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Preview Property

Summary

Gets or sets the Convert control's preview state.

Syntax

C++/CLI

public virtual bool Preview { get; set; }

public: 
virtual property bool Preview { 
   bool get(); 
   void set (    bool ); 
}

Property Value

true if Preview is enabled: otherwise it is false.

Remarks

The default value is false. If the property fails, an error is raised. For more information, refer to the Error Codes.

Note: When setting this property, the convert control must be in the stopped state.

Example

using Leadtools; 
using Leadtools.Multimedia; 
using LeadtoolsMultimediaExamples.Fixtures; 
 
 
public bool _result = false; 
public ConvertCtrlForm _form = new ConvertCtrlForm(); 
 
public void HasDialogExample() 
{ 
   // reference the convert control 
   ConvertCtrl convertctrl = _form.ConvertCtrl; 
 
   // input and output files 
   string inFile = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_Source.avi"); 
   string outFile = Path.Combine(LEAD_VARS.MediaDir, "ConvertCtrl_HasDialogExample.avi"); 
 
   try 
   { 
      // set the source for conversion 
      convertctrl.SourceFile = inFile; 
 
      // set the video and audio compressors 
      convertctrl.VideoCompressors.Mpeg2.Selected = true; 
      convertctrl.AudioCompressors.AC3.Selected = true; 
 
      // set the target output file and format 
      convertctrl.TargetFile = outFile; 
 
      // set the target output format 
      convertctrl.TargetFormat = TargetFormatType.AVI; 
 
      // The HasDialog method tells us that the control 
      // can display the desired settings dialog. 
      // check to see if the convert source dialog is available 
      if (convertctrl.HasDialog(ConvertDlg.TargetFormat)) 
      { 
         // now show it 
         convertctrl.ShowDialog(ConvertDlg.TargetFormat, _form); 
         _result = true; 
      } 
 
      // enable preview 
      convertctrl.Preview = true; 
 
      // set preview visible 
      convertctrl.PreviewVisible = true; 
 
      // start the capture process 
      convertctrl.StartConvert(); 
 
      // 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 (convertctrl.State == ConvertState.Running) 
         Application.DoEvents(); 
 
      // see if there was an error 
      if (convertctrl.ConvertError != 0) 
      { 
         // set the result to false 
         _result = false; 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string MediaDir = @"C:\LEADTOOLS22\Media"; 
}

Requirements

Target Platforms

Reference

ConvertCtrl Class

ConvertCtrl Members

ForceNoRecompressionPreview Property

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Help Version 22.0.2022.12.7

Leadtools.Multimedia Assembly

Introduction

Getting Started

Namespaces

Leadtools.Multimedia Namespace

Leadtools.Multimedia.Common Namespace

Assemblies