How to read JSON configuration files in C# projects in vs.

The file content is as follows

{
	"Data": 
	{
		"DefaultConnection": 
		{
			"ConnectionString": "Server=(localdb)\\MSSQLLocalDB;Database=Books;Trusted_Connection=True;"
		}
	},
	"Appsettings": 
	{
 "Name": "XiaoLi",
 "Date": "2020-04-18",
 "age": "20"
 },
 "url":"/weixin_42686768"
}

Setting up configuration files

Right-click the project file - Properties - Change the value of the "Copy to Output Directory" item to "Always Copy"

Add a reference

using ;
using ;
using ;

public static string GetConnectionString(string value)
{
 var configurationBuilder = new ConfigurationBuilder()
 .SetBasePath(())
 .AddJsonFile("");

 //var configurationBuilder = new ConfigurationBuilder()
 // .Add(new JsonConfigurationSource { Path = "", ReloadOnChange = true });

 IConfiguration config = ();
 string connectionString = config[value];
 return connectionString;
}

// 1. Get the string corresponding to ConnectionStringva = "Data:DefaultConnection:ConnectionString";
// 2. Get the string corresponding to Nameva = "Appsettings:Name";
// 3. Get the string corresponding to urlva = "url";

GetConnectionString(va)

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