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IndexOf(string) Method

Summary

Determines the index of a specific TargetAudioFormat name in the collection.

Syntax

C#
VB
C++
public int IndexOf( 
   string name 
) 
Public Overloads Function IndexOf( _ 
   ByVal name As String _ 
) As Integer 
public: 
int IndexOf(  
   String^ name 
)  

Parameters

name
The TargetAudioFormat name to locate in the collection.

Return Value

The zero-based index of the found item; otherwise -1 if no item found.

Remarks

This method searches the underlying item collection to locate the item name specified.

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 audio device first, you should use your audio device name here 
      if (capturectrl.AudioDevices["USB"] == null) 
         throw new Exception("No USB audio device available"); 
 
      capturectrl.AudioDevices["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 audio formats object 
      TargetAudioFormats taformats = tf.AudioFormats; 
 
      // check the index using a name string 
      int i = taformats.IndexOf("{00001610-0000-0010-8000-00AA00389B71}");// AAC 
 
      // set current selection 
      taformats.Selection = i; 
 
      // access the format via the collection indexer 
      TargetAudioFormat taformat = taformats[i]; 
 
      // check if the collection contains this format  
      // (it should we just got it with IndexOf above) 
      if (taformats.Contains(taformat)) 
      { 
         // 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 audio device first, you should use your audio device name here 
      If capturectrl.AudioDevices("USB") Is Nothing Then 
         Throw New Exception("No USB audio device available") 
      End If 
 
      capturectrl.AudioDevices("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 audio formats object 
      Dim taformats As TargetAudioFormats = tf.AudioFormats 
 
      ' check the index using a name string 
      Dim i As Integer = taformats.IndexOf("{00001610-0000-0010-8000-00AA00389B71}") ' AAC 
 
      ' set current selection 
      taformats.Selection = i 
 
      ' access the format via the collection indexer 
      Dim taformat As TargetAudioFormat = taformats(i) 
 
      ' check if the collection contains this format  
      ' (it should we just got it with IndexOf above) 
      If taformats.Contains(taformat) 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

Help Version 19.0.2017.10.19
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Leadtools.MediaFoundation Assembly