c# - MySqlConnection = new MySqlConnection(string) 不起作用

Question

这是我在 Visual Studio 中连接到 Unity3d 的代码:

public void SetupSQLConnection()
{
    Debug.Log("Connection Function Started");
    if (connection == null)
    {
        Debug.Log("If connection == null");
        try
        {
            Debug.Log("Try block started");
            string connectionString = "Server=localhost;" + "Database=therapygame;" + "UID=root;" + "Password=;";
            Debug.Log("string set");
            connection = new MySqlConnection(connectionString);
            Debug.Log("new MySqlConnection");
            connection.Open();
            Debug.Log("connection");
        }
        catch (MySqlException ex)
        {
            Debug.LogError("MySQL Error: " + ex.ToString());
        }
    }
}

控制台字符串一直打印到“字符串集”，但其余部分不会打印。

这是 Unity 中的错误:

KeyNotFoundException: The given key was not present in the dictionary. System.Collections.Generic.Dictionary`2[System.String,System.Object].get_Item (System.String key) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.Collections.Generic/Dictionary.cs:150) MySql.Data.MySqlClient.MySqlConnectionStringBuilder.get_Database () MySql.Data.MySqlClient.MySqlConnection.set_ConnectionString (System.String value) MySql.Data.MySqlClient.MySqlConnection..ctor (System.String connectionString) (wrapper remoting-invoke-with-check) MySql.Data.MySqlClient.MySqlConnection:.ctor (string) mysql.SetupSQLConnection () (at Assets/mysql.cs:31) fire_rate.Start () (at Assets/fire_rate.cs:18)

Answer 1

试试这个

MySqlConnectionStringBuilder connBuilder = new MySqlConnectionStringBuilder();

                    connBuilder.Server = "localhost";
                    connBuilder.UserID = "root";
                    connBuilder.Database = "therapygame";
                    connBuilder.Password = "";
                    connBuilder.OldGuids = true;

                connection = new MySqlConnection(connBuilder.ConnectionString);