I am trying to serialize an instance of the QDatatables class provided below, but I am getting error :
An exception of type 'System.InvalidOperationException' occurred in System.Xml.dll but was not handled in user code Additional information: There was an error reflecting type 'System.Collections.ObjectModel.ObservableCollection`1[DataRetrieval.Model.QDatatable]'.
StackTrace: at System.Xml.Serialization.XmlReflectionImporter.InitializeStructMembers(StructMapping mapping, StructModel model, Boolean openModel, String typeName, RecursionLimiter limiter) at System.Xml.Serialization.XmlReflectionImporter.ImportStructLikeMapping(StructModel model, String ns, Boolean openModel, XmlAttributes a, RecursionLimiter limiter) at System.Xml.Serialization.XmlReflectionImporter.ImportTypeMapping(TypeModel model, String ns, ImportContext context, String dataType, XmlAttributes a, Boolean repeats, Boolean openModel, RecursionLimiter limiter)
InnerException: {"System.Tuple`2[System.String,System.String] cannot be serialized because it does not have a parameterless constructor."}
Can anyone help to find what is missing?
My serlializing function:
public string serialize()
{
StringWriter sw = new StringWriter();
XmlSerializer s = new XmlSerializer(this.GetType());
s.Serialize(sw, this);
return sw.ToString();
}
QDatatables class:
[Serializable()]
public class QDatatables : BindableBase
{
private ObservableCollection<QDatatable> _list;
public ObservableCollection<QDatatable> List
{
get { return _list ?? (_list=new ObservableCollection<QDatatable>()); }
set { SetProperty(ref _list, value); }
}
public string serialize()
{
StringWriter sw = new StringWriter();
XmlSerializer s = new XmlSerializer(typeof(ObservableCollection<QDatatable>));
s.Serialize(sw, List);
return sw.ToString();
}
}
QDatatable Class
[Serializable()]
public class QDatatable : BindableBase
{
private int _id;
public int ID
{
get { return _id; }
set { SetProperty(ref _id, value); }
}
private String _name;
public String Name
{
get { return _name; }
set { SetProperty(ref _name, value); }
}
private WhereParams _params;
public WhereParams Params
{
get { return _params; }
set { SetProperty(ref _params, value); }
}
private bool _isexpanded;
public bool IsExpanded
{
get { return _isexpanded; }
set { SetProperty(ref _isexpanded, value); }
}
}
WhereParam Class:
public class WhereParams : BindableBase
{
private Dictionary<int, WhereParam> _dictionaryIdToWhereParam;
private ObservableCollection<WhereParam> _list;
public ObservableCollection<WhereParam> List
{
get { return _list ?? (_list = new ObservableCollection<WhereParam>()); }
set { SetProperty(ref _list, value); }
}
public WhereParam GetById(int id)
{
return List.First(w => w.ID == id);
}
public string serialize()
{
StringWriter sw = new StringWriter();
XmlSerializer s = new XmlSerializer(this.GetType());
s.Serialize(sw, this);
return sw.ToString();
}
}
[Serializable()]
public class WhereParam:BindableBase
{
private int _id;
public int ID
{
get { return _id; }
set { SetProperty(ref _id, value); }
}
private string _name;
public string Name
{
get { return _name; }
set { SetProperty(ref _name, value); }
}
private ParamType _type;
public ParamType Type
{
get { return _type; }
set { SetProperty(ref _type, value); }
}
}
ParamType Class:
[XmlInclude(typeof(DateTimeType))]
[XmlInclude(typeof(StringType))]
[XmlInclude(typeof(IntType))]
[XmlInclude(typeof(FloatgType))]
[XmlInclude(typeof(BoolType))]
[XmlInclude(typeof(NullableBoolType))]
[XmlInclude(typeof(ListMulti))]
[XmlInclude(typeof(ListSingle))]
[XmlInclude(typeof(StringMulti))]
public class ParamType: BindableBase
{
private int _typeID;
public int TypeID
{
get { return _typeID; }
set { SetProperty(ref _typeID, value); }
}
private ParamTypeEnum _typeName;
public ParamTypeEnum TypeName
{
get { return _typeName; }
set { SetProperty(ref _typeName, value); }
}
}
public class DateTimeType : ParamType
{
private DateTime? _datefrom;
public DateTime? Datefrom
{
get { return _datefrom; }
set { SetProperty(ref _datefrom, value); }
}
private DateTime? _dateTo;
public DateTime? DateTo
{
get { return _dateTo; }
set {
SetProperty(ref _dateTo, value); }
}
}
public class StringType : ParamType
{
private string _stringContent;
public string StringContent
{
get { return _stringContent; }
set {
SetProperty(ref _stringContent, value); }
}
}
public class IntType : ParamType
{
private int _intContent;
public int IntContent
{
get { return _intContent; }
set { SetProperty(ref _intContent, value); }
}
}
public class FloatgType : ParamType
{
private float _floatContent;
public float FloatContent
{
get { return _floatContent; }
set { SetProperty(ref _floatContent, value); }
}
}
public class BoolType : ParamType
{
private bool _boolTypeValue;
public bool BoolTypeValue
{
get { return _boolTypeValue; }
set { SetProperty(ref _boolTypeValue, value); }
}
}
public class NullableBoolType : ParamType
{
private bool? _nullableBoolTypeValue;
public bool? NullableBoolTypeValue
{
get { return _nullableBoolTypeValue; }
set { SetProperty(ref _nullableBoolTypeValue, value); }
}
}
public class ListMulti : ParamType
{
private ObservableCollection<Tuple<string, string>> _listMultiItems;
public ObservableCollection<Tuple<string, string>> ListMultiItems
{
get { return _listMultiItems; }
set { SetProperty(ref _listMultiItems, value); }
}
private ObservableCollection<Tuple<string, string>> _selectedListMulti;
public ObservableCollection<Tuple<string, string>> SelectedItemsListMulti
{
get { return _selectedListMulti ?? (_selectedListMulti = new ObservableCollection<Tuple<string,string>>()); }
set {
SetProperty(ref _selectedListMulti, value); }
}
}
public class ListSingle : ParamType
{
private ObservableCollection<Tuple<string, string>> _listSingleItems;
public ObservableCollection<Tuple<string, string>> ListSingleItems
{
get { return _listSingleItems; }
set { SetProperty(ref _listSingleItems, value); }
}
//private ObservableCollection<Tuple<string, string>> _listSingleItems;
//public ObservableCollection<Tuple<string, string>> ListSingleItems
//{
// get { return _listSingleItems; }
// set { SetProperty(ref _listSingleItems, value); }
//}
}
public class StringMulti : ParamType
{
private string _listMultiCollection;
public string ListMultiCollection
{
get { return _listMultiCollection; }
set { SetProperty(ref _listMultiCollection, value); }
}
}
public enum ParamTypeEnum
{
boolType,
nullableboolType,
intType,
floatType,
stringType,
datetimeType,
listmultiType,
stringlistmultiType,
};
