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XML deserialization - selection of custom errors

So, I have the following method:

private int? myIntField
[System.Xml.Serialization.XmlElementAttribute(Form = System.Xml.Schema.XmlSchemaForm.Unqualified)]
public int? IntField{
    get {
        return this.myIntField;
    }
    set {
        this.myIntField= value;
    }
 }

Now, I am deserializing the xml from the message, if for some reason I get a line, for example "here is the int field: 55444" instead of 55444, the error I get in response is: Input string was not in a correct format.which is not very specific, especially considering that I will have more than one int field that I need to check.

I originally planned something like this:

private string myIntField
[System.Xml.Serialization.XmlElementAttribute(Form = System.Xml.Schema.XmlSchemaForm.Unqualified)]
public int? IntField{
    get {
        return this.myIntField.CheckValue();
    }
    set {
        this.myIntField= value;
    }
 }

Where CheckValue runs try-parsein Int32, and if it fails, it returns null and adds the error to the list. However, I cannot cover this setting for the generated classes.

Is there a way to input a specific error if I get strings instead of int, DateTimes, etc.?

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3

" " System.FormatException, int.Parse, , . , - .

- - :

    [XmlElement("IntField")]
    [Browsable(false)] // not displayed in grids
    [EditorBrowsable(EditorBrowsableState.Never)] // not displayed by intellisense
    public string IntFieldString
    {
        get
        {
            return DoSomeConvert(IntField);
        }
        set
        {
            IntField = DoSomeOtherConvert(value);
        }
    }

    [XmlIgnore]
    public int? IntField { get; set; }

, IntFieldString, , , "real" IntField , XmlSerializer (XmlIgnore), , , (EditorBrowsable), (Browsable) .., XmlSerializer.

+3

, XML . , XML, XmlSchemaSet, :

var document = new XmlDocument();
document.LoadXml(xml); // this a string holding the XML
document.Schemas.XmlResolver = null; //if you don't need to resolve every references
document.Schemas.Add(SchemaSet); // System.Xml.Schema.XmlSchemaSet instance filled with schemas
document.Validate((sender, args) => { ... }); //args are of type ValidationEventArgs and hold problem if there is one...

, , XML , XML , , , , - , ...
, XML

+4

.

  • , , . , , .

  • , . LINQ Pad

    void Main()
{
    using(var stream = new StringReader(
              "<Items><Item><IntValue>1</IntValue></Item></Items>"))
    {
        var serializer = new XmlSerializer(typeof(Container));

        var items = (Container)serializer.Deserialize(stream);

        items.Dump();
    }
}

[XmlRoot("Items")]
public class Container
{
    [XmlElement("Item")]
    public List<Item> Items { get; set; }
}

public class Item
{
    [XmlElement("IntValue")]
    public string _IntValue{get;set;}

    [XmlIgnore]
    public int IntValue
    {
        get
        {
            // TODO: check and throw appropriate exception
            return Int32.Parse(_IntValue);
        }
    }
}

  • IXmlSerializable,

    void Main()
{
    using(var stream = new StringReader(
              "<Items><Item><IntValue>1</IntValue></Item></Items>"))
    {
        var serializer = new XmlSerializer(typeof(Container));

        var items = (Container)serializer.Deserialize(stream);

        items.Dump();
    }
}

[XmlRoot("Items")]
public class Container
{
    [XmlElement("Item")]
    public List<Item> Items { get; set; }
}

public class Item : IXmlSerializable
{
    public int IntValue{get;set;}

    public void WriteXml (XmlWriter writer)
    {
        writer.WriteElementString("IntValue", IntValue.ToString());
    }

    public void ReadXml (XmlReader reader)
    {
        var v = reader.ReadElementString();
        // TODO: check and throw appropriate exception
        IntValue = int.Parse(v);
    }

    public XmlSchema GetSchema()
    {
        return(null);
    }
}
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