


How to Use MySql with Entity Framework 4 and Code-First Development: A Step-by-Step Guide?
Using MySql with Entity Framework 4 and the Code-First Development CTP
Scott Guthrie's recent post on code-first development with Entity Framework 4 sparked interest in experimenting with it using MySql instead of Sql Server. However, configure Entity Framework 4 to generate the database automatically with MySql.
Exception:
The initial attempt resulted in a ProviderIncompatibleException, indicating that the NerdDinners database did not exist. Creating the database manually also did not resolve the issue, leading to a second ProviderIncompatibleException stating that "DatabaseExists is not supported by the provider".
Resolution:
After further exploration, a few key points emerged:
- Database Creation: MySql requires the existence of the database before using Entity Framework 4. The initial expectation of automatic database creation did not align with MySql's behavior.
- DbContext Connection: Each DbContext instance requires a corresponding connection string in the web.config file. In the provided code snippet, the "NerdDinners" context must have a connection string named "NerdDinners".
- Table Naming: Entity Framework 4 uses the DBSet property name to determine the table name. Careful consideration should be taken when naming these properties to obtain the desired table names.
- Web.Config Modification: When deploying the MVC application with MySQL, a DataFactory needs to be included in the web.config file to address potential compatibility issues with MySql connectors. The following code should be added to the web.config:
<code class="xml"><system.data> <dbproviderfactories> <add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.3.6.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></add> </dbproviderfactories> </system.data></code>
- Dll Inclusion: Copying the MySQL DLLs into the deployment and setting their CopyLocal attribute to True ensures compatibility.
The above is the detailed content of How to Use MySql with Entity Framework 4 and Code-First Development: A Step-by-Step Guide?. For more information, please follow other related articles on the PHP Chinese website!

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