當前位置: 首頁>>代碼示例>>VB.NET>>正文


VB.NET PropertyTab類代碼示例

本文整理匯總了VB.NET中System.Windows.Forms.Design.PropertyTab的典型用法代碼示例。如果您正苦於以下問題:VB.NET PropertyTab類的具體用法?VB.NET PropertyTab怎麽用?VB.NET PropertyTab使用的例子?那麽, 這裏精選的類代碼示例或許可以為您提供幫助。


在下文中一共展示了PropertyTab類的1個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的VB.NET代碼示例。

示例1: TypeCategoryTabComponent

' 導入命名空間
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Drawing
Imports System.IO
Imports System.Reflection
Imports System.Runtime.Serialization
Imports System.Runtime.Serialization.Formatters.Binary
Imports System.Windows.Forms
Imports System.Windows.Forms.Design

' This component adds a TypeCategoryTab to the property browser
' that is available for any components in the current design mode document.
<PropertyTabAttribute(GetType(TypeCategoryTab), PropertyTabScope.Document)>  _
Public Class TypeCategoryTabComponent
   Inherits System.ComponentModel.Component
   
   Public Sub New()
    End Sub
End Class

' A TypeCategoryTab property tab lists properties by the 
' category of the type of each property.
<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Public Class TypeCategoryTab
    Inherits PropertyTab

    ' This string contains a Base-64 encoded and serialized example property tab image.
    <BrowsableAttribute(True)> _
    Private img As String = "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"

    Public Sub New()
    End Sub

    ' Returns the properties of the specified component extended with 
    ' a CategoryAttribute reflecting the name of the type of the property.
    Public Overloads Overrides Function GetProperties(ByVal component As Object, ByVal attributes() As System.Attribute) As System.ComponentModel.PropertyDescriptorCollection
        Dim props As PropertyDescriptorCollection
        If attributes Is Nothing Then
            props = TypeDescriptor.GetProperties(component)
        Else
            props = TypeDescriptor.GetProperties(component, attributes)
        End If
        Dim propArray(props.Count - 1) As PropertyDescriptor
        Dim i As Integer
        For i = 0 To props.Count - 1
            ' Create a new PropertyDescriptor from the old one, with 
            ' a CategoryAttribute matching the name of the type.
            propArray(i) = TypeDescriptor.CreateProperty(props(i).ComponentType, props(i), New CategoryAttribute(props(i).PropertyType.Name))
        Next i
        Return New PropertyDescriptorCollection(propArray)
    End Function

    Public Overloads Overrides Function GetProperties(ByVal component As Object) As System.ComponentModel.PropertyDescriptorCollection
        Return Me.GetProperties(component, Nothing)
    End Function

    ' Provides the name for the property tab.
    Public Overrides ReadOnly Property TabName() As String
        Get
            Return "Properties by Type"
        End Get
    End Property

    ' Provides an image for the property tab.
    Public Overrides ReadOnly Property Bitmap() As System.Drawing.Bitmap
        Get
            Dim bmp As New Bitmap(DeserializeFromBase64Text(img))
            Return bmp
        End Get
    End Property

    ' This method can be used to retrieve an Image from a block of Base64-encoded text.
    Private Function DeserializeFromBase64Text(ByVal [text] As String) As Image
        Dim img As Image = Nothing
        Dim memBytes As Byte() = Convert.FromBase64String([text])
        Dim formatter As New BinaryFormatter()
        Dim stream As New MemoryStream(memBytes)
        img = CType(formatter.Deserialize(stream), Image)
        stream.Close()
        Return img
    End Function
End Class
開發者ID:VB.NET開發者,項目名稱:System.Windows.Forms.Design,代碼行數:83,代碼來源:PropertyTab


注:本文中的System.Windows.Forms.Design.PropertyTab類示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台,相關代碼片段篩選自各路編程大神貢獻的開源項目,源碼版權歸原作者所有,傳播和使用請參考對應項目的License;未經允許,請勿轉載。