Leadtools.Multimedia Namespace > CaptureSubTypes Class > Item Property : Item(Int32) Property |
public CaptureSubType Item( int index ) {get;}
'Declaration Public Overloads ReadOnly Property Item( _ ByVal index As Integer _ ) As CaptureSubType
'Usage Dim instance As CaptureSubTypes Dim index As Integer Dim value As CaptureSubType value = instance.Item(index)
public CaptureSubType Item( int index ) {get;}
get_Item(Int32)();
public: property CaptureSubType^ Item { CaptureSubType^ get(int index); }
Exception | Description |
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System.ArgumentOutOfRangeException | The exception that is thrown when the value of an argument is outside the allowable range of values as defined by the invoked method. |
myCollection[index]
The C# language uses the this keyword to define the indexers instead of implementing the Item property. Visual Basic implements Item as a default property, which provides the same indexing functionality.Public _result As Boolean = False Public _form As CaptureCtrlForm = New CaptureCtrlForm() Public Sub IndexContainsExample() Try ' reference the form capture control Dim capturectrl As CaptureCtrl = _form.CaptureCtrl ' 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 device available") End If capturectrl.VideoDevices("Analog").Selected = True ' reference the video capture subtypes collection Dim stypes As CaptureSubTypes = capturectrl.VideoCaptureSubTypes ' check for RGB24 subtype Dim i As Integer = stypes.IndexOf(Leadtools.Multimedia.Constants.MEDIASUBTYPE_YUY2) ' access the input via the collection indexer Dim cs As CaptureSubType = stypes(i) ' check if the collection contains this subtype ' (it should we just got it with IndexOf above!) If stypes.Contains(cs) Then ' set the result to what we expect _result = True End If Catch e1 As Exception _result = False End Try End Sub
public bool _result = false; public CaptureCtrlForm _form = new CaptureCtrlForm(); public void IndexContainsExample() { try { // reference the form capture control CaptureCtrl capturectrl = _form.CaptureCtrl; // set a video device first. use your video device's name here if (capturectrl.VideoDevices["Analog"] == null) throw new Exception("No Analog video device available"); capturectrl.VideoDevices["Analog"].Selected = true; // reference the video capture subtypes collection CaptureSubTypes stypes = capturectrl.VideoCaptureSubTypes; // check for RGB24 subtype int i = stypes.IndexOf(Constants.MEDIASUBTYPE_YUY2); // access the input via the collection indexer CaptureSubType cs = stypes[i]; // check whether the collection contains this subtype // (it should since we just got it with IndexOf above!) if (stypes.Contains(cs)) { // set the result to what we expect _result = true; } } 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