c# - Is ExifLib usable in a WPF / XAML app? -

c# - Is ExifLib usable in a WPF / XAML app? -

i want extract exif info jpg images. exiflib seemed selection simplify chore, , installed via nuget.

i tried started using sample code here (commenting out messagebox code now):

using (exifreader reader = new exifreader(@"c:\temp\testimage.jpg")) { // extract tag info using exiftags enumeration datetime datepicturetaken; if (reader.gettagvalue<datetime>(exiftags.datetimedigitized, out datepicturetaken)) { // whatever required extracted info //system.windows.messagebox.show(this, string.format("the image taken on {0}", // datepicturetaken), "image information"); //, messageboxbuttons.ok); } }

but error:

the best overloaded method match 'exiflib.exifreader.exifreader(system.io.stream)' has invalid arguments

and

argument 1: cannot convert 'string' 'system.io.stream'

both on line:

using (exifreader reader = new exifreader(@"c:\temp\testimage.jpg"))

is fixable, or exiflib not usable wpf / xaml app?

if exiflib not viable solution wpf / xaml app, alternatives exist?

update:

with code, simon mckenzie's answer:

private void btnloadnewphotoset_click(object sender, routedeventargs e) { using (var store = isolatedstoragefile.getuserstoreforapplication()) using (var stream = store.openfile("testimage.jpg", filemode.open)) using (var reader = new exifreader(stream)) { // ... } }

i still error:

the type or namespace name 'isolatedstorage' not exist in namespace 'system.io' (are missing assembly reference?)

this windows store (c#) app created in visual studio 2013. project's properties shows targets windows 8.1, , configuration manager shows configuration == debug, platform = x64)

my project's displayed references are:

.net windows store apps bing.maps.xaml exiflib microsoft visual c++ runtime bundle windows 8.1

what missing?

update 2:

when in reference manager @ assemblies.framework, says, "all of framework assembles referenced..." assume mscorlib.dll supposed 1 of these (it doesn't list them)?

i searched hard drive "mscorlib.dll" , i've got 1000000 of them, different sizes , dates. 1 should seek add together reference? i've got 1 in c:\program files (x86)\reference assemblies\microsoft\framework.netframework\v4.5 dated 7/9/2012 file size of 2,564,528 1 in c:\program files (x86)\reference assemblies\microsoft\framework.netcore\v4.5.1 to...you name it.

thinking "c:\program files (x86)\reference assemblies\microsoft\framework.netcore\v4.5.1" seemed best bet, tried reference via browse button, when did, got scolded with:

in interests of total disclosure, in reference manager windows 8.1, says, "the windows 8.1. sdk referenced."

for windows 8.1.extensions, shows me:

microsoft visual c++ 2013 runtime bundle windows 12.0 (unchecked) microsoft visual c++ 2013 runtime bundle 11.0 (checked)

since seems cause of 1 of warnings, reversed checkedness (checked 2013, unchecked other).

i checked:

behaviors sdk (xaml) 12.0 sqlite windows runtime 3.8.6 (because using sqlite in project)

update 3:

i found this: "isolated storage not available windows store apps. instead, utilize application info classes in windows.storage namespaces included in windows runtime api store local info , files." here.

update 4:

i'm waiting simon's example, i'm thinking might this:

using windows.storage; using exiflib; . . . private async void btnopenimgfiles_click(object sender, routedeventargs e) { fileopenpicker openpicker = new fileopenpicker(); openpicker.viewmode = pickerviewmode.thumbnail; openpicker.suggestedstartlocation = pickerlocationid.pictureslibrary; openpicker.filetypefilter.add(".jpg"); openpicker.filetypefilter.add(".jpeg"); openpicker.filetypefilter.add(".png"); ireadonlylist<storagefile> files = await openpicker.pickmultiplefilesasync(); (int = 0; < files.count; i++) { using (var randomaccessstream = await files[i].openasync(fileaccessmode.read)) using (var stream = randomaccessstream.asstream()) using (var exfrdr = new exifreader(stream)) { // ...exfrdr } } }

the string constructor not available in windows phone/windows store apps because aren't allowed direct filesystem access. instead need pass in stream containing image. here's illustration using fileopenpicker. note utilize of asstream(...) convert irandomaccessstream stream utilize exifreader.

using system; using system.io; using windows.storage; using windows.storage.pickers; // ... var picker = new fileopenpicker(); picker.filetypefilter.add(".jpg"); var file = await picker.picksinglefileasync(); using (var randomaccessstream = await file.openasync(fileaccessmode.read)) { using (var stream = randomaccessstream.asstream()) { using (var reader = new exifreader(stream)) { string model; if (reader.gettagvalue(exiftags.model, out model)) { var dialog = new messagedialog(model, "camera model"); dialog.showasync(); } } } }

c# .net wpf windows-store-apps exiflib