EnsureVisible Method

Visual Basic
C#
Objective-C
Java
C++

public void EnsureVisible( 
   int index
)

'Declaration
 
Public Sub EnsureVisible( _
   ByVal index As Integer _
)

'Usage
 
Dim instance As ImageList
Dim index As Integer
 
instance.EnsureVisible(index)

public:
void EnsureVisible( 
   int index
)

Parameters

index: The zero-based index of the item to scroll into view.

You can use this method to ensure that a specific item is visible within the ImageList control. When performing validation on the items in a ImageList, you can call the EnsureVisible method to ensure that an item that failed validation is displayed in the ImageList control to allow the user to perform changes on the item. If the item that you want to ensure is visible is located above the viewable region of the ImageList control, calling the EnsureVisible method will scroll the contents of the control until it is the first item in the viewable area of the control. If the item is below the viewable region of the ImageList control, calling the EnsureVisible method will scroll the contents of the ImageList control until the item is the last item in the viewable area of the control.

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

Copy Code

Imports Leadtools.Windows.Controls
Imports Leadtools.Codecs
Imports Leadtools

Public Sub ImageList_EnsureVisible(ByVal imageList As ImageList)
   imageList.Orientation = Orientation.Horizontal
   ' Append the new item to the image list control
   Dim imageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg")
   Dim item As ImageListItem = New ImageListItem()
   item.Source = New BitmapImage(New Uri(imageFileName))
   item.Text = "New Item"

   imageList.Items.Add(item)
   Dim nIndex As Integer = imageList.Items.IndexOf(item)

   ' Make sure this new item is visible to the user
   imageList.EnsureVisible(nIndex)
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class

using Leadtools.Help;
using Leadtools.Windows.Controls;
using Leadtools;
using Leadtools.Codecs;

public void ImageList_EnsureVisible(ImageList imageList)
{
   imageList.Orientation = Orientation.Horizontal;
   // Append the new item to the image list control
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg");
   ImageListItem item = new ImageListItem();
   item.Source = new BitmapImage(new Uri(imageFileName));
   item.Text = "New Item";

   imageList.Items.Add(item);
   int nIndex = imageList.Items.IndexOf(item);

   // Make sure this new item is visible to the user
   imageList.EnsureVisible(nIndex);
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

using Leadtools.Help;
using Leadtools.Windows.Controls;

public void ImageList_EnsureVisible(ImageList imageList)
{
   imageList.Orientation = Orientation.Horizontal;
   // Append the new item to the image list control
   string imageFileName = LeadtoolsExamples.Common.ImagesPath.Path + "cannon.jpg";
   ImageListItem item = new ImageListItem();
   item.Source = new BitmapImage(new Uri(imageFileName));
   item.Text = "New Item";

   imageList.Items.Add(item);
   int nIndex = imageList.Items.IndexOf(item);

   // Make sure this new item is visible to the user
   imageList.EnsureVisible(nIndex);
}

Imports Leadtools.Windows.Controls

Public Sub ImageList_EnsureVisible(ByVal imageList As ImageList)
   imageList.Orientation = Orientation.Horizontal
   ' Append the new item to the image list control
   Dim imageFileName As String = LeadtoolsExamples.Common.ImagesPath.Path & "cannon.jpg"
   Dim item As ImageListItem = New ImageListItem()
   item.Source = New BitmapImage(New Uri(imageFileName))
   item.Text = "New Item"

   imageList.Items.Add(item)
   Dim nIndex As Integer = imageList.Items.IndexOf(item)

   ' Make sure this new item is visible to the user
   imageList.EnsureVisible(nIndex)
End Sub

Target Platforms

Reference

ImageList Class
ImageList Members