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This property sets the schema(s) used to validate the document read by the Xml Reader.
Register the method Validation Error with the settings object's Validation Event Handler.
Many times in Dynamics 365 related applications we need to work with dynamically generated or user entered fetch Xml, In this case it’s always a good idea to verify fetc Xml against schema before using. In above code first of all we are reading fetxh Xml schema using Xml Reader, then Initiating Xml Reader Settings object with schema.
This kind of requirement might come if you are building some awesome stuff like Fetch XML Builder or Fetch XML to SQL Converter. Let’s get started, here I’m using a console application. We need Fetch Xml schema which can be grabbed from SDK or can be found at the end of this article. This is passed as second parameter while reading fetch Xml with Xml Reader.
Add this file with name to your project and set Copy to Output Directory property as Copy Always. Add below listed namespaces to project using System. It validates fetch Xml while we call Load() of Xml Document, you can see in code. Let’s test some fetch Xml with above written function.
and second is Message which will have error message if fetch Xml is not valid.
Schema, indicating that we want the Xml Reader to perform validation with a schema as it reads an XML document.
When the program encounters the invalid node, the method Validation Error is called that displays a message explaining why validation failed. An object of the class Xml Schema Set stores a collection of schemas that an Xml Reader can be validated against.In this example, we demonstrate how to activate such validation.The illustration validates an XML document that the user chooses, either or catelog1against the XML Schema document XML documents can be validated against an XML schema definition language (XSD) schema in an Xml Schema Set.
XML documents are validated by the Create method of the Xml Reader class. Schema namespace contains extension methods that make it easy to validate an XML tree against an XSD file when using LINQ to XML (C#) and LINQ to XML (Visual Basic). It contains a reference to an XSD file, which you will also need to copy from below or download and enter into the webpage (in a second step, when you are prompted for it) to see the validation results.