Question

我做了app.config。现在我想创建新文件“.cs”，我想访问我在“app.config”中使用的凭据..我在现有的“.cs”中使用...但是想制作新的“.CS”文件......所以我很容易处理我想要做的改变..plz help

namespace CommoditiesControl.RatePuller
{
    public class DBConnect
    {
        private MySqlConnection connection;
        private string server;
        private int port;
        private string database;
        private string uid;
        private string password;

        //Constructor
        public DBConnect()
        {
            Initialize();
        }

        //Initialize values
        private void Initialize()
        {

            string DBserver = ConfigurationManager.AppSettings["server"];
            int DBport = Convert.ToInt32(ConfigurationManager.AppSettings["port"]);
            string DBdatabase = ConfigurationManager.AppSettings["eagri"];
            string uid = ConfigurationManager.AppSettings["test"];
            string password = ConfigurationManager.AppSettings[""];
        }
        string connectionString;
        connectionString = "SERVER=" + server + ";" +
                            "DATABASE=" + database + ";" +
                            "User Id=" + uid + ";" +
                            "PASSWORD=" + password + ";" +
                            "PORT=" + port + ";" +
                            "Connect Timeout=240";
        // string connectionString = "server=localhost;User Id=test;database=eagri;port=13306";
        connection = new MySqlConnection(connectionString);
    }

    //open connection to database
    private bool OpenConnection()
    {
        try
        {
            connection.Open();
            return true;
        }
        catch (MySqlException ex)
        {
            //The two most common error numbers when connecting are as follows:
            //0: Cannot connect to server, access denied.
            //1045: Invalid user name and/or password.
            switch (ex.Number)
            {
                case 0:
                    Console.WriteLine("Cannot connect to server.  Access Denied");
                    break;

                case 1045:
                    Console.WriteLine("Invalid username/password, please try again");
                    break;

                default:
                    Console.WriteLine("Unable to connect to mysql server, unknown error {0}", ex.ToString());
                    break;
            }
            return false;
        }

    }

    //Close connection
    public bool CloseConnection()
    {
        try
        {
            connection.Close();
            return true;
        }
        catch (MySqlException ex)
        {
            Console.WriteLine(ex.Message);
            return false;
        }
    }

    //Insert statement
    public void Insert(string query)
    {
        //open connection
        if (this.OpenConnection() == true)
        {
            //create command and assign the query and connection from the constructor
            MySqlCommand cmd = new MySqlCommand(query, connection);

            //Execute command
            cmd.ExecuteNonQuery();

            //close connection
            this.CloseConnection();
        }
    }

    //Update statement
    public void Update(string query)
    {
        //Open connection
        if (this.OpenConnection() == true)
        {
            //create mysql command
            MySqlCommand cmd = new MySqlCommand();
            //Assign the query using CommandText
            cmd.CommandText = query;
            //Assign the connection using Connection
            cmd.Connection = connection;

            //Execute query
            int i = cmd.ExecuteNonQuery();

            Console.WriteLine("DB update result: {0} updated", i);

            //close connection
            this.CloseConnection();
        }
    }

    //Delete statement
    public void Delete(string query)
    {
        if (this.OpenConnection() == true)
        {
            MySqlCommand cmd = new MySqlCommand(query, connection);
            cmd.ExecuteNonQuery();
            this.CloseConnection();
        }
    }

    //Select statement
    public MySqlDataReader Select(string query)
    {
        MySqlDataReader dataReader = null;

        //Open connection
        if (this.OpenConnection() == true)
        {
            //Create Command
            MySqlCommand cmd = new MySqlCommand(query, connection);
            //Create a data reader and Execute the command
            dataReader = cmd.ExecuteReader();
        }

        return dataReader;
    }

    //Count statement
    public int Count(string query)
    {
        int Count = -1;

        //Open Connection
        if (this.OpenConnection() == true)
        {
            //Create Mysql Command
            MySqlCommand cmd = new MySqlCommand(query, connection);

            //ExecuteScalar will return one value
            Count = int.Parse(cmd.ExecuteScalar() + "");

            //close Connection
            this.CloseConnection();
        }
        return Count;
    }

    //Backup
    public void Backup()
    {
    }

    //Restore
    public void Restore()
    {
    }

}

}

Answer 1

connection = DBServer;
port = DBport;
database = DBdatabase;
etc...

但请记住，您的应用程序在应用程序加载时加载Configigurationfile一次，因此如果更改运行时，需要强制更新它以获取新值 Change appconfig on runtime

想创建“.cs”文件，其中可以包含我的app.config成员

1 个答案: