ValidationService Class

A class that facilitates value validation using IValidator implementations.

Inheritance Hierarchy

SystemObject
GSF.ValidationValidationService

Namespace: GSF.Validation
Assembly: GSF.Core (in GSF.Core.dll) Version: 2.4.283-beta+c965646d479a9eab83d024dda466bc5a7b4c1300

Syntax

C++

JavaScript

Copy

public class ValidationService

Public Class ValidationService

public ref class ValidationService

type ValidationService = class end

GSF.Validation.ValidationService = function();

Type.createClass(
	'GSF.Validation.ValidationService');

View Source

The ValidationService type exposes the following members.

Constructors

	Name	Description
	ValidationService	Initializes a new instance of the ValidationService class.

Top

Methods

	Name	Description
	AddValidation	Adds a new validation.
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object)
	GetHashCode	Serves as the default hash function. (Inherited from Object)
	GetType	Gets the Type of the current instance. (Inherited from Object)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object)
	ToString	Returns a string that represents the current object. (Inherited from Object)
	Validate	Executes all validations.

Top

Extension Methods

	Name	Description
	GetEnumValueOrDefault	Gets the enumeration constant for value, if defined in the enumeration, or a default value. (Defined by EnumExtensions)
	GetEnumValueOrDefaultT	Gets the enumeration constant for this value, if defined in the enumeration, or a default value. (Defined by EnumExtensions)

Top

Example

This example shows how to use ValidationService for input validation:


            using System;
            using System.Collections.Generic;
            using GSF.Validation;
            
            class Program
            {
                static void Main(string[] args)
                {
                    // Dictionary where captured user input is saved.
                    Dictionary<string, string> input = new Dictionary<string, string>();
            
                    // Validation service that will validate user input.
                    ValidationService validation = new ValidationService(delegate(string source)
                        {
                            string value;
                            if (input.TryGetValue(source, out value))
                                return input[source];
                            else
                                return string.Empty;
                        });
            
                    // Add validation rules to the validation service.
                    validation.AddValidation("Name", new NonNullStringValidator());
                    validation.AddValidation("Email", new EmailAddressValidator());
            
                    // Capture user input.
                    Console.Write("Enter name: ");
                    input["Name"] = Console.ReadLine();
                    Console.Write("Enter email: ");
                    input["Email"] = Console.ReadLine();
                    Console.WriteLine("");
                
                    // Validate user input.
                    string errors;
                    if (!validation.Validate(out errors))
                        Console.WriteLine(errors);
                    else
                        Console.WriteLine("No validation errors were found!");
            
                    Console.ReadLine();
                }
            }

Reference

GSF.Validation Namespace

IValidator