Câu trả lời này hoạt động với Entity Framework 6
Câu trả lời được chấp nhận không hoạt động cho đối tượng Dự kiến hoặc Ẩn danh. Hiệu suất cũng có thể là một vấn đề.
Để đạt được điều này, chúng ta cần sử dụng a DbCommandInterceptor, một đối tượng do EntityFramework cung cấp.
Tạo Interceptor:
public class UtcInterceptor : DbCommandInterceptor
{
public override void ReaderExecuted(DbCommand command, DbCommandInterceptionContext<DbDataReader> interceptionContext)
{
base.ReaderExecuted(command, interceptionContext);
if (interceptionContext?.Result != null && !(interceptionContext.Result is UtcDbDataReader))
{
interceptionContext.Result = new UtcDbDataReader(interceptionContext.Result);
}
}
}
interceptionContext.Result là DbDataReader, được chúng tôi thay thế bằng
public class UtcDbDataReader : DbDataReader
{
private readonly DbDataReader source;
public UtcDbDataReader(DbDataReader source)
{
this.source = source;
}
public override DateTime GetDateTime(int ordinal)
{
return DateTime.SpecifyKind(source.GetDateTime(ordinal), DateTimeKind.Utc);
}
// you need to fill all overrides. Just call the same method on source in all cases
public new void Dispose()
{
source.Dispose();
}
public new IDataReader GetData(int ordinal)
{
return source.GetData(ordinal);
}
}
Đăng ký thiết bị đánh chặn trong DbConfiguration
internal class MyDbConfiguration : DbConfiguration
{
protected internal MyDbConfiguration ()
{
AddInterceptor(new UtcInterceptor());
}
}
Cuối cùng, đăng ký cấu hình cho DbContext
[DbConfigurationType(typeof(MyDbConfiguration ))]
internal class MyDbContext : DbContext
{
// ...
}
Đó là nó. Chúc mừng.
Để đơn giản, đây là toàn bộ việc triển khai DbReader:
using System;
using System.Collections;
using System.Data;
using System.Data.Common;
using System.IO;
using System.Threading;
using System.Threading.Tasks;
namespace MyNameSpace
{
/// <inheritdoc />
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1010:CollectionsShouldImplementGenericInterface")]
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Naming", "CA1710:IdentifiersShouldHaveCorrectSuffix")]
public class UtcDbDataReader : DbDataReader
{
private readonly DbDataReader source;
public UtcDbDataReader(DbDataReader source)
{
this.source = source;
}
/// <inheritdoc />
public override int VisibleFieldCount => source.VisibleFieldCount;
/// <inheritdoc />
public override int Depth => source.Depth;
/// <inheritdoc />
public override int FieldCount => source.FieldCount;
/// <inheritdoc />
public override bool HasRows => source.HasRows;
/// <inheritdoc />
public override bool IsClosed => source.IsClosed;
/// <inheritdoc />
public override int RecordsAffected => source.RecordsAffected;
/// <inheritdoc />
public override object this[string name] => source[name];
/// <inheritdoc />
public override object this[int ordinal] => source[ordinal];
/// <inheritdoc />
public override bool GetBoolean(int ordinal)
{
return source.GetBoolean(ordinal);
}
/// <inheritdoc />
public override byte GetByte(int ordinal)
{
return source.GetByte(ordinal);
}
/// <inheritdoc />
public override long GetBytes(int ordinal, long dataOffset, byte[] buffer, int bufferOffset, int length)
{
return source.GetBytes(ordinal, dataOffset, buffer, bufferOffset, length);
}
/// <inheritdoc />
public override char GetChar(int ordinal)
{
return source.GetChar(ordinal);
}
/// <inheritdoc />
public override long GetChars(int ordinal, long dataOffset, char[] buffer, int bufferOffset, int length)
{
return source.GetChars(ordinal, dataOffset, buffer, bufferOffset, length);
}
/// <inheritdoc />
public override string GetDataTypeName(int ordinal)
{
return source.GetDataTypeName(ordinal);
}
/// <summary>
/// Returns datetime with Utc kind
/// </summary>
public override DateTime GetDateTime(int ordinal)
{
return DateTime.SpecifyKind(source.GetDateTime(ordinal), DateTimeKind.Utc);
}
/// <inheritdoc />
public override decimal GetDecimal(int ordinal)
{
return source.GetDecimal(ordinal);
}
/// <inheritdoc />
public override double GetDouble(int ordinal)
{
return source.GetDouble(ordinal);
}
/// <inheritdoc />
public override IEnumerator GetEnumerator()
{
return source.GetEnumerator();
}
/// <inheritdoc />
public override Type GetFieldType(int ordinal)
{
return source.GetFieldType(ordinal);
}
/// <inheritdoc />
public override float GetFloat(int ordinal)
{
return source.GetFloat(ordinal);
}
/// <inheritdoc />
public override Guid GetGuid(int ordinal)
{
return source.GetGuid(ordinal);
}
/// <inheritdoc />
public override short GetInt16(int ordinal)
{
return source.GetInt16(ordinal);
}
/// <inheritdoc />
public override int GetInt32(int ordinal)
{
return source.GetInt32(ordinal);
}
/// <inheritdoc />
public override long GetInt64(int ordinal)
{
return source.GetInt64(ordinal);
}
/// <inheritdoc />
public override string GetName(int ordinal)
{
return source.GetName(ordinal);
}
/// <inheritdoc />
public override int GetOrdinal(string name)
{
return source.GetOrdinal(name);
}
/// <inheritdoc />
public override string GetString(int ordinal)
{
return source.GetString(ordinal);
}
/// <inheritdoc />
public override object GetValue(int ordinal)
{
return source.GetValue(ordinal);
}
/// <inheritdoc />
public override int GetValues(object[] values)
{
return source.GetValues(values);
}
/// <inheritdoc />
public override bool IsDBNull(int ordinal)
{
return source.IsDBNull(ordinal);
}
/// <inheritdoc />
public override bool NextResult()
{
return source.NextResult();
}
/// <inheritdoc />
public override bool Read()
{
return source.Read();
}
/// <inheritdoc />
public override void Close()
{
source.Close();
}
/// <inheritdoc />
public override T GetFieldValue<T>(int ordinal)
{
return source.GetFieldValue<T>(ordinal);
}
/// <inheritdoc />
public override Task<T> GetFieldValueAsync<T>(int ordinal, CancellationToken cancellationToken)
{
return source.GetFieldValueAsync<T>(ordinal, cancellationToken);
}
/// <inheritdoc />
public override Type GetProviderSpecificFieldType(int ordinal)
{
return source.GetProviderSpecificFieldType(ordinal);
}
/// <inheritdoc />
public override object GetProviderSpecificValue(int ordinal)
{
return source.GetProviderSpecificValue(ordinal);
}
/// <inheritdoc />
public override int GetProviderSpecificValues(object[] values)
{
return source.GetProviderSpecificValues(values);
}
/// <inheritdoc />
public override DataTable GetSchemaTable()
{
return source.GetSchemaTable();
}
/// <inheritdoc />
public override Stream GetStream(int ordinal)
{
return source.GetStream(ordinal);
}
/// <inheritdoc />
public override TextReader GetTextReader(int ordinal)
{
return source.GetTextReader(ordinal);
}
/// <inheritdoc />
public override Task<bool> IsDBNullAsync(int ordinal, CancellationToken cancellationToken)
{
return source.IsDBNullAsync(ordinal, cancellationToken);
}
/// <inheritdoc />
public override Task<bool> ReadAsync(CancellationToken cancellationToken)
{
return source.ReadAsync(cancellationToken);
}
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1063:ImplementIDisposableCorrectly")]
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA1816:CallGCSuppressFinalizeCorrectly")]
public new void Dispose()
{
source.Dispose();
}
public new IDataReader GetData(int ordinal)
{
return source.GetData(ordinal);
}
}
}