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using System;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
namespace IssueVision
{
// The SerializationHelper class contains Serialize / Deserialize methods for
// storing data on the client machine securely. Data objects are first serialized
// to a binary stream, then encrypted, then written to disk (typically in the
// UserApplicationDataPath location).
public class SerializationHelper
{
public static void Serialize(object data, string filePath)
{
try
{
// 1. Open the file
StreamWriter fs = new StreamWriter(filePath, false);
try
{
MemoryStream streamMemory = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter();
// 2. Serialize the dataset object using the binary formatter
formatter.Serialize(streamMemory, data);
// 3. Encrypt the binary data
string binaryData = Convert.ToBase64String(streamMemory.GetBuffer());
string cipherData = DataProtection.Encrypt(binaryData, DataProtection.Store.User);
// 4. Write the data to a file
fs.Write(cipherData);
}
finally
{
// 5. Close the file
fs.Flush();
fs.Close();
}
}
catch
{
// Eat exception if this fails.
}
}
public static object Deserialize( string filePath)
{
object data = new object();
try
{
// 1. Open the file
StreamReader sr = new StreamReader(filePath);
try
{
MemoryStream streamMemory;
BinaryFormatter formatter = new BinaryFormatter();
// 2. Read the binary data, and convert it to a string
string cipherData = sr.ReadToEnd();
// 3. Decrypt the binary data
byte[] binaryData = Convert.FromBase64String(DataProtection.Decrypt(cipherData, DataProtection.Store.User));
// 4. Rehydrate the dataset
streamMemory = new MemoryStream(binaryData);
data = formatter.Deserialize(streamMemory);
}
catch
{
// data could not be deserialized
data = null;
}
finally
{
// 5. Close the reader
sr.Close();
}
}
catch
{
// file doesn't exist
data = null;
}
return data;
}
}
}
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Weidong has been an information system professional since 1990. He has a Master's degree in Computer Science, and is currently a MCSD .NET