What language do you use? Below is the sample code in C++:
Validating an XML Document Against an XML Schema Using C++
To validate an XML document file with an XML Schema definition language (XSD) schema file using C++, you load XML and XSD documents and create a schema cache as in the following example.
#include "stdio.h"
#import <msxml4.dll>
using namespace MSXML2;
int checkParseError (IXMLDOMParseEr rorPtr pError);
void dump_com_error( _com_error &e);
int main(int argc, char* argv[])
{
CoInitialize(NU LL);
try{
IXMLDOMParseErr orPtr pError;
// load the XML file
// ****** you need to use IXMLDOMDocument 2 interface *********
IXMLDOMDocument 2Ptr pXMLDoc;
HRESULT hr = pXMLDoc.CreateI nstance(__uuido f(DOMDocument40 ));
pXMLDoc->async = VARIANT_FALSE;
hr = pXMLDoc->load("books.xm l");
//check on the parser error
if(hr!=VARIANT_ TRUE)
{
return checkParseError (pXMLDoc->parseError);
}
//load the XSD file
IXMLDOMDocument Ptr pXSDDoc;
hr = pXSDDoc.CreateI nstance(__uuido f(DOMDocument40 ));
pXSDDoc->async = VARIANT_FALSE;
hr = pXSDDoc->load("books.xs d");
//check on the parser error
if(hr!=VARIANT_ TRUE)
{
return checkParseError (pXSDDoc->parseError);
}
//create schemacache
IXMLDOMSchemaCo llectionPtr pSchemaCache;
hr = pSchemaCache.Cr eateInstance(__ uuidof(XMLSchem aCache40));
pXMLDoc->schemas = pSchemaCache.Ge tInterfacePtr() ;
//hook it up with XML Document
hr = pSchemaCache->add("urn:books ", pXSDDoc.GetInte rfacePtr());
//call validate
pError = pXMLDoc->validate();
if(pError->errorCode != S_OK)
{
_bstr_t parseError = _bstr_t("Error code: ")+ _bstr_t(pError->errorCode) +_bstr_t("\n") + _bstr_t("Reason : ")+ pError->Getreason();
MessageBox(NULL , (char*)parseErr or, "Parse Error",MB_OK);
return -1;
}
else
MessageBox(NULL ,"Valiation succeeded", "Results",MB_OK );
}
catch(_com_erro r &e)
{
dump_com_error( e);
}
return 0;
}
int checkParseError (IXMLDOMParseEr rorPtr pError)
{
_bstr_t parseError =_bstr_t("At line ")+ _bstr_t(pError->Getline()) + _bstr_t("\n")+ _bstr_t(pError->Getreason()) ;
MessageBox(NULL ,parseError, "Parse Error",MB_OK);
return -1;
}
void dump_com_error( _com_error &e)
{
printf("Error\n ");
printf("\a\tCod e = %08lx\n", e.Error());
printf("\a\tCod e meaning = %s", e.ErrorMessage( ));
_bstr_t bstrSource(e.So urce());
_bstr_t bstrDescription (e.Description( ));
printf("\a\tSou rce = %s\n", (LPCSTR) bstrSource);
printf("\a\tDes cription = %s\n", (LPCSTR) bstrDescription );
}Input file: books.xml
<?xml version="1.0"?>
<x:catalog xmlns:x="urn:bo oks">
<book id="bk101">
<author>Gambard ella, Matthew</author>
<title>XML Developer's Guide</title>
<genre>Computer </genre>
<price>44.95</price>
<publish_date>2 000-10-01</publish_date>
<description> An in-depth look at creating applications with XML.</description>
</book>
</x:catalog>
Input file: books.xsd
<xsd:schema xmlns:xsd="http ://www.w3.org/2001/XMLSchema" targetNamespace ="urn:books" xmlns:b="urn:bo oks">
<xsd:element name="catalog" type="b:Catalog Data"/>
<xsd:complexTyp e name="CatalogDa ta">
<xsd:sequence >
<xsd:element name="book" type="b:bookdat a" minOccurs="0" maxOccurs="unbo unded"/>
</xsd:sequence>
</xsd:complexType >
<xsd:complexTyp e name="bookdata" >
<xsd:sequence >
<xsd:element name="author" type="xsd:strin g"/>
<xsd:element name="title" type="xsd:strin g"/>
<xsd:element name="genre" type="xsd:strin g"/>
<xsd:element name="price" type="xsd:float "/>
<xsd:element name="publish_d ate" type="xsd:date"/>
<xsd:element name="descripti on" type="xsd:strin g"/>
</xsd:sequence>
<xsd:attribut e name="id" type="xsd:strin g"/>
</xsd:complexType >
</xsd:schema>"Sha ilendra Batham" <sh********@sit esystems.com> wrote in message news:OA******** ******@TK2MSFTN GP11.phx.gbl...
hi guys
I need your suggestions / opinion for doing this the right way.
I have a XML and a Schema for the same
What I want is when its validated against the schema, it should give custom errors saying what happened and where......
is it possible to do that ?
for eg. if the Attribute is missing or invalid in the following element <Watch ID="999d999">
then it should say ID attribute invalid for "Watch" Element.
Right now the validation works but the error returning our very vague, I need a way where I can customize the error or at least let the user know where the error is at what element and which attribute.
thanks,
Shailendra Batham
