C#里 如何序列化与反序列化 hashtable Dictionary及C#连接mysql数据库

using System.IO;
using System.Runtime.Serialization.Formatters.Binary;

Hashtable aa = new Hashtable();

private void buttonSave_Click(object sender, EventArgs e)
{
?FileStream fs = new FileStream("e:\\400tel .dat", FileMode.Create);
?BinaryFormatter bf = new BinaryFormatter();
?bf.Serialize(fs, aa);
?fs.Close();
}

private void buttonLoad_Click(object sender, EventArgs e)
{
?aa.Clear();
?FileStream fs = new FileStream("e:\\400tel.dat", FileMode.OpenOrCreate);
?BinaryFormatter bf = new BinaryFormatter();
?aa = (Hashtable)bf.Deserialize(fs);
?fs.Close();

}

?

?? //Dictionary<String, String> dic = new Dictionary<String, String>(13000000);

C#连接mysql数据库

string ConnectionString = "server = localhost; user id = XXXX; password = XXXX; database = XXXX";
string sqlString="......(此处sql语句省略)";
using (MySqlConnection connection = new MySqlConnection(connectionString))
??????????? {
??????????????? using (MySqlCommand cmd = new MySqlCommand(sqlString, connection))
??????????????? {
??????????????????? try
??????????????????? {
??????????????????????? connection.Open();
??????????????????????? int rows = cmd.ExecuteNonQuery();//执行sql语句
??????????????????????? return rows;
??????????????????? }
??????????????????? catch (MySql.Data.MySqlClient.MySqlException e)
??????????????????? {
??????????????????????? connection.Close();
??????????????????????? throw e;
??????????????????? }
??????????????? }
??????????? }

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下载 mysql-connector-net-6.4.3.rar

下载 mysql-connector-net-6.4.3-src.zip

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