Validation of xml document at load time.

[Emily John]

I am using xml serialization to generate my xml document. I am getting
the data as stream of memory and then converting it to xml document
object without saving it to the file system.

How do I validate this memory stream of data at load time with xml
schema ?

I may have to validate with multiple schemas at a later time.

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[Nigel Armstrong]

Hi Emily

You need a layered approach here. Use the XmlTextReader on your stream, then
construct a ValidatingXmlReader using the TextReader, and then pass the
validating reader through to the Load method of your XmlDocument.

Code like this:

Dim t As New Xml.XmlTextReader(stream)
Dim v As New Xml.XmlValidatingReader(t)
Dim doc As New Xml.XmlDocument
doc.Load(v)

HTH

Nigel

"Emily John" wrote:

I am using xml serialization to generate my xml document. I am getting
the data as stream of memory and then converting it to xml document
object without saving it to the file system.

How do I validate this memory stream of data at load time with xml
schema ?

I may have to validate with multiple schemas at a later time.

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[Emily John]

Exactly ! I did the same thing. But where does I make a call to validate
it against schema ?

Does XMLValidatingReader does the validation automatically ? Which
schema it validates against ?? I need to clearly understannd the
doc.Load(v) call adn how is validates.

Can you please help ??

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[Nigel Armstrong]

Hi Emily

Take a look at the ValidationType and Schemas properties.

With ValidationType set to Auto, then if you can use the xsi:schemaLocation
/ xsi:noNamespaceSchemaLocation to hook into validation.

You can also add a Schema or collection of Schemas to validate against with
the Schemas property.

HTH

Nigel Armstrong

"Emily John" wrote:

Exactly ! I did the same thing. But where does I make a call to validate
it against schema ?

Does XMLValidatingReader does the validation automatically ? Which
schema it validates against ?? I need to clearly understannd the
doc.Load(v) call adn how is validates.

Can you please help ??

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