使用 ADO.NET 時建立 TCP 連線

使用 ADO.NET 連線物件開啟與 MySQL 適用的 Cloud SQL 之間的 TCP 連線。

深入探索

如需包含這個程式碼範例的詳細說明文件，請參閱下列內容：

程式碼範例

C#

如要向 MySQL 適用的 Cloud SQL 進行驗證，請設定應用程式預設憑證。 詳情請參閱「為本機開發環境設定驗證」。

using MySql.Data.MySqlClient;
using System;

namespace CloudSql
{
    public class MySqlTcp
    {
        public static MySqlConnectionStringBuilder NewMysqlTCPConnectionString()
        {
            // Equivalent connection string:
            // "Uid=<DB_USER>;Pwd=<DB_PASS>;Host=<INSTANCE_HOST>;Database=<DB_NAME>;"
            var connectionString = new MySqlConnectionStringBuilder()
            {
                // Note: Saving credentials in environment variables is convenient, but not
                // secure - consider a more secure solution such as
                // Cloud Secret Manager (https://cloud.google.com/secret-manager) to help
                // keep secrets safe.
                Server = Environment.GetEnvironmentVariable("INSTANCE_HOST"),   // e.g. '127.0.0.1'
                // Set Host to 'cloudsql' when deploying to App Engine Flexible environment
                UserID = Environment.GetEnvironmentVariable("DB_USER"),   // e.g. 'my-db-user'
                Password = Environment.GetEnvironmentVariable("DB_PASS"), // e.g. 'my-db-password'
                Database = Environment.GetEnvironmentVariable("DB_NAME"), // e.g. 'my-database'

                // The Cloud SQL proxy provides encryption between the proxy and instance.
                SslMode = MySqlSslMode.Disabled,
            };
            connectionString.Pooling = true;
            // Specify additional properties here.
            return connectionString;

        }
    }
}

後續步驟

如要搜尋及篩選其他 Google Cloud 產品的程式碼範例，請參閱Google Cloud 範例瀏覽器。