I created a Windows form application (C#) with Mysql as back end
mysql connector net 6 0 2 is used in my form for connection
the exe works fine on my system but when i copied it to other computer and try to run it, it is giving me eror as
MySQL Connector/Net 6.0.2 file path not found
Thanx
You either need to deploy the MySQL Connector assemblies with your own application (or merge them into your own application assembly), or ensure the connector is installed on the machine you need to run the application on.
Try packing your application in a installer and add the connector as a resource when setting the project .Net makes this really easy but differs based on the IDE you are using.
Related
We have an issue related to connecting the Oracle database 19 c / 12c from one of the Windows 2016 machine build from AWS
The exception we are getting is "The provider is not compatible with the version of Oracle client"
Our application is using Oracle.DataAccess.dll to connect the oracle database. Along with the application build we have added these below binaries so that customers are not required to install the ODAC explicitly
oraociei12.dll
oci.dll
oraons.dll
OraOps12.dll
Our application is running in most of the Windows machine(s) and also with freshly build machine from AWS.
Expect for one of the particular Windows Machine they call as Production, there we are facing an issue. We tried all the possible solution provided in the Stackoverflow and others site, Tries are like
Installing the ODAC explicitly
Checking with GAC
Adding the environment variable
And other possible ways suggested over the net.
Can anybody help here what I am missing here?
I create a project to display a list of student on Database (the current.net framework version is 4.6.1). The wizard ask me to add database to the project and I accept it.
When I build the project on Debug mode, everything works fine on Windows 10.
I copy the debug folder to windows 7 and try to run the project, it shows me the error message.
System.Data.EntityException: The underlying provider failed on Open.
I try to install the .net framework 4.6.1 for windows 7 but it didn't work. This is the list of installed programs on windows 7:
The list of installed programs on windows 10:
I really don't know why my project didn't work on windows 7, are there some missing files or frameworks?
Thanks for your reading :D
"...LocalDB is a feature of SQL Server Express targeted to developers."
You can use LocalDB on your development machine, but don't expect it to be working on other machine. I can't tell you an exact solution as it depends on what you are allowed to do. Moving to a "real" database maybe.
I am developing a Windows application that connects to Oracle DB.
The machine I am developing the application on has Oracle 6i installed with SQLPlus and Toad to access Oracle by command or graphical interface.
The same set up is true across all other computers in my work place.
The only difference is that my pc has Visual Studio and Oracle 10g ODP.Net libraries to make the development of Oracle Application possible using Visual Studio.
I made sure to include Oracle.DataAccess.dll file along with the EXE in the same path to reduce dependency on default paths/ etc.
The finished EXE file runs as expected on my computer, but whenever I publish it to the other computers, I get the following error message:
The type intializer for 'Oracle.DataAccess.Client.OracleConnection' threw an exception.
I tried to change the version of Oracle.DataAccess.dll from 2.111.6.20 to 10.2.0.100.
Again, it ran perfectly on my PC but gave the following exception on other PCs:
Unable to load DLL 'OraOps10.dll': the specified module could not be found.
I copied the said file above from my pc and included it in the published folder of the EXE but the same error message appeared, as if it invisible to the .Net application.
All computers have Windows 7 and all of them are 32bit.
Is there a way to make the application connect to Oracle regardless of the libraries or Oracle version installed locally on the computer? (The same way Toad works whether it detects Oracle 6i or 10g installed)?
I can't install the Oracle 10g ODP.Net libraries on all computers.
I am new to Databases and .net!
I have SQL developer 3.0 installed through which I can connect to the Oracle 11g Database server.
The requirement is to write a C# program to connect to the oracle database and run query; in my visual studio 2013 project I have added a reference to Oracle.DataAccess.Client and written the code, however while debugging an error occurs that says "Ora-12541:TNS:No-Listener".
My question for now is, Do I need to install an Oracle client (64-bit ODAC 11.2 Release 6 (11.2.0.4.0) Xcopy for Windows x64 ?), my assumption was SQL developer will take care of this!
Please help!
SQL Developer has it's own Oracle drivers (JDBC as far as I know), thus you must install Oracle Client in order to connect to an Oracle DB in Visual Studio.
Note, "ODAC" contains only the ODP.NET Data Provider (i.e. mainly the Oracle.DataAccess.dll file). In order to use it, you must install the actual Oracle Client - at least the Instant Client (which is also included in the ODAC Download file).
Consider to use the ODP.NET Managed Driver, then you need only one single DLL, nothing else. It can be downloaded from Oracle page 64-bit Oracle Data Access Components (ODAC) Downloads and works for both 32bit and 64bit applications.
Unless you copied Oracle.DataAccess.dll from another machine, all oracle packages that include it, also include some version of the client. ODAC includes the full version while the xcopy installs have the instant client. I'll also point to the managed provider though for simplicity as it does not have any unmanaged dependencies,
However, if you got all the way to an "ora-xxxxx" error, it sounds like your Oracle client is correctly installed. The only issue you have now is your connection string. If you normally use a TNS name in Sql Developer, than you either need to copy your existing tnsnames.ora to network/admin in your new oracle home dir, or you need to set a TNS_ADMIN system environment variable to point to your existing one. There are other options too, but your error in this case is tns specific.
I am quite new to C# .net windows form application. I am building a Windows Form application and using MySql with it as a back end.
Now the problem is when I build the installed I want my installer to check if MySQL dot net connector is installed in the users PC and if not it should automatically install it.
As soon as this is done I will be creating a database using my application.
In .NET, unless you are trying to install the assemblies into the GAC, they get deployed with the application. Do not place anything into the GAC unless you have to as it opens up a whole host of challenges and makes managing the app more difficult.
I suggest including the MySQL connector assemblies with the application and include them in your MSI package. There are two parts to this - in the Deployment project, be sure the MySQL Libraries are referenced explicitly. Also, in your application project, set the Copy Local property of the reference to True. With these two steps, the MySQL Connector will be installed with the application. Don't worry too much about disk size - if memory serves, the MySQL Connectors are really small.
From MySQL manual:
You may also use the /quiet or /q command-line option with the msiexec
tool to install the Connector/Net package automatically (using the
default options) with no notification to the user. Using this method
the user cannot select options. Additionally, no prompts, messages or
dialog boxes will be displayed.
C:\> msiexec /package connector-net.msi /quiet
To provide a progress bar to the user during automatic installation, use the /passive option.