不支持关键字:ASP.NET MVC 应用程序中的 'port' 错误

Keyword not supported: 'port' error in ASP.NET MVC application

我正在尝试创建一个 API 服务器,我需要访问 MySQL 数据库。我有这段代码:

public static class Database
{
        private const string ConnectionString = "Server=localhost;Port=3306;Database=contoso_inc;Uid=root;Pwd=f6e527xp;";

        public static IEnumerable<User> Execute(string query)
        {
            using (var connection = new SqlConnection(ConnectionString))
            {
                var command = new SqlCommand(query, connection);
                connection.Open();
                
                var reader = command.ExecuteReader();
                var result = new List<User>();
                
                while (reader.Read())
                {
                    var user = new User
                    {
                        year = (uint) reader.GetValue(0),
                        month = (string) reader.GetValue(1),
                        users_num = (uint) reader.GetValue(2)
                    };
                    
                    result.Add(user);

                }
                
                reader.Close();

                return result;
            }
        }
}

错误出现在这一行:connection.Open();。所以显然我出于某种原因不能使用 Port。有什么问题?

P.S。我看过相关问题,但大部分属于Entity Framework话题。我这里没有DbContext,所以没用。

端口在 Server 关键字中指定,在您的示例中使用:

"Server=localhost, 3306;Database=contoso_inc;Uid=root;Pwd=f6e527xp;"

此处记录了连接字符串:https://docs.microsoft.com/en-us/dotnet/api/system.data.sqlclient.sqlconnection.connectionstring?view=dotnet-plat-ext-5.0

查看 SqlConnection.ConnectionString 的文档,我没有看到任何“端口”密钥的迹象。如果需要指定端口,可以在Server部分指定:

The name or network address of the instance of SQL Server to which to connect. The port number can be specified after the server name:

server=tcp:servername, portnumber

所以也许您想要:“Server=localhost,3306;...”或“Server=tcp:localhost,3306;...”- 如果您真的认为您确实需要指定端口全部.

我认为您使用了错误的连接驱动程序。 尝试安装这个 nuget 包

Install-Package MySql.Data -Version 8.0.26

那么,你可以这样做:

public static class Database
{
    private const string ConnectionString = "Server=localhost;Port=3306;Database=contoso_inc;Uid=root;Pwd=f6e527xp;";

    public static IEnumerable<User> Execute(string query)
    {
        using (var connection = new MySql.Data.MySqlClient.MySqlConnection(ConnectionString))
        {
            var command = new MySqlCommand(query, connection);
            connection.Open();
            
            var reader = command.ExecuteReader();
            var result = new List<User>();
            
            while (reader.Read())
            {
                var user = new User
                {
                    year = (uint) reader.GetValue(0),
                    month = (string) reader.GetValue(1),
                    users_num = (uint) reader.GetValue(2)
                };
                
                result.Add(user);

            }
            
            reader.Close();

            return result;
        }
    }
}