用戶控制列表屬性設計器錯誤

我想添加List（Of Book）屬性到我的用戶控件。我爲CollectionEditor定義了Book類和BookCollectionEditor類。而且我爲我的用戶控件定義了一個名爲BookList的公共屬性。對於自定義控件，它可以正常工作，但對於用戶控件，設計者不顯示我的屬性。在標記上，我可以添加一個Book項目，但是在設計器上會給出錯誤：「Type'System.Web.UI.UserControl'沒有名爲'BookList'的公共屬性。用戶控制列表屬性設計器錯誤

不可能爲用戶控件定義列表屬性嗎？

<TypeConverter(GetType(ExpandableObjectConverter)), Serializable()> _ 
Public Class Book 
    Private _name As String 
    Private _author As String 

    Public Sub New() 
    Me.New(String.Empty, String.Empty) 
    End Sub 

    Public Sub New(ByVal name As String, ByVal author As String) 
    _name = name 
    _author = author 
    End Sub 

    <Category("Book Property"), Description("Name of the Book"), DefaultValue(""), NotifyParentProperty(True)> _ 
    Public Property Name() As String 
    Get 
     Return _name 
    End Get 
    Set(ByVal value As String) 
     _name = value 
    End Set 
    End Property 

    <Category("Book Property"), Description("Author of the Book"), DefaultValue(""), NotifyParentProperty(True)> _ 
    Public Property Author() As String 
    Get 
     Return _author 
    End Get 
    Set(ByVal value As String) 
     _author = value 
    End Set 
    End Property 
End Class 

Public Class BookCollectionEditor 
    Inherits CollectionEditor 

    Public Sub New(ByVal newType As Type) 
    MyBase.new(newType) 
    End Sub 

    Protected Overrides Function CanSelectMultipleInstances() As Boolean 
    Return False 
    End Function 

    Protected Overrides Function CreateCollectionItemType() As Type 
    Return GetType(Book) 
    End Function 
End Class 

Partial Class BooksUserControl 
    Inherits System.Web.UI.UserControl 

    Private _booklist As New List(Of Book) 

    <Category("Behavior"), _ 
    Description("Book List"), _ 
    DesignerSerializationVisibility(DesignerSerializationVisibility.Content), _ 
    NotifyParentProperty(True), _ 
    PersistenceMode(PersistenceMode.InnerProperty), _ 
    Editor(GetType(BookCollectionEditor), GetType(BookCollectionEditor)), _ 
    Browsable(True)> _ 
    Public ReadOnly Property BookList() As List(Of Book) 
    Get 
     If _booklist Is Nothing Then 
     _booklist = New List(Of Book)() 
     End If 
     Return _booklist 
    End Get 
    End Property 
End Class

Default.aspx的

<uc1:BooksUserControl ID="BooksUserControl1" runat="server"> 
    <BookList> 
    </BookList> 
</uc1:BooksUserControl>

來源

2011-11-25 egurer

是的，它可以定義列表（中T）特性。在沒有編輯器設置的情況下嘗試你的代碼，看看問題出在那部分代碼中。

來源

2011-12-06 14:58:49 Mino

但是，如何在沒有編輯器設置的情況下從屬性窗口添加項目？ – egurer

用戶控制列表屬性設計器錯誤

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