ValidationAttribute 类

定义

充当所有验证特性的基类。Serves as the base class for all validation attributes.

public ref class ValidationAttribute abstract : Attribute
public abstract class ValidationAttribute : Attribute
type ValidationAttribute = class
    inherit Attribute
Public MustInherit Class ValidationAttribute
Inherits Attribute
继承
ValidationAttribute
派生

注解

此类基于与数据表关联的元数据强制实施验证。This class enforces validation, based on the metadata that is associated with the data table. 您可以重写此类,以创建自定义验证特性。You can override this class to create custom validation attributes.

构造函数

ValidationAttribute()

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

ValidationAttribute(Func<String>)

通过使用启用了对验证资源访问的函数来初始化 ValidationAttribute 类的新实例。Initializes a new instance of the ValidationAttribute class by using the function that enables access to validation resources.

ValidationAttribute(String)

通过使用要与验证控件关联的错误消息,来初始化 ValidationAttribute 类的新实例。Initializes a new instance of the ValidationAttribute class by using the error message to associate with a validation control.

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.

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.

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.

ErrorMessageString

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

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.

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)

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)

基于发生错误的数据字段对错误消息应用格式设置。Applies formatting to an error message, based on the data field where the error occurred.

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.

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.

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.

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.

Validate(Object, ValidationContext)

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

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