[cnforums1.2代码学习]4、关于论坛配置的序列化和反序列化做法

论坛配置的数据在WEB上存储是以HashTable方式来存储，但是在数据库中却已一个字段来存储这个HashTable
以序列化的方式将HashTable序列化为二进制数据存储到数据库中，需要的时候在来反序列化他。

 

HashTable类型是怎么序列化到数据库中的，代码如下：

 

//参照CnForums1.2\Data Providers\SqlDataProvider\SqlDataProvider.cs中代码
 public override void SaveSiteSettings(SiteSettings siteSettings)
 {
  BinaryFormatter binaryFormatter = new BinaryFormatter();
  MemoryStream ms = new MemoryStream();
  byte[] b;

 

 using( SqlConnection connection = GetSqlConnection() )
 {
   SqlCommand command = new SqlCommand(this.databaseOwner + ".forums_SiteSettings_Save", connection);
   command.CommandType = CommandType.StoredProcedure;

 

   // Serialize the SiteSettings
   //
   binaryFormatter.Serialize(ms, siteSettings.Settings);

 

   // Set the position of the MemoryStream back to 0
   //
   ms.Position = 0;
         
   // Read in the byte array
   //
   b = new Byte[ms.Length];
   ms.Read(b, 0, b.Length);

 

   // Set the parameters
   //
   command.Parameters.Add("@Application", SqlDbType.NVarChar,512).Value = siteSettings.SiteDomain;
   command.Parameters.Add("@ForumsDisabled", SqlDbType.SmallInt).Value = siteSettings.ForumsDisabled;
   command.Parameters.Add("@Settings", SqlDbType.VarBinary, 8000).Value = b;

 

   // Open the connection and exectute
   //
   connection.Open();
   command.ExecuteNonQuery();
  connection.Close();

 

 }

 

 binaryFormatter = null;
 ms = null;
}

 

 

 

如何取数据库中序列化的数，则应通过反序列化
反序列化的代码：
//
//参照CnForums1.2\Components\Provider\ForumsDataProvider.cs文件
//
public static SiteSettings PopulateSiteSettingsFromIDataReader(IDataReader dr)
{
        BinaryFormatter binaryFormatter = new BinaryFormatter();
        SiteSettings settings = new SiteSettings();
        MemoryStream ms = new MemoryStream();
        Byte[] b;

 

        b = (byte[]) dr["Settings"];

 

        // Read the byte array into a memory stream
        //
        ms.Write(b, 0, b.Length);

 

        // Set the memory stream position to the beginning of the stream
        //
        ms.Position = 0;

 

        // Set the internal hashtable
        //
        settings.Settings = (Hashtable) binaryFormatter.Deserialize(ms);

 

        // Set the SiteID
        //
        settings.SiteID = (int) dr["SiteID"];
        settings.SiteDomain = (string) dr["Application"];
    settings.ForumsDisabled = (bool)dr["ForumsDisabled"];

 

        return settings;
}