✌[问题] Task.Run操作数据库问题

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### Furion 版本号

哪个版本号？
1.17.3
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### Web 项目类型

- [x] WebApi
- [x] Mvc
- [ ] Razor Pages
- [ ] Blazor Server

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### 描述你的问题

发生了什么？

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### 异常堆栈信息

异常堆栈是什么？

```
Date：2021-04-08 17:49:06.689
LogLevel：Error
Message：An exception occurred w: Cannot access a disposed context instance. A common cause of this error is disposing a context instance that was resolved from dependency injection and then later trying to use the same context instance elsewhere in your application. This may occur if you are calling 'Dispose' on the context instance, or wrapping it in a using statement. If you are using dependency injection, you should let the dependency injection container take care of disposing context instances.hile iterating over the results of a query for context type '"Ocr.EntityFramework.Core.OcrDbContext"'."
""System.ObjectDisposedException
Object name: 'OcrDbContext'.
   at Microsoft.EntityFrameworkCore.DbContext.CheckDisposed()
   at Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
   at Microsoft.EntityFrameworkCore.DbContext.Microsoft.EntityFrameworkCore.Internal.IDbContextDependencies.get_StateManager()
   at Microsoft.EntityFrameworkCore.Query.QueryContext.InitializeStateManager(Boolean standAlone)
   at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.InitializeReaderAsync(DbContext _, Boolean result, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.MoveNextAsync()"{"EventId":{"Id":10100,"Name":"Microsoft.EntityFrameworkCore.Query.QueryIterationFailed"},"SourceContext":"Microsoft.EntityFrameworkCore.Query","ActionId":"ce48a151-1940-41e8-abda-900f560f7126","ActionName":"Web.Areas.WAdmin.Controllers.CardController.Info (Ocr.Web)","RequestId":"80000516-0004-eb00-b63f-84710c7967bb","RequestPath":"/Admin/Card/Info"}

System.ObjectDisposedException: Cannot access a disposed context instance. A common cause of this error is disposing a context instance that was resolved from dependency injection and then later trying to use the same context instance elsewhere in your application. This may occur if you are calling 'Dispose' on the context instance, or wrapping it in a using statement. If you are using dependency injection, you should let the dependency injection container take care of disposing context instances.
Object name: 'OcrDbContext'.
   at Microsoft.EntityFrameworkCore.DbContext.CheckDisposed()
   at Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
   at Microsoft.EntityFrameworkCore.DbContext.Microsoft.EntityFrameworkCore.Internal.IDbContextDependencies.get_StateManager()
   at Microsoft.EntityFrameworkCore.Query.QueryContext.InitializeStateManager(Boolean standAlone)
   at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.InitializeReaderAsync(DbContext _, Boolean result, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.ExecuteAsync[TState,TResult](TState state, Func`4 operation, Func`4 verifySucceeded, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.Internal.SingleQueryingEnumerable`1.AsyncEnumerator.MoveNextAsync()
--------------------------------------------------
```

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### 代码或代码仓库

什么代码导致？

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### 数据库信息

- [x] Sqlite
- [ ] SqlServer
- [ ] Mysql
- [ ] Oracle
- [ ] PGSql
- [ ] Firebird
- [ ] Cosmos

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### 期待结果

期待的结果是？

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GVP dotNET China/Furion

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GVPdotNET China/Furion

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