在 settings.settings 中添加自定义类型

Question

I would like to use configuration file.settings to save this struct:

struct sR22Protocole
{
    Int32 inputkey;
    Int32 outputkey;
    Int32 voltage;
    Int32 Ohm;
    Int32 Correction;
};

In the settings designer, I can add different type but it doesn't show my struct in the browse section. Is there any way that the designer has access to my struct? If no, Is there any way to add it programmaticaly?

Answer 1

Your type must have a System.Configuration.SettingsSerializeAsAttribute attribute. An enum parameter of type System.Configuration.SettingsSerializeAs specifies how the value will be serialized, the possible values are:

• String
• Xml
• Binary
• ProviderSpecific

Since this attribute can only be applied to class types, your own type has to be a class.

Secondly, the type must have a parameterless constructor. This is because a default instance of the type of the setting must be able to be assinged.

If you have just declared your class, the designer won't accept the type unless you have built your solution.

Answer 2

I believe the class (or struct?) must be able to be serialized to use in the settings file. I followed this blog post when I did this for a default object in an application:

http://www.blackwasp.co.uk/CustomAppSettings.aspx

Answer 3

Just go into the browse section and type your struct, class or enum name while prefixing it by the namespace of your type. Then, it would also be added in the dropdown for your next uses.

In your example: YourTypeNamespace.sR22Protocole

Answer 4

It is actually not needed to add attributes etc. If you make sure that the class is serializable like Parameterless constructor and public properties, it will still work.