使用 ADO.NET 时实现指数退避算法
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使用 Polly .NET 库中的 ADO.NET 连接到 Cloud SQL for PostgreSQL 时通过指数退避算法重试失败的连接。
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代码示例
C#
如需向 Cloud SQL for PostgreSQL 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。
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[[["易于理解","easyToUnderstand","thumb-up"],["解决了我的问题","solvedMyProblem","thumb-up"],["其他","otherUp","thumb-up"]],[["很难理解","hardToUnderstand","thumb-down"],["信息或示例代码不正确","incorrectInformationOrSampleCode","thumb-down"],["没有我需要的信息/示例","missingTheInformationSamplesINeed","thumb-down"],["翻译问题","translationIssue","thumb-down"],["其他","otherDown","thumb-down"]],[],[],[],null,["# Implement exponential backoff when using ADO.NET\n\nRetry a failed connection by using exponential backoff when connecting to Cloud SQL for PostgreSQL by using ADO.NET with the Polly .NET library.\n\nExplore further\n---------------\n\n\nFor detailed documentation that includes this code sample, see the following:\n\n- [Manage database connections](/sql/docs/postgres/manage-connections)\n\nCode sample\n-----------\n\n### C#\n\n\nTo authenticate to Cloud SQL for PostgreSQL, set up Application Default Credentials.\nFor more information, see\n\n[Set up authentication for a local development environment](/docs/authentication/set-up-adc-local-dev-environment).\n\n Policy\n .Handle\u003cNpgsqlException\u003e()\n .WaitAndRetry(new[]\n {\n TimeSpan.FromSeconds(1),\n TimeSpan.FromSeconds(2),\n TimeSpan.FromSeconds(5)\n })\n .Execute(() =\u003e connection.Open());\n\nWhat's next\n-----------\n\n\nTo search and filter code samples for other Google Cloud products, see the\n[Google Cloud sample browser](/docs/samples?product=cloud_sql_postgres)."]]