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public ref class DbDataReader abstract : IDisposable, System::Collections::IEnumerable
public ref class DbDataReader abstract : MarshalByRefObject, IAsyncDisposable, IDisposable, System::Collections::IEnumerable, System::Data::IDataReader
public ref class DbDataReader abstract : IDisposable, System::Collections::IEnumerable, System::Data::IDataReader
public ref class DbDataReader abstract : MarshalByRefObject, IDisposable, System::Collections::IEnumerable, System::Data::IDataReader
public ref class DbDataReader abstract : MarshalByRefObject, System::Collections::IEnumerable, System::Data::IDataReader
public ref class DbDataReader abstract : MarshalByRefObject, IAsyncDisposable, System::Collections::IEnumerable, System::Data::IDataReader
public abstract class DbDataReader : IDisposable, System.Collections.IEnumerable
public abstract class DbDataReader : MarshalByRefObject, IAsyncDisposable, IDisposable, System.Collections.IEnumerable, System.Data.IDataReader
public abstract class DbDataReader : IDisposable, System.Collections.IEnumerable, System.Data.IDataReader
public abstract class DbDataReader : MarshalByRefObject, IDisposable, System.Collections.IEnumerable, System.Data.IDataReader
public abstract class DbDataReader : MarshalByRefObject, System.Collections.IEnumerable, System.Data.IDataReader
public abstract class DbDataReader : MarshalByRefObject, IAsyncDisposable, System.Collections.IEnumerable, System.Data.IDataReader
type DbDataReader = class
    interface IEnumerable
    interface IDisposable
type DbDataReader = class
    inherit MarshalByRefObject
    interface IEnumerable
    interface IDataReader
    interface IDataRecord
    interface IDisposable
    interface IAsyncDisposable
type DbDataReader = class
    interface IEnumerable
    interface IDataReader
    interface IDataRecord
    interface IDisposable
type DbDataReader = class
    inherit MarshalByRefObject
    interface IEnumerable
    interface IDataReader
    interface IDataRecord
    interface IDisposable
type DbDataReader = class
    inherit MarshalByRefObject
    interface IDataReader
    interface IDisposable
    interface IDataRecord
    interface IEnumerable
Public MustInherit Class DbDataReader
Implements IDisposable, IEnumerable
Public MustInherit Class DbDataReader
Inherits MarshalByRefObject
Implements IAsyncDisposable, IDataReader, IDisposable, IEnumerable
Public MustInherit Class DbDataReader
Implements IDataReader, IDisposable, IEnumerable
Public MustInherit Class DbDataReader
Inherits MarshalByRefObject
Implements IDataReader, IDisposable, IEnumerable
Public MustInherit Class DbDataReader
Inherits MarshalByRefObject
Implements IDataReader, IEnumerable
Public MustInherit Class DbDataReader
Inherits MarshalByRefObject
Implements IAsyncDisposable, IDataReader, IEnumerable
DbDataReader 提供程序应使用合适的实现进行重写。 可以选择接受 cancellationToken 。 默认实现调用同步 GetColumnSchema(DbDataReader) 调用并返回已完成任务。 如果传递到已取消 cancellationToken ,则默认实现将返回已取消的任务。 GetColumnSchema(DbDataReader) 引发的异常将通过任务异常属性传递。

可以选择接受 cancellationToken 。 默认实现调用同步 GetSchemaTable() 调用并返回已完成任务。 如果传递到已取消 cancellationToken ,则默认实现将返回已取消的任务。 GetSchemaTable() 引发的异常将通过任务异常属性传递。

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