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  • 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;
                        }
                    }
                }

    下载 mysql-connector-net-6.4.3.rar

    下载 mysql-connector-net-6.4.3-src.zip

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  • 原文地址:https://www.cnblogs.com/jishu/p/2145605.html
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