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HasDialog Method

Summary

Checks if the specified property dialog is available.

Syntax

C++/CLI

public virtual bool HasDialog( 
   CaptureDlg dialog 
)

public: 
virtual bool HasDialog(  
   CaptureDlg dialog 
)

Parameters

dialog
The dialog that the availability is to be checked.

Return Value

true if the specified property dialog is available; otherwise it is false.

Remarks

The dialog value must be one of the CaptureDlg enumeration values.

Example

using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void HasDialogExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   // output file for capture 
   string outFile = Path.Combine(LEAD_VARS.MediaDir, "CaptureCtrl_HasDialogExample.avi"); 
 
   try 
   { 
      // try to find a USB camera 
      if (capturectrl.VideoDevices["USB"] == null) 
         throw new Exception("No USB video device available"); 
 
      capturectrl.VideoDevices["USB"].Selected = true; 
 
      // try to find a USB audio device 
      if (capturectrl.AudioDevices["USB"] == null) 
         throw new Exception("No USB audio device available"); 
 
      capturectrl.AudioDevices["USB"].Selected = true; 
 
      // set the target output format 
      capturectrl.TargetFormat = TargetFormatType.MP4; 
 
      // The HasDialog method tells us that the control 
      // can display the desired settings dialog. 
      // check to see if the Target Format properties dialog is available 
      if (capturectrl.HasDialog(CaptureDlg.TargetFormat)) 
      { 
         // now show it to change some settings 
         capturectrl.ShowDialog(CaptureDlg.TargetFormat, _form); 
         _result = true; 
      } 
 
      // set the target output file and format 
      capturectrl.TargetFile = outFile; 
 
      // check if we have can capture video and audio 
      if (capturectrl.IsModeAvailable(CaptureMode.VideoAndAudio)) 
      { 
         capturectrl.FrameRate = 5;       // 5 frames per second  
         capturectrl.UseFrameRate = true; 
         capturectrl.TimeLimit = 10;      // just 10 seconds of capture time 
         capturectrl.UseTimeLimit = true; 
 
         // start the capture process 
         capturectrl.StartCapture(CaptureMode.VideoAndAudio); 
 
         // 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(); 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\LEADTOOLS22\Media"; 
}

Requirements

Target Platforms

Reference

CaptureCtrl Class

CaptureCtrl Members

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Help Version 22.0.2022.12.7

Leadtools.MediaFoundation Assembly

Introduction

Getting Started

Namespaces

Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies