ASP.NET Core appsettings.json update in code

Question

I am currently working on project using asp.net core v1.1, and in my appsettings.json I have:

\"AppSettings\": {
   \"AzureConnectionKey\": \"***\",
   \"Azu         


        

Answer 1

Update appsettings.json file in asp.net core runtime

Sample appsettings.json file

{
  Config: {
     IsConfig: false
  }
}

Code to update IsConfig property to true

Main(){

 AddOrUpdateAppSetting("Config:IsConfig", true);

}



public static void AddOrUpdateAppSetting(string key, T value) {
            try {   

                var filePath = Path.Combine(AppContext.BaseDirectory, "appSettings.json");
                string json = File.ReadAllText(filePath);
                dynamic jsonObj = Newtonsoft.Json.JsonConvert.DeserializeObject(json);

                var sectionPath = key.Split(":")[0];
                if (!string.IsNullOrEmpty(sectionPath)) {
                    var keyPath = key.Split(":")[1];
                    jsonObj[sectionPath][keyPath] = value;
                }
                else {
                    jsonObj[sectionPath] = value; // if no sectionpath just set the value
                }
                string output = Newtonsoft.Json.JsonConvert.SerializeObject(jsonObj, Newtonsoft.Json.Formatting.Indented);
                File.WriteAllText(filePath, output);

            }
            catch (ConfigurationErrorsException) {
                Console.WriteLine("Error writing app settings");
            }
        }