EditGraph Method (CaptureCtrl)

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

public virtual void EditGraph()

'Declaration
 
Public Overridable Sub EditGraph()

'Usage
 
Dim instance As CaptureCtrl
 
instance.EditGraph()

public virtual void EditGraph()

 function Leadtools.Multimedia.CaptureCtrl.EditGraph()

public:
virtual void EditGraph();

This method will display a modal dialog box indicating that the graph has been registered. The current thread is suspended during this time. The toolkit then attempts to invoke the GraphEdit utility from the DirectShow SDK. You can use GraphEdit's "Connect" menu option to view the registered graph. When done, exit GraphEdit, and click on the dialog's OK button to continue program execution.

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 _capturectrl As CaptureCtrl
      Public Sub EditGraphExample()
         ' reference the capture control
         _capturectrl = _form.CaptureCtrl

         ' output file names
         Dim outFile As String = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_EditGraphExample.mpg")

         Try
            ' set the source video device, select using 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

            ' select a video compressor
            _capturectrl.VideoCompressors.Mpeg4.Selected = True

            ' set the target file
            _capturectrl.TargetFile = outFile

            ' register the graph for GraphEdit 
            ' you should see a message box that says the graph is registered 
            ' once this message displays you can open GraphEdit and Connect to Remote Graph
            _capturectrl.EditGraph()

            ' set the started event handler
            AddHandler _capturectrl.Started, AddressOf CaptureCtrl_Started

            ' run the capture
            _capturectrl.StartCapture(CaptureMode.Video)

            ' set the result
            _result = True
         Catch e1 As Exception
            _result = False
         End Try

         ' we'll loop on the state and pump messages for this example.
         ' but you should not need to if running from a Windows Forms application.
         Do While _capturectrl.State = CaptureState.Running
            Application.DoEvents()
         Loop
      End Sub

      Private Sub CaptureCtrl_Started(ByVal sender As Object, ByVal e As EventArgs)
         ' stop the capture (we don't need a complete capture for this example)
         _capturectrl.StopCapture()
      End Sub

Public NotInheritable Class LEAD_VARS
   Public Const MediaDir As String = "C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 175\Media";
End Class

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

         // output file names
         string outFile = Path.Combine(LEAD_VARS.MediaDir,"CaptureCtrl_EditGraphExample.mpg");

         try
         {
            // set the source video device, select using your device name here
            if (_capturectrl.VideoDevices["USB"] == null)
               throw new Exception("No USB video device available");

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

            // select a video compressor
            _capturectrl.VideoCompressors.Mpeg4.Selected = true;

            // set the target file
            _capturectrl.TargetFile = outFile;

            // register the graph for GraphEdit 
            // you should see a message box that says the graph is registered 
            // once this message displays you can open GraphEdit and Connect to Remote Graph
            _capturectrl.EditGraph();

            // set the started event handler
            _capturectrl.Started += new EventHandler(CaptureCtrl_Started);

            // run the capture
            _capturectrl.StartCapture(CaptureMode.Video);

            // set the result
            _result = true;
         }
         catch (Exception)
         {
            _result = false;
         }

         // we'll loop on the state and pump messages for this example.
         // but you should not need to if running from a Windows Forms application.
         while (_capturectrl.State == CaptureState.Running)
            Application.DoEvents();
      }

      void CaptureCtrl_Started(object sender, EventArgs e)
      {
         // stop the capture (we do not need a complete capture for this example)
         _capturectrl.StopCapture();
      }

static class LEAD_VARS
{
   public const string MediaDir = @"C:\Program Files (x86)\LEAD Technologies\LEADTOOLS 175\Media";
}

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

CaptureCtrl Class
CaptureCtrl Members