PropertyMap.Item[String] 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
获取或设置给定属性的 PropertyTranslator 委托。
public:
property System::Windows::Forms::Integration::PropertyTranslator ^ default[System::String ^] { System::Windows::Forms::Integration::PropertyTranslator ^ get(System::String ^ propertyName); void set(System::String ^ propertyName, System::Windows::Forms::Integration::PropertyTranslator ^ value); };public System.Windows.Forms.Integration.PropertyTranslator this[string propertyName] { get; set; }member this.Item(string) : System.Windows.Forms.Integration.PropertyTranslator with get, setDefault Public Property Item(propertyName As String) As PropertyTranslator参数
- propertyName
- String
要映射的属性的名称。
属性值
PropertyTranslator 委托对应于 propertyName 指定的属性。
例外
propertyName 为 null 或为一个空字符串；指定的 PropertyTranslator 委托为 null。
propertyName 给定的属性不存在于 SourceObject 上。
示例
下面的代码示例演示如何检索PropertyTranslator控件属性的ElementHost委托BackColor。
// The ExtendBackColorMapping method adds a property
// translator if a mapping already exists.
private void ExtendBackColorMapping()
{
if (elemHost.PropertyMap["BackColor"] != null)
{
elemHost.PropertyMap["BackColor"] +=
new PropertyTranslator(OnBackColorChange);
}
}
// The OnBackColorChange method assigns a specific image
// to the hosted element's Background property.
private void OnBackColorChange(object h, String propertyName, object value)
{
ElementHost host = h as ElementHost;
System.Windows.Controls.Button wpfButton =
host.Child as System.Windows.Controls.Button;
ImageBrush b = new ImageBrush(new BitmapImage(
new Uri(@"file:///C:\WINDOWS\Santa Fe Stucco.bmp")));
wpfButton.Background = b;
}
' The ExtendBackColorMapping method adds a property
' translator if a mapping already exists.
Private Sub ExtendBackColorMapping()
If elemHost.PropertyMap("BackColor") IsNot Nothing Then
elemHost.PropertyMap("BackColor") = PropertyTranslator.Combine( _
elemHost.PropertyMap("BackColor"), _
PropertyTranslator.CreateDelegate( _
GetType(PropertyTranslator), _
Me, _
"OnBackColorChange"))
End If
End Sub
' The OnBackColorChange method assigns a specific image
' to the hosted element's Background property.
Private Sub OnBackColorChange( _
ByVal h As Object, _
ByVal propertyName As String, _
ByVal value As Object)
Dim host As ElementHost = h
Dim wpfButton As System.Windows.Controls.Button = host.Child
Dim b As New ImageBrush(New BitmapImage( _
New Uri("file:///C:\WINDOWS\Santa Fe Stucco.bmp")))
wpfButton.Background = b
End Sub
下面的代码示例演示如何检索PropertyTranslator控件属性的WindowsFormsHost委托Background。
// The ExtendBackgroundMapping method adds a property
// translator if a mapping already exists.
private void ExtendBackgroundMapping()
{
if (wfHost.PropertyMap["Background"] != null)
{
wfHost.PropertyMap["Background"] += new PropertyTranslator(OnBackgroundChange);
}
}
// The OnBackgroundChange method assigns a specific image
// to the hosted control's BackgroundImage property.
private void OnBackgroundChange(object h, String propertyName, object value)
{
WindowsFormsHost host = h as WindowsFormsHost;
System.Windows.Forms.CheckBox cb = host.Child as System.Windows.Forms.CheckBox;
ImageBrush b = value as ImageBrush;
if (b != null)
{
cb.BackgroundImage = new System.Drawing.Bitmap(@"C:\WINDOWS\Santa Fe Stucco.bmp");
}
}
' The ExtendBackgroundMapping method adds a property
' translator if a mapping already exists.
Private Sub ExtendBackgroundMapping()
If wfHost.PropertyMap("Background") IsNot Nothing Then
wfHost.PropertyMap("Background") = PropertyTranslator.Combine( _
wfHost.PropertyMap("Background"), _
PropertyTranslator.CreateDelegate( _
GetType(PropertyTranslator), _
Me, _
"OnBackgroundChange"))
End If
End Sub
' The OnBackgroundChange method assigns a specific image
' to the hosted control's BackgroundImage property.
Private Sub OnBackgroundChange(ByVal h As Object, ByVal propertyName As String, ByVal value As Object)
Dim host As WindowsFormsHost = h
Dim cb As System.Windows.Forms.CheckBox = host.Child
Dim b As ImageBrush = value
If Not (b Is Nothing) Then
cb.BackgroundImage = New System.Drawing.Bitmap("C:\WINDOWS\Santa Fe Stucco.bmp")
End If
End Sub
注解
设置时，如果不存在PropertyTranslatorpropertyName，则新委托将添加到该PropertyMap代理中。 PropertyTranslator如果已存在propertyName，则会替换它。