将自定义对象保存到应用程序设置不起作用

Question

I have a object in an application that saves settings for this application. The instance of this object is saved in the settings of the application.

[global::System.Configuration.ApplicationScopedSetting()]
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
public ReportingConfiguration ReportingConfiguration
{
    get { return ((ReportingConfiguration)(this["ReportingConfiguration"])); }
    set { this["ReportingConfiguration"] = value; }
}

At application start up the object is read out and if its null new instantiated. After that immediately saved.

// Get existing ReportingConfiguration or create new if null
var reportingConfiguration = Properties.Settings.Default.ReportingConfiguration;
if (reportingConfiguration == null)
{
    reportingConfiguration = new ReportingConfiguration();
    Properties.Settings.Default.ReportingConfiguration = reportingConfiguration;
    Properties.Settings.Default.Save();
}

When the settings are modified from the settings dialog and should be saved, the object is saved to the settings.

Properties.Settings.Default.ReportingConfiguration = _reportingConfiguration;
Properties.Settings.Default.Save();

However, when I restart the application, the read out object is null again. This happens at debugging and also when I try it to start without debugging.

What am I doing wrong? Is it even possible to save a custom object to settings?

Answer 1

Seems like you want to serialize your settings based on objects. I would recommend using Newtonsoft Json.NET .

Serialize your object into a JSON string when ever you want to save it to your settings. Deserialize the setting string to the actual object when reading out your setting.