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Deploy C# app with Entity framework+SQL Server Database

Sorry for that if it's repeating question but I could not find anything helpful.
I've developed a C# Winforms Application (Hostel Management System) using VS 2017 + MS SQL Server 2017
with EF 6.x. It is fully functional on my system (on which it's being developed). But now I wanna deploy it to my client. When I install it on any client machine and run, it works fine until any Database operation not happens. As soon as DB operation occurs, Application stops working and shows the error that it can't get connected to EF like this.
App.config is like shown below
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
</startup>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<connectionStrings>
<add name="DBEntities" connectionString="metadata=res://*/DBModels.csdl|res://*/DBModels.ssdl|res://*/DBModels.msl;provider=System.Data.SqlClient;provider connection string="data source=(localdb)\ProjectsV13;initial catalog=HMSDB;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
</configuration>
Anyone here who can help me out to deploy my app successfully

LocalDatabase- Setup installation problem

I have c# winfrm project with Local database. I created setup File with attaching database.
But I get following error.
A file activation error occurred. The physical file name 'InventoryDb.mdf' may be incorrect. Diagnose and correct additional errors, and retry the operation.
It's working fine in the same computer as I have my project, but not in othet Windows 7 whe nI install it.
This is my connection string in App.config page
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
</startup>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<connectionStrings>
<add name="Db" connectionString="Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\InventoryDb.mdf;Integrated Security=True;Connect Timeout=30; MultipleActiveResultSets=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>
I wonder what is I'am missing? Do I have wrong connectionstring? I would appricate for your help.

No connection string named 'KgSoftProContext' could be found in the application config file

I've added the DLL in my project database. main sentence even though the connection in the config file add it to the project I'm getting this error.
Database dll App.Config file
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
</configSections>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb"/>
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer"/>
</providers>
</entityFramework>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2"/>
</startup>
</configuration>
Main Project app.config file
<connectionStrings>
<add name="KgSoftProContext" connectionString="Data Source=KDRGNY\KDRGNY;Initial Catalog=KgSoftPro;Integrated Security=True;MultipleActiveResultSets=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
context file
static KgSoftProContext()
{
Database.SetInitializer<KgSoftProContext>(null);
}
public KgSoftProContext()
: base("name=KgSoftProContext")
{
}

it's been outta control I'm trying to do the problem completely. the problem is solved.

copy the connections string section to the .config file in your main project.

EF6 with localdb v13 underlying connection failed to open

I have a simple console app with EF6, my PC has localdb v13 and when I try to connect to the EF database, I get this error
{"Cannot open database \"NinjaDomain.DataModel.NinjaContext\" requested by the login. The login failed.\r\nLogin failed for user 'xx\\xx.yy'."}
this is the app.config
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
</startup>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>

It is does not matter Console app might also have an App.config, normally if you have installed EF from Package Manager Console like that:
install-package entityframework
The app.config will be automatically added to your project file.
This is the default connection string, if the do not have it the app.config (related to EF v 6.1.3)
"Data Source=(localdb)\\mssqllocaldb;Initial Catalog=MyConsoleApplication.Program+MyDbContext;Integrated Security=True;MultipleActiveResultSets=True"
Below, I have changed the app.config (If you do not have you can just add it to your project) and I have provided the connection string
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1" />
</startup>
<connectionStrings>
<add name="DatabaseConnectionString"
connectionString="Integrated Security=SSPI; Initial Catalog=UsersDatabase5; Data Source=.\;" providerName="System.Data.SqlClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
</configuration>
You should pass the connection string to the DbContext constructor with 'name' keyword like that:
using (var myDbContext = new MyDbContext("name=" + "DatabaseConnectionString"))
{
....
I have used the normal SQL Server in my app.config example:
Data Source=.\;
You can change it:
Data Source=(localdb)\\mssqllocaldb;
or just check your SQL Server instance name (use SSM or command line).

Error accessing the entity model in a seperate project

I have two projects one of which contains the entity model and acts as the DAL and the other one consumes that model and implements the application logic.
The model is a class library project and the application is a windows forms projects.
Having the following app.config files of the projects, and having referenced System.Data.Entity in the forms project, when I run the WinForms app, I get the following error:
Additional information: The Entity Framework provider type 'System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer' registered in the application config file for the ADO.NET provider with invariant name 'System.Data.SqlClient' could not be loaded. Make sure that the assembly-qualified name is used and that the assembly is available to the running application
Where you think the problem might be?
DAL Project's app.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<connectionStrings>
<add name="ProviderInterfaceContext" connectionString="metadata=res://*/ProviderInterfaceModel.csdl|res://*/ProviderInterfaceModel.ssdl|res://*/ProviderInterfaceModel.msl;provider=System.Data.SqlClient;provider connection string="data source=192.168.2.12;initial catalog=ProviderInterface;user id=--;password=---;multipleactiveresultsets=True;application name=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<system.serviceModel>
<client>
<endpoint address=""
binding="basicHttpBinding"
contract="PrizeServiceSoap" name="PrizeServiceSoap" />
</client>
</system.serviceModel>
</configuration>
The WinForms app.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<connectionStrings>
<add name="ProviderInterfaceContext" connectionString="metadata=res://*/ProviderInterfaceModel.csdl|res://*/ProviderInterfaceModel.ssdl|res://*/ProviderInterfaceModel.msl;provider=System.Data.SqlClient;provider connection string="data source=192.168.2.12;initial catalog=ProviderInterface;user id=---;password=----;multipleactiveresultsets=True;application name=EntityFramework"" providerName="System.Data.EntityClient" />
</connectionStrings>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
</startup>
</configuration>

Fixed.
Added reference to EntityFramework 6.0 and EntityFramework.SqlServer and everything is working now.