SQLite + EntityFramework 6 setup

本文关键字:setup EntityFramework SQLite | 更新日期: 2023-09-27 18:10:22

我一直在尝试让EF 6和SQLite在WinForms应用程序中很好地发挥了一个多星期。我似乎遇到了多个随机异常-这让我相信我没有做正确的事情。我似乎找不到合适的安装指南或教程。

我正在使用SQLite 1.0.93和EF 6.1.0直接从Nuget。

这是我的Context类。我不相信DbSet类有问题。

public class MyDbContext: DbContext
{        
    public MyDbContext() : base("name=dbConnection")
    {
        System.Data.Entity.Database.SetInitializer<MyDbContext>(null);
    }
    public DbSet<Object1> Objects1 { get; set; }
    public DbSet<Object2> Objects2 { get; set; }
    public DbSet<Object3> Objects3 { get; set; }
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions
            .Remove<PluralizingTableNameConvention>();
    }
}

我也试图用Db数据填充两个单独的DataGridViews。

    public static BindingList<Objects1> Objects1BindingList
    {
        get
        {
            return MyDbContext.Objects1.Local.ToBindingList();
        }
    }
    public static BindingList<Objects3> Objects3BindingList
    {
        get { return MyDbContext.Objects3.Local.ToBindingList(); }
    }
    private static MyDbContext _data;
    public static MyDbContext  Data
    {
        get
        {
            return _data ?? (_data = new MyDbContext());
        }
    }
我App.config

  <connectionStrings>
    <add name="dbConnection"
      connectionString="Data Source=.'data.sqlite" providerName="System.Data.SQLite" />
  </connectionStrings>
  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite" />
      <add name="SQLite Data Provider" invariant="System.Data.SQLite" description="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>
  <entityFramework>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
      <provider invariantName="System.Data.SQLite" type="System.Data.SQLite.SQLiteProviderServices, System.Data.SQLite.Linq, Version=2.0.88.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" />
    </providers>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
    <parameter value="v11.0" />
      </parameters>
    </defaultConnectionFactory>
  </entityFramework>

谁能给我指一个最近的和经过验证的教程,或者给我指一个更好的方向?

谢谢。

SQLite + EntityFramework 6 setup

我一直在尝试使用sqlite与asp.net mvc5和EF 6.1,到目前为止没有,但我学到了一些东西,我可以建议你做看看你的app.config文件:

    <connectionStrings>
    <add name="dbConnection"
      connectionString="Data Source=.'data.sqlite" providerName="System.Data.SQLite" />
  </connectionStrings>
  <system.data>
    <DbProviderFactories>
      <remove invariant="System.Data.SQLite" />
      <add name="SQLite Data Provider" invariant="System.Data.SQLite" description="Data Provider for SQLite" type="System.Data.SQLite.SQLiteFactory, System.Data.SQLite" />
    <!--  Leave this in there if you want to have EF working with your project -->    
      <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>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
<providers>
  <provider invariantName="System.Data.SQLite" type="System.Data.SQLite.EF6.SQLiteProviderServices, System.Data.SQLite.EF6, Version=1.0.93.0, Culture=neutral, PublicKeyToken=db937bc2d44ff139" />
  <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>
    <!-- This only works for sql server localdb edition 
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
    <parameter value="v11.0" />
      </parameters>
    </defaultConnectionFactory> -->
  </entityFramework>

以上是我在我的网页。配置,让我与我的项目(自web。唯一的问题是,根据http://hintdesk.com/sqlite-with-entity-framework-code-first-and-migration/,你必须在Mozilla中使用SQLite管理器插件创建数据库。

即使当我这样做的时候,我仍然从这个"一个异常类型"系统中得到一些异常。InvalidOperationException"在EntityFramework.dll中发生,但未在用户代码中处理"到其他类型的异常。这真的很糟糕,但也许这能让你振作起来。