WPF 和 EF6 - 无法识别的配置部分 entityFramework
WPF and EF6 - Unrecognized configuration section entityFramework
环境: VS2019
, .NET 4.8
, EF 6
, SQLite
, WPF App (.NET Framework)
我正在按照这个 Microsoft official tutorial 创建一个代码优先的应用程序,使用 SQLite 称为 WPF_EF6
。使用如下所示的配置,我收到一个错误。
问题:我可能在这里遗漏了什么?我们如何解决这个问题?应用程序编译正常但抛出此运行时错误:
ConfigurationErrorsException: Unrecognized configuration section entityFramework. (C:\DotNet2019\WPF\WPF_EF6\bin\Debug\WPF_EF6.exe.Config line 22)
App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
</startup>
<system.data>
<DbProviderFactories>
<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" />
<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>
<connectionStrings>
<add name="SqlLiteContext"
connectionString="Data Source=|DataDirectory|MySQLiteDb.sqlite"
providerName="System.Data.SQLite" />
</connectionStrings>
<entityFramework>
<providers>
<provider invariantName="System.Data.SQLite.EF6"
type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
<provider invariantName="System.Data.SqlClient"
type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SQLite"
type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
</configuration>
MyDbContex.cs:
namespace WPF_EF6.Model
{
public class MyDbContex : DbContext
{
public MyDbContex() : base("MySQLiteDb")
{
}
public DbSet<MyObj> MyObjs { get; set; }
}
}
当您安装 System.Data.SQLite.EF6
Nuget 包时,App.config
中有一些现在遗漏的更改。准确地说,您缺少 <configSections>
元素。
你的 App.config
应该这样开始:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
</configSections>
<!-- ... -->
环境: VS2019
, .NET 4.8
, EF 6
, SQLite
, WPF App (.NET Framework)
我正在按照这个 Microsoft official tutorial 创建一个代码优先的应用程序,使用 SQLite 称为 WPF_EF6
。使用如下所示的配置,我收到一个错误。
问题:我可能在这里遗漏了什么?我们如何解决这个问题?应用程序编译正常但抛出此运行时错误:
ConfigurationErrorsException: Unrecognized configuration section entityFramework. (C:\DotNet2019\WPF\WPF_EF6\bin\Debug\WPF_EF6.exe.Config line 22)
App.config
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
</startup>
<system.data>
<DbProviderFactories>
<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" />
<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>
<connectionStrings>
<add name="SqlLiteContext"
connectionString="Data Source=|DataDirectory|MySQLiteDb.sqlite"
providerName="System.Data.SQLite" />
</connectionStrings>
<entityFramework>
<providers>
<provider invariantName="System.Data.SQLite.EF6"
type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
<provider invariantName="System.Data.SqlClient"
type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="System.Data.SQLite"
type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6" />
</providers>
</entityFramework>
</configuration>
MyDbContex.cs:
namespace WPF_EF6.Model
{
public class MyDbContex : DbContext
{
public MyDbContex() : base("MySQLiteDb")
{
}
public DbSet<MyObj> MyObjs { get; set; }
}
}
当您安装 System.Data.SQLite.EF6
Nuget 包时,App.config
中有一些现在遗漏的更改。准确地说,您缺少 <configSections>
元素。
你的 App.config
应该这样开始:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false"/>
</configSections>
<!-- ... -->