Question

我正在开发与免费托管网站上托管的MySQL数据库交互的C＃应用程序：

private void Initialize()
{
    server = "ex.exexexex.com:3306";
    database = "1_dotnet";
    uid = "1_dotnet";
    password = "********";
    connectionString = "SERVER=" + server + ";" + "DATABASE=" + database + ";" + "UID=" + uid + ";" + "PASSWORD=" + password + ";";

    connection = new MySqlConnection(connectionString);
}

private bool OpenConnection()
{
    try
    {
        connection.Open();
        return true;
    }
    catch (MySqlException ex)
    {
        MessageBox.Show(ex.Message.ToString());
        return false;
    }
}

但是有一个错误：

无法连接到任何指定的MySQL主机。

Answer 1

我会在你的web.config中使用连接字符串设置

<connectionStrings>
    <add name="strConnection" connectionString="Data Source=DATABASE_IP_OR_DOMAIN;userid=MYSQL_LOGIN;password=MYSQL_PASSWORD;database=DATABASE_NAME;Connection Lifetime=0;Connect Timeout=300;pooling='true';Max Pool Size=200" providerName="MySql.Data.MySqlClient"/>
</connectionStrings>

然后在您的C＃代码中，您可以像这样引用您的数据库连接

MySqlConnection objConnection = new MySqlConnection(ConfigurationManager.ConnectionStrings["strConnection"].ConnectionString);
MySqlCommand cmd = default(MySqlCommand);
objConnection.Open();

使用mysql数据库的c＃应用程序

1 个答案: