pkg
GSoft-inc/GSoft.Extensions.Configuration.Substitutionv1.1.1
✓ Verified.NET FW4.6.2.NET 6.0.NET Std2.0
⚠ Deprecated: Legacy
Suggested alternative: Workleap.Extensions.Configuration.Substitution
Variable substitution configuration provider implementation for Microsoft.Extensions.Configuration.
Get Started
$ dotnet add package GSoft.Extensions.Configuration.SubstitutionReadme
GSoft.Extensions.Configuration.Substitution
This package adds variable substitution configuration provider implementation for Microsoft.Extensions.Configuration.
Getting started
dotnet add package GSoft.Extensions.Configuration.Substitution
// Example for an ASP.NET Core web application
var builder = WebApplication.CreateBuilder(args);
// Setup your configuration
builder.Configuration.AddJsonFile("appsettings.json");
builder.Configuration.AddEnvironmentVariables();
builder.Configuration.AddSubstitution(); // <-- Add this after other configuration providers
How it works
You can reference configuration values inside other configuration values by enclosing the referenced configuration key like this: ${ReferencedConfigurationKey}.
Examples
Consider this appsettings.json:
{
"Credentials": {
"Username": "alice1",
"Password": "P@ssw0rd"
},
"ConnectionString": "usr=${Credentials:Username};pwd=${Credentials:Password}"
}
Evaluating the configuration value ConnectionString would return usr=alice1;pwd=P@ssw0rd.
This also works if you're using multiple configuration providers. For instance, one could have the Credentials:Password configuration value provided by a secret from Azure Key Vault and this value would have been injected into the ConnectionString value too.
It also works with arrays:
{
"Credentials": [ "alice1", "P@ssw0rd" ],
"ConnectionString": "usr=${Credentials:0};pwd=${Credentials:1}"
}