Unable to find the requested .Net Framework Data Provider - SQLite

问题

I thought that sqlite was simple but it is giving me a hard time. I just want to create an application where I can connect to a sqlite database using the ado.net entity data classes.

I am having this problem when testing the application on a virtual computer running windows xp. the application works fine on my current computer and also on my laptop when I deploy them.

Here is what happens on the virtual computer :

The application is able to launch.
The application is able to interact with the database using System.Data.SQLite
The application is not able to connect to the database using The ADO.NET Entity data models

when I try to connect I get the following exception:

I know there are a lot of post that talk about this and most of them say that you need to download the .NET provider for Sqlite.

I have already installed the sqlite-netFx40-setup-bundle-x86-2010-1.0.79.0.exe and I get the same problem. What should I do?

Edit

I managed to establish a connection by adding:

<system.data>
 <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" />
</DbProviderFactories>

to my app.config file.

The problem is that now I cannot select data nor insert records to the database. The exception that I get when I try to insert a new record now is:

A null was returned after calling the 'GetService' method on a store provider instance of type 'System.Data.SQLite.SQLiteFactory'. The store provider might not be functioning correctly.

回答1:

had to add:

 <system.data>
    <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" />
     </DbProviderFactories>
  </system.data>

to my app config file. and it now looks like:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>

  <startup useLegacyV2RuntimeActivationPolicy="true">
    <supportedRuntime version="v4.0.30319" sku=".NETFramework,Version=v4.0,Profile=Client" />
  </startup>
  <system.data>
     <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" />
      </DbProviderFactories>
    </system.data>
</configuration>

In the location where sqlite was installed I had to copy

to my output directory where my program exe is located

来源：https://stackoverflow.com/questions/9725979/unable-to-find-the-requested-net-framework-data-provider-sqlite

标签

sqlite

deployment

ado.net