Start Xmlreader to construct xmlvalidatingreader

Xmlreader to construct xmlvalidatingreader

For example, there are validating and non-validating Xml Reader implementations in the . So if you need three different constructors, you can instead create static factory methods which have names relevant to their use.

A pull model typically requires the entire XML document to be loaded, and a push model allows for forward-only reading of a document.

In MSXML, the push model is implemented by using the SAX interfaces, and the pull model is implemented by using the DOM interfaces.

Listing 6.1 shows the code that is used to build the XML document as a string in memory, load the document into an property.

Resetting the stream's internal pointer to the beginning of the stream is important. The last line of highlighted text shows that we created the , you can work with external resources and resolve only those resources that you want to retrieve remotely.

To do this, use this code: Private Sub getdata() Dim resolver As Xml Url Resolver = New Xml Url Resolver() Dim base URI As Uri = New Uri(" Dim relative URI As Uri = resolver. Stream)) Dim reader As Xml Text Reader = New Xml Text Reader(input Stream) Do While reader. Traditional means for solving this problem included developing a service to run as a specific user for the request, or calling Win32 APIs to log into a resource with specific credentials. Read Outer Xml()) Loop On Error Resume Next input Stream. Close() End Sub function advances the pointer and returns if the method call was successful.

Resolve Uri(base URI, "Customer.xsd") Dim input Stream As IO. The designers of the Dim relative URI As Uri = resolver. Stream)) Dim reader As Xml Text Reader = New Xml Text Reader(input Stream) Do While reader. If the call was successful, another node must be processed . This can be counter-intuitive to developers who are used to checking for an reference to another function.

Resolve Uri(base URI, "Customer.xsd") Dim input Stream As IO. The bug causes the pointer to be set back on the first attribute. Message); is Valid = False End Sub End Class Note the lack of error handling in this example. NET versions make the assumption that both the XML and XSD files already exist.

For example, the following code causes an endless loop because the pointer is always positioned on the first attribute and never advances: member implicitly checks what type of validation to perform. You might want to extend this example to include a . It simply writes out each node in a forward-only, non-cached manner.

Because the code differs significantly in Visual Basic and C#, both language implementations are shown. That basis is realized through the To make this type of structure navigable, everything contained in the structure must share a common interface or be inherited from the same base class.

The base class that all the components of an XML document in .

Sometimes they exist as a form of self-documentation.