/// <summary>
/// Derived classes can call AddUserError() to add errors or warnings or else to the existing list
/// of parsing/validation errors.
/// The IsValid flag will be set to false if error severity is Error or Fatal.
/// </summary>
/// <param name="severity">Error severity</param>
/// <param name="message">Message</param>
/// <param name="line">Source line</param>
public void AddValidationMessage ( XmlParseErrorSeverity severity, string message, int line = 0 )
{
XmlParseError pe = new XmlParseError ( ) ;
pe. Step = XmlParseStep. UserValidation ;
pe. Severity = severity ;
pe. Message = message ;
pe. Line = line ;
pe. Column = 0 ;
pe. Source = "xml document" ;
pe. SourceUri = "xml document" ;
ValidationMessages. Add ( pe ) ;
SetValidState ( pe. Severity ) ;
}
/// <summary>
/// Builds and validates an Xml document.
/// </summary>
/// <param name="xml_data">Xml contents, specified as a string</param>
/// <param name="xsd_data">Xsd specifications, specified as a string</param>
public XmlValidatedDocument ( string xml_data,
string xsd_data = null ) : base ( )
{
// Initializations
IsValid = true ; // Consider that by default the document is valid until some crap is found
ValidationMessages = new XmlParseErrors ( ) ;
XmlData = xml_data ; // Remember supplied parameters
XsdData = xsd_data ;
// Step 1 : load xml data
try
{
LoadXml ( xml_data ) ;
}
// Catch parsing errors such as opening/closing tag mismatch, or attribute with no value
catch ( XmlException e )
{
XmlParseError pe = new XmlParseError ( ) ;
IsValid = false ;
pe. Step = XmlParseStep. XmlParsing ;
pe. Severity = XmlParseErrorSeverity. Error ;
pe. Message = e. Message ;
pe. Line = e. LineNumber ;
pe. Column = e. LinePosition ;
pe. Source = e. Source ;
pe. SourceUri = e. SourceUri ;
ValidationMessages. Add ( pe ) ;
}
// Stop here if step 1 failed : validation cannot be performed on syntactically incorrect xml data
if ( ! IsValid )
return ;
// Perform steps 2 (Xsd validation) and 3 (Xml validation using Xsd) only if xsd data has been specified
if ( xsd_data != null )
{
// Step 2 : Validate the xsd itself before using it for validating the xml...
XmlSchema schema = XmlSchema. Read
(
new StringReader ( xsd_data ),
( object sender, ValidationEventArgs e ) =>
{
XmlParseError pe = new XmlParseError ( ) ;
pe. Step = XmlParseStep. XsdValidation ;
pe. Severity = ( XmlParseErrorSeverity ) e. Severity ;
pe. Message = e. Message ;
pe. Line = e. Exception. LineNumber ;
pe. Column = e. Exception. LinePosition ;
pe. Source = e. Exception. Source ;
pe. SourceUri = e. Exception. SourceUri ;
ValidationMessages. Add ( pe ) ;
SetValidState ( pe. Severity ) ;
}
) ;
// Stop here if xsd contain errors : we will not be able to use it for xml validation anyway
if ( ! IsValid )
return ;
// Step 3 : validate the xml document using the xsd schema
Schemas. Add ( schema ) ;
Validate
(
( object sender, ValidationEventArgs e ) =>
{
XmlParseError pe = new XmlParseError ( ) ;
pe. Step = XmlParseStep. XmlValidation ;
pe. Severity = XmlParseErrorSeverity. Error ;
pe. Message = e. Message ;
pe. Line = e. Exception. LineNumber ;
pe. Column = e. Exception. LinePosition ;
pe. Source = e. Exception. Source ;
pe. SourceUri = e. Exception. SourceUri ;
ValidationMessages. Add ( pe ) ;
SetValidState ( pe. Severity ) ;
}
) ;
// Stop here if validation failed ; there is no need to perform user processing at that stage
if ( ! IsValid )
return ;
}
// Step 4 : everything went smooth (perhaps we had some informational or warning messages), so
// we can perform user processing.
ValidateStructure ( ) ;
}
