我正在尝试构建一个表单。我想要多个复选框来将文本添加到文本框中。我无法做到这一点，没有定义太多！我在最初的场景中使用了3个复选框。现在我必须使用12个复选框。我想知道是否有一种更简单的方法来构建它。
休耕展示了我对原版3的习惯。我真的很感激你的帮助，这样我在接下来的12年里就不用这么做了，这将是一个很大的收获！提前谢谢！
Private Sub SUE_Click()
If SUE.value = True And SUD.value = False And SUG.value = False Then
StartUp.Value = "E DEGD"
Else
If SUD.value = True And SUE.value = False And SUG.value = False Then
StartUp.Value = "D DEGD"
Else
If SUG.value = True And SUD.value = False And SUE.value = False Then
StartUp.Value = "G DEGD"
Else
If SUD.value And SUE.value And SUG.value = True Then
StartUp.Value = "D DEGD, E DEGD, G ALT DEGD"
Else
If SUD.value And SUE.value = True Then
StartUp.Value = "D DEGD, E DEGD"
Else
If SUE.value And SUG.value = True Then
StartUp.Value = "E DEGD, G ALT DEGD"
Else
If SUD.value And SUG.value = True Then
StartUp.Value = "D DEGD, G ALT DEGD"
Else
If SUE.value = False Then
StartUp.Value = ""
Else
If SUD.value = False Then
StartUp.Value = ""
Else
If SUG.value = False Then
StartUp.Value = ""
End If
End If
End If
End If
End If
End If
End If
End If
End If
End If
End Sub
我真的不认为这是一条路。每次需要添加复选框时，您都会得到大量的代码行。
对于以下内容，您唯一需要做的就是：
- 使用所需的所有复选框创建用户表单(跟踪标题(
- 总之，根据需要创建尽可能多的字符串提供程序对象(可能是复选框的数量(，为它们提供所需的字符串和链接到的复选框的标题
- 向字符串生成器注册字符串提供程序
- 为表单提供字符串生成器
您需要做的是：
- 创建StringProvider类(您需要创建一个类模块(作为遵循
这是一个非常简单的类，包含3条信息：
- 要生成的字符串
- 启用/禁用状态
- 链接到的复选框的标题(区分大小写(
这个对象被设计用来存储您想要作为输出的字符串值，例如"；E DEGD'；，以及链接到它的复选框(例如代码中的"SUE"、"SUD"(的名称(实际上是标题(。
Option Explicit
Private Type TValueProvider
value As String
IsEnabled As Boolean
LinkledTB As String
End Type
Private this As TValueProvider
Public Property Get value() As String
value = this.value
End Property
Public Property Let value(v As String)
this.value = v
End Property
Public Property Get IsEnabled() As Boolean
IsEnabled = this.IsEnabled
End Property
Public Property Let IsEnabled(b As Boolean)
this.IsEnabled = b
End Property
Public Property Get LinkedTB() As String
LinkedTB = this.LinkledTB
End Property
Public Property Let LinkedTB(textboxname As String)
this.LinkledTB = textboxname
End Property
- 一个字符串生成器类，具有以下代码：这个类将存储所有字符串提供程序对象。调用时，UpdateString((子将a(遍历已注册的字符串提供程序(按添加顺序(，并触发StringUpdated事件，该事件用于通知UserForm字符串已更新，并且需要显示它
Option Explicit
Private Type TStringBuilder
stringproviders As Collection
End Type
Public Event StringUpdated(newstring As String)
Private this As TStringBuilder
Private Sub class_initialize()
Set this.stringproviders = New Collection
End Sub
Public Sub UpdateString()
Dim k As Variant
Dim sp As StringProvider
Dim arr() As String
Dim i As Long
Dim EnabledStringProviders As Collection
Set EnabledStringProviders = New Collection
For Each k In this.stringproviders
Set sp = k
If sp.IsEnabled Then
EnabledStringProviders.Add sp
End If
Next k
If EnabledStringProviders.Count = 0 Then
RaiseEvent StringUpdated(vbNullString)
Else
ReDim arr(EnabledStringProviders.Count - 1)
For Each k In EnabledStringProviders
Set sp = k
arr(i) = sp.value
i = i + 1
Next k
RaiseEvent StringUpdated(Join(arr, ", "))
End If
End Sub
Public Sub RegisterStringProvider(sp As StringProvider)
this.stringproviders.Add sp
End Sub
Public Function getSringProviderFromTBName(name As String)
Dim sp As StringProvider
Dim k As Variant
For Each k In this.stringproviders
Set sp = k
If sp.LinkedTB = name Then
Set getSringProviderFromTBName = sp
Exit Function
End If
Next k
Err.Raise vbObjectError + 1, , "Could not find stringprovider with name: " & name
End Function
这将容纳字符串提供程序的集合。当调用UpdateString((时，它将遍历字符串提供程序，并在更新后检索它们的值。
- 您还需要checkbox对象的包装器，它看起来像这样：
Option Explicit
Private WithEvents WrappedTB As MSForms.CheckBox
Private pstringbuilder As stringbuilder
Public Sub Initialize(ByVal tb As MSForms.CheckBox, sb As stringbuilder)
Set WrappedTB = tb
Set pstringbuilder = sb
End Sub
Private Sub wrappedTB_Change()
Dim sp As StringProvider
Set sp = pstringbuilder.getSringProviderFromTBName(WrappedTB.Caption)
sp.IsEnabled = WrappedTB.value
pstringbuilder.UpdateString
End Sub
此包装器的作用是捕获Checkbox_change事件。每当复选框更改状态时，就会调用wrappedTB_Change((子。它从字符串生成器请求链接到复选框的字符串提供程序，然后调用字符串生成器对象的UpdateString方法。请注意，字符串生成器保留对字符串提供程序的引用，因此对字符串提供器的更新会自动反映在字符串生成器中。
- 您的表单应该如下所示：
Option Explicit
Private WithEvents pstringbuilder As stringbuilder
Private wrappers As Collection
Private Sub UserForm_initialize()
Set wrappers = New Collection
End Sub
Public Sub ShowDialog(sb As stringbuilder)
Dim wrapper As ChkBoxWrapper
Dim c As Control
Set pstringbuilder = sb
' This code discovers how many checkboxes you have in the userform, and creates one
' wrapper per checkbox. It supplies each wrapper with the same stringbuilder object
' the wrappers are then stored in the wrappers collection.
' That way you don't need to know how many checkboxes there are at compile time.
For Each c In Me.Controls
Set wrapper = New ChkBoxWrapper
If TypeName(c) = "CheckBox" Then
wrapper.Initialize c, sb
wrappers.Add wrapper
End If
Next c
Me.Show
End Sub
Private Sub pstringbuilder_StringUpdated(s As String)
' This handles the event from the stringbuilder object.
TextBox1.value = s
End Sub
作为一个使用示例，这是模块1:
Public Sub main()
Dim frm As UserForm1
Set frm = New UserForm1
Dim sp1 As StringProvider
Dim sp2 As StringProvider
Set sp1 = StringProviderFactory("Toto", "CheckBox1") ' This is where you associate the string you want to output with the checkbox Caption
Set sp2 = StringProviderFactory("Titi", "CheckBox2")
Dim sb As stringbuilder
Set sb = New stringbuilder
' Then you register each stringprovider with the stringbuilder.
sb.RegisterStringProvider sp1
sb.RegisterStringProvider sp2
frm.ShowDialog sb
End Sub
Private Function StringProviderFactory(value As String, linked_TB_name As String) As StringProvider
' Just a helper function to create stringproviders
Dim sp As StringProvider
Set sp = New StringProvider
sp.value = value
sp.LinkedTB = linked_TB_name
Set StringProviderFactory = sp
End Function
我希望这能有所帮助。代码可以有很大的改进，但希望这能让你开始。