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.
Then we select the “Validate” tab to see the validation options: The default is that the field will not get validated.The illustration validates an XML document that the user chooses, either or catelog1against the XML Schema document You need one schema and two XML files to validate against the schema.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.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.
It assigns a new Xml Schema Set object to variable schemas, and calls this object's Add method to add a schema to the collection.
In that case, the previous value of the field is restored, and the user has to enter the data again.
This is not always desired (for more complicated data, it will probably be much easier to take a look, correct that one typo and continue with the rest of the form), so my preference is actually to mark the field so that the user knows which field needs to be corrected, and have the validation script not report a validation error back to the field: Using this method has implications on the form submission process: The form no longer can verify that the data is correct, so the submission function needs to do another round of validation to see if any of the required fields are not correct (one way to do that is to test all relevant fields to see if the text color is using the error color, or we can use global variables to store the validation state).
For numeric fields, there is a convenient way to validate a value range, but we want to select to run a custom validation script.
After the “Edit” button is clicked, a new window will open that allows us to edit the new script: This script also includes a check for an empty string, so that the user can wipe out a wrong string and start from scratch.
To use them as integers you will need to convert the user input into an integer using the int() function. This line of code would work fine as long as the user enters an integer.