CustomValidationAttribute 类

定义

指定用于验证属性或类实例的自定义验证方法。Specifies a custom validation method that is used to validate a property or class instance.

public ref class CustomValidationAttribute sealed : System::ComponentModel::DataAnnotations::ValidationAttribute
[System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Field | System.AttributeTargets.Method | System.AttributeTargets.Parameter | System.AttributeTargets.Property, AllowMultiple=true)]
public sealed class CustomValidationAttribute : System.ComponentModel.DataAnnotations.ValidationAttribute
[<System.AttributeUsage(System.AttributeTargets.Class | System.AttributeTargets.Field | System.AttributeTargets.Method | System.AttributeTargets.Parameter | System.AttributeTargets.Property, AllowMultiple=true)>]
type CustomValidationAttribute = class
    inherit ValidationAttribute
Public NotInheritable Class CustomValidationAttribute
Inherits ValidationAttribute
继承
CustomValidationAttribute
属性

注解

CustomValidationAttributeIsValid 调用方法来执行验证时,特性用于执行自定义验证。The CustomValidationAttribute attribute is used to perform custom validation when the IsValid method is invoked to perform validation. 然后,IsValid 方法重定向对由 Method 属性标识的方法的调用,后者反过来执行实际验证。The IsValid method then redirects the call to the method that is identified by the Method property, which in turn performs the actual validation.

CustomValidationAttribute特性可应用于类型、属性、字段、方法和方法参数。The CustomValidationAttribute attribute can be applied to types, properties, fields, methods, and method parameters. 将值应用于属性后,只要将值分配给该属性,就会调用属性。When it is applied to a property, the attribute is invoked whenever a value is assigned to that property. 当应用于方法时,只要程序调用该方法,就会调用特性。When it is applied to a method, the attribute is invoked whenever the program calls that method. 当应用于方法参数时,将在调用方法之前调用特性。When it is applied to a method parameter, the attribute is invoked before the method is called.

有关使用特性的详细信息,请参阅 特性For more information about using attributes, see Attributes.

构造函数

CustomValidationAttribute(Type, String)

初始化 CustomValidationAttribute 类的新实例。Initializes a new instance of the CustomValidationAttribute class.

属性

ErrorMessage

获取或设置一条在验证失败的情况下与验证控件关联的错误消息。Gets or sets an error message to associate with a validation control if validation fails.

(继承自 ValidationAttribute)
ErrorMessageResourceName

获取或设置错误消息资源的名称,在验证失败的情况下,要使用该名称来查找 ErrorMessageResourceType 属性值。Gets or sets the error message resource name to use in order to look up the ErrorMessageResourceType property value if validation fails.

(继承自 ValidationAttribute)
ErrorMessageResourceType

获取或设置在验证失败的情况下用于查找错误消息的资源类型。Gets or sets the resource type to use for error-message lookup if validation fails.

(继承自 ValidationAttribute)
ErrorMessageString

获取本地化的验证错误消息。Gets the localized validation error message.

(继承自 ValidationAttribute)
Method

获取验证方法。Gets the validation method.

RequiresValidationContext

获取指示特性是否要求验证上下文的值。Gets a value that indicates whether the attribute requires validation context.

(继承自 ValidationAttribute)
TypeId

获取此特性的唯一标识符。Gets a unique identifier for this attribute.

TypeId

在派生类中实现时,获取此 Attribute 的唯一标识符。When implemented in a derived class, gets a unique identifier for this Attribute.

(继承自 Attribute)
ValidatorType

获取执行自定义验证的类型。Gets the type that performs custom validation.

方法

Equals(Object)

返回一个值,该值指示此实例是否与指定的对象相等。Returns a value that indicates whether this instance is equal to a specified object.

(继承自 Attribute)
FormatErrorMessage(String)

设置验证错误消息的格式。Formats a validation error message.

GetHashCode()

返回此实例的哈希代码。Returns the hash code for this instance.

(继承自 Attribute)
GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
GetValidationResult(Object, ValidationContext)

检查指定的值对于当前的验证特性是否有效。Checks whether the specified value is valid with respect to the current validation attribute.

(继承自 ValidationAttribute)
IsDefaultAttribute()

在派生类中重写时,指示此实例的值是否是派生类的默认值。When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.

(继承自 Attribute)
IsValid(Object)

确定对象的指定值是否有效。Determines whether the specified value of the object is valid.

(继承自 ValidationAttribute)
IsValid(Object, ValidationContext)

根据当前的验证特性来验证指定的值。Validates the specified value with respect to the current validation attribute.

(继承自 ValidationAttribute)
Match(Object)

当在派生类中重写时,返回一个指示此实例是否等于指定对象的值。When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.

(继承自 Attribute)
MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
ToString()

返回表示当前对象的字符串。Returns a string that represents the current object.

(继承自 Object)
Validate(Object, String)

验证指定的对象。Validates the specified object.

(继承自 ValidationAttribute)
Validate(Object, ValidationContext)

验证指定的对象。Validates the specified object.

(继承自 ValidationAttribute)

显式接口实现

_Attribute.GetIDsOfNames(Guid, IntPtr, UInt32, UInt32, IntPtr)

将一组名称映射为对应的一组调度标识符。Maps a set of names to a corresponding set of dispatch identifiers.

(继承自 Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

检索对象的类型信息,然后可以使用该信息获取接口的类型信息。Retrieves the type information for an object, which can be used to get the type information for an interface.

(继承自 Attribute)
_Attribute.GetTypeInfoCount(UInt32)

检索对象提供的类型信息接口的数量(0 或 1)。Retrieves the number of type information interfaces that an object provides (either 0 or 1).

(继承自 Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

提供对某一对象公开的属性和方法的访问。Provides access to properties and methods exposed by an object.

(继承自 Attribute)

适用于