C# EF 6与System.Data.SQlite SaveChanges（）不工作？

因此，我刚刚开始在entity framework 6中使用System.Data.Sqlite（从Nuget下载了最新的System.Data.Sqlite，版本1.0.91.0） 经过一些配置和代码后，我发现我可以从数据库中读取数据，但不知何故，write无法工作

这是我的密码：

using (var context = new InternalDbContext())
        {
            var demo = context.DemoEntities.Where(d => d.ID == 1).FirstOrDefault();
            demo.Name = "TestTest";
            context.DemoEntities.Add(new Demo { Name = "Test" });
            context.SaveChanges();
        }

基本上，在SaveChanges之后，数据库中没有更新任何内容。但是，我可以使用通过SQlite管理工具手动填充的数据读取数据库

以下是我的数据库模式：

表名：Demo
字段：ID-整数主键自动递增
字段：名称-VARCHAR（256）

这是我的课程

---

public类InternalDbContext:DbContext
{
公共DbSet DemoEntities{get；set；}
public InternalDbContext（）
{
//关闭迁移（不是代码优先的数据库）
Database.SetInitializer（null）；
}
模型创建时受保护的覆盖无效（DbModelBuilder modelBuilder）
{
//数据库不使表名多元化
modelBuilder.Conventions.Remove（）；
}
}
[表（“演示”）]
公开课演示
{
公共长ID{get；set；}
公共字符串名称{get；set；}
}

App.config

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <sectionGroup name="common">
      <section name="logging" type="Common.Logging.ConfigurationSectionHandler, Common.Logging" />
    </sectionGroup>
    <!-- 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>
  <common>
    <logging>
      <factoryAdapter type="Common.Logging.Log4Net.Log4NetLoggerFactoryAdapter, Common.Logging.Log4net">
        <arg key="configType" value="FILE-WATCH" />
        <arg key="configFile" value="log4net.config" />
      </factoryAdapter>
    </logging>
  </common>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Common.Logging" publicKeyToken="af08829b84f0328e" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
    <assemblyIdentity name="log4net" publicKeyToken="669e0ddf0bb1aa2a" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-1.2.13.0" newVersion="1.2.13.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0" />
      </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>
  <connectionStrings>
    <add name="InternalDbContext" connectionString="Data Source=.\testdb.sqlite" providerName="System.Data.SQLite.EF6" />
  </connectionStrings>
  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite.EF6" />
      <add name="SQLite Data Provider" invariant="System.Data.SQLite.EF6" description="Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
    </DbProviderFactories>
  </system.data>
</configuration>

如果有人能给我指出正确的方向，那太好了，非常感谢

---

尼克

您的./bin/Debug/文件夹应该包含testdb.sqlite数据库的副本。这应该会有变化。

您可以检查任何SQLLite日志以查看a）请求是否命中数据库，b）是否生成了一些错误？我不知道SQLite的日志通常在哪里生成。你有什么建议吗？谢谢

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <sectionGroup name="common">
      <section name="logging" type="Common.Logging.ConfigurationSectionHandler, Common.Logging" />
    </sectionGroup>
    <!-- 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>
  <common>
    <logging>
      <factoryAdapter type="Common.Logging.Log4Net.Log4NetLoggerFactoryAdapter, Common.Logging.Log4net">
        <arg key="configType" value="FILE-WATCH" />
        <arg key="configFile" value="log4net.config" />
      </factoryAdapter>
    </logging>
  </common>
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="Common.Logging" publicKeyToken="af08829b84f0328e" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-2.0.0.0" newVersion="2.0.0.0" />
      </dependentAssembly>
      <dependentAssembly>
    <assemblyIdentity name="log4net" publicKeyToken="669e0ddf0bb1aa2a" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-1.2.13.0" newVersion="1.2.13.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0" />
      </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>
  <connectionStrings>
    <add name="InternalDbContext" connectionString="Data Source=.\testdb.sqlite" providerName="System.Data.SQLite.EF6" />
  </connectionStrings>
  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite.EF6" />
      <add name="SQLite Data Provider" invariant="System.Data.SQLite.EF6" description="Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
    </DbProviderFactories>
  </system.data>
</configuration>