/// <summary>
/// Creates a field instance from his XML schema representation, taking the field structure from a schema and the constraints from another.
/// </summary>
/// <param name="schema">
/// A <see cref="XmlSchemaSet"/> which contains the whole form to render
/// </param>
/// <param name="elm">
/// A <see cref="XmlSchemaElement"/> which contains the definition of the field to instantiate
/// </param>
/// <returns>
/// A <see cref="Field"/> built following the schemas above
/// </returns>
public static IField GetInstance(XmlSchemaSet schema, XmlSchemaObject scobj)
{
if (scobj is XmlSchemaElement && !((XmlSchemaElement)scobj).SchemaTypeName.IsEmpty)
{
XmlSchemaElement elm = (XmlSchemaElement)scobj;
try
{
foreach (XmlSchema xsd in schema.Schemas())
{
string searchname = elm.SchemaTypeName.ToString();
//controlla se nello schema è presente l'elemento cercato
if (xsd.SchemaTypes.Contains(new XmlQualifiedName(searchname)))
{
foreach (XmlSchemaObject obj in xsd.Items)
{
if (obj is XmlSchemaComplexType && ((XmlSchemaComplexType)obj).Name.ToString() == searchname)
{
XmlSchema fieldschema = new XmlSchema();
fieldschema.Items.Add(obj);
XmlSchemaComplexContent xcc = (XmlSchemaComplexContent)((XmlSchemaComplexType)obj).ContentModel;
XmlSchemaComplexContentExtension xext = (XmlSchemaComplexContentExtension)xcc.Content;
Type tipo = Type.GetType("Fields." + xext.BaseTypeName.ToString(), true);
Type[] par = { fieldschema.GetType(), typeof(string) };
//elm.Name prende il nome dell'elemento contenuto in elm
Object[] vals = { fieldschema, elm.Name };
return((IField)tipo.GetConstructor(par).Invoke(vals));
}
}
}
}
}
catch (Exception)
{
return(null);
}
return(null);
}
return(null);
}
