ToValidation() extension

Import the namespace using Mad.Validation; and you can call .ToValidation() on all types of objects and variables. You can then start chaining validation rules like

    email.ToValidation()
        .Required()
        .MustContain("@");

To run the validation and to get a result, you call the .ToResult()

ValidationList

Most of the time you are validating multiple variables. For this you can use the ValidationList class. Example:

    new ValidatioList()
        .Add(account.Id.ToValidation().Required())
        .Add(account.Username.ToValidation().Required())
        .Add(account.Password.ToValidation().Required()).ToResult();

Null

By default null is not valid. If you want your validation rule to accept null then you have to add an acception like this firstName.ToValidation().AcceptNull(). You also have some extra accpetions for strings, .AcceptEmpty() and .AcceptEmptyOrWhitespace().

Validation Rules

Lists of the different vaidation rules.

All Types

EqualTo	Value must be equal to a value.	.EqualTo(someValue)
NotEqualTo	Value must not be equal to a value.	.NotEqualTo(someValue)
OneOf	Is one of the items in a collection.	.OneOf(new [] { "val1", "val2", "val3" })
NotOneOf	Is not one of the items in a collection.	.NotOneOf(new [] { "val1", "val2", "val3" })
ExpressionMustBeTrue	Create a custom lambda expression that must be true.	.ExpressionMustBeTrue(v => v.Length == 5)
ExpressionMustBeFalse	Create a custom lambda expression that must be false.	.ExpressionMustBeFalse(v => v.Length == 5)

IComparable Types numbers, dates & etc

Min	The minimum allowed value.	.Min(10)
Max	The maximum allowed value.	.Max(100)
Between	A value is equal or between two values.	.Between(10, 100)
GreaterThan	A value greater than.	.GreaterThan(5)
LessThan	A value less than.	.LessThan(8)

ICollection Types

MustBeEmpty	Collection must be empty.	.MustBeEmpty()
CantBeEmpty	Collection can't be empty.	.CantBeEmpty()
MinCount	Minimum items in a collection.	.MinCount(10)
MaxCount	Maximimum items in a collection.	.MaxCount(100)
CountBetween	The number of items must be equal or between two values.	.CountBetween(10, 100)

Bool Types

MustBeTrue	Value must be true.	.MustBeTrue()
MustBeFalse	Value must be false.	.MustBeFalse()

String Types

Required	String is required and can't be empty or whitespace.	.Required()
NotEmpty	String cant be empty.	.NotEmpty()
NotEmptyOrWhitespace	String can't be empty or whitespace.	.NotEmptyOrWhitespace()
MinLength	Minimum length of a string.	.MinLength(10)
MaxLength	Maximum length of a string.	.MaxLength(100)
LengthBetween	Length must be equal or between two values.	.LengthBetween(10, 100)
MustContain	String must contain a specific value.	.MustContain("someString")
StartsWith	String must start with a specific value.	.StartsWith("someString")
EndsWith	String must end with a specific value.	.EndsWith("someString")
MatchesRegex	String must match a regex.	.MatchesRegex("^[a-zA-Z0-9_]*$")
DontMatchesRegex	String must not match a regex.	.DontMatchesRegex("^[a-zA-Z0-9_]*$")

Number Types

Required	Number is required, meaning it can't be zero(0).	.Required()