ZoomInfo Property

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public CameraControlInfo ZoomInfo {get;}

'Declaration
 
Public ReadOnly Property ZoomInfo As CameraControlInfo

'Usage
 
Dim instance As CameraControl
Dim value As CameraControlInfo
 
value = instance.ZoomInfo

public CameraControlInfo ZoomInfo {get;}

 get_ZoomInfo();

public:
property CameraControlInfo^ ZoomInfo {
   CameraControlInfo^ get();
}

Property Value

A CameraControlInfo object.

The information returned for this property is a CameraControlInfo object containing all the related property information.

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public Sub CameraControlExample()
  ' reference the capture control
  Dim capturectrl As CaptureCtrl = _form.CaptureCtrl

  Try
     ' try to find a USB video device, use your device name here
     If capturectrl.VideoDevices("USB") Is Nothing Then
       Throw New Exception("No USB video device available")
     End If

     capturectrl.VideoDevices("USB").Selected = True

     ' reference the camera control
     Dim camera As CameraControl = capturectrl.CameraControl

     If Not camera Is Nothing Then
       ' try to set some camera auto properties
       camera.AutoExposure = True
       camera.AutoFocus = True
       camera.AutoIris = True
       camera.AutoPan = False
       camera.AutoRoll = False
       camera.AutoTilt = False
       camera.AutoZoom = True

       ' now try to set some camera manual properties
       camera.Exposure = camera.ExposureInfo.Min
       camera.Focus = camera.FocusInfo.Max
       camera.Iris = camera.IrisInfo.Default
       camera.Pan = camera.PanInfo.Min
       camera.Roll = camera.RollInfo.Min
       camera.Tilt = camera.TiltInfo.Min
       camera.Zoom = camera.ZoomInfo.Min

       ' now increment a property by the stepping delta
       camera.Exposure += camera.ExposureInfo.StepDelta

       ' set the result to what we expect
       _result = (camera.Exposure = camera.ExposureInfo.Min + camera.ExposureInfo.StepDelta)

       ' now check a property to see if it is supported and has a manual setting
       ' if so, set it to auto
       If camera.ExposureInfo.Flags <> CameraControlFlags.Unsupported AndAlso camera.ExposureInfo.Flags = CameraControlFlags.Manual Then
         camera.AutoExposure = True
       End If

       ' set the result to what we expect
       _result = _result And (camera.ExposureInfo.Flags = CameraControlFlags.Auto)
     End If

     ' continue setting capture settings
     ' and possibly start a capture process
     ' ...
  Catch e1 As Exception
     _result = False
  End Try
End Sub

public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void CameraControlExample()
{
   // reference the capture control
   CaptureCtrl capturectrl = _form.CaptureCtrl;

   try
   {
      // try to find a USB video device. use your device's name here
      if (capturectrl.VideoDevices["USB"] == null)
         throw new Exception("No USB video device available");

      capturectrl.VideoDevices["USB"].Selected = true;

      // reference the camera control
      CameraControl camera = capturectrl.CameraControl;

      if (camera != null)
      {
         // try to set some camera auto properties
         camera.AutoExposure = true;
         camera.AutoFocus = true;
         camera.AutoIris = true;
         camera.AutoPan = false;
         camera.AutoRoll = false;
         camera.AutoTilt = false;
         camera.AutoZoom = true;

         // now try to set some camera manual properties
         camera.Exposure = camera.ExposureInfo.Min;
         camera.Focus = camera.FocusInfo.Max;
         camera.Iris = camera.IrisInfo.Default;
         camera.Pan = camera.PanInfo.Min;
         camera.Roll = camera.RollInfo.Min;
         camera.Tilt = camera.TiltInfo.Min;
         camera.Zoom = camera.ZoomInfo.Min;

         // now increment a property by the stepping delta
         camera.Exposure += camera.ExposureInfo.StepDelta;

         // set the result to what we expect
         _result = (camera.Exposure == camera.ExposureInfo.Min + camera.ExposureInfo.StepDelta);

         // now check a property to see if it is supported and has a manual setting
         // if so, set it to auto
         if (camera.ExposureInfo.Flags != CameraControlFlags.Unsupported
            && camera.ExposureInfo.Flags == CameraControlFlags.Manual)
            camera.AutoExposure = true;

         // set the result to what we expect
         _result &= (camera.ExposureInfo.Flags == CameraControlFlags.Auto);
      }

      // continue setting capture settings
      // and possibly start a capture process
      // ...
   }
   catch (Exception)
   {
      _result = false;
   }
}

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

CameraControl Class
CameraControl Members