I have an ASP.NET Core MVC application that might be restarted from time to time (maintenance); how can make some variable values persistent from an execution to the next?
PS: That's the code that needs to write value as persistent. For example "LastMaintenanceRestartTime = 03/04-2020", the maintenance restart occurs once a day so the code needs to remember the last time it was restarted.
In UWP, I could do the following code but I can't seem to find an equivalent for ASP.NET Core:
Windows.Storage.ApplicationData.Current.LocalSettings.Values[key] = value;
The best I could find is the following code but the values are only persistent within the same execution:
AppDomain.CurrentDomain.SetData(key, value);
Some talk about "Application.Settings" but I can't seem to be able to reach this namespace...
I've also seen some people talking about "AppSettings" files that can be modified during execution but it seems rather complex to keep a simple value persistent...
Do you have any recommendation, solution or ideas for me?
I found the solution:
static void ReadSetting(string key)
{
try
{
var appSettings = ConfigurationManager.AppSettings;
string result = appSettings[key] ?? "Not Found";
Console.WriteLine(result);
}
catch (ConfigurationErrorsException)
{
Console.WriteLine("Error reading app settings");
}
}
static void AddUpdateAppSettings(string key, string value)
{
try
{
var configFile = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
var settings = configFile.AppSettings.Settings;
if (settings[key] == null)
{
settings.Add(key, value);
}
else
{
settings[key].Value = value;
}
configFile.Save(ConfigurationSaveMode.Modified);
ConfigurationManager.RefreshSection(configFile.AppSettings.SectionInformation.Name);
}
catch (ConfigurationErrorsException)
{
Console.WriteLine("Error writing app settings");
}
}