CustomValidationAttribute 類別

定義

指定用來驗證屬性或類別執行個體的自訂驗證方法。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
繼承
CustomValidationAttribute
屬性

備註

CustomValidationAttribute當叫用 IsValid 方法來執行驗證時,會使用屬性來執行自訂驗證。The CustomValidationAttribute attribute is used to perform custom validation when the IsValid method is invoked to perform validation. IsValid方法接著會將呼叫重新導向至由屬性識別的方法,而該方法接著會 Method 執行實際的驗證。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屬性可以套用至類型、屬性、欄位、方法和方法參數。The CustomValidationAttribute attribute can be applied to types, properties, fields, methods, and method parameters. 當它套用至屬性時,只要將值指派給該屬性,就會叫用屬性。When it is applied to a property, the attribute is invoked whenever a value is assigned to that property. 當程式套用至方法時,每當程式呼叫該方法時,就會叫用屬性。When it is applied to a method, the attribute is invoked whenever the program calls that method. 當它套用至方法參數時,會在呼叫方法之前叫用屬性。When it is applied to a method parameter, the attribute is invoked before the method is called.

如需使用屬性的詳細資訊,請參閱 屬性For more information about using attributes, see Attributes.

建構函式

CustomValidationAttribute(Type, String)

初始化 CustomValidationAttribute 類別的新執行個體。Initializes a new instance of the CustomValidationAttribute class.

屬性

ErrorMessage

取得或設定錯誤訊息,此錯誤訊息會在驗證失敗時與驗證控制項產生關聯。Gets or sets an error message to associate with a validation control if validation fails.

(繼承來源 ValidationAttribute)
ErrorMessageResourceName

取得或設定要在驗證失敗時用來查閱 ErrorMessageResourceType 屬性值的錯誤訊息資源名稱。Gets or sets the error message resource name to use in order to look up the ErrorMessageResourceType property value if validation fails.

(繼承來源 ValidationAttribute)
ErrorMessageResourceType

取得或設定資源類型,此類型可在驗證失敗時用於查閱錯誤訊息。Gets or sets the resource type to use for error-message lookup if validation fails.

(繼承來源 ValidationAttribute)
ErrorMessageString

取得當地語系化的驗證錯誤訊息。Gets the localized validation error message.

(繼承來源 ValidationAttribute)
Method

取得驗證方法。Gets the validation method.

RequiresValidationContext

取得值,這個值表示屬性是否需要驗證內容。Gets a value that indicates whether the attribute requires validation context.

(繼承來源 ValidationAttribute)
TypeId

取得這個屬性的唯一識別項。Gets a unique identifier for this attribute.

TypeId

在衍生類別中實作時,取得這個 Attribute 的唯一識別碼。When implemented in a derived class, gets a unique identifier for this Attribute.

(繼承來源 Attribute)
ValidatorType

取得會執行自訂驗證的型別。Gets the type that performs custom validation.

方法

Equals(Object)

傳回值,這個值指出此執行個體是否與指定的物件相等。Returns a value that indicates whether this instance is equal to a specified object.

(繼承來源 Attribute)
FormatErrorMessage(String)

格式化驗證錯誤訊息。Formats a validation error message.

GetHashCode()

傳回這個執行個體的雜湊碼。Returns the hash code for this instance.

(繼承來源 Attribute)
GetType()

取得目前執行個體的 TypeGets the Type of the current instance.

(繼承來源 Object)
GetValidationResult(Object, ValidationContext)

檢查指定的值在目前的驗證屬性方面是否有效。Checks whether the specified value is valid with respect to the current validation attribute.

(繼承來源 ValidationAttribute)
IsDefaultAttribute()

在衍生類別中覆寫時,表示這個執行個體的值是衍生類別的預設值。When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class.

(繼承來源 Attribute)
IsValid(Object)

判斷指定的物件值是否有效。Determines whether the specified value of the object is valid.

(繼承來源 ValidationAttribute)
IsValid(Object, ValidationContext)

根據目前的驗證屬性,驗證指定的值。Validates the specified value with respect to the current validation attribute.

(繼承來源 ValidationAttribute)
Match(Object)

在衍生類別中覆寫時,會傳回值,表示這個執行個體是否等於指定物件。When overridden in a derived class, returns a value that indicates whether this instance equals a specified object.

(繼承來源 Attribute)
MemberwiseClone()

建立目前 Object 的淺層複製。Creates a shallow copy of the current Object.

(繼承來源 Object)
ToString()

傳回代表目前物件的字串。Returns a string that represents the current object.

(繼承來源 Object)
Validate(Object, String)

驗證指定的物件。Validates the specified object.

(繼承來源 ValidationAttribute)
Validate(Object, ValidationContext)

驗證指定的物件。Validates the specified object.

(繼承來源 ValidationAttribute)

明確介面實作

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

將一組名稱對應至一組對應的分派識別項 (Dispatch Identifier)。Maps a set of names to a corresponding set of dispatch identifiers.

(繼承來源 Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr)

擷取物件的類型資訊,可以用來取得介面的類型資訊。Retrieves the type information for an object, which can be used to get the type information for an interface.

(繼承來源 Attribute)
_Attribute.GetTypeInfoCount(UInt32)

擷取物件提供的類型資訊介面數目 (0 或 1)。Retrieves the number of type information interfaces that an object provides (either 0 or 1).

(繼承來源 Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr)

提供物件所公開的屬性和方法的存取權。Provides access to properties and methods exposed by an object.

(繼承來源 Attribute)

適用於