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IndexOf(string) Method

Summary

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

Syntax

C++

public int IndexOf( 
   string name 
)

Public Overloads Function IndexOf( _ 
   ByVal name As String _ 
) As Integer

public: 
int IndexOf(  
   String^ name 
)

Parameters

name
The TargetFormat 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

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; 
 
      // check the index using a name string 
      int i = formats.IndexOf("WMV"); 
 
      // or get a target format directly, using a TargetFormatType enum 
      TargetFormat mp4 = formats[TargetFormatType.MP4]; 
 
      // access the format via the collection indexer 
      TargetFormat af = formats[i]; 
 
      // check if the collection contains this format  
      // (it should we just got it with IndexOf above) 
      if (formats.Contains(af) && formats.Contains(mp4)) 
      { 
         // 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 
 
      ' check the index using a name string 
      Dim i As Integer = formats.IndexOf("WMV") 
 
      ' or get a target format directly, using a TargetFormatType enum 
      Dim mp4 As TargetFormat = formats(TargetFormatType.MP4) 
 
      ' access the format via the collection indexer 
      Dim af As TargetFormat = formats(i) 
 
      ' check if the collection contains this format  
      ' (it should we just got it with IndexOf above) 
      If formats.Contains(af) AndAlso formats.Contains(mp4) 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

Reference

TargetFormats Class

TargetFormats Members

Overload List

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Help Version 21.0.2021.7.2

Leadtools.MediaFoundation Assembly

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Leadtools.MediaFoundation Namespace

Leadtools.MediaFoundation.Common Namespace

Assemblies