我试图在应用程序设置中存储自定义对象的集合.
从this related question的一些帮助,这里是我目前拥有的：
// implementing ApplicationSettingsBase so this shows up in the Settings designer's
// browse function
public class PeopleHolder : ApplicationSettingsBase
{
[UserScopedSetting()]
[SettingsSerializeAs(System.Configuration.SettingsSerializeAs.Xml)]
public ObservableCollection<Person> People { get; set; }
}
[Serializable]
public class Person
{
public String FirstName { get; set; }
}
public MainWindow()
{
InitializeComponent();
// AllPeople is always null,not persisting
if (Properties.Settings.Default.AllPeople == null)
{
Properties.Settings.Default.AllPeople = new PeopleHolder()
{
People = new ObservableCollection<Person>
{
new Person() { FirstName = "bob" },new Person() { FirstName = "sue" },new Person() { FirstName = "bill" }
}
};
Properties.Settings.Default.Save();
}
else
{
MessageBox.Show(Properties.Settings.Default.AllPeople.People.Count.ToString());
}
}
在Settings.Settings Designer中,我通过浏览器按钮添加了PeopleHolder类型的属性,并将范围设置为“User”. Save()方法似乎成功完成,没有错误消息,但每次重新启动应用程序设置都不会保留.
虽然在上面的代码中没有显示,我可以坚持Strings,只是不是我的自定义集合(我注意到在其他类似的问题,有时可能有版本号的问题,这阻止了在调试时保存设置,所以我想规则作为可能的罪魁祸首.)
有任何想法吗？我确定有一个非常简单的方法来做到这一点,我只是想念:).
谢谢你的帮助！
解决方法
我想出了
this question！
正如我在这个问题中所提到的那样,我把它添加到Settings.Designer.cs中：
[global::System.Configuration.UserScopedSettingAttribute()]
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
public ObservableCollection<Person> AllPeople
{
get
{
return ((ObservableCollection<Person>)(this["AllPeople"]));
}
set
{
this["AllPeople"] = value;
}
}
然后我需要的是以下代码：
[Serializable]
public class Person
{
public String FirstName { get; set; }
}
public MainWindow()
{
InitializeComponent();
// this now works!!
if (Properties.Settings.Default.AllPeople == null)
{
Properties.Settings.Default.AllPeople = new ObservableCollection<Person>
{
new Person() { FirstName = "bob" },new Person() { FirstName = "bill" }
};
Properties.Settings.Default.Save();
}
else
{
MessageBox.Show(Properties.Settings.Default.AllPeople.People.Count.ToString());
}
}
