GetInformationAsyncCompleted Event
Summary
Indicates that an asynchronous get information operation has been completed.
Syntax
PublicEventGetInformationAsyncCompletedAsEventHandler(Of CodecsGetInformationAsyncCompletedEventArgs)
synchronizedpublicvoidaddGetInformationAsyncCompletedListener(CodecsGetInformationAsyncCompletedListener listener)synchronizedpublicvoidremoveGetInformationAsyncCompletedListener(CodecsGetInformationAsyncCompletedListener listener)
public:eventEventHandler^ GetInformationAsyncCompleted
Event Data
The event handler receives an argument of typeCodecsGetInformationAsyncCompletedEventArgscontaining data related to this event. The followingCodecsGetInformationAsyncCompletedEventArgsproperties provide information specific to this event.
Example
usingLeadtools;usingLeadtools.Codecs;usingLeadtools.ImageProcessing;usingLeadtools.ImageProcessing.Color;usingLeadtools.Svg;publicvoidGetInformationAsyncCompletedExample(){stringsrcFileName = Path.Combine(LEAD_VARS.ImagesDir,"Image1.cmp");Uri uri =newUri(srcFileName);RasterCodecs编解码器=newRasterCodecs();// Now get information about the file asynchronouslycodecs.GetInformationAsyncCompleted +=newEventHandler(GetInformationAsyncCompletedExample_GetInformationAsyncCompleted);objectimageInfoObject = codecs.GetInformationAsync(uri,true, 1,null);// Notice that the returned imageInfoObject is a CodecsImageInfo with IsLoading set to true at this point// The IsLoading will be false (and hence, the object will be usable) when the GetInformationAsyncCompleted// fires.}privatevoidGetInformationAsyncCompletedExample_GetInformationAsyncCompleted(objectsender, CodecsGetInformationAsyncCompletedEventArgs e){if(e.Cancelled){Console.WriteLine("User canceled");}elseif(e.Error !=null){Console.WriteLine("Error: "+ e.Error.Message);}else{// Get the image infoCodecsImageInfo info = e.Info;Console.WriteLine("Image info obtainted asynchronously:\n{0}", info.ToString());info.Dispose();}// Unsubscribe to the event and dispose the RasterCodecs objectRasterCodecs编解码器=senderasRasterCodecs;codecs.GetInformationAsyncCompleted -=newEventHandler(GetInformationAsyncCompletedExample_GetInformationAsyncCompleted);codecs.Dispose();}staticclassLEAD_VARS{publicconststringImagesDir =@"C:\LEADTOOLS21\Resources\Images";}
