I'm trying to generate models from an existing database using the Reverse POCO generator. I've not made any changes to the default template file and I've called my connection string "MyDbContext".
<connectionStrings>
<add name="MyDbContext" providerName="System.Data.SqlClient" connectionString="Data Source=xx.xxx.xx.xxx\SQLEXPRESS;Initial Catalog=ZooQ;Persist Security Info=True;User ID=ZooQDev;Password=******;"/>
</connectionStrings>
I've checked the credentials are ok by testing the connection in visual studio, so I know they are right. Only difference to the usual way I do this is that now I'm accessing a VM server on Azure, but I wouldn't think that would be the problem.
I've tried uninstalling and reinstalling the generator, uninstalling and reinstalling Entity Framework, deleting and re-adding the template file and closing and re-opening Visual Studio.
I've spent a day trying to migrate an Entity Framework 6 SQL Server CE to PostgreSQL.
I've copied the database over fine, but I can't seem to get the data provider to work.
Firstly I tried the older 2.2.7 version of the EF provider, which doesn't require .NET 4.5 (because our project can't use it), but that didn't work. I've been using NpgsqlConnection instead of SqlConnectionStringBuilder and changed the app.config to have a connection string with Host (I tried Server but it didn't like it) and Database values, and made sure the EF section is as follows:
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="Npgsql" type="Npgsql.NpgsqlServices, EntityFramework6.Npgsql" />
</providers>
</entityFramework>
I've now ignored this limitation just to try and get it working, so I have the EF6 v3.1.1 version of the EF provider and the latest .NET provider (v3.2.2) and that's not working either.
In an attempt to fix it, I've also been trying to re-sync the EDMX from the SQL Server CE to the PostgreSQL replacement by installing the VS2015 extension, but it just gave a message saying an error occurred, so I tried this: https://github.com/npgsql/npgsql/issues/1514
which got further, opening the window, but then crashed as soon as I typed into the boxes. Since upgrading the project to .NET 4.5, this provider no longer appears at all...
I've tried reinstalling everything several times and restarting VS a lot, and Since upgrading I've also tried installing the GAC files, as it wasn't clear if the VS extension needed them (also v3.2.2).
Is anyone able to shed some light on how easiest to get all this working, preferably without the requirement of .NET 4.5?
Thanks
I got it working with installing the Visual Studio Extension Npgsql PostgreSQL Integration.
Follow the instruction on this page: https://www.npgsql.org/efcore/
This thread led me to the right path: Add custom data source to visual studio 2015
Installing the npgsql extension as described in tsChan's answer wasn't enough for me, I also had to modify my app.config (I suspect because it was created before I installed the extension) to include the npgsql data provider in the EntityFramework section as follows:
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="Npgsql" type="Npgsql.NpgsqlServices, EntityFramework6.Npgsql" />
</providers>
</entityFramework>
After I did that, the provider appeared in the wizard options.
PostgreSQL data provider missing from wizard in Visual Studio 2019 //It works
Install this extension "Npgsql PostgreSQL Integration" https://marketplace.visualstudio.com/items?itemName=RojanskyS.NpgsqlPostgreSQLIntegration
install "EntityFramework6.Npgsql" package from Nu get Package manager
After installation without restarting or editing app.config file you will see changes on your project references folder and app.config file
Now click on add->new item->ADO.NET Entity data model->EF designer from database->new connection->change you will see postgress in data source
I have a project that I just updated using nuget. This updated entity framework from 6.1 to 6.1.1, and it updated sqlite to 1.0.93. I wanted to update my model from my latest database. I did the steps of
1) Model from Database
2) Select sqlite database
3) Generate
After the generation I received the following error message shown below. I have the 1.0.93 design time components install. Does anyone know what exactly is causing this error. The project references and versions all match the versions shown above.
Error Message:
Your project references the latest Entity Framework; however and Entity Framework database provider
compatible with this version could not be found for you data connection.
Update:
I ended up installing 6.1.0 manually using the package manager console
Install-Package EntityFramework -Version 6.1.0
Then in my csporj files replacing
packages\EntityFramework.6.1.1
with
packages\EntityFramework.6.1.0
I tried creating EF Designer from Database and Code First from Database but I am still getting the same error.
UPDATE
I have followed the instructions Tom has provided, and thanks time for taking the time to respond in depth it is appreciated. But I cannot get the entity framework designer to work with SQLite 1.0.93. What I have found:
1) When I add the SQLite data source from the tools menu as Tom describes I see the SQLite data provider.
2) But when I restart visual studio the data source is not connected
3) The data source can be refreshed and it is valid after restart
4) Add new data item but SQLite is not listed as a provider
I have double checked the registry and EF6 is appended to the invariant name, the SQLite dlls are registered in the GAC. I will try to see what else I can find but at this point I am not sure what to look for. As a side note I have tried dotConnect and it does not work either with EF 6.1.1.
Update 2
Does anyone know if the Entity Framework Designer has a logging option to find out what might be happening?
[ UPDATE : for an easier solution that works with Visual Studio 2013 Update 4 (Pro and Ultimate) and recent versions of Sqlite Providers and EF, look at the solution 'broslav' posted below. Don't know if it works with Express editions... ]
Ok, this is a suggestion. This does NOT work for Visual Studio Express editions.
Also, I'm not sure how to get it to work for an update of an existing project.
And it is an absolute pain in the butt.
I haven't tested if everything is required, but this should work:
First, do NOT use the NuGet package for SQLite, but download the assembly installer from here:
http://system.data.sqlite.org/index.html/doc/trunk/www/downloads.wiki
Install the Setups for 32-bit Windows (.NET Framework 4.5.1) installer: sqlite-netFx451-setup-bundle-x86-2013-1.0.93.0.exe (10.00 MiB) (NOT the 64-bit version). This is the only one with the designer.
Install and select to install in the GAC and install the Designer for VS13.
For the following, the exact order is important!
I made a video of these steps, see: http://vimeo.com/103372740
Create a project in VS13. Target the build to framework 4.5.1 and x86 explicitly. Save and build.
Next, install the latest EF 6 package (6.1.1) from NuGet. Save and build.
Manually add references to the installed SQLite assemblies (including the Designer) , under the Reference Manager under Assemblies you can find the Extensions option for selecting the four added assemblies in the GAC : System.Data.SQLite Core + Designer + for Entity Framework + for LINQ.. Save and build.
Then create a connection to your database via Connect to Database under Tools. Before you do anything else Save and Build and then RESTART Visual Studio. DO NOT DO ANYTHING ELSE before starting the ADO.NET Entity Data Model wizard, so DO NOT refresh the database connection.
Add an ADO.NET Entity Data Model, select Generate from Database.
Your database connection will show up in the drop-down list. Keep it there, but select to create a New Connection anyway and select the exact same database again (as if you are creating a new connection). It sounds silly, but it is crucial, see image below...
When I actually Added an ADO.NET Entity Data Model this way it did present the annoying error, but the Next button is selectable and everything worked regardless (amazingly)!
Designer works, retrieving data and writing data works.
Haven't tested deployment on another machine though... I'm using Win7 64-bit.
CHANGED UPDATE: To get the correct configuration to actually access the database, you have to install the System.Data.SQLite.EF6 package from NuGet after doing all of the above, then add
<provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
to the App.Config and remove the other providers and remove everything in between <system.data></system.data>, otherwise you'll get some exception. But note that this means that every time you want to update the EDMX model, you have to change the App.Config invariantName="System.Data.SQLite" to invariantName="System.Data.SQLite.EF6" and vice versa.
** Is this getting ridiculous? Yes, it is! And it gave me quite a headache... **
This is what worked for me:
had Windows 8.1 Pro x64
had VisualStudio 2013 Ultimate Update 4
installed http://system.data.sqlite.org/downloads/1.0.94.0/sqlite-netFx451-setup-bundle-x86-2013-1.0.94.0.exe (in GAC, plus designer)
installed EFTools6.1.2ForVS2013.msi from https://www.microsoft.com/en-us/download/details.aspx?id=40762
in old or new solution/project that targets .NET 4.5.1 and Any CPU installed via NuGet package System.Data.SQLite
added new model from database (I did not see the SQLite provider here until I installed the NuGet package inside the project)
to actually access the data, I had to rearrange the add and remove items inside the DbProviderFactories tag in the app.config
So the packages I had were:
<packages>
<package id="EntityFramework" version="6.1.1" targetFramework="net451" />
<package id="System.Data.SQLite" version="1.0.94.1" targetFramework="net451" />
<package id="System.Data.SQLite.Core" version="1.0.94.0" targetFramework="net451" />
<package id="System.Data.SQLite.EF6" version="1.0.94.0" targetFramework="net451" />
<package id="System.Data.SQLite.Linq" version="1.0.94.1" targetFramework="net451" />
</packages>
and the app.config that worked for me had contents:
<?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>
<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" />
<provider invariantName="System.Data.SQLite.EF6" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
<system.diagnostics>
<sources>
<!-- This section defines the logging configuration for My.Application.Log -->
<source name="DefaultSource" switchName="DefaultSwitch">
<listeners>
<add name="FileLog" />
<!-- Uncomment the below section to write to the Application Event Log -->
<!--<add name="EventLog"/>-->
</listeners>
</source>
</sources>
<switches>
<add name="DefaultSwitch" value="Information" />
</switches>
<sharedListeners>
<add name="FileLog" type="Microsoft.VisualBasic.Logging.FileLogTraceListener, Microsoft.VisualBasic, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL" initializeData="FileLogWriter" />
<!-- Uncomment the below section and replace APPLICATION_NAME with the name of your application to write to the Application Event Log -->
<!--<add name="EventLog" type="System.Diagnostics.EventLogTraceListener" initializeData="APPLICATION_NAME"/> -->
</sharedListeners>
</system.diagnostics>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.1" />
</startup>
<system.data>
<!--
NOTE: The extra "remove" element below is to prevent the design-time
support components within EF6 from selecting the legacy ADO.NET
provider for SQLite (i.e. the one without any EF6 support). It
appears to only consider the first ADO.NET provider in the list
within the resulting "app.config" or "web.config" file.
-->
<DbProviderFactories>
<remove invariant="System.Data.SQLite" />
<add name="SQLite Data Provider" invariant="System.Data.SQLite" description=".NET Framework Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
<remove invariant="System.Data.SQLite.EF6" />
<add name="SQLite Data Provider (Entity Framework 6)" invariant="System.Data.SQLite.EF6" description=".NET Framework Data Provider for SQLite (Entity Framework 6)" type="System.Data.SQLite.EF6.SQLiteProviderFactory, System.Data.SQLite.EF6" />
</DbProviderFactories>
</system.data>
<connectionStrings>
<add name="WorkinDataEntities" connectionString="metadata=res://*/WorkinDataModel.csdl|res://*/WorkinDataModel.ssdl|res://*/WorkinDataModel.msl;provider=System.Data.SQLite.EF6;provider connection string="data source=X:\dev\proj\workin\bin\data.db"" providerName="System.Data.EntityClient" />
</connectionStrings>
</configuration>
As you can see, somehow in the end, for me, it was not necessary to remove "EF6" from invariantName or to remove or rearrange other providers or default connection factories. I didn't have to do any reg hacks. Rearranging add/remove tags (that were added during NuGet System.Data.SQLite 1.0.94.1 package installation) in the start-up project's app.config made the difference.
After all the above, I updated EntityFramework to 6.1.2 via NuGet and both updating the model from database via designer and accessing the data at runtime still works.
I finally have steps to consistently add Sqlite and EF6 to a project:
EF6: versions 6.0.0 to be 6.1.3 (currently the latest version).
System.Data.Sqlite: 1.0.93 - 1.0.95 but not 1.0.98 (currently the latest version).
To avoid getting System.Data.Sqlite 1.0.98 , do not install using Nuget Package manager. Manually install System.Data.Sqlite. Unfortunately, http://system.data.sqlite.org/ does not readily list previous downloads.
x86 System.Data.Sqlite 1.093
x64 System.Data.Sqlite 1.093
I use Nuget Package manager and install EF6 and then I manually added System.Data.Sqlite library. I have tried multiple times to use 1.0.98 but I cannot
App.config File
For my implementation, I am working with database first an manually coding the entity data classes
public partial class MyDbContextEF : DbContext
{
public MyDbContext() : base("name=MyDbContext") { }
public DbSet<DataRecord> DataRecords { get; set; }
}
[Table("TableName")]
public class DataRecord
{
[Key]
public Int64 RowID { get; set; }
public string Name { get; set; }
}
I reported this issue and a fix is under way, and a workaround appears to be available (I have not tested it) http://system.data.sqlite.org/index.html/tktview?name=e634e330a6
I had the exact same problem--The model designer wizard was not showing my sqlite db in the dropdown list. I was able to resolve it by fiddling with the sqlite db connection and tables.
0a) I added a connection through the Server Explorer to my sqlite file (the sqlite providers and servers showed in new connection wizard for the Server Explorer but not my edmx Model Wizard)
0b) At this point it was not showing in the edmx Model Wizard still, but did show as a Data Connection in the Server Explorer.
1) I added a table to the sqlite file.
2) I closed the connection to the sqlite db through the Server Explorer
3) I opened the design of my dummy table om the sqlite file through the Server Explorer (thus reinitiating the connection)
4) I tried to "Update Model from Database..." and it was showing in the dropdown list
Another step I did not include above was I created and deleted an .mdf SQL server database New Item... > Database Service.... I did that shortly before trying the above steps. I assume that wouldn't matter but you never know.
Not sure what exactly did it. It seemed a manual disconnect and reconnect through the server explorer made VS "wake up" and display the server in the list. Try fiddling with the connection and tables a bit to see if that wakes something up.
I had this problem as well. The cause was probably that I forgot to tick the visual studio checkbox when installing the system.data.sqlite driver and then installed over that with the checkbox ticked without deinstalling the system.data.sqlite driver first. This how I solved it:
Uninstall the system.data.sqlite driver.
Reboot.
Install the system.data.sqlite driver
Delete the old solution and set it up anew, just like you did (might not be necessary).
Add the ADO.NET entity model (the template was missing for me, this answer helped with that)
The sqlite data source should now be available.
Using VS2012 and beginning with a SL Business Application project, I added
an EF model Model1, removed the tt files, changed code gen to Default and built the project. Then I added DomainService1 with various tables. OData was not selected.
Starting the app it appears there is a service available:
But if we click the url, we expect to see XML, and it doesn't work. Appending ?wsdl should cause XML to be sent to the browser, but I just get the illustrated page. Trying it with svcutil as suggested by this page produces this:
Microsoft (R) Service Model Metadata Tool [Microsoft (R) Windows (R) Communication
Foundation, Version 4.0.30319.17929] Copyright (c) Microsoft Corporation.
All rights reserved.
Attempting to download metadata from 'http://localhost:57880/Ria1-Web-DomainService1.sv
c?wsdl' using WS-Metadata Exchange or DISCO. Generating files...
Warning: No code was generated. If you were trying to generate a client, this could be
because the metadata documents did not contain any valid contracts or services or
because all contracts/services were discovered to exist in /reference assemblies.
Verify that you passed all the metadata documents to the tool.
Warning: If you would like to generate data contracts from schemas make sure to use
the /dataContractOnly option.
This appears to suggest the MEX endpoint isn't properly designed, so out came my WCF books, but there is no correlation between what they think ought to be in <system.serviceModel> and what actually was there:
<system.serviceModel>
<serviceHostingEnvironment
aspNetCompatibilityEnabled="true"
multipleSiteBindingsEnabled="true" />
</system.serviceModel>
What do I need to add to the config to expose the metadata?
While preparing this question it occurred to me to wonder what happens to the config when you do specify OData. This turned out to be the right question. You get this:
<system.serviceModel>
<serviceHostingEnvironment
aspNetCompatibilityEnabled="true"
multipleSiteBindingsEnabled="true" />
<domainServices>
<endpoints>
<add name="OData"
type="System.ServiceModel.DomainServices.Hosting.ODataEndpointFactory,
System.ServiceModel.DomainServices.Hosting.OData,
Version=4.0.0.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35" />
</endpoints>
</domainServices>
</system.serviceModel>
This gave me a few more search terms. Combining information from various sources led to this:
<add name="Soap"
type="Microsoft.ServiceModel.DomainServices.Hosting.SoapXmlEndpointFactory,
Microsoft.ServiceModel.DomainServices.Hosting,
Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" />
which totally failed to work until I added a reference to this:
Whereupon everything lit up and there was much rejoicing.
I have a SQL Server CE 3.5 DB which is set to "Embedded" vis a vis Properties. The database has an associated .edmx file and entity-framework code works when I run it from VS 2010.
The app.config string is the following:
<add name="MapProjectDB2Entities1" connectionString="metadata=res://*/MapProjectDB.csdl|res://*/MapProjectDB.ssdl|res://*/MapProjectDB.msl;provider=System.Data.SqlServerCe.3.5;provider connection string="Data Source=MapProjectDB2.sdf"" providerName="System.Data.EntityClient" />
But when I Publish my project and run it from the one-click deploy folder, the exception is "The Underlying Data Provider Failed to Open".
So I need to somehow connect to my embedded database. Thanks in advance the google hits are a bit spotty for this one.
I should mention that the DB is member of a library (DLL) project, which is loaded from another project.
I needed to add the DB to my Exe project. From there I needed to change the config string to be the following:
The difference is only the |DataDirectory|\ part
<add name="MapProjectDB2Entities1" connectionString="metadata=res://*/MapProjectDB.csdl|res://*/MapProjectDB.ssdl|res://*/MapProjectDB.msl;provider=System.Data.SqlServerCe.3.5;provider connection string="Data Source=|DataDirectory|\MapProjectDB2.sdf"" providerName="System.Data.EntityClient" />