Develop Reference

UWP application unable to access USB drive even though permissions are set

I am working on an app that is responsible for formatting a USB drive and prepare it for further use on an embedded system.
I am formatting the drive using the following method that I found on stack overflow (unfortunately I did not save the link. I'll post it there if I find it again)
public static bool FormatUSB(string driveLetter, string fileSystem = "FAT32", bool quickFormat = true,
int clusterSize = 4096, string label = "USB_0000", bool enableCompression = false)
{
//add logic to format Usb drive
//verify conditions for the letter format: driveLetter[0] must be letter. driveLetter[1] must be ":" and all the characters mustn't be more than 2
if (driveLetter.Length != 2 || driveLetter[1] != ':' || !char.IsLetter(driveLetter[0]))
return false;
//query and format given drive
//best option is to use ManagementObjectSearcher
var files = Directory.GetFiles(driveLetter);
var directories = Directory.GetDirectories(driveLetter);
foreach (var item in files)
{
try
{
File.Delete(item);
}
catch (UnauthorizedAccessException) { }
catch (IOException) { }
}
foreach (var item in directories)
{
try
{
Directory.Delete(item);
}
catch (UnauthorizedAccessException) { }
catch (IOException) { }
}
ManagementObjectSearcher searcher = new ManagementObjectSearcher(#"select * from Win32_Volume WHERE DriveLetter = '" + driveLetter + "'");
foreach (ManagementObject vi in searcher.Get())
{
try
{
var completed = false;
var watcher = new ManagementOperationObserver();
watcher.Completed += (sender, args) =>
{
Console.WriteLine("USB format completed " + args.Status);
completed = true;
};
watcher.Progress += (sender, args) =>
{
Console.WriteLine("USB format in progress " + args.Current);
};
vi.InvokeMethod(watcher, "Format", new object[] { fileSystem, quickFormat, clusterSize, label, enableCompression });
while (!completed) { System.Threading.Thread.Sleep(1000); }
}
catch
{
}
}
return true;
}
I also added all the capabilities that should be required (I think) in order to access a removable drive in my manifest:
<?xml version="1.0" encoding="utf-8"?>
<Package
xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
xmlns:rescap="http://schemas.microsoft.com/appx/manifest/foundation/windows10/restrictedcapabilities"
xmlns:iot="http://schemas.microsoft.com/appx/manifest/iot/windows10"
IgnorableNamespaces="uap mp rescap iot">
<Identity
Name="7b9becad-6afd-4872-bcb7-7f414c098edf"
Publisher="CN=vitto"
Version="1.0.0.0" />
<mp:PhoneIdentity PhoneProductId="7b9becad-6afd-4872-bcb7-7f414c098edf" PhonePublisherId="00000000-0000-0000-0000-000000000000"/>
<Properties>
<DisplayName>DiskMakerApp</DisplayName>
<PublisherDisplayName>vitto</PublisherDisplayName>
<Logo>Assets\StoreLogo.png</Logo>
</Properties>
<Dependencies>
<TargetDeviceFamily Name="Windows.Universal" MinVersion="10.0.0.0" MaxVersionTested="10.0.0.0" />
</Dependencies>
<Resources>
<Resource Language="x-generate"/>
</Resources>
<Applications>
<Application Id="App"
Executable="$targetnametoken$.exe"
EntryPoint="DiskMakerApp.App">
<uap:VisualElements
DisplayName="DiskMakerApp"
Square150x150Logo="Assets\Square150x150Logo.png"
Square44x44Logo="Assets\Square44x44Logo.png"
Description="DiskMakerApp"
BackgroundColor="transparent">
<uap:DefaultTile Wide310x150Logo="Assets\Wide310x150Logo.png"/>
<uap:SplashScreen Image="Assets\SplashScreen.png" />
</uap:VisualElements>
</Application>
</Applications>
<Capabilities>
<rescap:Capability Name="broadFileSystemAccess" />
<rescap:Capability Name="appCaptureSettings" />
<Capability Name="internetClient" />
<uap:Capability Name="removableStorage" />
<iot:Capability Name="systemManagement"/>
<DeviceCapability Name="usb"/>
</Capabilities>
</Package>
And also allowed access to the file system in Window's settings page:
But I am still getting:
I am wondering if I am missing anything. Is there a way I could run the app as an administrator^ Would that solve the issue? (In any case, only admins would be able to run that app in a real life scenario)

UWP application unable to access USB drive even though permissions are set
Directory.GetFiles can't not use to access file with path in UWP platform. And you can only use Windows Storage API to access file with path (enable broadFileSystemAccess ), by the way, System.Management Namespace is not work for UWP platform, and if you want to format USB device within UWP app, please use desktop extension to process. for more please refer stefan' blog UWP with Desktop Extension

SocketException: "access denied" while opening port using UdpClient

I'm trying to start listening on one of UDP ports on Android device. I'm using Xamarin.Forms and I'm testing it on physical android phone.
public void StartListening(int port = 13000)
{
ListenerPort = port;
udpClient = new UdpClient(ListenerPort);
udpClient.BeginReceive(new AsyncCallback(handleIncomingMessages), null);
}
This function is being used on application start:
public partial class App : Application
{
[...]
protected override void OnStart()
{
network.StartListening(LISTENING_ON_PORT);
}
}
The are many similar questions on SO, but most of them were solved by adding INTERNET permission to android manifest. Here is mine:
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="1" android:versionName="1.0" package="com.companyname.ddand">
<uses-sdk android:minSdkVersion="21" android:targetSdkVersion="28" />
<application android:label="ddAnd.Android" android:theme="#style/MainTheme"></application>
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
</manifest>
What I see after deploying my app is:
System.Net.Sockets.SocketException: 'Access denied'
and no other details provided.
I've thought my port is being used by another process, but I've check many of them (outside of 1-1024 range) and using all of them gave the same results.
Are there any other reasons for this exception? Do you have any ideas how can I throubleshoot the problem (e.g. how to find available port)?
EDIT:
As suggested in comments, I tried to gain access at runtime (though it should not be necessary, INTERNET permission is granted by default by Xamarin in Debug mode).
This line returns information that permission is granted.
var havePermission = ContextCompat.CheckSelfPermission(this, Manifest.Permission.Internet);
Nevertheless I tried to manually get access at runtime
ActivityCompat.RequestPermissions(this, new String[] { Manifest.Permission.Internet }, 1);
Result is the same as before.

Can you try with the following code? (adapted from the documentation)
public void StartListening(int port = 13000)
{
ListenerPort = port;
IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Any, ListenerPort);
udpClient = new UdpClient(ipEndPoint);
UdpState udpState = new UdpState();
udpState.e = ipEndPoint;
udpState.u = udpClient;
udpState.BeginReceive(new AsyncCallback(handleIncomingMessages), udpState);
}

Showing PDF-File with MVVM Cross on Android and IOS

I want to open a PDF on the Phone via the File-Path but i cant figure out how i could do this properly without using 3rd party packages.
You have any suggestion for this?
I already tried to use this on Android:
public void OpenFile(string filePath)
{
var fileToOpen = new Java.IO.File(filePath);
var uri = FileProvider.GetUriForFile(Application.Context, Application.Context.PackageName + ".fileprovider", fileToOpen);
var intent = new Intent();
var mime = IOUtil.GetMimeType(uri.ToString());
intent.SetAction(Intent.ActionView);
intent.SetDataAndType(uri, mime);
intent.SetFlags(ActivityFlags.NewTask);
intent.AddFlags(ActivityFlags.GrantReadUriPermission);
Application.Context.StartActivity(intent);
}
But i get the following Error:
Unhandled Exception:
Java.Lang.NullPointerException: Attempt to invoke virtual method
'android.content.res.XmlResourceParser
android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager,
java.lang.String)' on a null object reference

first you should addd this code to your manifest file :
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.easyphotopicker.fileprovider"
android:exported="false"
android:grantUriPermissions="true"
tools:replace="android:authorities">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="#xml/filepaths"
tools:replace="android:resource"/>
</provider>
and create filepaths :
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<root-path name="root" path="" /> //root directory of the device new File("/");
<files-path name="files" path="" /> //context.getFilesDir()
<cache-path name="cache" path="" /> //context.getCacheDir()
<external-path name="external" path="" /> //Environment.getExternalStorageDirectory()
<external-files-path name="name" path="path" /> //context.getExternalFilesDirs()
<external-cache-path name="name" path="path" /> //getExternalCacheDirs()
</paths>

Your error is telling us that there is no file at the location matching that's passed into the function. There's a few ways of doing this, one of them is as shown. After accepting permissions to access folders and files, this should be one of the simplest ways. You seem to be close:
public void OpenPdfFile(string filename)
{
var f = new Java.IO.File(filename);
if (f.Exists())
{
System.Diagnostics.Debug.WriteLine("File exists!");
try
{
var openFileIntent = new Intent(Intent.ActionView);
openFileIntent.SetDataAndType(Android.Net.Uri.FromFile(f), "application/pdf");
openFileIntent.SetFlags(ActivityFlags.NoHistory);
StartActivity(Intent.CreateChooser(openFileIntent, "Open pdf file"));
}
catch (ActivityNotFoundException)
{
//handle when no available apps
}
}
}
I haven't tested your work, but the first thing would be to see if you added this to the Manifest file
android:authorities="com.{package}.{name}.fileprovider"
since your code says Application.Context.PackageName + ".fileprovider"

iText7 unable to setup logging

I'm trying to use PdfCleanUpTool with iText7.
However my final PDF is corrupted (it is only 15B in size).
When I start my console app from VS I get this in Output:
no configuration section found - suppressing logging output
I'm trying to setup logging to get error message, but without luck.
I've installed this packages:
<?xml version="1.0" encoding="utf-8"?>
<packages>
<package id="Common.Logging" version="3.4.1" targetFramework="net47" />
<package id="Common.Logging.Core" version="3.4.1" targetFramework="net47" />
<package id="Common.Logging.NLog4412" version="3.4.1" targetFramework="net47" />
<package id="itext7" version="7.1.2" targetFramework="net47" />
<package id="itext7.pdfsweep" version="2.0.1" targetFramework="net47" />
<package id="Microsoft.CSharp" version="4.0.1" targetFramework="net47" />
<package id="NLog" version="4.4.12" targetFramework="net47" />
<package id="Portable.BouncyCastle" version="1.8.1.3" targetFramework="net47" />
</packages>
and this is my app.config file:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<sectionGroup name="common">
<section name="logging" type="Common.Logging.ConfigurationSectionHandler, Common.Logging" />
</sectionGroup>
<section name="nlog" type="NLog.Config.ConfigSectionHandler, NLog"/>
</configSections>
<common>
<logging>
<factoryAdapter type="Common.Logging.NLog.NLogLoggerFactoryAdapter, Common.Logging.NLog4412">
<arg key="configType" value="INLINE" />
</factoryAdapter>
</logging>
</common>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<targets>
<target name="console" xsi:type="Console" layout="${date:format=HH\:MM\:ss} ${logger} ${message}" />
</targets>
<rules>
<logger name="*" minlevel="Info" writeTo="console" />
</rules>
</nlog>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7" />
</startup>
</configuration>
Probably I need to setup a license key, but I'd like to get error message saying that I must so.
My question is:How should I correctly setup NLog with Common.Logging to get errors from iText7.
Here is full example that can be used to verify current behavior:
using Common.Logging;
using Common.Logging.Configuration;
using Common.Logging.Simple;
using iText.Kernel.Colors;
using iText.Kernel.Geom;
using iText.Kernel.Pdf;
using iText.PdfCleanup;
using System;
using System.Collections.Generic;
using System.IO;
namespace RedactTest
{
class Program
{
static void Main(string[] args)
{
NameValueCollection properties = new NameValueCollection
{
["showDateTime"] = "true",
["level"] = "All"
};
LogManager.Adapter = new ConsoleOutLoggerFactoryAdapter(properties);
using (Stream inputStream = new FileStream("D:\\test.pdf", FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
PdfReader reader = new PdfReader(inputStream);
using (Stream outputStream = new FileStream("D:\\test_redact.pdf", FileMode.Create))
{
PdfWriter writer = new PdfWriter(outputStream);
PdfDocument pdfDocument = new PdfDocument(reader, writer);
List<PdfCleanUpLocation> cleanUpLocations = new List<PdfCleanUpLocation>
{
new PdfCleanUpLocation(1, new Rectangle(40f, 650f, 200f, 700f),ColorConstants.GRAY),
new PdfCleanUpLocation(1, new Rectangle(40f, 550f, 200f, 590f),ColorConstants.GRAY),
new PdfCleanUpLocation(1, new Rectangle(344f, 650f, 550f, 724f),ColorConstants.GRAY)
};
PdfCleanUpTool cleaner = new PdfCleanUpTool(pdfDocument, cleanUpLocations);
cleaner.CleanUp();
}
}
Console.Write("OK");
Console.ReadLine();
}
}
}

On the original logging related question
One option is to activate the console logger from code, at the start of your program put:
// create properties
NameValueCollection properties = new NameValueCollection();
properties["showDateTime"] = "true";
properties["level"] = "All";
// set Adapter
Common.Logging.LogManager.Adapter = new Common.Logging.Simple.ConsoleOutLoggerFactoryAdapter(properties);
E.g. for the following test
[Test]
public void CreateLogOutput()
{
// create properties
NameValueCollection properties = new NameValueCollection();
properties["showDateTime"] = "true";
properties["level"] = "All";
// set Adapter
Common.Logging.LogManager.Adapter = new Common.Logging.Simple.ConsoleOutLoggerFactoryAdapter(properties);
ILog logger = LogManager.GetLogger(typeof(iText.Kernel.Pdf.PdfReader));
logger.Error("Testing an error log output", new Exception("The exception message"));
}
one gets an output like this:
27.06.2018 17:07:37 [ERROR] iText.Kernel.Pdf.PdfReader - Testing an error log output
=======================================================(inner most exception)===
(1) System.Exception
================================================================================
Method : <unavailable>
Type : <unavailable>
Assembly : <unavailable>
Assembly Path : <unavailable>
Source :
Thread : 15 'NonParallelWorker'
Helplink :
Message:
"The exception message"
Stack Trace:
================================================================================
On the actual issue
After you added the code to the question, the issue became clear: You forgot to close the PdfDocument pdfDocument. Thus, everything works alright, nothing is logged, merely the changes are not written to file as the PDF document object is not closed. Simply close it after the cleaner.CleanUp() call:
PdfCleanUpTool cleaner = new PdfCleanUpTool(pdfDocument, cleanUpLocations);
cleaner.CleanUp();
pdfDocument.Close();
The result now is some 34KB in size and displays like this:

How to add content file to Wix installer

<?xml version="1.0" encoding="UTF-8"?>
<Wix xmlns="http://schemas.microsoft.com/wix/2006/wi">
<Product Id="*" Name="MyApp" Language="1033" Version="1.0.0.0" Manufacturer="MyAppDev" UpgradeCode="067ac37f-0d36-4173-a24a-5037927bd6da">
<Package InstallerVersion="200" Compressed="yes" InstallScope="perMachine" />
<MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
<MediaTemplate />
<Feature Id="ProductFeature" Title="MyApp" Level="1">
<ComponentGroupRef Id="ProductComponents" />
</Feature>
</Product>
<Fragment>
<Directory Id="TARGETDIR" Name="SourceDir">
<Directory Id="ProgramFilesFolder">
<Directory Id="INSTALLFOLDER" Name="MyApp" />
</Directory>
</Directory>
</Fragment>
<Fragment>
<ComponentGroup Id="ProductComponents" Directory="INSTALLFOLDER">
<!-- TODO: Remove the comments around this Component element and the ComponentRef below in order to add resources to this installer. -->
<!-- <Component Id="ProductComponent"> -->
<!-- TODO: Insert files, registry keys, and other resources here. -->
<!-- </Component> -->
<Component>
<File Source="$(var.MyApp.TargetPath)" />
</Component>
<Component>
<File Id="Postcodes.txt" Source="C:\Project\MyApp\MyApp\Files\Postcodes.txt" KeyPath="yes" />
</Component>
</ComponentGroup>
<Feature Id="MainApplication" Title="Main Application" Level="1">
<ComponentRef Id="Postcodes.txt" />
</Feature>
</Fragment>
</Wix>
My Windows form application using a text file which is stored in application directory. And with the help of WIX toolset. I have created an installer But the problem is content text file not exist. That's why i am getting File not found exception.
Please help me, How can i add this content text file to WIX installer? Or what would i need to add "Product.wxs" file?

You need to add a custom action. This is a direct copy of my work minus the company name that it was produced for.
<CustomAction Id="RestAction" BinaryKey="myCompanyAgentSetup.WixExtension.Package.dll" DllEntry="Execute" Execute="immediate" Return="check" />
This is a class file \ dll that is created in the Wix project. This is my actual dll \ class file
using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using Microsoft.Deployment.WindowsInstaller;
namespace myCompanyAgentSetup.WixExtension
{
public static class myCompanyAgentSetupWixExtension
{
[CustomAction]
public static ActionResult Execute(Session session)
{
var errorMsg = string.Empty;
var record = new Record();
var token = Environment.GetEnvironmentVariable("RX_JOB_NO");
var restUser = session["RESTUSER"];
var restPass = session["RESTPASS"];
var restUrl = string.Format(session["RESTURL"], token);
var request = (HttpWebRequest)WebRequest.Create(restUrl);
var encoded = Convert.ToBase64String(Encoding.Default.GetBytes(restUser + ":" + restPass));
request.Headers.Add(HttpRequestHeader.Authorization, "Basic " + encoded);
request.Credentials = new NetworkCredential(restUser, restPass);
Console.WriteLine("attempting to get API Key");
try
{
var response = (HttpWebResponse)request.GetResponse();
if (response.StatusCode.ToString() != "OK")
{
record = new Record
{
FormatString = string.Format(response.StatusDescription)
};
session.Message(InstallMessage.Error, record);
Console.WriteLine("Unable to get API Key");
Console.WriteLine("Adding RX_CLOUDBACKUP_API Environment Variable with no value");
UpdateConfigFiles("");
}
else
{
var apiKey = new StreamReader(response.GetResponseStream()).ReadToEnd();
if (apiKey.Contains("Error"))
{
record = new Record
{
FormatString = string.Format(apiKey)
};
session.Message(InstallMessage.Error, record);
session.Message(InstallMessage.Terminate, record);
}
Console.WriteLine("Adding RX_CLOUDBACKUP_API with value - " + apiKey);
UpdateConfigFiles(apiKey);
return ActionResult.Success;
}
}
catch (Exception e)
{
record = new Record
{
FormatString = string.Format(e.Message)
};
session.Message(InstallMessage.Error, record);
session.Message(InstallMessage.Terminate, record);
}
//An error has occurred, set the exception property and return failure.
session.Log(errorMsg);
session["CA_ERRORMESSAGE"] = errorMsg;
record = new Record
{
FormatString = string.Format("Something has gone wrong!")
};
session.Message(InstallMessage.Error, record);
session.Message(InstallMessage.Terminate, record);
return ActionResult.Failure;
}
private static void UpdateConfigFiles(string apiKey)
{
if (!string.IsNullOrEmpty(apiKey))
{
Environment.SetEnvironmentVariable("RX_CLOUDBACKUP_API", null, EnvironmentVariableTarget.Machine);
Environment.SetEnvironmentVariable("RX_CLOUDBACKUP_API", apiKey, EnvironmentVariableTarget.Machine);
}
else
{
Environment.SetEnvironmentVariable("RX_CLOUDBACKUP_API", "", EnvironmentVariableTarget.Machine);
}
}
}
}
Hopefully this will get you going. If you need anything else let me know