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The illustration validates an XML document that the user chooses, either or catelog1against the XML Schema document
When you play around with the function, you’ll notice that the validation function is only called when the focus leaves the field, so you have to click outside of the field to actually make that error message pop up.Let’s take a look at how to do that with a text field that is only supposed to have a value of either ‘AAAA’ or ‘BBBB’ (yes, I know that this does not make much sense in a real PDF form).So, if the user enters ‘01234’ we should see an error message that would instruct the user about what type of data is valid for this field.Create an Xml Reader that reads the file selected by the user from the txtfilename Text Box and validates it against the schema by calling the read method inside a whileloop. Whole numbers (numbers with no decimal place) are called integers.The Add method receives as arguments a namespace URI that identifies the schema ( and the name and location of the schema file (in the current directory).
Create and set the properties of an Xml Reader Settings object. It can validate an XML document as it reads and parses the document.In this example, we demonstrate how to activate such validation.Again set the Xml Reader Settings object's Schemas property to schemas.This property sets the schema(s) used to validate the document read by the Xml Reader.Set the Xml Reader Settings object's Validation Type property to the value Validation Type.