CheckConnection Method

Visual Basic
C#
C++/CLI

'Declaration
 
<DispIdAttribute(1)>
Sub CheckConnection( _
   ByVal URL As String, _
   ByVal Flags As Integer, _
   ByVal Timeout As Integer _
)

'Usage
 
Dim instance As ILMNetSrc
Dim URL As String
Dim Flags As Integer
Dim Timeout As Integer
 
instance.CheckConnection(URL, Flags, Timeout)

[DispIdAttribute(1)]
void CheckConnection( 
   string URL,
   int Flags,
   int Timeout
)

[DispIdAttribute(1)]
void CheckConnection( 
   String^ URL,
   int Flags,
   int Timeout
)

Parameters

URL

A System.String that contains the server address to be checked.

Flags

Value that indicates whether the method should negotiate the user name and password. Possible values are:

Value	Meaning
0	Do not negotiate the user name and password.
NetSrc_CC_ForceConnection	Negotiate the user name and password.

Timeout

Value that represents the amount of time, in milliseconds, to wait for the connection check before failing.

Return Value

S_OK if the function was successful.

<>S_OK if an error occurred. Refer to the Error Codes or the HRESULT error codes in the DirectShow documentation.

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

Copy Code

Imports Leadtools
Imports Leadtools.Multimedia
Imports LeadtoolsMultimediaExamples.Fixtures

Public _result As Boolean = False
Public _serverAndClient As CaptureAndPlayCtrlForm = New CaptureAndPlayCtrlForm()
Private _msgSent As Boolean = False
Private _captureCtrl As CaptureCtrl
Private _playCtrl As PlayCtrl

Private Const _networkUrl As String = "ltsf://127.0.0.1:27015" ' network stream url
Private Const _testMessage As String = "LEAD NETWORK"

Public Sub NetworkSourceExample()
  ' reference the capture control
  _captureCtrl = _serverAndClient.CaptureCtrl

  ' reference the play control
  _playCtrl = _serverAndClient.PlayCtrl

  Try
     ' try to find a video camera
     If _captureCtrl.VideoDevices("Logitech") Is Nothing Then
       Throw New Exception("No Logitech video device available")
     End If

     _captureCtrl.VideoDevices("Logitech").Selected = True

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

     ' set the target output file
     _captureCtrl.TargetFormat = TargetFormatType.NET
     _captureCtrl.TargetFile = _networkUrl

     If _captureCtrl.IsModeAvailable(CaptureMode.Video) Then
       ' just 10 seconds of capture time
       _captureCtrl.TimeLimit = 10
       _captureCtrl.UseTimeLimit = True

       _captureCtrl.FrameRate = 30
       _captureCtrl.UseFrameRate = True

       _captureCtrl.Preview = True

       ' subscribe to the started and progress events for this example
       ' we will connect a client after the capture starts
       AddHandler _captureCtrl.Started, AddressOf CaptureCtrl_Started

       ' ready the capture graph in order to get the LNMetMux instance
       _captureCtrl.ReadyCapture(CaptureMode.Video)

       ' start capture
       _captureCtrl.StartCapture(CaptureMode.Video)

       ' 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 OrElse _playCtrl.State = PlayState.Running
         Application.DoEvents()
       Loop
     End If
  Catch e1 As Exception
     _result = False
  End Try
End Sub

Private Sub CaptureCtrl_Started(ByVal sender As Object, ByVal e As EventArgs)
  StartClient()
End Sub

Private Sub StartClient()
  Try
     Dim netSrc As LMNetSrc = New LMNetSrc()
     netSrc.CheckConnection(_networkUrl, 0, 5000)
     _result = True
     Marshal.ReleaseComObject(netSrc)
  Catch cex As COMException
     ' could not connect
     _result = False
     Return
  End Try

  ' connects the client player
  _playCtrl.SourceFile = _networkUrl
End Sub

using Leadtools;
using Leadtools.Multimedia;
using LeadtoolsMultimediaExamples.Fixtures;

public bool _result = false;
public CaptureAndPlayCtrlForm _serverAndClient = new CaptureAndPlayCtrlForm();
CaptureCtrl _captureCtrl;
PlayCtrl _playCtrl;

const string _networkUrl = @"ltsf://127.0.0.1:27015"; // network stream url
const string _testMessage = "LEAD NETWORK";

public void NetworkSourceExample()
{
   // reference the capture control
   _captureCtrl = _serverAndClient.CaptureCtrl;

   // reference the play control
   _playCtrl = _serverAndClient.PlayCtrl;

   try
   {
      // try to find a video camera
      if (_captureCtrl.VideoDevices["Logitech"] == null)
         throw new Exception("No Logitech video device available");

      _captureCtrl.VideoDevices["Logitech"].Selected = true;

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

      // set the target output file
      _captureCtrl.TargetFormat = TargetFormatType.NET;
      _captureCtrl.TargetFile = _networkUrl;

      if (_captureCtrl.IsModeAvailable(CaptureMode.Video))
      {
         // just 10 seconds of capture time
         _captureCtrl.TimeLimit = 10;
         _captureCtrl.UseTimeLimit = true;

         _captureCtrl.FrameRate = 30;
         _captureCtrl.UseFrameRate = true;

         _captureCtrl.Preview = true;

         // subscribe to the started and progress events for this example
         // we will connect a client after the capture starts
         _captureCtrl.Started += new EventHandler(CaptureCtrl_Started);

         // ready the capture graph in order to get the LNMetMux instance
         _captureCtrl.ReadyCapture(CaptureMode.Video);

         // start capture
         _captureCtrl.StartCapture(CaptureMode.Video);

         // 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
               || _playCtrl.State == PlayState.Running)
         {
            Application.DoEvents();
         }
      }
   }
   catch (Exception)
   {
      _result = false;
   }
}

void CaptureCtrl_Started(object sender, EventArgs e)
{
   StartClient();
}

private void StartClient()
{
   try
   {
      LMNetSrc netSrc = new LMNetSrc();
      netSrc.CheckConnection(_networkUrl, 0, 5000);
      _result = true;
      Marshal.ReleaseComObject(netSrc);
   }
   catch (COMException)
   {
      // could not connect
      _result = false;
      return;
   }

   // connects the client player
   _playCtrl.SourceFile = _networkUrl;
}

Target Platforms

Reference

ILMNetSrc Interface
ILMNetSrc Members