Leadtools.Windows.Controls Namespace > ImageList Class : EnsureVisible Method |
function Leadtools.Windows.Controls.ImageList.EnsureVisible( index )
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.
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
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"; }
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); }
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: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2