C# 中 Fluent Validation 的用途是什麼?如何使用 C#?
FluentValidation 是一個用於構建強型別驗證規則的 .NET 庫。它使用流暢介面和 lambda 表示式來構建驗證規則。它有助於清理你的域程式碼,使其更具內聚力,併為你提供一個查詢驗證邏輯的單一位置
要使用 Fluent Validation,我們必須安裝以下程式包
<PackageReference Include="FluentValidation" Version="9.2.2" />
示例 1
static class Program {
static void Main (string[] args) {
List errors = new List();
PersonModel person = new PersonModel();
person.FirstName = "";
person.LastName = "S";
person.AccountBalance = 100;
person.DateOfBirth = DateTime.Now.Date;
PersonValidator validator = new PersonValidator();
ValidationResult results = validator.Validate(person);
if (results.IsValid == false) {
foreach (ValidationFailure failure in results.Errors) {
errors.Add(failure.ErrorMessage);
}
}
foreach (var item in errors) {
Console.WriteLine(item);
}
Console.ReadLine ();
}
}
public class PersonModel {
public string FirstName { get; set; }
public string LastName { get; set; }
public decimal AccountBalance { get; set; }
public DateTime DateOfBirth { get; set; }
}
public class PersonValidator : AbstractValidator {
public PersonValidator(){
RuleFor(p => p.FirstName)
.Cascade(CascadeMode.StopOnFirstFailure)
.NotEmpty().WithMessage("{PropertyName} is Empty")
.Length(2, 50).WithMessage("Length ({TotalLength}) of {PropertyName} Invalid")
.Must(BeAValidName).WithMessage("{PropertyName} Contains Invalid Characters");
RuleFor(p => p.LastName)
.Cascade(CascadeMode.StopOnFirstFailure)
.NotEmpty().WithMessage("{PropertyName} is Empty")
.Length(2, 50).WithMessage("Length ({TotalLength}) of {PropertyName} Invalid")
.Must(BeAValidName).WithMessage("{PropertyName} Contains Invalid Characters");
}
protected bool BeAValidName(string name) {
name = name.Replace(" ", "");
name = name.Replace("-", "");
return name.All(Char.IsLetter);
}
}
輸出
First Name is Empty Length (1) of Last Name Invalid
廣告
資料結構
網路
RDBMS
作業系統
Java
iOS
HTML
CSS
Android
Python
C 程式設計
C++
C#
MongoDB
MySQL
Javascript
PHP