I am Developing a Desktop Application with c# .net and MySql as Database. It's an encryption application which produces an exe file which communicates with MySql to bring some data. I am using the MySql.Data.dll for application communication with MySql. When it produces exe there is no MySql.data.dll with it so it throws an error:
Could not load file or assembly 'MySql.Data, Version=6.2.2.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d' or one of its dependencies. The system cannot find the file specified.
Set the Copy Local Attribute of the assembly reference ( MySql.Data.dll ) to true. That makes the reference copy itself to the output directory.
You need to copy the MySql.Data.dll into the same directory where your application will execute. E.g. the runtime folder.
In other words: At some point you had to locate the MySql.Data.dll to use it in your project's client code. Simply find it again and copy it to the runtime folder: /bin/debug for example
You need to do as psasik stated. If you are to redistribute the application then you need to add the dll to the setup project and you can always use an MSBuild task to copy the dll during debugging (or just leave it in the bin\Debug directory)
Related
I have an c# application using 'Microsoft.SqlServer.Replication .NET Programming Interface DLL.
(Microsoft.SqlServer.Rmo.dll)
I need there the TransSubscription and TransPublication.
I can build the solution without any error or warning, and run it in Debug and Release mode on my computer. But if I would like to start the release application an another computer, i receive the error:
System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.SqlServer.Replication, Version=14.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The system cannot find the file specified.
File name: 'Microsoft.SqlServer.Replication, Version=14.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91'
I tried it to have as x64 and x86 application, no affect. I cannot interop the DLL, there will be errors in Vistual studio.
Anyone has an idea?
Thank you
Edit:
Meanwhile i did some more testing..
I have installed on a new VM SQL server to get only the available, and in the rght version dll. Installed VS and build the project. This was sucessful, no errors. But if i am starting the app, already in debug mode it crashed with the same error code. any idea?
The dll is referenced all build is completed.
Edit:
According: https://learn.microsoft.com/en-us/sql/relational-databases/replication/concepts/replication-management-objects-concepts?view=sql-server-ver15 i need to add Replication Agent Library (REPLAGNT.dll) but this i cannot do in VS, "A reference to .... could not be added. Please make sure that the file is accessible, and that it is a valid assembly or COM component". What do i do wrong?
For me it sounds like you referenced a dll which is located in a local folder, which works okay as long as you are working on your machine, but crashes as soon as you using another machine. After a build/rebuild a dll should be located in the bin folder.
My web project use .NET Framework 4.7.2 and use some references like
System.IO
System.Net
System.Net.Http
System.Net.Http.Formatting
My project works perfectly in local.
However, when I publish my web project on a target directory (for online), and look what it contains in /bin/ :
System.IO is missing
System.Net is present
System.Net.Http is missing
System.Net.Http.Formattingis present
Therefore, when I use my website, I get the obvious error Could not load file or assembly 'System.Net.Http, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
All references have Copy Local = True in Properties but some dll are always ignored. If i copy the dlls from local directory to target directory i get the error Server Error in '/' Application. Cannot load a reference assembly for execution. Exception Details: System.BadImageFormatException: Cannot load a reference assembly for execution. Exactly the same problem as this one.
However the delete/rebuild solution, or adding compilation options solution, doesn't work for me
What do I need to do to get these missing dlls to the destination folder?
Go to Solution Explorer on VS, open references tree, right click on the library(dll) and select properties on the menu. On properties box Copy Local should be True
I have created DLL using pgSQL(to read data and return to Automation Anywhere) and I am trying to use it in an Automation anywhere bot. But it shows an error:
Could not load file or assembly 'npgsql, Version=4.0.2.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7' or one of its dependencies. System cannot find the file specified.
if you have any idea to solve that please help me.
You can try placing all(copy paste) the necessary assemblies ( DLLs) that are required for pgSQL in your DLL function to be invoked into AAE Program files directory. Since Player couldn't load the dependencies of your dll It is throwing this exception.
Another place where you can copy is while running bot see where your dll is located and put all necessary dependent assemblies there When you run your metabot AAE creates temporary folder where it copy your dll. copy dependencies there
You need to add the dependencies you used whilst creating the DLL into the metabot as well, by uploading them alongside your DLL in the assets view. In this case 'npgsql.dll'.
If you've built the DLL on another machine, you can - in addition to the steps above - also try adding the dependent DLLs to the PATH.
I am getting a fileNotFoundException when I try to connect to my postgres database.
Her is a sample of the code.
connectionString = "Server=127.0.0.1;Port=5432;Database=MMEData;User Id=postgres;Password=nH9Ummg5;";
dbConn = new NpgsqlConnection(connectionString); //This constructor is when I get the exception
Here is the exception I am getting:
{"File or assembly name Mono.Security, or one of its dependencies, was not
found. Mono.Security, Version=4.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756"}
I copied the npsql.dll file to the application's directory and afterwards made a reference to it.
I also copied the rest of the files from a zip called 'Npgsql-2.2.0-net45.zip'.
I have the using npgsql; statement.
I am running pgAdmin III at the same time and in it I connected the server. The Database name is MMEData.
I am running application and postgres on the same (local) machine and on the default port (5432).
Anyone any idea what I am missing?
Please add reference name called Mono.Security dll in your project solution it could be avoid this type of errors
you need to copy the library Mono.Security.dll to the application's directory and afterwards made a reference to it.
I have had the same problem and my solution was to add Mono.security.dll as a reference to my project, after that the connection to PostgreSQL database was fine.
I downloaded the nuget package.
I renamed it as a zip file.
I extracted Mono.security.dll to my project.
I added it as a reference with always copy to directory.
I compiled my project and runned it and it was ok.
I built a web application that uses the J# libraries which works fine in my cpu, however, when I deploy it to my shared server. I get an error message: Parser Error Message: Could not load file or assembly 'vjslib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
So basically, the server doesn't have visual j# installed. The problem is they wont install it because it is a shared server.
Is there a way I can deploy the J# assemblies with my project so that it will work on the shared server without it being registered in the GAC?
Thanks for your help!!
Simplest solution: Try to copy the assemblies your application needs into the same folder where your application resides.
The following MSDN article explains How the Runtime Locates Assemblies.
Also, you may find more options (including copying all J# related dlls into a subfolder of the application folder if needed) in the following link when the runtime cannot find the assembly in the GAC: Locating the Assembly through Codebases or Probing
Without knowing anything about J# I can only suggest that you try just distributing the required libraries along with your program (place them in the same directory), I believe if it can't find the library in the GAC it will revert to look in the current directory.