[英]How do I deserialize binary data into an object in .net Core, when the initial object was serialized with Full .net Framework?
我有一個應用程序,該應用程序將一些數據存儲在二進制字段的SQL數據庫中。 這些數據是使用二進制序列化從傳統.NET應用程序中的.net對象進行序列化的 。 我正在編寫一個.net核心應用程序,該應用程序需要與上述接口進行交互,但需要讀取二進制數據並使它們有意義。
理想情況下,我希望能夠使用.net Core反序列化這些數據,就像運行完整的.net框架一樣。 數據本身並不復雜,它們只是由舊的asp.net配置文件提供程序生成的Dictionary<string,string>
。
我需要從.net核心代碼讀取和寫入二進制數據。
我理解的BinaryFormatter的支持即將於.NET的核心。 在此期間,有什么不是很復雜我現在序列化與.NET的核心/反序列化數據為完整的.NET框架將能做到?
看來我們必須編寫我們自己的BinaryReader / BinaryWriter方法...
SCHEMA
CREATE TABLE dbo.BinaryTest (
BinaryData varbinary(max) NULL
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO
碼
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using System.IO;
namespace StackOverflow.ConsoleTester
{
public class Program
{
private const String SqlConnectionString = @"Server={Server};Database={Database};User={User};Password={Password};";
public static void Main(String[] args)
{
using (var db = new SqlConnection(SqlConnectionString))
{
var sqlCommand = new SqlCommand("DELETE FROM dbo.BinaryTest;", db) { CommandType = CommandType.Text };
db.Open();
sqlCommand.ExecuteNonQuery();
}
using (var db = new SqlConnection(SqlConnectionString))
{
var serializedData = new Dictionary<String, String> {{"key1", "value1"}, {"key2", "value2"}};
var binaryData = WriteBinaryData(serializedData);
var sqlCommand = new SqlCommand("INSERT INTO dbo.BinaryTest (BinaryData) VALUES (@BinaryData);", db) { CommandType = CommandType.Text };
var parameter = new SqlParameter("BinaryData", SqlDbType.VarBinary) {Value = binaryData};
sqlCommand.Parameters.Add(parameter);
db.Open();
sqlCommand.ExecuteNonQuery();
}
Dictionary<String, String> deserializedData = null;
using (var db = new SqlConnection(SqlConnectionString))
{
var sqlCommand = new SqlCommand("SELECT BinaryData FROM dbo.BinaryTest", db) { CommandType = CommandType.Text };
db.Open();
var reader = sqlCommand.ExecuteReader();
while (reader.Read())
{
deserializedData = ReadBinaryData(reader.GetSqlBinary(0));
}
}
if (deserializedData != null)
{
foreach (var item in deserializedData)
{
Console.WriteLine($"Key: {item.Key}; Value: {item.Value}");
}
}
Console.ReadKey();
}
private static Byte[] WriteBinaryData(Dictionary<String, String> data)
{
var memoryStream = new MemoryStream();
var binaryWriter = new BinaryWriter(memoryStream);
foreach (var item in data)
{
binaryWriter.Write(item.Key);
binaryWriter.Write(item.Value);
}
var binaryData = memoryStream.ToArray();
return binaryData;
}
private static Dictionary<String, String> ReadBinaryData(SqlBinary data)
{
var model = new Dictionary<String, String>();
var memoryStream = new MemoryStream(data.Value);
var binaryReader = new BinaryReader(memoryStream);
while (binaryReader.BaseStream.Position != binaryReader.BaseStream.Length)
{
model.Add(binaryReader.ReadString(), binaryReader.ReadString());
}
return model;
}
}
}
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