C＃中的二进制序列化

Question

I am trying to serialize a class object using binary serialization in C#. I have tried and everywhere all I can find that the serialized data goes to a file always in all the examples I have seen.

In my case, I have to store the serialized data in SQL. The following is an example of the method I have created.

//Serializing the List
public void Serialize(Employees emps, String filename)
{
    //Create the stream to add object into it.
    System.IO.Stream ms = File.OpenWrite(filename); 
    //Format the object as Binary

    BinaryFormatter formatter = new BinaryFormatter();
    //It serialize the employee object
    formatter.Serialize(ms, emps);
    ms.Flush();
    ms.Close();
    ms.Dispose();
}

How can I get the serialized data directly in a string variable? I don't want to use a file.

Please help.

Answer 1

Just use MemoryStream ms = new MemoryStream() instead of your file stream. You can extract a byte[] for Storage to SQL after serializing by calling ms.ToArray() .

And don't forget to put your Stream into a using -Statement, to guarantee correct disposal of the allocated resources.

Answer 2

The easiest way to represent a byte array as a string in C# is with base64 encoding. The below example shows how this would be achieved within your code.

        public void Serialize(Employees emps, String filename)
        {
            //Create the stream to add object into it.
            MemoryStream ms = new MemoryStream();

            //Format the object as Binary

            BinaryFormatter formatter = new BinaryFormatter();
            //It serialize the employee object
            formatter.Serialize(ms, emps);

            // Your employees object serialised and converted to a string.
            string encodedObject = Convert.ToBase64String(ms.ToArray());

            ms.Close();
        }

This creates the string encodedObject . To retrieve the byte array and your serialised object back from the string you will use the below code.

            BinaryFormatter bf = new BinaryFormatter();

            // Decode the string back to a byte array
            byte[] decodedObject = Convert.FromBase64String(encodedObject);

            // Create a memory stream and pass in the decoded byte array as the parameter
            MemoryStream memoryStream = new MemoryStream(decodedObject);

            // Deserialise byte array back to employees object.
            Employees employees = bf.Deserialize(memoryStream);