How can I print in my log the version of the program that is running?
In other words, can I access AssemblyFileVersion using Console.WriteLine?
Thanks
Tony
It looks like something like this would work:
public static string Version
{
get
{
Assembly asm = Assembly.GetExecutingAssembly();
FileVersionInfo fvi = FileVersionInfo.GetVersionInfo(asm.Location);
return String.Format("{0}.{1}", fvi.ProductMajorPart, fvi.ProductMinorPart);
}
}
From another post on SO.
// Get the version of the current application.
Assembly assem = Assembly.GetExecutingAssembly();
AssemblyName assemName = assem.GetName();
Version ver = assemName.Version;
Console.WriteLine("{0}, Version {1}", assemName.Name, ver.ToString());
More on MSDN:
Version Class
FileVersionInfo.GetVersionInfo(asm.Location) doesn't work for embedded assemblies (e.g. using Fody's Costura to ship a single EXE instead of the executable and all of it's dependent assemblies). In which case, the following works as a fallback:
var assembly = Assembly.GetExecutingAssembly();
var fileVersionAttribute = assembly.CustomAttributes.FirstOrDefault(ca => ca.AttributeType == typeof(AssemblyFileVersionAttribute));
if (fileVersionAttribute != null && fileVersionAttribute.ConstructorArguments.Any())
return fileVersionAttribute.ConstructorArguments[0].ToString().Replace("\"","");
return string.Empty;
Related
I need generate typescript files from some of my C# classes after build.
I created dotnet cli tool and added post-build event
dotnet tsgenerator "$(TargetPath)"
where $(TargetPath) is macros pointing, for example, D:\Test\bin\Release\netcoreapp2.0\my.dll
Next, i tried to load assembly next way:
public static void Main(string[] args)
{
var dllPath = args[0]; // "D:\Test\bin\Release\netcoreapp2.0\my.dll"
var assembly = Assembly.LoadFile(dllPath);
var types = assembly.GetExportedTypes(); // Throws exception
}
But i got ReflectionTypeLoadException that says Could not load file or assembly for some references assemblies (for example, Microsoft.AspNetCore.Antiforgery).
How i can load assembly for .NET Core applications?
I'm found solution at github issue. Message by amits1995 and angelcalvasp.
I'm added <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies> to my csproj and using this code to load assembly:
public static class AssemblyLoader
{
public static Assembly LoadFromAssemblyPath(string assemblyFullPath)
{
var fileNameWithOutExtension = Path.GetFileNameWithoutExtension(assemblyFullPath);
var fileName = Path.GetFileName(assemblyFullPath);
var directory = Path.GetDirectoryName(assemblyFullPath);
var inCompileLibraries = DependencyContext.Default.CompileLibraries.Any(l => l.Name.Equals(fileNameWithOutExtension, StringComparison.OrdinalIgnoreCase));
var inRuntimeLibraries = DependencyContext.Default.RuntimeLibraries.Any(l => l.Name.Equals(fileNameWithOutExtension, StringComparison.OrdinalIgnoreCase));
var assembly = (inCompileLibraries || inRuntimeLibraries)
? Assembly.Load(new AssemblyName(fileNameWithOutExtension))
: AssemblyLoadContext.Default.LoadFromAssemblyPath(assemblyFullPath);
if (assembly != null)
LoadReferencedAssemblies(assembly, fileName, directory);
return assembly;
}
private static void LoadReferencedAssemblies(Assembly assembly, string fileName, string directory)
{
var filesInDirectory = Directory.GetFiles(directory).Where(x => x != fileName).Select(x => Path.GetFileNameWithoutExtension(x)).ToList();
var references = assembly.GetReferencedAssemblies();
foreach (var reference in references)
{
if (filesInDirectory.Contains(reference.Name))
{
var loadFileName = reference.Name + ".dll";
var path = Path.Combine(directory, loadFileName);
var loadedAssembly = AssemblyLoadContext.Default.LoadFromAssemblyPath(path);
if (loadedAssembly != null)
LoadReferencedAssemblies(loadedAssembly, loadFileName, directory);
}
}
}
}
Usage:
public static void Main(string[] args)
{
var dllPath = args[0]; // "D:\Test\bin\Release\netcoreapp2.0\my.dll"
var assembly = AssemblyLoader.LoadFromAssemblyPath(dllPath);
var types = assembly.GetExportedTypes(); // No exceptions
}
Well you are able to load assembly but GetTypes() and GetExportedTypes() depend on the public classes within that assembly, if they have external references you get this exception.
Answer:
This means the Types of that assembly depend on other assembly which the current .NetCore does not have access at the run time because it can not connect to other dependent assemblies
Solution:
Get dependencies of the DLL assemblies and compile all of them, then load each assembly iteratively to get all ExportedTypes (i.e publicly visible Types)
Code:
using System;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Loader;
using Microsoft.Extensions.DependencyModel;// add this nuget
class Program
{
static void Main(string[] args)
{
var asl = new AssemblyLoader();
var asm = asl.LoadFromAssemblyPath(#"C:\temp\Microsoft.AspNetCore.Antiforgery.dll");
try
{
var y = asm.GetExportedTypes();
Console.WriteLine(y);
}
catch (Exception e1)
{
Console.WriteLine("Got exception at first attempt of GetExportedTypes ");
Console.WriteLine("\t*********" + e1.Message + "**************");
var deped = asl.CallForDependency(asm.GetName());
try
{
Console.WriteLine("\n" + deped.ToString());
Console.WriteLine("----------All Exported Types------------");
foreach (var item in deped.ExportedTypes)
{
Console.WriteLine(item);
}
}
catch (Exception e2)
{
Console.WriteLine("Got exception at second attempt of GetExportedTypes ");
Console.WriteLine("\t*********" + e2.Message + "**************");
}
}
Console.ReadLine();
}
}
public class AssemblyLoader :AssemblyLoadContext
{
protected override Assembly Load(AssemblyName assemblyName)
{
var deps = DependencyContext.Default;
var res = deps.CompileLibraries.Where(d => d.Name.Contains(assemblyName.Name)).ToList();
var assembly = Assembly.Load(new AssemblyName(res.First().Name));
return assembly;
}
public Assembly CallForDependency(AssemblyName assemblyName)
{
return this.Load(assemblyName);
}
}
Output :
Got exception at first attempt of GetExportedTypes
*********Could not load file or assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. An operation is not legal in the current state. (Exception from HRESULT: 0x80131509)**************
Microsoft.AspNetCore.Antiforgery, Version=2.1.1.0, Culture=neutral, PublicKeyToken=adb9793829ddae60
----------All Exported Types------------
Microsoft.Extensions.DependencyInjection.AntiforgeryServiceCollectionExtensions
Microsoft.AspNetCore.Antiforgery.AntiforgeryOptions
Microsoft.AspNetCore.Antiforgery.AntiforgeryTokenSet
Microsoft.AspNetCore.Antiforgery.AntiforgeryValidationException
Microsoft.AspNetCore.Antiforgery.IAntiforgery
Microsoft.AspNetCore.Antiforgery.IAntiforgeryAdditionalDataProvider
Microsoft.AspNetCore.Antiforgery.Internal.AntiforgeryFeature
Microsoft.AspNetCore.Antiforgery.Internal.AntiforgeryOptionsSetup
Microsoft.AspNetCore.Antiforgery.Internal.AntiforgerySerializationContext
Microsoft.AspNetCore.Antiforgery.Internal.AntiforgerySerializationContextPooledObjectPolicy
Microsoft.AspNetCore.Antiforgery.Internal.AntiforgeryToken
Microsoft.AspNetCore.Antiforgery.Internal.BinaryBlob
Microsoft.AspNetCore.Antiforgery.Internal.CryptographyAlgorithms
Microsoft.AspNetCore.Antiforgery.Internal.DefaultAntiforgery
Microsoft.AspNetCore.Antiforgery.Internal.DefaultAntiforgeryAdditionalDataProvider
Microsoft.AspNetCore.Antiforgery.Internal.DefaultAntiforgeryTokenGenerator
Microsoft.AspNetCore.Antiforgery.Internal.DefaultAntiforgeryTokenSerializer
Microsoft.AspNetCore.Antiforgery.Internal.DefaultAntiforgeryTokenStore
Microsoft.AspNetCore.Antiforgery.Internal.DefaultClaimUidExtractor
Microsoft.AspNetCore.Antiforgery.Internal.IAntiforgeryFeature
Microsoft.AspNetCore.Antiforgery.Internal.IAntiforgeryTokenGenerator
Microsoft.AspNetCore.Antiforgery.Internal.IAntiforgeryTokenSerializer
Microsoft.AspNetCore.Antiforgery.Internal.IAntiforgeryTokenStore
Microsoft.AspNetCore.Antiforgery.Internal.IClaimUidExtractor
Reference and explanation on ReflectionTypeLoadException:
Assembly.GetTypes Method ()
ReflectionTypeLoadException
The assembly contains one or more types that cannot be loaded. The
array returned by the Types property of this exception contains a Type
object for each type that was loaded and null for each type that could
not be loaded, while the LoaderExceptions property contains an
exception for each type that could not be loaded.
Remarks
The returned array includes nested types.
If the GetTypes method is called on an assembly and a type in that
assembly is dependent on a type in an assembly that has not been
loaded (for example, if it derives from a type in the second
assembly), a ReflectionTypeLoadException is thrown. For example, this
can happen if the first assembly was loaded with the
ReflectionOnlyLoad or ReflectionOnlyLoadFrom methods, and the second
assembly was not loaded. It can also happen with assemblies loaded
using the Load and LoadFile methods if the second assembly cannot be
located when the GetTypes method is called.
Note
If a type has been forwarded to another assembly, it is not included
in the returned array. For information on type forwarding, see Type
Forwarding in the Common Language Runtime.
Linked :
How to load assemblies located in a folder in .net core console app
How to dynamically load assemblies in dotnet core
Try the LoadFrom method for loading in the assembly, rather than LoadFile:
public static void Main(string[] args)
{
var dllPath = args[0]; // "D:\Test\bin\Release\netcoreapp2.0\my.dll"
var assembly = Assembly.LoadFrom(dllPath);
var types = assembly.GetExportedTypes(); // Throws exception
}
You will also need to add the same references that are in the ddl file to your current project, so that the types are defined.
I used to have some code which scanned the bin directory of my application for assemblies which weren't loaded in the AppDomain yet and loaded them. It basically looked like:
foreach (var assemblyPath in Directory.GetFiles("path\to\bin", "*.dll"))
{
var inspected = Assembly.ReflectionOnlyLoadFrom(assemblyPath);
Assembly.Load(inspected.GetName());
}
I skipped the try/catch clauses, etc for brevity.
This allowed me to drop assemblies in the bin folder at run-time with implementations for certain interfaces and let the IoC container pick them up automatically. Now with the new Roslyn magic, there are no physical DLL's anymore when debugging. Is there any way to retrieve assembly names, project names or dependency names (in project.json) dynamically.
I guess I have to implement something like this example in the Entropy repo, but I don't know how to implement it for my scenario.
You can use the IAssemblyLoadContextAccessor interface to load ASP.NET 5 class library (.xproj) projects dynamically. The following example code works with Beta 4:
public class Startup
{
public void Configure(IApplicationBuilder app)
{
var assemblyLoadContextAccessor = app.ApplicationServices.GetService<IAssemblyLoadContextAccessor>();
var loadContext = assemblyLoadContextAccessor.Default;
var loadedAssembly = loadContext.Load("NameOfYourLibrary");
}
}
What you are looking for is ILibraryManager implementation which provides access to the complete graph of dependencies for the application. This is already flowed through the ASP.NET 5 DI system. So, you can reach out to it from there.
Sample usage can be found inside RoslynCompilationService.
I solved this issue partly using the ILibraryManager as suggested by #tugberk. I changed the approach a bit which dropped the need of scanning the bin folder for new assemblies. I just want all the loaded assemblies in the current AppDomain.
I injected an instance of the ILibraryManager interface in my type finder class and used the GetReferencingLibraries() method with the name of the core assembly, which is referenced by all the other assemblies in the application.
A sample implementation can be found here, where this is the important part:
public IEnumerable<Assembly> GetLoadedAssemblies()
{
return _libraryManager.GetReferencingLibraries(_coreAssemblyName.Name)
.SelectMany(info => info.Assemblies)
.Select(info => Assembly.Load(new AssemblyName(info.Name)));
}
For .net core users, here is my code for loading assemblies from a specific path. I had to use directives, as it's slightly different for .Net Framework and .Net Core.
In your class header you'll need to declare the using something similar to:
#if NET46
#else
using System.Runtime.Loader;
#endif
And in your function something similar to the following:
string assemblyPath = "c:\temp\assmebly.dll";
#if NET46
Assembly assembly = Assembly.LoadFrom(assemblyPath);
#else
AssemblyLoadContext context = AssemblyLoadContext.Default;
Assembly assembly = context.LoadFromAssemblyPath(assemblyPath);
#endif
Its not ASP.NET but it can be converted easily to asp.net.
bellow if function for loading an assembly, and invoke a method inside a class on that assembly.
private static FormCustomized loadLayout(global::System.String layoutFilename, global::System.String layoutNameSpace)
{
FormCustomized mainForm = default;
Type typeMainLayout = default;
FileInfo layoutFile;
layoutFile = new FileInfo(layoutFilename);
layoutFile.Refresh();
if (!layoutFile.Exists)
{
MessageBox.Show("Layout file not found. You need to reinstall the program");
return default;
}
try
{
Assembly assemblyRaw = Assembly.LoadFrom(layoutFilename);
AssemblyLoadContext context = AssemblyLoadContext.Default;
Assembly assembly = context.LoadFromAssemblyPath(layoutFilename);
Type typeMainLayoutIni = assembly.GetType(layoutNameSpace + ".initializeLayoutClass");
Object iniClass = Activator.CreateInstance(typeMainLayoutIni, true);
MethodInfo methodInfo = typeMainLayoutIni.GetMethod("AssembliesToLoadAtStart");
enVars.assemblies = (Dictionary<string, Environment.environmentAssembliesClass>)methodInfo.Invoke(iniClass, default);
typeMainLayout = assembly.GetType(layoutNameSpace + ".mainAppLayoutForm");
mainForm = Activator.CreateInstance(typeMainLayout, enVars) as FormCustomized;
}
catch (Exception ex)
{
return default;
}
return default;
}
I try to get GUID from many assemblies.
I chose the same way as Reflector read GUID - but so far it is extremely slow process. Moreover,I receive many exceptions, when some (connected) dll files are missing
Assembly CurrentDomain_ReflectionOnlyAssemblyResolve(object sender, ResolveEventArgs args)
{
string missedAssemblyFullName = args.Name;
Assembly assembly = Assembly.ReflectionOnlyLoad(missedAssemblyFullName);
return assembly;
}
//... and code
string exe = "test.exe";
AppDomain.CurrentDomain.ReflectionOnlyAssemblyResolve +=CurrentDomain_ReflectionOnlyAssemblyResolve;
Assembly assembly = null;
if (assembly != null)
{
assembly = Assembly.ReflectionOnlyLoadFrom(exe);
if (assembly != null)
{
var test = CustomAttributeData.GetCustomAttributes(assembly);
foreach (var elem in test)
{
if (elem.AttributeType.Name == "GuidAttribute")
assemblyGuid = (string)elem.ConstructorArguments[0].Value;
}
}
}
How can I make a GUID reading process faster?
Is there any other way? I just want to open manifest file and read the same GUID which is available in AssemblyInfo.cs file [assembly: Guid("98c11478-7295-4c10-a97f-4b6805df6191")
Do I need ReflectionOnlyLoad method?
You can check out the code by Vijay Mukhi, who wrote his version of ILDASM (source code included). It parses the manifest of an assembly prett much the same way Microsoft's ILDASM does. You can then trim the code down to just the functionality you need.
Where can I set the file version comments..?
We can get it by
FileVersionInfo fv =
System.Diagnostics.FileVersionInfo.GetVersionInfo(
Assembly.GetExecutingAssembly().Location);
var comment = fv.Comments;
Then how can I set it so that I can show the same somewhere..
For .NET Assemblies you can set the File Version Comments using the AssemblyDescriptionAttribute, which you usually put in the AssemblyInfo.cs file in your project when using Visual Studio.
[assembly: AssemblyDescription("The assembly does xxx by yyy")]
For other types of executables the file version is set using a resource in the file.
The different assembly level File Version attributes maps as follows:
FileVersionInfo.Comments = AssemblyDescription
FileVersionInfo.CompanyName = AssemblyCompany
FileVersionInfo.FileDescription = AssemblyTitle
FileVersionInfo.FileVersion = AssemblyFileVersion
FileVersionInfo.LegalCopyright = AssemblyCopyright
FileVersionInfo.LegalTrademarks = AssemblyTrademark
FileVersionInfo.ProductName = AssemblyProduct
FileVersionInfo.ProductVersion = AssemblyInformationalVersion
Nowadays in .Net 6
you can set comments in*.csproj
<Description>My Comment</Description>
And get
public static string GetComments()
{
var fileName = Assembly.GetEntryAssembly()?.Location;
if (fileName == null) return String.Empty;
var versionInfo = FileVersionInfo.GetVersionInfo(fileName);
return versionInfo?.Comments ?? String.Empty;
}
To set this value, you can edit the AssemblyInfo.cs file of your project.
This line is what you are looking for:
[assembly: AssemblyDescription("This is the comment")]
I'm using the Activator to instantiate a new class based on the short name of an assembly (e.a. 'CustomModule'). It throws a FileNotFoundException, because the assembly isn't there. Is there a way to check if a certain assembly name is present?
I'm using the following code:
System.Runtime.Remoting.ObjectHandle obj =
System.Activator.CreateInstance(assemblyName, className);
The main objective is to rather test for the presence of the assembly than to wait for the exception to occur.
If you'll notice my comment to your question it will be evident that I'm not rightly sure exactly how you want or need to go about this, but until we have a more elaborate description I can only offer you this in the hope it fits well to your situation (the key is in 'searching' the assemblies):
var className = "System.Boolean";
var assemblyName = "mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089";
var assemblies = AppDomain.CurrentDomain.GetAssemblies();
var assembly = (from a in assemblies
where a.FullName == assemblyName
select a).SingleOrDefault();
if (assembly != null)
{
System.Runtime.Remoting.ObjectHandle obj =
System.Activator.CreateInstance(assemblyName, className);
}
.NET 2.0 Compatible Code
Assembly assembly = null;
var className = "System.Boolean";
var assemblyName = "mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089";
foreach (var a in AppDomain.CurrentDomain.GetAssemblies())
{
if (a.FullName == assemblyName)
{
assembly = a;
break;
}
}
if (assembly != null)
{
System.Runtime.Remoting.ObjectHandle obj =
System.Activator.CreateInstance(assemblyName, className);
}
If you want to determine whether or not the file exists before trying to load it (a good practice) then, given you have its name and know the desired location, simply try to find the file when the assembly is being resolved:
AppDomain.CurrentDomain.AssemblyResolve += new ResolveEventHandler(CurrentDomain_AssemblyResolve);
var className = "StackOverflowLib.Class1";
var assemblyName = "StackOverflowLib.dll";
var currentAssemblyPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
var obj = Activator.CreateInstance(Path.Combine(currentAssemblyPath, assemblyName), className);
static Assembly CurrentDomain_AssemblyResolve(object sender, ResolveEventArgs args)
{
var currentAssemblyPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
if (File.Exists(Path.Combine(currentAssemblyPath, args.Name)))
{
return Assembly.LoadFile(Path.Combine(currentAssemblyPath, args.Name));
}
return null;
}
I think it is better not to try to avoid the exception. The reason is that if you have code like
if (DoesAssemblyExist(asmName)) {
object = Activator.CreateInstance(typeName);
}
else {
MessageBox.Show("Assembly does not exist");
}
there is always a risk in a pre-emptive multitasking OS that the assembly might be added/removed between the check and the actual creation. Yes, I realize this risk is minimal, but I still think the exception variant looks better because it is atomic.
Missing assembly definitely constitutes an exception, try/catch FileNotFoundException and handle the situation as per your logic.
I hope it will help for someone in the future:
On every external .dll you are using, create its own uniqe key, like so:
string key = "fjrj3288skckfktk4owoxkvkfk4o29dic";
And then, when you load your form, for every single external .dll that you have got, simply check if the key is exists like so:
If(isMyLib.Variables.key == key)
// continue
else
// .dll does not exists or broken.