what do I have to reference in Windows Phone 8.1 project under Visual Studio 2015 for Linq, ObservableCollection etc.?
I'm getting this error, but only in the Watch window!:
groups error CS0012: The type 'IGrouping<,>' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
But this assembly is not builded for Windows Universal Apps. So what assembly package should I reference? Same is for the ObservableCollection<>
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.UI;
namespace GoodCode.GTDApp.Models
{
public class PageModel
{
public ObservableCollection<ItemModel> Items { get; set; }
public PageModel()
{
this.Items = new ObservableCollection<ItemModel>();
this.Items.CollectionChanged += Items_CollectionChanged;
}
private void Items_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
var groups = this.Items.GroupBy(s => s.Date);
foreach (var group in groups.OrderByDescending(s => s.First().Date))
{
foreach (var item in group)
{
item.Color = Colors.Red;
}
}
}
}
}
Related
As the title describes I am having trouble getting CPU temps using the openhardwaremonitor.dll reference. I think I am running the program as an admin, I select run as admin when starting visual studio because I do not have the option to add an application.manifest file. This is the code I am using;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using OpenHardwareMonitor.Hardware;
namespace Get_CPU_Temp5
{
class Program
{
public class UpdateVisitor : IVisitor
{
public void VisitComputer(IComputer computer)
{
computer.Traverse(this);
}
public void VisitHardware(IHardware hardware)
{
hardware.Update();
foreach (IHardware subHardware in hardware.SubHardware) subHardware.Accept(this);
}
public void VisitSensor(ISensor sensor) { }
public void VisitParameter(IParameter parameter) { }
}
static void GetSystemInfo()
{
UpdateVisitor updateVisitor = new UpdateVisitor();
Computer computer = new Computer();
computer.Open();
computer.CPUEnabled = true;
computer.Accept(updateVisitor);
for (int i = 0; i < computer.Hardware.Length; i++)
{
if (computer.Hardware[i].HardwareType == HardwareType.CPU)
{
for (int j = 0; j < computer.Hardware[i].Sensors.Length; j++)
{
if (computer.Hardware[i].Sensors[j].SensorType == SensorType.Temperature)
Console.WriteLine(computer.Hardware[i].Sensors[j].Name + ":" + computer.Hardware[i].Sensors[j].Value.ToString() + "\r");
}
}
}
computer.Close();
}
static void Main(string[] args)
{
while (true)
{
GetSystemInfo();
}
}
}
}
Error;
"System.IO.FileNotFoundException: 'Could not load file or assembly 'System.Management, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.'"
This error is at computer.Open();
I am using visual studio 2019.
Any help will be greatly appreciated!
I just ran into this issue with trying to use openhardwaremonitor.dll with .Net core. The fix I found was to load system.management from Nuget. Apparently the system.management assemblies are not included in .net core like they are with .net Framework.
I'm trying to learn and play a bit with Xamarin :)
I wanted to play a simple sound at the end of a certain time and in part I succeeded, this works on the android and ios emulators but when I try to build the app on my iPhone this crush at the moment of sound reproduction!
the code I wrote I copied from here!
so my code is this:
iAudio.cs :
using System;
namespace StopWatch
{
public interface IAudio
{
void PlayAudioFile(string fileName);
}
}
AudioService.cs in Android :
using System;
using Xamarin.Forms;
using StopWatch.Droid;
using Android.Media;
using Android.Content.Res;
[assembly: Dependency(typeof(AudioService))]
namespace StopWatch.Droid
{
public class AudioService : IAudio
{
public AudioService()
{ }
public void PlayAudioFile(string fileName)
{
var player = new MediaPlayer();
var fd = global::Android.App.Application.Context.Assets.OpenFd(fileName);
player.Prepared += (s, e) =>
{
player.Start();
};
player.SetDataSource(fd.FileDescriptor, fd.StartOffset, fd.Length);
player.Prepare();
}
}
}
AudioService.cs in iOS:
using System; using Xamarin.Forms; using StopWatch; using StopWatch.iOS; using System.IO; using Foundation; using AVFoundation; [assembly: Dependency(typeof(AudioService))] namespace StopWatch.iOS {
public class AudioService : IAudio
{
public AudioService()
{ }
public void PlayAudioFile(string fileName)
{
string sFilePath = NSBundle.MainBundle.PathForResource(Path.GetFileNameWithoutExtension(fileName), Path.GetExtension(fileName));
NSUrl url = NSUrl.FromString(sFilePath);
var _player = AVAudioPlayer.FromUrl(url);
_player.FinishedPlaying += (object sender, AVStatusEventArgs e) =>
{
_player = null;
};
_player.Play();
}
}
}
and this is mi MainPage.xaml.cs :
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using Xamarin.Forms;
namespace StopWatch
{
// Learn more about making custom code visible in the Xamarin.Forms previewer
// by visiting https://aka.ms/xamarinforms-previewer
[DesignTimeVisible(false)]
public partial class MainPage : ContentPage
{
Stopwatch stopwatch;
public MainPage()
{
InitializeComponent();
stopwatch = new Stopwatch();
lblStopWatch.Text = "00:00:00";
lblStopWatchAllert.Text = "";
}
private void btnStartClicked(object sender, EventArgs e)
{
stopwatch.Start();
Device.StartTimer(TimeSpan.FromMilliseconds(10), () =>
{
lblStopWatch.Text = stopwatch.Elapsed.ToString().Substring(0, 8);
controll(lblStopWatch.Text);
return true;
});
}
private void btnStopClicked(object sender, EventArgs e)
{
stopwatch.Stop();
}
private void btnResetClicked(object sender, EventArgs e)
{
stopwatch.Reset();
}
private void controll(String time)
{
if (string.Compare(time, "00:00:03:0000") > 0)
{
stopwatch.Reset();
lblStopWatchAllert.Text = "time is over!";
DependencyService.Get<IAudio>().PlayAudioFile("Alert.mp3");
}
}
}
}
the code crashes me at this point of the iOS AudioService.cs file:
I think the problem lies in the info.plist (although I am most likely wrong) but I don't know how to solve it :(
can someone help me? thank you
I have checked this code , it works in my site . Invoking the play method as follow :
DependencyService.Get<IAudio>().PlayAudioFile("Alan_Walker.mp3");
The other codes are the same with yours in iOS and Android , they all play the sound successfully.
Here you need to notice that ,the local sound file should be added to each platform .And each platform has its specical folder to put the auido file .
In Android , you need to put it in Assets folder as follow :
And in iOS , you need to put it in Resources folder as follow :
==========================Update===================================
You should first add file to this folder as follow :
Then add Existing file to this folder :
Then when installing app , this filw will be added to mobile . No matter what is a simulator or a physical device.
Note :
Not copying file from other path to Xamarin.iOS project , this can't make sure the file be added to the project .
I have C# solution with 2 project:
DLLTest (Console app)
BLib (library)
In DLLTest I set reference to BLib and set Copy Local property to false.
Compile solution.
Copy BLib.dll to 'C:\BLib.dll' and run application.
In first step in my code I load Assembly from path 'C:\BLib.dll' then invoke method from there. On invoking method from BLib assembly fire AssemblyResolver and try load assembly which I loaded before manually.
Can I do something that application to know that the library has already been loaded and not try load it again?
This is BClass.cs file from BLib project:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace BLib
{
public class BClass
{
public static void PrintName()
{
Console.WriteLine("BLib");
}
}
}
This is Program.cs file from DLLTest project:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
namespace DLLTest
{
class Program
{
static void Main(string[] args)
{
AppDomain.CurrentDomain.AssemblyResolve += CurrentDomain_AssemblyResolve;
Assembly.LoadFile(#"C:\BLib.dll");
Console.WriteLine("Loaded assembles:");
AppDomain.CurrentDomain.GetAssemblies().ToList()
.ForEach(p => Console.WriteLine(p));
Console.WriteLine("End list of assembles");
try
{
PrintMessage();
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.ReadKey();
}
private static void PrintMessage()
{
BLib.BClass.PrintName();
}
private static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
{
Console.WriteLine(args.Name);
return null;
}
}
}
I find similar question Why is AssemblyResolve called when Assembly is in CurrentDomain? Answer from there follow me to Choosing a Binding Context where everything was detailed described (row Neither column Disadvantages).
That I think so, this is security reason.
I need to compile via csc.exe this code:
using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using Scripting;
namespace ConsoleApplication13
{
class Program
{
static void Main(string[] args)
{
Scripting.FileSystemObject fso = new Scripting.FileSystemObject();
Scripting.Folder folder = fso.GetFolder(#"E:\backup_SQL_Planet\");
Int64 dirSize = (Int64)folder.Size;
string abc = Convert.ToString(dirSize);
Console.WriteLine(abc);
}
}
}
when i execute csc.exe there was a problem with reference of (using Scripting;)
How do I reference using Scripting?
I just get an error each time I run this code:
AppDomain newDomain = AppDomain.CreateDomain("newDomain");
AssemblyName assemblyName = AssemblyName.GetAssemblyName(path);
Command cmd = (Command)newDomain.CreateInstanceAndUnwrap(assemblyName.FullName, typename);
cmd.Execute();
Where path is the path of the Dll and typename is "NWT_Projekt.TestClass"
My command class:
using System;
namespace NWT_Projekt
{
public interface Command
{
void Execute();
}
}
and this is the source code of the DLL
using System;
using System.Collections;
using System.Xml;
using System.IO;
using System.Windows.Forms;
namespace NWT_Projekt
{
public class TestClass : NWT_Projekt.Command
{
public MainForm f;
public TestClass()
{
f = Form.ActiveForm as MainForm;
}
public void Execute()
{
//do something
}
}
}
ERROR (google translator :D)
An exception of type "System.Runtime.Serialization.SerializationException 'occurred in NWT PRojekt.exe.
Additional information: The type "NWT_Projekt.TestClass' in Assembly 'scripts, Version = 0.0.0.0, Culture = neutral, PublicKeyToken = null' is not marked as serializable.
EDIT2:
With the [Serializable] it works now, but after I run the code one time and then I want to create a second dll it gives me an IO error, because the file is in use!
How can I fix this?
If you want your command to run on its own appDomain, you should use MarshalByRefObject.
using System;
using System.Collections;
using System.Xml;
using System.IO;
using System.Windows.Forms;
namespace NWT_Projekt
{
public class TestClass : MarshalByRefObject, NWT_Projekt.Command
{
public MainForm f;
public TestClass()
{
f = Form.ActiveForm as MainForm;
}
public void Execute()
{
//do something
}
}
}
I advice you to prefix your interfaces : ICommand