Question

好的，所以我试图用C＃/ .NET创建一个需要数据库的简单程序。我已经阅读了一些内容并尝试建立连接，但出于某种原因，我的计算机无法连接到服务器（localhost）。我已经在我的PC上成功安装了MySQL Connector / NET和MySQL，我使用workbench来创建数据库表。我的代码是：

 class DBconnect
{
    private MySqlConnection connection;
    private string server;
    private string database;
    private string uid;
    private string password;

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

    //Initialize values
    private void Initialize()
    {
        server = "localhost";
        database = "clientsdb";
        uid = "root";
        password = "password";
        string connectionString;
        connectionString = "SERVER=" + server + ";" + "DATABASE=" + database + ";" + "UID=" + uid + ";" + "PASSWORD=" + password + ";";
        //connectionString = "datasource=" + server + ";port=3306;username=" + uid + ";password=" + password + ";";

        connection = new MySqlConnection(connectionString);
    }

    //open connection to database
    private bool OpenConnection()
    {
        try
        {
            connection.Open();
            return true;
        }
        catch (MySqlException ex)
        {
            //0: Cannot connect to server.
            //1045: Invalid user name and/or password.
            switch (ex.Number)
            {
                case 0:
                    MessageBox.Show("Cannot connect to server.  Contact administrator");
                    break;

                case 1045:
                    MessageBox.Show("Invalid username/password, please try again");
                    break;
            }
            return false;
        }
    }

我已尝试过＆＃34; connectionString＆＃34; -s但是当我尝试使用OpenConnection函数时，它让我无法连接到服务器错误。我做错了什么？

Answer 1

使用https://www.connectionstrings.com/mysql/我得到一个像这样的连接字符串：

connectionString = "Server=" + server + ";" + "Database=" + database + ";" + "Uid=" + uid + ";" + "Pwd=" + password + ";";

应该有用。

无法与mySQL创建C＃连接

1 个答案: