如何检查.NET Core中是否存在配置节? [英] How to check if Configuration Section exists in .NET Core?

问题描述

如何检查.NET Core的appsettings.json中是否存在配置节?

How can you check if a configuration section exists in the appsettings.json in .NET Core?

即使一个节不存在，以下代码也将始终返回实例化的实例.

Even if a section doesn't exist, the following code will always return an instantiated instance.

例如

var section = this.Configuration.GetSection<TestSection>("testsection");

推荐答案

查询配置子级，并检查是否有名称为"testsection"的子级

Query the children of Configuration and check if there is any with the name "testsection"

var sectionExists = Configuration.GetChildren().Any(item => item.Key == "testsection"));

如果"testsection"存在，则应返回true，否则返回false.

This should return true if "testsection" exists, otherwise false.

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