Leadtools.Codecs Namespace > Classes > RasterCodecs > Methods > LoadAsync Method > LoadAsync(Uri,LeadRect,Int32,CodecsLoadByteOrder,Int32,Int32,Object) Method

public Leadtools.RasterImage LoadAsync(  
   Uri uri, 
   Leadtools.LeadRect tile, 
   int bitsPerPixel, 
   Leadtools.Codecs.CodecsLoadByteOrder order, 
   int firstPage, 
   int lastPage, 
   object userState 
) 

Public Overloads Function LoadAsync( _ 
   ByVal uri As Uri, _ 
   ByVal tile As Leadtools.LeadRect, _ 
   ByVal bitsPerPixel As Integer, _ 
   ByVal order As Leadtools.Codecs.CodecsLoadByteOrder, _ 
   ByVal firstPage As Integer, _ 
   ByVal lastPage As Integer, _ 
   ByVal userState As Object _ 
) As Leadtools.RasterImage 

public Leadtools.RasterImage LoadAsync(  
   Uri uri, 
   Leadtools.LeadRect tile, 
   int bitsPerPixel, 
   Leadtools.Codecs.CodecsLoadByteOrder order, 
   int firstPage, 
   int lastPage, 
   object userState 
) 

 function Leadtools.Codecs.RasterCodecs.LoadAsync(Uri,LeadRect,Int32,CodecsLoadByteOrder,Int32,Int32,Object)(  
   uri , 
   tile , 
   bitsPerPixel , 
   order , 
   firstPage , 
   lastPage , 
   userState  
) 

public: 
Leadtools.RasterImage^ LoadAsync(  
   Uri^ uri, 
   Leadtools.LeadRect tile, 
   int bitsPerPixel, 
   Leadtools.Codecs.CodecsLoadByteOrder order, 
   int firstPage, 
   int lastPage, 
   Object^ userState 
)  

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
using LeadtoolsExamples.Common; 
 
public void LoadAsyncUrl3Example() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   Uri uri = new Uri(srcFileName); 
 
   // Load a random tile from the image at 1 bits/pixel asynchronously 
   LeadRect tileRect = new LeadRect(100, 50, 200, 150); 
   codecs.LoadAsyncCompleted += new EventHandler<CodecsLoadAsyncCompletedEventArgs>(LoadAsyncUrl3Example_LoadAsyncCompleted); 
   object rasterImageObject = codecs.LoadAsync(uri, tileRect, 1, CodecsLoadByteOrder.Rgb, 1, 1, null); 
 
   // Notice that the returned rasterImageObject is a RasterImage with IsLoading set to true at this point 
   // The IsLoading will be false (and hence, the object will be usable) when the LoadAsyncCompleteted 
   // fires. 
} 
 
private void LoadAsyncUrl3Example_LoadAsyncCompleted(object sender, CodecsLoadAsyncCompletedEventArgs e) 
{ 
   if (e.Cancelled) 
   { 
      Console.WriteLine("User canceled"); 
   } 
   else if (e.Error != null) 
   { 
      Console.WriteLine("Error: " + e.Error.Message); 
   } 
   else 
   { 
      // Everything is OK, get the image 
      RasterImage image = e.Image; 
      Console.WriteLine("Image at {0} loaded OK, size: {1} by {2}, order: {3}, bits/pixel: {4}", e.Uri, image.Width, image.Height, image.Order, image.BitsPerPixel); 
      image.Dispose(); 
   } 
 
   // Unsubscribe to the event and dispose the RasterCodecs object 
   RasterCodecs codecs = sender as RasterCodecs; 
   codecs.LoadAsyncCompleted -= new EventHandler<CodecsLoadAsyncCompletedEventArgs>(LoadAsyncUrl3Example_LoadAsyncCompleted); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; 
} 

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing 
Imports Leadtools.ImageProcessing.Color 
Imports Leadtools.Drawing 
Imports Leadtools.Svg 
 
Public Sub LoadAsyncUrl3Example() 
   Dim codecs As New RasterCodecs() 
 
   Dim srcFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp") 
   Dim uri As New Uri(srcFileName) 
 
   ' Load a random tile from the image at 1 bits/pixel asynchronously 
   Dim tileRect As New LeadRect(100, 50, 200, 150) 
   AddHandler codecs.LoadAsyncCompleted, AddressOf LoadAsyncUrl3Example_LoadAsyncCompleted 
   Dim rasterImageObject As Object = codecs.LoadAsync(uri, tileRect, 1, CodecsLoadByteOrder.Rgb, 1, 1, Nothing) 
 
   ' Notice that the returned rasterImageObject is a RasterImage with IsLoading set to true at this point 
   ' The IsLoading will be false (and hence, the object will be usable) when the LoadAsyncCompleteted 
   ' fires. 
End Sub 
 
Private Sub LoadAsyncUrl3Example_LoadAsyncCompleted(ByVal sender As Object, ByVal e As CodecsLoadAsyncCompletedEventArgs) 
   If e.Cancelled Then 
      Console.WriteLine("User canceled") 
   ElseIf Not IsNothing(e.Error) Then 
      Console.WriteLine("Error: " + e.Error.Message) 
   Else 
      ' Everything is OK, get the image 
      Dim image As RasterImage = e.Image 
      Console.WriteLine("Image at {0} loaded OK, size: {1} by {2}, order: {3}, bits/pixel: {4}", e.Uri, image.Width, image.Height, image.Order, image.BitsPerPixel) 
      image.Dispose() 
   End If 
 
   ' Unsubscribe to the event and dispose the RasterCodecs object 
   Dim codecs As RasterCodecs = DirectCast(sender, RasterCodecs) 
   RemoveHandler codecs.LoadAsyncCompleted, AddressOf LoadAsyncUrl3Example_LoadAsyncCompleted 
   codecs.Dispose() 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" 
End Class 

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