C# SQLite+;EntityFramework 6设置
一周多以来,我一直在努力让EF6和SQLite在WinForms应用程序中发挥出色。我似乎遇到了多个随机异常——这让我相信我做的事情不对。我似乎找不到合适的安装指南或教程 我直接从Nuget使用SQLite 1.0.93和EF 6.1.0 这是我的上下文类。我认为DbSet类没有问题C# SQLite+;EntityFramework 6设置,c#,entity-framework,sqlite,datagridview,C#,Entity Framework,Sqlite,Datagridview,一周多以来,我一直在努力让EF6和SQLite在WinForms应用程序中发挥出色。我似乎遇到了多个随机异常——这让我相信我做的事情不对。我似乎找不到合适的安装指南或教程 我直接从Nuget使用SQLite 1.0.93和EF 6.1.0 这是我的上下文类。我认为DbSet类没有问题 public class MyDbContext: DbContext { public MyDbContext() : base("name=dbConnection") {
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>();
}
}
公共类MyDbContext:DbContext
{
public MyDbContext():base(“name=dbConnection”)
{
System.Data.Entity.Database.SetInitializer(null);
}
公共数据库集对象1{get;set;}
公共数据库集对象2{get;set;}
公共数据库集对象3{get;set;}
模型创建时受保护的覆盖无效(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions
.Remove();
}
}
通过这个,我还尝试用Db数据填充两个单独的DataGridView
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());
}
}
公共静态BindingList对象1BindingList
{
得到
{
返回MyDbContext.Objects1.Local.ToBindingList();
}
}
公共静态BindingList对象S3BindingList
{
获取{返回MyDbContext.Objects3.Local.ToBindingList();}
}
私有静态MyDbContext_数据;
公共静态MyDbContext数据
{
得到
{
返回_data???(_data=new MyDbContext());
}
}
我的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>
有人能给我指一个最近的、经过验证的教程,或者给我指一个更好的方向吗
谢谢。我一直在尝试将sqlite与asp.net mvc5和EF 6.1结合使用,到目前为止什么都没有,但我学到了一些东西,可以建议您查看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>
您必须先在Mozilla中使用SQLite管理器插件创建数据库
即使我这样做了,我仍然从EntityFramework.dll中发生了“System.InvalidOperationException”类型的异常,但没有在用户代码中处理“到其他类型的异常。这真的很糟糕,但也许这能让你走上正轨。也许我对类似问题的回答能提供一些帮助: