Validating xml schema in net



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XML Schema (XSD) Validation with XmlSchemaSet




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XML Schema Documents usually have the filename extension ". Schema components[ edit ] The main components of a schema are: Element declarations, which define properties of elements. These include the element name and target namespace. An important property is the type of the element, which constrains what attributes and children the element can have. An element may belong to a substitution group; if element E is in the substitution group of element H, then wherever the schema permits H to appear, E may appear in its place. Elements may have integrity constraints: Element declarations may be global or local, allowing the same name to be used for unrelated elements in different parts of an instance document.

Attribute declarations, which define properties of attributes. Again the properties include the attribute name and target namespace. The attribute type constrains the values that the attribute may take. An attribute declaration may also include a default value or a fixed value which is then the only value the attribute may take. Simple and complex types. These are described in the following section. Model group and attribute group definitions. These are essentially macros: An attribute use represents the relationship of a complex type and an attribute declaration, and indicates whether the attribute is mandatory or optional when it is used in that type.

An element particle similarly represents the relationship of a complex type and an element declaration, and indicates the minimum and maximum number of times the element may appear in the content. As well as element particles, content models can include model group particles, which act like non-terminals in a grammar: In addition, wildcard particles are allowed, which permit a set of different elements perhaps any element provided it is in a certain namespace. Other more specialized components include annotations, assertions, notations, and the schema component which contains information about the schema as a whole.

Types[ edit ] Simple types also called data types constrain the textual values that may appear in an element or attribute. Here is an example: Read End While 'Close the reader. As mentioned before, this function has a callback to the same on validation event as the XML validation function did. Here is the code: Not really a lot to it.

I am sure many xmp you already knew how to do this. I kind of wish you had published an article, it would have saved me some time. Since we wish to validate the incoming XML documents against Employees. The Schemas property is actually XmlSchemaSet collection. The ValidationEventHandler event is raised during the validation process whenever there is any validation error. The OnValidationError method is discussed later. Then an XmlReader object is created. Notice the two parameter of the XmlReader constructor. The first parameter is the InputStream of the incoming file.

Net in Validating schema xml

Since the file is not yet "accepted" by the system it's not physically saved onto the server. Hence, we pass the file's InputStream. The second parameter is the XmlReaderSettings object. A while loop runs the XmlReader's Read method.

The Read method returns false when the XmlReader reaches the end of the stream. Once the validation is over the code closes the XmlReader by calling its Close method. If the OnValidationError has set the flag variable to true, it indicates that the current file has validation errors. If so, we add a failure message in the List. If the flag is false it means there were no validation errors. We also add a success message in the messages List. Once the current file is over we reset the flag variable to false.

Finally, the Index view is displayed back to the user. This time messages List is passed to the Index view as its model. The Message property of ValidationEventArgs tells us what went wrong during the validation. We add this message and the currentFileName to the messages List. This completes the example. Run it and pick both the files - Employees1.

If a hospital is found to be checked the it shouldn't be measured in the system for detailed tutorial. Here is an archbishopric:.

You should see success and error messages as shown in the figure earlier. That's it for now! He conducts instructor-led online training courses in ASP. He is a published author and has authored or co-authored books for Apress and Wrox press.


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