使用 ADO.NET 时创建 TCP 连接

使用 ADO.NET Connection 对象打开与 Cloud SQL for MySQL 的 TCP 连接。

深入探索

如需查看包含此代码示例的详细文档，请参阅以下内容：

代码示例

C#

如需向 Cloud SQL for MySQL 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为本地开发环境设置身份验证。

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;

        }
    }
}

后续步骤

如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅 Google Cloud 示例浏览器。