Public Sub EnsureVisible( _
   ByVal index As Integer _
) 

Visual Basic (Usage)	Copy Code
Dim instance As RasterImageList Dim index As Integer   instance.EnsureVisible(index)

public void EnsureVisible( 
   int index
)

public:
void EnsureVisible( 
   int index
) 

Parameters

index

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

This example will add a new item to the end of a RasterImageList control and make sure the item is visible to the user.

Visual Basic

Copy Code

Public Sub RasterImageList_EnsureVisible(ByVal imageList As RasterImageList)     RasterCodecs.Startup()     Dim codecs As RasterCodecs = New RasterCodecs()     Dim image As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "image1.cmp")     RasterCodecs.Shutdown()     imageList.ScrollStyle = RasterImageListScrollStyle.Horizontal     ' Append the new item to the image list control     Dim item As RasterImageListItem = New RasterImageListItem(image, 1, "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

C#

Copy Code

public void RasterImageList_EnsureVisible(RasterImageList imageList)  {     RasterCodecs.Startup();     RasterCodecs codecs = new RasterCodecs();     RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "image1.cmp");     RasterCodecs.Shutdown();     imageList.ScrollStyle = RasterImageListScrollStyle.Horizontal;       // Append the new item to the image list control     RasterImageListItem item = new RasterImageListItem(image, 1, "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);  }

You can use this method to ensure that a specific item is visible within the RasterImageList control. When performing validation on the items in a RasterImageList, you can call the EnsureVisible method to ensure that an item that failed validation is displayed in the RasterImageList 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 RasterImageList 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 RasterImageList control, calling the EnsureVisible method will scroll the contents of the RasterImageList control until the item is the last item in the viewable area of the control.

To determine if an item is located at the top of the display area of a RasterImageList control, use the TopIndex property.

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Reference