Asynchronously gets the image information from a stream containing image data.
public static Task<CodecsImageInfo> GetInformationAsync(
this RasterCodecs rasterCodecs,
ILeadStream stream,
bool totalPages
)
rasterCodecs
RasterCodecs object to perform the operation.
stream
Asynchronously gets the image information from a stream containing image data.
totalPages
true to query the file for total number of pages; false, otherwise.
A Task
that represents the asynchronous operation. TResult
: CodecsImageInfo object that contains the information about the specified image. See remarks about the usage of this object.
This topic is part of RasterCodecs
support for .NET async/await
support. Refer to RasterCodecs Async Operations for more information.
Specifying true for totalPages can cause the process to be slow for files with large number of pages.
The RasterCodecs class supports getting information on image files asynchronously using the GetInformationAsync methods.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
using Leadtools.Svg;
using LeadtoolsExamples.Common;
public async void GetInformationAsyncExample()
{
// For .NET Framework: Add a reference to Leadtools.Async to get the async support as extension methods
// For .NET Standard: async support is included.
// Get Information on a TIF image file and write it out
string address = @"https://demo.leadtools.com/images/tiff/ocr1.tif";
Uri uri = new Uri(address);
using (RasterCodecs codecs = new RasterCodecs())
{
// Create an ILeadStream object to the URI
using (ILeadStream leadStream = await LeadStream.Factory.FromUri(uri))
{
using (CodecsImageInfo info = await codecs.GetInformationAsync(leadStream, true))
{
Console.WriteLine("Information for: {0}", uri);
Console.WriteLine("Format: {0}", info.Format);
Console.WriteLine("Width: {0}", info.Width);
Console.WriteLine("Height: {0}", info.Height);
Console.WriteLine("BitsPerPixel: {0}", info.BitsPerPixel);
Console.WriteLine("BytesPerLine: {0}", info.BytesPerLine);
Console.WriteLine("PageNumber: {0}", info.PageNumber);
Console.WriteLine("TotalPages: {0}", info.TotalPages);
}
}
}
}
For .NET Framework: A reference to the Leadtools.Async.dll assembly is required to use this functionality.
For .NET Standard: This functionality is included in the Leadtools.Codecs.dll assembly.
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