vb.net - Write and read to text file on usb drive in Windows iot -


i have raspberry pi 3 windows iot core on it. i'm making app visual studio 2017.

i want read , write textfile on usb drive connected pi.

i looked around site , find same question of them don't work me.

this have!!

the mainpage

imports windows.storage imports windows.devices.usb imports windows.devices.enumeration   public notinheritable class mainpage inherits page  protected overrides sub onnavigatedto(e navigationeventargs)     opendeviceasync() end sub  private async sub opendeviceasync()     dim externaldevices storagefolder = knownfolders.removabledevices     dim externaldrives ireadonlylist(of storagefolder) = await externaldevices.getfoldersasync()     dim sdcard storagefolder = externaldrives(0)     if sdcard isnot nothing         dim storagefolder storagefolder = knownfolders.removabledevices         dim samplefile storagefile = await sdcard.createfileasync("sample.txt", creationcollisionoption.replaceexisting)     end if end sub   end class

the package.appxmanifest file addes usb capability

<capabilities> <capability name="internetclient" /> <uap:capability name="removablestorage" />   <devicecapability name="serialcommunication">       <device id="any">           <function type="name:serialport" />       </device>   </devicecapability>

and .txt extension

<extensions>     <uap:extension category="windows.filetypeassociation">       <uap:filetypeassociation name="text">         <uap:supportedfiletypes>           <uap:filetype>.txt</uap:filetype>         </uap:supportedfiletypes>       </uap:filetypeassociation>     </uap:extension>   </extensions>

then when want start app thru remote machine on pi 3, visual studio stops , give's following page "app.g.i.vb" text in yellow

#if debug andalso not disable_xaml_generated_break_on_unhandled_exception      addhandler me.unhandledexception,         sub(sender global.system.object, unhandledexceptionargs  global.windows.ui.xaml.unhandledexceptioneventargs)             if global.system.diagnostics.debugger.isattached                 global.system.diagnostics.debugger.break() <----- yellow             end if         end sub #end if

can maby me please. in future want read .jpg files usb storage


Comments

Post a Comment

Popular posts from this blog

Command prompt result in label. Python 2.7 -

i want put result(output) of shell command label. command works, label shows "0", however, in command prompt, result shown correctly, need showed in label. doing ubuntu. myg1 = button(root, text="rodyti informacija", command=lambda: gauti()) myg1.pack(side=bottom) def gauti(): imti = tekstas.get("1.0", "end-1c") info = subprocess.call("id '{imti}' ".format(imti=imti), shell=true) w = label(root, text= info) w.pack(side = bottom) subprocess.call() returns exit code of process created (in case 0 success). if want text output of process, should instead call subprocess.check_output() .
Read more

javascript - How do I use URL parameters to change link href on page? -

i change href value of link using url parameters. example: default <a id="dlink" href="link-1">link</a> but, when user goes https://url.com/?dlink=link-2 it swaps out link new link <a id="dlink" href="link-2">link</a> first need value url. if you're not using javascript framework can create function using jquery. please check get url parameter jquery or how query string values in js it. after that, element "a" id , set value there. $("#dlink").attr("href", hreffromparam);
Read more

amazon web services - AWS Route53 Trying To Get Site To Resolve To www -

so have domain nameservers pointed aws route 53. site hosted on ec2 instance , reachable resolves site.com, if input www.site.com. i'm curious how site resolve www.site.com. have under route53 domains hosted zone 2 additional record sets outside of ns , soa: a site.com ec2 elastic ip cname www.site.com ec2 public dns i can reach site using both site.com , www.site.com, resolve site.com. there way make if enter either, resolves www.site.com? at first, both should record set. a site.com ec2 elastic ip www.site.com ec2 elastic ip and need redirect setting in web server (nginx, apache, ..) following. (source: how redirect www non-www nginx on centos 7 ) redirect non-www www if want redirect users plain, non-www domain www domain, add server block: server { server_name example.com; return 301 $scheme://www.example.com$request_uri; } save , exit. configures nginx redirect requests "example.com" "www.example.com". not...
Read more