uwp - How to add folder to StorageLibrary without RequestAddFolderAsync in C# -


i need save app files plugged sd card. i'm using uwp , windows 10.
msdn tells how to it windows libraries.

var mypicslibrary = await windows.storage.storagelibrary.getlibraryasync(windows.storage.knownlibraryid.pictures); await mypicslibrary.requestaddfolderasync();

requestaddfolderasync() shows file picker, user can choose folder add pictures. in case it's folder, created on sd card.

is there way thing without file picker dialog?

i'm trying like this:

var mypicslibrary = await windows.storage.storagelibrary.getlibraryasync(windows.storage.knownlibraryid.pictures);  // logical root folder external storage devices. storagefolder externaldevices = windows.storage.knownfolders.removabledevices;  // first child folder, represents sd card. storagefolder sdcard = (await externaldevices.getfoldersasync()).firstordefault();  var folder = await sdcard.createfolderasync("mysdcardfolder");  mypicslibrary.folders.insert(mydocs.folders.count+1, folder); // notimplementedexception: 'the method or operation not implemented.' mypicslibrary.folders.add(folder); // notimplementedexception: 'the method or operation not implemented.'

or maybe can same without using windows libraries directly working sdcard?

thanks lot!

edit:

in hand question sounds "how save files plugged sd card?"

the storagelibrary.folders gets folders in current library, return iobservablevector of storagefolder. when add folder iobservablevector, not change folder in files system. throw "the method or operation not implemented." exception.

we should able name of folder, , create folder uses name. can storagefile.copyasync method copy file in folder.

for example:

public static async task copyfolderasync(storagefolder source, storagefolder destinationcontainer, string desiredname = null) {     storagefolder destinationfolder = null;     destinationfolder = await destinationcontainer.createfolderasync(         desiredname ?? source.name, creationcollisionoption.replaceexisting);      foreach (var file in await source.getfilesasync())     {         await file.copyasync(destinationfolder, file.name, namecollisionoption.replaceexisting);     }     foreach (var folder in await source.getfoldersasync())     {         await copyfolderasync(folder, destinationfolder);     } }

then can use copyfolderasync method copy folder in picture library.

var mypicslibrary = await windows.storage.storagelibrary.getlibraryasync(windows.storage.knownlibraryid.pictures); var myfolder = mypicslibrary.folders[0]; storagefolder externaldevices = windows.storage.knownfolders.removabledevices; storagefolder sdcard = (await externaldevices.getfoldersasync()).firstordefault(); var folder = await sdcard.createfolderasync("mysdcardfolder"); await copyfolderasync(folder, myfolder);

Comments

Post a Comment

Popular posts from this blog

inversion of control - Autofac named registration constructor injection -

does autofac support specifying registration name in components' constructors? example: ninject's namedattribute . you need use autofac.extras.attributed package on top achieve this so let's have 1 interface , 2 classes: public interface ihello { string sayhello(); } public class englishhello : ihello { public string sayhello() { return "hello"; } } public class frenchhello : ihello { public string sayhello() { return "bonjour"; } } then have consumer class, in want select instance injected: public class helloconsumer { private readonly ihello helloservice; public helloconsumer([withkey("en")] ihello helloservice) { if (helloservice == null) { throw new argumentnullexception("helloservice"); } this.helloservice = helloservice; } public string sayhello() { return this.helloservice.sayhello()...
Read more

verilog - Systemverilog dynamic casting issues -

i've code snippet following in testbench function void write_to_port( my_data_type_base data ); my_data_type_extended data_ext; if(!$cast(data_ext, data)); `uvm_error(get_type_name(), "failed cast"); `uvm_info(get_name(), $psprintf("data_ext :\n%s", data_ext.sprint()), uvm_medium) // write data_ext out port.... endfunction when run it, i'm getting uvm_error "failed cast." i'm not quire sure why $cast not returning 1. can see, i'm printing out extended class data item after casting uvm_info. can see it's being cast properly. if don't use $cast if condition, don't runtime error. isn't coding practice use if dynamic cast check if $cast returning 1 ? what might reason behind cast not returning 1 in above case? i think semicolon on line 'if' not belong? i think consumes if statement, , uvm_error executes regardless of how if evaluates: if(!$cast(data_ext, data)); <- no semico...
Read more

ios - Change Storyboard View using Seague -

i have following code checks connection server, , depending on want change views if no connection found. nsstring *connect = [nsstring stringwithcontentsofurl:[nsurl urlwithstring:@"http://myserver.com"] encoding:nsutf8stringencoding error:nil]; if (connect == null) { [self performseguewithidentifier:@"network_failure" sender:self]; } else { // other code here } my problem not change views. have added storyboard segue between 2 views identifier of network_failure . not have navigation controller or that, problem? thanks help! no not problem. first of all, in objectivec exists nil object oriented null . must use that. so: if(connect == nil) or better: if(!connect) so due fact nil not same of null , probably code does't enter in if scope . you have been able discover breakpoint. anyway: be sure set trigger segue (line) 2 view controller , , name network_failure (that not best name. should instead view1toview2 ) as, m...
Read more