IndexOf(String) Method

Visual Basic
C#
C++/CLI

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

'Usage
 
Dim instance As TargetVideoFormats
Dim name As String
Dim value As Integer
 
value = instance.IndexOf(name)

public int IndexOf( 
   string name
)

public:
int IndexOf( 
   String^ name
)

Parameters

name: The TargetVideoFormat name to locate in the collection.

Return Value

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

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

Visual Basic
C#
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

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

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;
   }
}

Target Platforms

Reference

TargetVideoFormats Class
TargetVideoFormats Members
Overload List