validationattribute | 易学教程

C# Custom Attribute Required If

阅读更多关于 C# Custom Attribute Required If

问题 I am just getting into custom attributes, and I absolutely love them. I am wondering if it is possible to create an attribute that gets applied to a property and denotes the name of another property in the same object. If would check to see if the referenced property has a value, and if so, the decorated attribute would be required. Something like this: [RequiredIfNotNull("ApprovedDate")] [DisplayName("Approved By")] [StringLength(50, ErrorMessage = "{0} must not exceed {1} characters")]

C# Custom Attribute Required If

阅读更多关于 C# Custom Attribute Required If

I am just getting into custom attributes, and I absolutely love them. I am wondering if it is possible to create an attribute that gets applied to a property and denotes the name of another property in the same object. If would check to see if the referenced property has a value, and if so, the decorated attribute would be required. Something like this: [RequiredIfNotNull("ApprovedDate")] [DisplayName("Approved By")] [StringLength(50, ErrorMessage = "{0} must not exceed {1} characters")] public string ApprovedBy { get; set; } [DisplayName("Approved Date")] [DisplayFormat(DataFormatString = "{0

How to call ValidationAttributes manually? (DataAnnotations and ModelState)

阅读更多关于 How to call ValidationAttributes manually? (DataAnnotations and ModelState)

We have a need within some of our logic to iterate through the properties of a model to auto-bind properties and want to extend the functionality to include the new dataannotations in C# 4.0. At the moment, I basically iterate over each property loading in all ValidationAttribute instances and attempting to validate using the Validate/IsValid function, but this doesn't seem to be working for me. As an example I have a model such as: public class HobbyModel { [Required(AllowEmptyStrings = false, ErrorMessage = "Do not allow empty strings")] [DisplayName("Hobby")] [DataType(DataType.Text)]

Custom ValidationAttribute test against whole model

阅读更多关于 Custom ValidationAttribute test against whole model

问题 I know this is probably not possible but let's say I have a model with two properties. I write a ValidationAttribute for one of the properties. Can that VA look at the other property and make a decision? So; public class QuickQuote { public String state { get; set; } [MyRequiredValidator(ErrorMessage = "Error msg")] public String familyType { get; set; } So in the above example, can the validator test to see what's in the "state" property and take that into consideration when validating

How to call ValidationAttributes manually? (DataAnnotations and ModelState)

阅读更多关于 How to call ValidationAttributes manually? (DataAnnotations and ModelState)

问题 We have a need within some of our logic to iterate through the properties of a model to auto-bind properties and want to extend the functionality to include the new dataannotations in C# 4.0. At the moment, I basically iterate over each property loading in all ValidationAttribute instances and attempting to validate using the Validate/IsValid function, but this doesn't seem to be working for me. As an example I have a model such as: public class HobbyModel { [Required(AllowEmptyStrings =

Validating Enum Values within C# MVC. Partial validation occurs - How to change validation behaviour?

阅读更多关于 Validating Enum Values within C# MVC. Partial validation occurs - How to change validation behaviour?

问题 I've been representing an enum within my razor view as a hidden field, which is posted back to an action result. I've noticed that when it binds the string value provided within the HTML, it automatically validates the value for the enum. /// <summary> /// Quiz Types Enum /// </summary> public enum QuizType { /// <summary> /// Scored Quiz /// </summary> Scored = 0, /// <summary> /// Personality Type Quiz /// </summary> Personality = 1 } Razor: @Html.HiddenFor(x => x.QuizType) Rendered HTML:

Custom ValidationAttribute test against whole model

阅读更多关于 Custom ValidationAttribute test against whole model

I know this is probably not possible but let's say I have a model with two properties. I write a ValidationAttribute for one of the properties. Can that VA look at the other property and make a decision? So; public class QuickQuote { public String state { get; set; } [MyRequiredValidator(ErrorMessage = "Error msg")] public String familyType { get; set; } So in the above example, can the validator test to see what's in the "state" property and take that into consideration when validating "familyType"? I know I can probably save the object to the session but would like to avoid any saving of

Phone Number Validation MVC

阅读更多关于 Phone Number Validation MVC

问题 I am trying to use a regular expression to validate a phone number and return an error when an invalid number or phone number is submitted. MVC Code : <ol class="row"> <li class="cell" style="width: 20%;">Phone Number:</li> <li class="cell last" style="width: 60%;"> @Html.TextBoxFor(model => model.PhoneNumber, new { @class = "textbox" }) @Html.ValidationMessageFor(model => model.PhoneNumber) </li> </ol> C# Code : [DataType(DataType.PhoneNumber)] [Display(Name = "Phone Number")] [Required

Custom validation attribute that compares the value of my property with another property's value in my model class

阅读更多关于 Custom validation attribute that compares the value of my property with another property's value in my model class

I want to create a custom validation attribute, in which I want to compare the value of my property with another property's value in my model class. For example I have in my model class: ... public string SourceCity { get; set; } public string DestinationCity { get; set; } And I want to create a custom attribute to use it like this: [Custom("SourceCity", ErrorMessage = "the source and destination should not be equal")] public string DestinationCity { get; set; } //this wil lcompare SourceCity with DestinationCity How can I get there? Here's how you could obtain the other property value: public

Custom validation attribute that compares the value of my property with another property's value in my model class

阅读更多关于 Custom validation attribute that compares the value of my property with another property's value in my model class

问题 I want to create a custom validation attribute, in which I want to compare the value of my property with another property\'s value in my model class. For example I have in my model class: ... public string SourceCity { get; set; } public string DestinationCity { get; set; } And I want to create a custom attribute to use it like this: [Custom(\"SourceCity\", ErrorMessage = \"the source and destination should not be equal\")] public string DestinationCity { get; set; } //this wil lcompare