Develop Reference

AppMetrics how to set application name?

I implemented App.Metrics into my wcf application (App.Metrics ver 3.1.0).
When I check url in which data is uploaded I found that app isn't filled:
Tried to figured out reason of this behavior I found manual:
https://www.app-metrics.io/getting-started/fundamentals/tagging-organizing/
It said that AssemblyName needs to be filled, but I double-checked it - csproj file contain next row:
<AssemblyName>MyWebService</AssemblyName>
How can I fill this app property in metrics?

startup.cs:
var metrics = MetricsProvider.Instance.Metrics;
SetMetricsAppTag(metrics, Assembly.GetExecutingAssembly().GetName().Name);
private static void SetMetricsAppTag(IMetricsRoot metricsRoot, string appTagValue)
{
if (!metricsRoot.Options.GlobalTags.ContainsKey("app"))
{
metricsRoot.Options.GlobalTags.Add("app", appTagValue);
}
else if (string.IsNullOrEmpty(metricsRoot.Options.GlobalTags["app"]) || metricsRoot.Options.GlobalTags["app"] == "unknown")
{
metricsRoot.Options.GlobalTags["app"] = appTagValue;
}
}

a better way will be to do in startup-
var metrics = AppMetrics.CreateDefaultBuilder().
Configuration.
Configure(options => options.AddAppTag(appName: "nexus"))
.Build();
services.AddMetrics(metrics);
services.AddMetricsTrackingMiddleware();
services.AddMetricsEndpoints(opt =>
{
opt.MetricsTextEndpointOutputFormatter = new MetricsPrometheusTextOutputFormatter();
opt.MetricsEndpointOutputFormatter = new MetricsPrometheusProtobufOutputFormatter();
opt.EnvironmentInfoEndpointEnabled = false;
});

How do I find the data type of an AD attribute not having a value

I am struggling to find the data type of AD attributes that are not having a value already.
Thus far a resulting DirecoryEntry only contains a property for attributes that already have a value. I can't find a method to obtain information about all other attributes.
Adding a value to the 'PropertiesToLoad' doesn't seem to do anything. The returned DirectoryEntry object contains all attributes (with values) regardless of what is added here.
Code used:
public void Test(string ldapPath)
{
Type orgType;
try
{
using (DirectoryEntry searchRoot = GetSearchRoot(ldapPath))
{
using (DirectorySearcher search = new DirectorySearcher(searchRoot))
{
search.Filter = "(&(objectCategory=person)(objectClass=user)(sAMAccountName=coen))";
search.PropertiesToLoad.Add("msExchHomeServerName");
SearchResult searchResult = search.FindOne();
{
using (DirectoryEntry entry = searchResult.GetDirectoryEntry())
{
if (entry != null)
{
if (entry.Properties.Contains("msExchHomeServerName"))
{
orgType = entry.Properties["msExchHomeServerName"].GetType();
}
else // The value is empty and NOT present in the current 'entry.Properties' object.
{
throw new Exception("Unknown type");
}
}
}
}
}
}
}
catch (Exception e)
{
<handle exception>
}
}
Is there a way to find the data type of the 'msExchHomeServerName' (or any of the 'empty' attributes) attribute?
Any help would be highly appreciated!
Coen

Active Directory has a schema. Obvious to say, not obvious to think about since, by default, you cannot explore it.
However, you can Register the Active Directory Schema MMC Snap-In1 and then, in a fresh instance of MMC, add that Snap-In.
This then allows you to explore the Classes and Attributes that make up your current AD schema (and add new classes/attributes if you know what you're doing and choose to do so).
msExchHomeServerName can then be discovered to be a "Unicode String", which means a plain string from C# should be acceptable. Note also that some types (particularly numeric ones) may also specify Minimums and Maximums which should be observed.
You can also explore the schema programatically via the ActiveDirectorySchema class, by e.g. calling ActiveDirectorySchema.GetCurrentSchema(); and then explore from there.
1I cannot remember if you need to have installed the general Domain Admin tools (such as Users and Computers) in order for that DLL to exist on your system.

Thanks to Damien_The_Unbeliever who pointed me in the right direction, I managed to create the following method:
public Dictionary<string, ActiveDirectorySyntax> GetAttributeSyntaxes(List<string> lstAttributeNames)
{
Dictionary<string, ActiveDirectorySyntax> dictRes = new Dictionary<string, ActiveDirectorySyntax>();
if (lstAttributeNames.Count > 0)
{
DirectoryContext directoryContext = new DirectoryContext(DirectoryContextType.DirectoryServer,
m_Server, m_UserName, m_Password);
using (ActiveDirectorySchema currentSchema = ActiveDirectorySchema.GetSchema(directoryContext))
{
using (ActiveDirectorySchemaClass objClass = currentSchema.FindClass("user"))
{
if (objClass != null)
{
ReadOnlyActiveDirectorySchemaPropertyCollection propcol = objClass.GetAllProperties();
foreach (ActiveDirectorySchemaProperty schemaProperty in propcol)
{
foreach (string attrName in lstAttributeNames)
{
if (schemaProperty.Name.Equals(attrName))
{
dictRes.Add(attrName, schemaProperty.Syntax);
break;
}
}
}
}
}
}
}
return dictRes;
}
The returned 'schemaProperty.Syntax' contains sufficient information to determine the actual data type.
Thanks Damien!

How to use Rx to monitor a project file and files for external changes?

I would like to reproduce the behavior of Visual Studio which informs you when a project file is touched externally and proposes to reload it!
Due to the requirements, I believe reactive is a great match to solve that problem.
I am using a modified reactive FileSystemWatcher described in this post: http://www.jaylee.org/post/2012/08/26/An-update-to-matthieumezil-Rx-and-the-FileSystemWatcher.aspx
public class FileWatcher
{
private static readonly ILog Logger = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
public static IObservable<FileChanged> ObserveFolderChanges(string path, string filter, TimeSpan throttle, Predicate<string> isPartOfProject)
{
return Observable.Create<FileChanged>(
observer =>
{
var fileSystemWatcher = new FileSystemWatcher(path, filter) { EnableRaisingEvents = true, IncludeSubdirectories = true };
var sources = new[]
{
Observable.FromEventPattern<FileSystemEventArgs>(fileSystemWatcher, "Created")
.Where(IsMaybeAProjectFile)
.Select(ev => new FileChanged(ev.EventArgs.FullPath, FileChangeTypes.Added, SourceChangeTypes.FileSystem)),
Observable.FromEventPattern<FileSystemEventArgs>(fileSystemWatcher, "Deleted")
.Where(IsMaybeAProjectFile)
.Select(ev => new FileChanged(ev.EventArgs.FullPath, FileChangeTypes.Deleted, SourceChangeTypes.FileSystem))
};
return sources.Merge()
.Throttle(throttle)
.Do(changed =>
{
if (Logger.IsDebugEnabled)
{
Logger.Debug($"FileWatcher event [{changed.FileChangeType}] {changed.FullPath}");
}
})
.Finally(() => fileSystemWatcher.Dispose())
.Subscribe(observer);
}
);
}
private static bool IsMaybeAProjectFile(EventPattern<FileSystemEventArgs> ev)
{
return ev.EventArgs.FullPath.EndsWith(".zip") || ev.EventArgs.FullPath.EndsWith(".skye");
}
}
public class FileChanged
{
public string FullPath { get; }
public FileChangeTypes FileChangeType { get; }
public SourceChangeTypes SourceChangeType { get; }
public FileChanged(string fullPath, FileChangeTypes fileChangeType, SourceChangeTypes sourceChangeType)
{
FullPath = fullPath;
FileChangeType = fileChangeType;
SourceChangeType = sourceChangeType;
}
}
[Flags]
public enum FileChangeTypes
{
Added = 1,
Deleted = 2
}
[Flags]
public enum SourceChangeTypes
{
FileSystem = 1,
Project = 2
}
Now in my application I created an event
private ProjectChangedEventHandler ProjectChanged { get; set; }
private void OnProjectChanged(FileChanged fileChanged)
{
ProjectChanged?.Invoke(this, fileChanged);
}
public delegate void ProjectChangedEventHandler(object sender, FileChanged fileChanged);
Which is used like this when I delete or a add a file from the project
OnProjectChanged(new FileChanged(archive.Filename, FileChangeTypes.Deleted, SourceChangeTypes.Project));
OnProjectChanged(new FileChanged(archive.Filename, FileChangeTypes.Added, SourceChangeTypes.Project));
Now I can start to leverage those two streams and with a join (which needs fine tuning for the left and right duration selector) I am able to detect which file was modified by my application:
private void ObserveProjectModifications(string projectFilePath)
{
_observeFolderChanges = FileWatcher.ObserveFolderChanges(Path.GetDirectoryName(projectFilePath), "*.*", TimeSpan.FromMilliseconds(500), IsPartOfProject);
_observeProjectChanges = Observable.FromEventPattern<ProjectChangedEventHandler, FileChanged>(h => ProjectChanged += h, h => ProjectChanged -= h).Select(pattern => pattern.EventArgs);
_changes = _observeProjectChanges.Join(_observeFolderChanges, _ => Observable.Never<Unit>(), _ => Observable.Never<Unit>(), ResultSelector).Where(changed => IsPartOfProject(changed.FullPath));
}
private FileChanged ResultSelector(FileChanged fileChanged, FileChanged projectChanged)
{
if (Logger.IsDebugEnabled)
{
Logger.Debug($"ResultSelector File [{fileChanged.FileChangeType}] {fileChanged.FullPath} # Project [{projectChanged.FileChangeType}] {projectChanged.FullPath}");
}
if (fileChanged.FullPath == projectChanged.FullPath)
{
if (fileChanged.FileChangeType == projectChanged.FileChangeType)
{
if (fileChanged.SourceChangeType != projectChanged.SourceChangeType)
{
return projectChanged;
}
return fileChanged;
}
return fileChanged;
}
return fileChanged;
}
private bool IsPartOfProject(string fullPath)
{
if (_projectFileManager.ProjectFilePath.Equals(fullPath)) return true;
return _archives.Values.Any(a => a.Filename.Equals(fullPath));
}
My issue is that I also want to know that a file was modified externally! Any idea would be really helpful! Thanks

Unfortunatelly the FileSystemWatcher doesn't provide information which process has modified the file, so you are bit out of luck there. There are few possibilities that I can think of:
Ignore flag - When your application is doing a change you can set a flag and ignore the events when the flag is set. This is the simplest way, but you might miss some external change if it happens concurrently when the flag is set and also it gets even more complicated due to throttling you have.
Tagging the file - whenever you do a change to the file you generate a guid (or similar) which you will use to tag the file. And then whenever the file change is fired, you check the file property (can be stored either as real filesystem file property - similar for example to jpeg metadata you see in details in file explorer, there are more ways to set such file property) and then if the tag is different from what you have or is missing then you know it is external - there you need to also take care due to throttling and the tag being outdated etc
Minifilter file system driver - This would be the cleanest solution and probably is very close to what Visual studio is using - just a guess though. It is basically a universal windows driver that monitors any I/O change. Microsoft has created reference implementation called minispy, which is small tool to monitor and log any I/O and transaction activity that occurs in the system. You don't have to implement the driver yourself as there is already a 3rd party FileSystemWatcher implemented using this approach on github. That file system watcher provides information which process has modified the file. The only problem here is that the driver itself needs to be installed, before it can be used, so you need admin privileged installer of sort.
At the moment that's all I can think of.

Which is the best way to use the Culture Globalization for winforms c#

I want to make my application which supports all the languages based on the resx file.
If not resx file is available it has to take the default language from the display language set in the control panel. How can I do this? Which is the best way to do it?

You can't.
The default language in the control panel is the language that is going to be used automatically (unless you change the UI culture).
However, what do you expect the application to do if the default windows language cannot be found?
You have to create a resource file which do not have the language suffix (just yourResource.resx and not yourResource.fi.resx). The resource files without the prefix will be used if the chosen language is not found.

Can't we do like this:
using System.Xml.Linq;
class ExternalRMStrings
{
public static bool allAtOnce = true;
//static string path = #"C:\WOI\Code\VC Days are here again\Ode to Duty\WinForms\Globalization\MultiLingual\MultiLingual\Resource_Hindi.resx";
//#"d:\Resources.resx";
static string path = #"C:\WOI\Code\VC Days are here again\Ode to Duty\WinForms\Globalization\MultiLingual\MultiLingual\Properties\Resources.resx";
static XElement xelement = XElement.Load(path);
static IEnumerable<XElement> employees = null;
static Dictionary<string, string> dicOfLocalizedStrings = new Dictionary<string, string>();
static void LoadAllAtOnce()
{
if (employees == null) employees = xelement.Elements();
employees.Where(e => e.Name == "data").Select(x => x).All(xele =>
{
dicOfLocalizedStrings[xele.Attribute("name").Value] = xele.Element("value").Value;
return true;
});
}
public static string GetString(string key)
{
if (employees == null) employees = xelement.Elements();
if (allAtOnce) LoadAllAtOnce();
try
{
string sibla = null;
if (dicOfLocalizedStrings.TryGetValue(key, out sibla)) return sibla;
sibla = employees.Where(e => e.Name == "data" && e.Attribute("name").Value == key).Select(x => x.Element("value").Value).FirstOrDefault();
dicOfLocalizedStrings[key] = sibla;
return sibla;
}
catch
{
return null;
}
}
}
Useage
ExternalRMStrings.GetString("MyKey");

Is it possible to execute C# code represented as string?

On my form I have a button click
private void button1_Click(object sender, EventArgs e)
{
do something
}
How on the click would I load my do something from a text file, for example my text file looks like this:
MessageBox.Show("hello");
label1.Text = "Hello";
on click it does everything in my text file, if possible.

Here is a very simple example, just to prove this is possible. Basically, you use CodeDomProvider to compile source at runtime, then execute using reflection.
var provider = CodeDomProvider.CreateProvider("C#");
string src=#"
namespace x
{
using System;
public class y
{
public void z()
{
Console.WriteLine(""hello world"");
}
}
}
";
var result = provider.CompileAssemblyFromSource(new CompilerParameters(), src);
if (result.Errors.Count == 0)
{
var type = result.CompiledAssembly.GetType("x.y");
var instance = Activator.CreateInstance(type);
type.GetMethod("z").Invoke(instance, null);
}
Edit
As #Agat points out, the OP seems to require a sort of scripting framework (it makes use of label1, a property of the current object), whereas my answer above obviously does not provide that. The best I can think of is a limited solution, which would be to require dependencies to be specified explicitly as parameters in the "script". Eg, write the scripted code like this:
string src = #"
namespace x
{
using System.Windows;
public class y
{
public void z(Label label1)
{
MessageBox.Show(""hello"");
label1.Text = ""Hello"";
}
}
}
";
Now you can have the caller examine the parameters, and pass them in from the current context, again using reflection:
var result = provider.CompileAssemblyFromSource(new CompilerParameters(), src);
if (result.Errors.Count == 0)
{
var type = result.CompiledAssembly.GetType("x.y");
var instance = Activator.CreateInstance(type);
var method = type.GetMethod("z");
var args = new List<object>();
// assume any parameters are properties/fields of the current object
foreach (var p in method.GetParameters())
{
var prop = this.GetType().GetProperty(p.Name);
var field = this.GetType().GetField(p.Name);
if (prop != null)
args.Add(prop.GetValue(this, null));
else if (field != null);
args.Add(field.GetValue(this));
else
throw new InvalidOperationException("Parameter " + p.Name + " is not found");
}
method.Invoke(instance, args.ToArray());
}

Like the other answers have stated, it isn't an easy thing to implement and can possibly be done through reflection depending on how advanced your scripts are.
But no one #BrankoDimitrijevic mentioned Roslyn and it is a great tool. http://msdn.microsoft.com/en-us/vstudio/roslyn.aspx
It hasn't been updated in quite awhile (Sept.2012) and doesn't have all of the features of C# implemented, however, it did have a lot of it implemented when I played around with this release.
By adding your assembly as a reference to the scripting session, you're able to gain access to all of your assembly's types and script against them. It also supports return values so you can return any data that a scripted method generates.
You can find what isn't implemented here.
Below is a quick and dirty example of Roslyn that I just wrote and tested. Should work right out of box after installing Roslyn from NuGet. The small bloat at the initialization of the script engine can easily be wrapped up in a helper class or method.
The key is passing in a HostObject. It can be anything. Once you do, your script will have full access to the properties. Notice that you just call the properties and not the host object in the script.
Basically, your host object will contain properties of the data you need for your script. Don't necessarily think of your host object as just a single data object, but rather a configuration.
public class MyHostObject
{
public string Value1 { get; set; }
public string Value2 { get; set; }
}
public class RoslynTest
{
public void Test()
{
var myHostObject = new MyHostObject
{
Value1 = "Testing Value 1",
Value2 = "This is Value 2"
};
var engine = new ScriptEngine();
var session = engine.CreateSession(myHostObject);
session.AddReference(myHostObject.GetType().Assembly.Location);
session.AddReference("System");
session.AddReference("System.Core");
session.ImportNamespace("System");
// "Execute" our method so we can call it.
session.Execute("public string UpdateHostObject() { Value1 = \"V1\"; Value2 = \"V2\"; return Value1 + Value2;}");
var s = session.Execute<string>("UpdateHostObject()");
//s will return "V1V2" and your instance of myHostObject was also changed.
}
}

No. You can not.
At least in any simple way.
The thing you want is something like eval('do something') from javascript.
That's not possible to do with C#. C# is a language which needs compilation before execution unlike javascript (for instance).
The only way to implement that is to build your own (pretty complicated as for beginner) parser and execute it in such way.
UPDATED:
Actually, as JDB fairly noticed, that's really not the only way. I love programming! There are so many ways to make a freakky (or even sometimes that really can be necessary for some custom interesting tasks (or even learning)!) code. he he
Another approach I've got in my mind is building some .cs file, then compiling it on-the-fly and working with it as some assembly or some other module. Right.