Gets the number of items contained in the collection.
Syntax
Visual Basic (Declaration) | |
---|
Public ReadOnly Property Count As Integer |
Visual Basic (Usage) | Copy Code |
---|
Dim instance As Devices
Dim value As Integer
value = instance.Count |
C# | |
---|
public int Count {get;} |
C++/CLI | |
---|
public:
property int Count {
int get();
} |
Property Value
The number of items contained in the collection.
Example
Visual Basic | Copy Code |
---|
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public _result As Boolean = False
Public Sub CountResetExample()
Try
' reference the form capture control and it's video inputs
Dim capturectrl As CaptureCtrl = _form.CaptureCtrl
Dim devices As Devices = capturectrl.VideoDevices
' get count before setting device
Dim n As Integer = devices.Count
' set a video device first, you should use your video device name here
If capturectrl.VideoDevices("Analog") Is Nothing Then
Throw New Exception("No Analog video tuner device available")
End If
capturectrl.VideoDevices("Analog").Selected = True
' get count after setting device
Dim m As Integer = devices.Count
' reset the collection
devices.Reset()
' set out result to what we expect
_result = (m = n)
Catch e1 As Exception
_result = False
End Try
End Sub |
C# | Copy Code |
---|
public CaptureCtrlForm _form = new CaptureCtrlForm();
public bool _result = false;
public void CountResetExample()
{
try
{
// reference the form capture control and it's video inputs
CaptureCtrl capturectrl = _form.CaptureCtrl;
Devices devices = capturectrl.VideoDevices;
// get count before setting device
int n = devices.Count;
// set a video device first, you should use your video device name here
if (capturectrl.VideoDevices["Analog"] == null)
throw new Exception("No Analog video tuner device available");
capturectrl.VideoDevices["Analog"].Selected = true;
// get count after setting device
int m = devices.Count;
// reset the collection
devices.Reset();
// set out result to what we expect
_result = (m == n);
}
catch (Exception)
{
_result = false;
}
} |
Requirements
Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7
See Also