Supported Data Types
The ASPxHiddenField control supports the following data types:
- System.String
- System.Guid
- System.Byte
- System.Int16
- System.Int32
- System.Int64
- System.Double
- System.Boolean
- System.Single
- System.Decimal
- System.Char
- Ststem.DateTime
- Regex
- DBNull
- Nullable<T>
List and Dictionary Type Support
ASPxHiddenField allows you to store values in containers (lists and dictionaries). These containers can have any nesting level. For example, the control can store a specifically designed business object with a set of key/value ({property name}/{property value}) pairs.
If the key in a key/value pair is set to String.Empty, ASPxHiddenField does not render.
If you add an IList or IDictionary object without custom type verification to the ASPxHiddenField control’s collection of key/value pairs, the control does not restore the object and generates a security warning.
To explicitly trust a data type for restore operations, call the DevExpress.Utils.BindToTypePolicy.RegisterTrustedClass method before you run your application:
static void Main() {
DevExpress.Utils.DeserializationSettings.RegisterTrustedClass(typeof(CustomClass));
// ...
}
Unsupported Types
ASPxHiddenField does not serialize objects of the following types into JavaScript client-side objects: