))
Set myTableManager = New TableManager
Set myTableManager.TableInstance = myTable
End Sub
2) 类Table
(使用Rubberduck将预先声明的 id 设置为 true )
'@Folder("VBAProject")
Option Explicit
'@PredeclaredId
Private Type TTable
SourceTable As ListObject
End Type
Private this As TTable
Private WithEvents listObjectParentSheet As Excel.Worksheet
Public Event AddEvent()
Public Property Get SourceTable() As ListObject
Set SourceTable = this.SourceTable
End Property
Public Property Set SourceTable(ByVal value As ListObject)
Set this.SourceTable = value
Set listObjectParentSheet = value.Parent
End Property
Public Property Get Self() As Table
Set Self = Me
End Property
Public Function Create(ByVal EvalSourceTable As ListObject) As Table
With New Table
Set .SourceTable = EvalSourceTable
Set Create = .Self
End With
End Function
Private Sub listObjectParentSheet_Change(ByVal Target As Range)
If Not Intersect(Target, SourceTable.DataBodyRange) Is Nothing Then
MsgBox listObjectParentSheet.Name & " " & Target.Address
RaiseEvent AddEvent
End If
End Sub
3) 类TableManager
Option Explicit
Private WithEvents m_table As Table
Public Property Get TableInstance() As Table
Set TableInstance = m_table
End Property
Public Property Set TableInstance(ByRef tableObject As Table)
Set m_table = tableObject
End Property
Private Sub m_table_AddEvent()
MsgBox "Adding something"
End Sub
问题/问题:
我还没有弄清楚如何在TableManager
课堂上触发“AddEvent”。我知道我搞砸了一些实例化类的概念,但我不知道我做错了什么。
预期结果:
AddEvent
当用户更改列表对象的任何单元格时,在引发时显示消息框“添加内容”
任何帮助将非常感激。
编辑#2
最终代码感谢 Mat 的回答:
表Sheet1
::
Private Sub Worksheet_Activate()
With TableManager
Set .TableEvents = Table.Create(Sheet1.ListObjects(1))
End With
End Sub
模块:ListObjectUtilities
Option Explicit
Public Function GetCellRow(ByVal EvalTable As ListObject, ByVal EvalCell As Range) As Long
If Intersect(EvalCell, EvalTable.DataBodyRange) Is Nothing Then Exit Function
GetCellRow = EvalCell.Row - EvalTable.HeaderRowRange.Row
End Function
Public Function GetCellColumn(ByVal EvalTable As ListObject, ByVal EvalCell As Range) As Long
If Intersect(EvalCell, EvalTable.DataBodyRange) Is Nothing Then Exit Function
GetCellColumn = EvalCell.Column - EvalTable.HeaderRowRange.Column + 1
End Function
班级:ITable
Option Explicit
Public Property Get SourceTable() As ListObject
End Property
班级:Table
'@Folder("VBAProject")
'@PredeclaredId
Option Explicit
Private WithEvents TableSheet As Excel.Worksheet
Private Type TTable
SourceTable As ListObject
LastRowCount As Long
LastColumnCount As Long
End Type
Private this As TTable
Public Event Changed(ByVal cell As Range)
Public Event AddedNewRow(ByVal newRow As ListRow)
Public Event AddedNewColumn(ByVal newColumn As ListColumn)
Implements ITable
Public Function Create(ByVal Source As ListObject) As ITable
With New Table
Set .SourceTable = Source
Set Create = .Self
End With
End Function
Public Property Get Self() As Table
Set Self = Me
End Property
Public Property Get SourceTable() As ListObject
Set SourceTable = this.SourceTable
End Property
Public Property Set SourceTable(ByVal value As ListObject)
ThrowIfSet this.SourceTable
ThrowIfNothing value
Set TableSheet = value.Parent
Set this.SourceTable = value
Resize
End Property
Friend Sub OnChanged(ByVal Target As Range)
RaiseEvent Changed(Target)
End Sub
Friend Sub OnAddedNewRow(ByVal newRow As ListRow)
RaiseEvent AddedNewRow(newRow)
End Sub
Friend Sub OnAddedNewColumn(ByVal newColumn As ListColumn)
RaiseEvent AddedNewColumn(newColumn)
End Sub
Private Sub ThrowIfNothing(ByVal Target As Object)
If Target Is Nothing Then Err.Raise 5, TypeName(Me), "Argument cannot be a null reference."
End Sub
Private Sub ThrowIfSet(ByVal Target As Object)
If Not Target Is Nothing Then Err.Raise 5, TypeName(Me), "This reference is already set."
End Sub
Private Sub Resize()
With this.SourceTable
this.LastRowCount = .ListRows.Count
this.LastColumnCount = .ListColumns.Count
End With
End Sub
Private Sub TableSheet_Change(ByVal Target As Range)
If Intersect(Target, SourceTable.DataBodyRange) Is Nothing Then Exit Sub
Select Case True
Case this.SourceTable.DataBodyRange.Columns.Count > this.LastColumnCount
OnAddedNewColumn SourceTable.ListColumns(ListObjectUtilities.GetCellColumn(this.SourceTable, Target))
Case this.SourceTable.DataBodyRange.Rows.Count > this.LastRowCount
OnAddedNewRow SourceTable.ListRows(ListObjectUtilities.GetCellRow(this.SourceTable, Target))
Case Else
OnChanged Target
End Select
Resize
End Sub
Private Property Get ITable_SourceTable() As ListObject
Set ITable_SourceTable = this.SourceTable
End Property
班级:TableManager
'@Folder("VBAProject")
'@PredeclaredId
Option Explicit
Private WithEvents MyTable As Table
Public Property Get TableEvents() As Table
Set TableEvents = MyTable
End Property
Public Property Set TableEvents(ByVal value As Table)
Set MyTable = value
End Property
Private Sub MyTable_AddedNewColumn(ByVal newColumn As ListColumn)
MsgBox "Added new column " & newColumn.Range.Column
End Sub
Private Sub MyTable_AddedNewRow(ByVal newRow As ListRow)
MsgBox "Added new row " & newRow.Range.Row
End Sub
Private Sub MyTable_Changed(ByVal cell As Range)
MsgBox "Changed " & cell.Address
End Sub