Queries whether the specified property dialog for the caching filter is available.
Syntax
Parameters
- Dialog
- Value that specifies which dialog to display. Must be one of the TargetFormatDlg constants.
Return Value
System.Boolean
Example
Visual Basic | Copy Code |
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Public _result As Boolean = False
Public _form As CaptureCtrlForm = New CaptureCtrlForm()
Public Sub HasCacheDialogExample()
' reference the capture control
Dim capturectrl As CaptureCtrl = _form.CaptureCtrl
Try
' 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 audio device available")
End If
capturectrl.VideoDevices("Analog").Selected = True
' set the video compressor
capturectrl.VideoCompressors.Mpeg2.Selected = True
' reference the target formats collection
Dim fmt As TargetFormat = capturectrl.TargetFormats.MPEG2Program
' enumerate through the list of formats
For Each af As TargetFormat In capturectrl.TargetFormats
' check the formats valid compressor and stream type
Dim isValid As Boolean = (af.IsValidCompressor(capturectrl.VideoCompressors.Mpeg2.Name) = TargetFormatCompressor.Valid)
Dim types As StreamFormatType = af.Streams
' if valid, select it
If isValid AndAlso ((types And StreamFormatType.Video) = StreamFormatType.Video) Then
fmt = af
fmt.Selected = True
Exit For
End If
Next af
' check to see if the current target format has a cache dialog
If Not fmt Is Nothing AndAlso fmt.HasCacheDialog(TargetFormatDlg.VideoCompressor) Then
' show the dialog
fmt.ShowCacheDialog(TargetFormatDlg.VideoCompressor, _form)
' set the result
_result = True
End If
Catch e1 As Exception
_result = False
End Try
End Sub |
C# | Copy Code |
---|
public bool _result = false;
public CaptureCtrlForm _form = new CaptureCtrlForm();
public void HasCacheDialogExample()
{
// reference the capture control
CaptureCtrl capturectrl = _form.CaptureCtrl;
try
{
// set a video device first, you should use your video device name here
if (capturectrl.VideoDevices["Analog"] == null)
throw new Exception("No Analog audio device available");
capturectrl.VideoDevices["Analog"].Selected = true;
// set the video compressor
capturectrl.VideoCompressors.Mpeg2.Selected = true;
// reference the target formats collection
TargetFormat fmt = capturectrl.TargetFormats.MPEG2Program;
// enumerate through the list of formats
foreach (TargetFormat af in capturectrl.TargetFormats)
{
// check the formats valid compressor and stream type
bool isValid = (af.IsValidCompressor(capturectrl.VideoCompressors.Mpeg2.Name) == TargetFormatCompressor.Valid);
StreamFormatType types = af.Streams;
// if valid, select it
if (isValid && ((types & StreamFormatType.Video) == StreamFormatType.Video))
{
fmt = af;
fmt.Selected = true;
break;
}
}
// check to see if the current target format has a cache dialog
if (fmt != null && fmt.HasCacheDialog(TargetFormatDlg.VideoCompressor))
{
// show the dialog
fmt.ShowCacheDialog(TargetFormatDlg.VideoCompressor, _form);
// set the result
_result = true;
}
}
catch (Exception)
{
_result = false;
}
} |
Remarks
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