Databases
StackOverflow2013
Postsdbo
POC# XML serialization of derived classes
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POC# XML serialization of derived classes
    primarykey
    data
    text
    <p>Hi I am trying to serialize an array of objects which are derived from a class and I keep hitting the same error using c#. Any help is much appreciated.</p> <p>obviously this example has been scaled down for the purpose of this post in the real world Shape would contain a plethora of different shapes.</p> <p>Program.cs</p> <pre><code>namespace XMLInheritTests { class Program { static void Main(string[] args) { Shape[] a = new Shape[1] { new Square(1) }; FileStream fS = new FileStream("C:\\shape.xml", FileMode.OpenOrCreate); XmlSerializer xS = new XmlSerializer(a.GetType()); Console.WriteLine("writing"); try { xS.Serialize(fS, a); } catch (Exception e) { Console.WriteLine(e.InnerException.ToString()); Console.ReadKey(); } fS.Close(); Console.WriteLine("Fin"); } } } </code></pre> <p>Shape.cs</p> <pre><code>namespace XMLInheritTests { public abstract class Shape { public Shape() { } public int area; public int edges; } } </code></pre> <p>Square.cs</p> <pre><code>namespace XMLInheritTests { public class Square : Shape { public int iSize; public Square() { } public Square(int size) { iSize = size; edges = 4; area = size * size; } } } </code></pre> <p>Error: System.InvalidOperationException: The type XMLInheritTests.Square was not expected. Use the XmlInclude or SoapInclude attribute to specify types that are not known statically.</p> <p>at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterShapeA rray.Write2_Shape(String n, String ns, Shape o, Boolean isNullable, Boolean need Type) </p> <p>at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterShapeA rray.Write3_ArrayOfShape(Object o)</p> <p>Many Thanks</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. US111111
    plurals
    1. This table or related slice is empty.
    1. PL
      singulars
      1. LTDuplicate
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POC# XML serialization of derived classes
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POC# XML serialization of derived classes
      1. This table or related slice is empty.
      1. VTUpMod
    1. COAs a side-not, public fields are *usually* to be avoided; a `public int Size {get;set;}` would be preferable.
      singulars
      1. POC# XML serialization of derived classes
      1. USMarc Gravell
    2. COYou could *also* have the edges and size as virtual `get` properties, so that you don't need to **store** them.
      singulars
      1. POC# XML serialization of derived classes
      1. USMarc Gravell
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload