NotifyParentPropertyAttribute(Boolean) Konstruktor
Definisi
Penting
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Menginisialisasi instans NotifyParentPropertyAttribute baru kelas, menggunakan nilai yang ditentukan untuk menentukan apakah properti induk diberi tahu tentang perubahan pada nilai properti.
public:
NotifyParentPropertyAttribute(bool notifyParent);
public NotifyParentPropertyAttribute (bool notifyParent);
new System.ComponentModel.NotifyParentPropertyAttribute : bool -> System.ComponentModel.NotifyParentPropertyAttribute
Public Sub New (notifyParent As Boolean)
Parameter
- notifyParent
- Boolean
true
jika induk harus diberi tahu tentang perubahan; jika tidak, false
.
Contoh
Contoh kode berikut menunjukkan cara menggunakan NotifyParentPropertyAttribute kelas dan ExpandableObjectConverter untuk membuat properti yang dapat diperluas pada kontrol kustom.
[TypeConverter(typeof(BorderAppearanceConverter))]
public class BorderAppearance
{
private int borderSizeValue = 1;
private Color borderColorValue = Color.Empty;
[Browsable(true),
NotifyParentProperty(true),
EditorBrowsable(EditorBrowsableState.Always),
DefaultValue(1)]
public int BorderSize
{
get
{
return borderSizeValue;
}
set
{
if (value < 0)
{
throw new ArgumentOutOfRangeException(
"BorderSize",
value,
"must be >= 0");
}
if (borderSizeValue != value)
{
borderSizeValue = value;
}
}
}
[Browsable(true)]
[NotifyParentProperty(true)]
[EditorBrowsable(EditorBrowsableState.Always)]
[DefaultValue(typeof(Color), "")]
public Color BorderColor
{
get
{
return borderColorValue;
}
set
{
if (value.Equals(Color.Transparent))
{
throw new NotSupportedException("Transparent colors are not supported.");
}
if (borderColorValue != value)
{
borderColorValue = value;
}
}
}
}
<TypeConverter(GetType(BorderAppearanceConverter))> _
Public Class BorderAppearance
Private borderSizeValue As Integer = 1
Private borderColorValue As Color = Color.Empty
<Browsable(True), NotifyParentProperty(True), EditorBrowsable(EditorBrowsableState.Always), DefaultValue(1)> _
Public Property BorderSize() As Integer
Get
Return borderSizeValue
End Get
Set
If value < 0 Then
Throw New ArgumentOutOfRangeException("BorderSize", value, "must be >= 0")
End If
If borderSizeValue <> value Then
borderSizeValue = value
End If
End Set
End Property
<Browsable(True), NotifyParentProperty(True), EditorBrowsable(EditorBrowsableState.Always), DefaultValue(GetType(Color), "")> _
Public Property BorderColor() As Color
Get
Return borderColorValue
End Get
Set
If value.Equals(Color.Transparent) Then
Throw New NotSupportedException("Transparent colors are not supported.")
End If
If borderColorValue <> value Then
borderColorValue = value
End If
End Set
End Property
End Class