在usercontrol里定义了一个集合类colgroup
属性放在clsgroup类里
ADD,Remove,itme等在Colgroup集合类colgroup里现在要在控件里定义Colgroup为控件的一个group属性
想以后使用时就是usercontrol.group.add group.remove定义如下:'缺省属性值:
Const m_def_Group = 0'属性变量:
Dim m_Group As Variant'从存贮器中加载属性值
Private Sub UserControl_ReadProperties(PropBag As PropertyBag)
m_Group = PropBag.ReadProperty("Group", m_def_Group)
End Sub'将属性值写到存储器
Private Sub UserControl_WriteProperties(PropBag As PropertyBag)
Call PropBag.WriteProperty("Group", m_Group, m_def_Group)
End Sub'注意!不要删除或修改下列被注释的行!
'MemberInfo=14,0,0,0
Public Property Get Group() As ColGroup
Group = m_Group
End PropertyPublic Property Let Group(ByVal New_Group As ColGroup)
m_Group = New_Group
PropertyChanged "Group"
End Property但运行到GeT属性时
Group = m_Group出错,说属性的使用无效请问应该怎样定义啊,哪里错了
属性放在clsgroup类里
ADD,Remove,itme等在Colgroup集合类colgroup里现在要在控件里定义Colgroup为控件的一个group属性
想以后使用时就是usercontrol.group.add group.remove定义如下:'缺省属性值:
Const m_def_Group = 0'属性变量:
Dim m_Group As Variant'从存贮器中加载属性值
Private Sub UserControl_ReadProperties(PropBag As PropertyBag)
m_Group = PropBag.ReadProperty("Group", m_def_Group)
End Sub'将属性值写到存储器
Private Sub UserControl_WriteProperties(PropBag As PropertyBag)
Call PropBag.WriteProperty("Group", m_Group, m_def_Group)
End Sub'注意!不要删除或修改下列被注释的行!
'MemberInfo=14,0,0,0
Public Property Get Group() As ColGroup
Group = m_Group
End PropertyPublic Property Let Group(ByVal New_Group As ColGroup)
m_Group = New_Group
PropertyChanged "Group"
End Property但运行到GeT属性时
Group = m_Group出错,说属性的使用无效请问应该怎样定义啊,哪里错了
'MemberInfo=14,0,0,0
Public Property Get Group() As ColGroup
Group = m_Group
End PropertyPublic Property Let Group(ByVal New_Group As ColGroup)
m_Group = New_Group
PropertyChanged "Group"
End Property
------------------------
更改如下
Public Property Get Group() As ColGroup
Set Group = m_Group
End PropertyPublic Property Let Group(ByVal New_Group As ColGroup)
Set m_Group = New_Group
PropertyChanged "Group"
End Property
缺省属性值:
Const m_def_Group = 0为什么用这个SET啊
Public Property Let Group(ByVal New_Group As ColGroup)
Set m_Group = New_Group
PropertyChanged "Group"
End Property
可以改成这样吗?Public Property set Group(ByVal New_Group As ColGroup)
m_Group = New_Group
PropertyChanged "Group"
End Property
-------------------------------------
对于对象而言,它的初始值是Nothing,不是0
'将属性值写到存储器
Private Sub UserControl_WriteProperties(PropBag As PropertyBag)
Call PropBag.WriteProperty("Group", m_Group, Nothing)
End Sub
'从存贮器中加载属性值
Private Sub UserControl_ReadProperties(PropBag As PropertyBag)
Set m_Group= PropBag.ReadProperty("Group", Nothing)
End Sub缺省属性值:
Const m_def_Group = 0
----------------------------
对于Object对象,不能使用Const语句可以改成这样吗?
Public Property set Group(ByVal New_Group As ColGroup)
m_Group = New_Group
PropertyChanged "Group"
End Property
---------------------------------------
不能,因为VB6.0中,对对象的赋值必须使用Set语句。