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IndexOf(TargetVideoFormat) Method

Summary

Determines the index of a specific TargetVideoFormat item in the IList.

Syntax

C#
VB
C++
public int IndexOf( 
   TargetVideoFormat item 
) 
Public Overloads Function IndexOf( _ 
   ByVal item As Leadtools.Mediafoundation.TargetVideoFormat _ 
) As Integer 

Parameters

item
The TargetVideoFormat item to locate in the IList.

Return Value

System.Int32

Remarks

This method uses the Find method of the underlying item collection to locate the desired item.

Example

C#
VB
using Leadtools; 
using Leadtools.MediaFoundation; 
using LeadtoolsMediaFoundationExamples.Fixtures; 
 
public bool _result = false; 
public CaptureCtrlForm _form = new CaptureCtrlForm(); 
 
public void IndexContainsExample() 
{ 
   // reference the capture control 
   CaptureCtrl capturectrl = _form.CaptureCtrl; 
 
   try 
   { 
      // set an video device first, you should use your video device name here 
      if (capturectrl.VideoDevices["USB"] == null) 
         throw new Exception("No USB video device available"); 
 
      capturectrl.VideoDevices["USB"].Selected = true; 
 
      // reference the target formats object 
      TargetFormats formats = capturectrl.TargetFormats; 
 
      // reference the target format object 
      TargetFormat tf = formats[TargetFormatType.MP4]; 
 
      // reference the target video formats object 
      TargetVideoFormats tvformats = tf.VideoFormats; 
 
      // check the index using a name string 
      int i = tvformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}");// H264 
 
      // get target video format object 
      TargetVideoFormat tvf = tvformats[i]; 
 
      // make sure the target video format object's name equals {34363248-0000-0010-8000-00AA00389B71} 
      if (tvf.Name == "{34363248-0000-0010-8000-00AA00389B71}") 
      { 
         // get target video format friendly name, use it for view propose. 
         string friendlyname = tvf.FriendlyName; 
      } 
      else 
         throw new Exception(); 
 
      // select it 
      tvf.Selected = true; 
 
      // check if the collection contains this format  
      // (it should we just got it with IndexOf above) 
      if (tvformats.Contains(tvf)) 
      { 
         // set the result to what we expect 
         _result = true; 
      } 
   } 
   catch (Exception) 
   { 
      _result = false; 
   } 
} 
Imports Leadtools 
Imports Leadtools.MediaFoundation 
Imports LeadtoolsMediaFoundationExamples.Fixtures 
 
Public _result As Boolean = False 
Public _form As CaptureCtrlForm = New CaptureCtrlForm() 
 
Public Sub IndexContainsExample() 
   ' reference the capture control 
   Dim capturectrl As CaptureCtrl = _form.CaptureCtrl 
 
   Try 
      ' set an video device first, you should use your video 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 
 
      ' reference the target formats object 
      Dim formats As TargetFormats = capturectrl.TargetFormats 
 
      ' reference the target format object 
      Dim tf As TargetFormat = formats(TargetFormatType.MP4) 
 
      ' reference the target video formats object 
      Dim tvformats As TargetVideoFormats = tf.VideoFormats 
 
      ' check the index using a name string 
      Dim i As Integer = tvformats.IndexOf("{34363248-0000-0010-8000-00AA00389B71}") ' H264 
 
      ' get target video format object 
      Dim tvf As TargetVideoFormat = tvformats(i) 
 
      ' make sure the target video format object's name equals {00000161-0000-0010-8000-00AA00389B71} 
      If tvf.Name = "{34363248-0000-0010-8000-00AA00389B71}" Then 
         ' get target video format friendly name, use it for view propose. 
         Dim friendlyname As String = tvf.FriendlyName 
      Else 
         Throw New Exception() 
      End If 
 
      ' select it 
      tvf.Selected = True 
 
      ' check if the collection contains this format  
      ' (it should we just got it with IndexOf above) 
      If tvformats.Contains(tvf) Then 
         ' set the result to what we expect 
         _result = True 
      End If 
   Catch e1 As Exception 
      _result = False 
   End Try 
End Sub 

Requirements

Target Platforms

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Leadtools.MediaFoundation Assembly