将 appSettings.json 对象映射到具有不同 Json 属性名称的类

Question

I am trying to map a JSON object in settings.json to a concrete class that has JSON Property Name matching the JSON object in settings.

public class GoogleServiceAccount
    {
        [JsonPropertyName("type")]
        public string Type { get; set; }

        [JsonPropertyName("project_id")]
        public string ProjectId { get; set; }

        [JsonPropertyName("private_key_id")]
        public string PrivateKeyId { get; set; }
    }

appSettings.json

"GoogleServiceAccount": {
    "type": "service_account",
    "project_id": "xxxxxx-xxxx",
    "private_key_id": "xxxxxxxxxx"
}

Program.cs

builder.Services.Configure<GoogleServiceAccount>(configuration.GetSection("GoogleServiceAccount"));

EmailService.cs

    public class EmailService
    {
        private readonly GoogleServiceAccount _gmailCredentials;
        public EmailService(IOptions<GoogleServiceAccount> credentials)
        {
            _gmailCredentials = credentials.Value;
        }
    }

Issue: I am getting null values in EmailService class for GoogleServiceAccount

Solution: Since I am using .NET 6, ConfigurationKeyName instead of JsonPropertyName worked.

public class GoogleServiceAccount
        {
            [ConfigurationKeyName("type")]
            public string Type { get; set; }
    
            [ConfigurationKeyName("project_id")]
            public string ProjectId { get; set; }
    
            [ConfigurationKeyName("private_key_id")]
            public string PrivateKeyId { get; set; }
        }

Answer 1

Configure like this code in your Program.cs :

builder.Services.Configure<GoogleServiceAccount>(o=> {
    o.Type = builder.Configuration["GoogleServiceAccount:type"];
    o.ProjectId = builder.Configuration["GoogleServiceAccount:project_id"];
    o.PrivateKeyId = builder.Configuration["GoogleServiceAccount:private_key_id"];

});

Demo