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 3 1920
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
Hi Shailendra,
If you are coding in .Net,
Look at these:
System.Xml.Sche ma
ValidationEvent Handler
ValidationEvent Args
XmlTextReader xmlreader = new XmlTextReader(" test.xml");
XmlValidatingRe ader valid = new XmlValidatingRe ader(xmlreader) ;
valid.Validatio nType = ValidationType. Schema;
Cheers.
"Shailendra Batham" wrote: 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
Thanks for the reply guys.
hey chua I am using C# and I am using the ValidationEvent Handler, it works
fine but this is what error it returns
"The 'ID' attribute has an invalid value according to its data type. An
error occurred at , (2, 9)." string
can we do custom errors like what node's attribute had an error.
"Chua Wen Ching" <ch************ @nospam.hotmail .com> wrote in message
news:FA******** *************** ***********@mic rosoft.com... Hi Shailendra,
If you are coding in .Net,
Look at these:
System.Xml.Sche ma
ValidationEvent Handler ValidationEvent Args
XmlTextReader xmlreader = new XmlTextReader(" test.xml"); XmlValidatingRe ader valid = new XmlValidatingRe ader(xmlreader) ; valid.Validatio nType = ValidationType. Schema;
Cheers.
"Shailendra Batham" wrote:
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 This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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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">
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