Cannot set MySqlCommand.CommandText when there is

问题:

System.InvalidOperationException
Cannot set MySqlCommand.CommandText when there is an open DataReader for this command; it must be closed first.

System.InvalidOperationException: Cannot set MySqlCommand.CommandText when there is an open DataReader for this command; it must be closed first.
at MySql.Data.MySqlClient.MySqlCommand.set_CommandText(String value) in C:\projects\mysqlconnector\src\MySqlConnector\MySql.Data.MySqlClient\MySqlCommand.cs:line 201
at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.CreateCommand(IRelationalConnection connection, IReadOnlyDictionary2 parameterValues) at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteAsync(IRelationalConnection connection, DbCommandMethod executeMethod, IReadOnlyDictionary2 parameterValues, CancellationToken cancellationToken)
at Microsoft.EntityFrameworkCore.Query.AsyncQueryMethodProvider.FastQueryAsyncEnumerable1.FastQueryAsyncEnumerator.MoveNext(CancellationToken cancellationToken) at System.Linq.AsyncEnumerable.Aggregate_[TSource,TAccumulate,TResult](IAsyncEnumerable1 source, TAccumulate seed, Func3 accumulator, Func2 resultSelector, CancellationToken cancellationToken) in D:\a\1\s\Ix.NET\Source\System.Interactive.Async\Aggregate.cs:line 120
at dotNET.Application.App.AreaListApp.TestAsync() in C:\Users\conanl\source\repos\conan.net\src\Application\Sys\AreaListApp.cs:line 20
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)

回答1:

ioc 注入问题

回答2:

多少贴点代码出来噻，比如从DataReader 取出数据的那段代码