1+ using FluentValidation ;
2+ using FormCraft . DemoBlazorApp . Components . Shared ;
3+ using FormCraft . DemoBlazorApp . Models ;
4+ using Microsoft . AspNetCore . Components ;
5+ using MudBlazor ;
6+
7+ namespace FormCraft . DemoBlazorApp . Components . Pages ;
8+
9+ public partial class FluentValidationDemo : ComponentBase
10+ {
11+ private CustomerModel _model = new ( ) ;
12+ private IFormConfiguration < CustomerModel > ? _formConfig ;
13+ private bool _submitted ;
14+ private bool _isSubmitting ;
15+ private int _validationAttempts ;
16+ private int _successfulValidations ;
17+
18+ private readonly List < FormGuidelines . GuidelineItem > _sidebarFeatures =
19+ [
20+ new ( )
21+ {
22+ Icon = Icons . Material . Filled . Merge ,
23+ Color = Color . Primary ,
24+ Text = "Seamless integration with existing validators"
25+ } ,
26+
27+ new ( )
28+ {
29+ Icon = Icons . Material . Filled . Rule ,
30+ Color = Color . Secondary ,
31+ Text = "Support for complex validation rules"
32+ } ,
33+
34+ new ( )
35+ {
36+ Icon = Icons . Material . Filled . CloudSync ,
37+ Color = Color . Tertiary ,
38+ Text = "Async validation support"
39+ } ,
40+
41+ new ( )
42+ {
43+ Icon = Icons . Material . Filled . AccountTree ,
44+ Color = Color . Info ,
45+ Text = "Nested object validation"
46+ } ,
47+
48+ new ( )
49+ {
50+ Icon = Icons . Material . Filled . Message ,
51+ Color = Color . Success ,
52+ Text = "Custom error messages"
53+ } ,
54+
55+ new ( )
56+ {
57+ Icon = Icons . Material . Filled . FilterAlt ,
58+ Color = Color . Warning ,
59+ Text = "Conditional validation logic"
60+ }
61+ ] ;
62+
63+ private readonly List < GuidelineItem > _apiGuidelineTableItems =
64+ [
65+ new ( )
66+ {
67+ Feature = "WithFluentValidation()" ,
68+ Usage = "Uses validator registered in DI" ,
69+ Example = "field.WithFluentValidation(x => x.Email)"
70+ } ,
71+
72+ new ( )
73+ {
74+ Feature = "WithFluentValidator()" ,
75+ Usage = "Uses specific validator instance" ,
76+ Example = "field.WithFluentValidator(validator, x => x.Name)"
77+ } ,
78+
79+ new ( )
80+ {
81+ Feature = "Register Validators" ,
82+ Usage = "Add to dependency injection" ,
83+ Example = "services.AddScoped<IValidator<Model>, ModelValidator>()"
84+ } ,
85+
86+ new ( )
87+ {
88+ Feature = "Combine Validators" ,
89+ Usage = "Mix with FormCraft validators" ,
90+ Example = "field.Required().WithFluentValidation(x => x.Name)"
91+ } ,
92+
93+ new ( )
94+ {
95+ Feature = "Nested Validation" ,
96+ Usage = "Supports SetValidator rules" ,
97+ Example = "RuleFor(x => x.Address).SetValidator(new AddressValidator())"
98+ } ,
99+
100+ new ( )
101+ {
102+ Feature = "Async Rules" ,
103+ Usage = "Supports MustAsync" ,
104+ Example = "RuleFor(x => x.Email).MustAsync(async (email, ct) => ...)"
105+ }
106+ ] ;
107+
108+ protected override void OnInitialized ( )
109+ {
110+ // Create form configuration using FluentValidation
111+ _formConfig = FormBuilder < CustomerModel >
112+ . Create ( )
113+ . AddField ( x => x . Name , field => field
114+ . WithLabel ( "Customer Name" )
115+ . WithPlaceholder ( "Enter your full name" )
116+ . WithFluentValidation ( x => x . Name )
117+ . WithHelpText ( "Name must be between 3 and 50 characters" ) )
118+ . AddField ( x => x . Email , field => field
119+ . WithLabel ( "Email Address" )
120+ . WithPlaceholder ( "your.email@example.com" )
121+ . WithFluentValidation ( x => x . Email )
122+ . WithHelpText ( "We'll never share your email with anyone" ) )
123+ . AddField ( x => x . Age , field => field
124+ . WithLabel ( "Age" )
125+ . WithPlaceholder ( "18" )
126+ . WithFluentValidation ( x => x . Age )
127+ . WithHelpText ( "Must be 18 or older" ) )
128+ . Build ( ) ;
129+ }
130+
131+ private async Task HandleValidSubmit ( CustomerModel model )
132+ {
133+ _isSubmitting = true ;
134+ _validationAttempts ++ ;
135+ StateHasChanged ( ) ;
136+
137+ // Simulate async operation
138+ await Task . Delay ( 1500 ) ;
139+
140+ _submitted = true ;
141+ _successfulValidations ++ ;
142+ _isSubmitting = false ;
143+ StateHasChanged ( ) ;
144+ }
145+
146+ private Task HandleFieldChanged ( ( string fieldName , object ? value ) args )
147+ {
148+ // Track field changes if needed
149+ return Task . CompletedTask ;
150+ }
151+
152+ private void ResetForm ( )
153+ {
154+ _model = new CustomerModel ( ) ;
155+ _submitted = false ;
156+ StateHasChanged ( ) ;
157+ }
158+
159+ private List < FormSuccessDisplay . DataDisplayItem > GetDataDisplayItems ( )
160+ {
161+ return new List < FormSuccessDisplay . DataDisplayItem >
162+ {
163+ new ( ) { Label = "Customer Name" , Value = _model . Name } ,
164+ new ( ) { Label = "Email Address" , Value = _model . Email } ,
165+ new ( ) { Label = "Age" , Value = _model . Age . ToString ( ) } ,
166+ new ( ) { Label = "Validation Type" , Value = "FluentValidation" } ,
167+ new ( ) { Label = "Validator Class" , Value = "CustomerValidator" }
168+ } ;
169+ }
170+
171+ private string GetCodeExample ( )
172+ {
173+ return @"// 1. Define your FluentValidation validator
174+ public class CustomerValidator : AbstractValidator<Customer>
175+ {
176+ public CustomerValidator()
177+ {
178+ RuleFor(x => x.Name)
179+ .NotEmpty().WithMessage(""Name is required"")
180+ .MinimumLength(3).WithMessage(""Name must be at least 3 characters"")
181+ .MaximumLength(50).WithMessage(""Name cannot exceed 50 characters"");
182+
183+ RuleFor(x => x.Email)
184+ .NotEmpty().WithMessage(""Email is required"")
185+ .EmailAddress().WithMessage(""Invalid email format"");
186+
187+ RuleFor(x => x.Age)
188+ .GreaterThanOrEqualTo(18).WithMessage(""Must be 18 or older"");
189+ }
190+ }
191+
192+ // 2. Register the validator in DI
193+ services.AddScoped<IValidator<Customer>, CustomerValidator>();
194+
195+ // 3. Use in FormCraft
196+ var formConfig = FormBuilder<Customer>
197+ .Create()
198+ .AddField(x => x.Name, field => field
199+ .WithLabel(""Customer Name"")
200+ .WithFluentValidation(x => x.Name))
201+ .AddField(x => x.Email, field => field
202+ .WithLabel(""Email Address"")
203+ .WithFluentValidation(x => x.Email))
204+ .Build();" ;
205+ }
206+
207+ // Model class
208+ public class CustomerModel
209+ {
210+ public string Name { get ; set ; } = "" ;
211+ public string Email { get ; set ; } = "" ;
212+ public int Age { get ; set ; }
213+ }
214+
215+ // FluentValidation validator
216+ public class CustomerValidator : AbstractValidator < CustomerModel >
217+ {
218+ public CustomerValidator ( )
219+ {
220+ RuleFor ( x => x . Name )
221+ . NotEmpty ( ) . WithMessage ( "Name is required" )
222+ . MinimumLength ( 3 ) . WithMessage ( "Name must be at least 3 characters" )
223+ . MaximumLength ( 50 ) . WithMessage ( "Name cannot exceed 50 characters" ) ;
224+
225+ RuleFor ( x => x . Email )
226+ . NotEmpty ( ) . WithMessage ( "Email is required" )
227+ . EmailAddress ( ) . WithMessage ( "Please enter a valid email address" ) ;
228+
229+ RuleFor ( x => x . Age )
230+ . GreaterThanOrEqualTo ( 18 ) . WithMessage ( "You must be 18 or older" ) ;
231+ }
232+ }
233+ }
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