PropertyInfo.CanRead Property
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Gets a value indicating whether the property can be read.
Namespace: System.Reflection
Assembly: mscorlib (in mscorlib.dll)
Syntax
Public MustOverride ReadOnly Property CanRead As Boolean
public abstract bool CanRead { get; }
Property Value
Type: System..::.Boolean
true if this property can be read; otherwise, false.
Remarks
If the property does not have a get accessor, it cannot be read.
To get the CanRead property, first get the class Type. From the Type, get the PropertyInfo. From the PropertyInfo, get the CanRead value.
Examples
The following example defines two properties. The first property is readable, and the CanRead property is true. The second property is not readable (there is no get accessor), and the CanRead property is false.
Note
To run this example, see Building examples that have static TextBlock controls for Windows Phone 8.
Imports System.Reflection
Class Example
' Define one readable property and one that is not readable.
Private _caption As String = "A Default Caption"
Public Property Caption() As String
Get
Return _caption
End Get
Set(ByVal Value As String)
If _caption <> Value Then
_caption = Value
End If
End Set
End Property
Private _text As String = "Default text"
Public WriteOnly Property Text() As String
Set(ByVal Value As String)
If _text <> Value Then
_text = Value
End If
End Set
End Property
Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
outputBlock.Text &= "Reflection.PropertyInfo.CanRead" & vbLf & vbLf
Dim ex As New Example()
outputBlock.Text &= "Caption = " & ex.Caption & vbLf
' The Text property cannot be read because it has no get accessor. The
' following line of code causes a compile error:
'outputBlock.Text &= "Text = " & ex.Text & vbLf
Dim captionInfo As PropertyInfo = GetType(Example).GetProperty("Caption")
Dim textInfo As PropertyInfo = GetType(Example).GetProperty("Text")
' Display the CanRead properties.
outputBlock.Text &= "CanRead for the Caption property: " & _
captionInfo.CanRead & vbLf
outputBlock.Text &= "CanRead for the Text property: " & _
textInfo.CanRead & vbLf
End Sub
End Class
' This example produces the following output:
'
'Reflection.PropertyInfo.CanRead
'
'Caption = A Default Caption
'CanRead for the Caption property: True
'CanRead for the Text property: False
using System;
using System.Reflection;
class Example
{
// Define one readable property and one that is not readable.
private string _caption = "A Default Caption";
public string Caption
{
get
{
return _caption;
}
set
{
if (_caption!=value)
{
_caption = value;
}
}
}
private string _text = "Default text";
public string Text
{
set
{
if (_text!=value)
{
_text = value;
}
}
}
public static void Demo(System.Windows.Controls.TextBlock outputBlock)
{
outputBlock.Text += "Reflection.PropertyInfo.CanRead\n\n";
Example ex = new Example();
outputBlock.Text += "Caption = " + ex.Caption + "\n";
// The Text property cannot be read because it has no get accessor. The
// following line of code causes a compile error:
//outputBlock.Text += "Text = " + ex.Text + "\n";
PropertyInfo captionInfo = typeof(Example).GetProperty("Caption");
PropertyInfo textInfo = typeof(Example).GetProperty("Text");
// Display the CanRead properties.
outputBlock.Text +=
"CanRead for the Caption property: " + captionInfo.CanRead + "\n";
outputBlock.Text +=
"CanRead for the Text property: " + textInfo.CanRead + "\n";
}
}
/* This example produces the following output:
Reflection.PropertyInfo.CanRead
Caption = A Default Caption
CanRead for the Caption property: True
CanRead for the Text property: False
*/
Version Information
Windows Phone OS
Supported in: 8.1, 8.0, 7.1, 7.0
Platforms
Windows Phone