RegularExpressionAttribute RegularExpressionAttribute RegularExpressionAttribute RegularExpressionAttribute Class

定义

指定 ASP.NET 动态数据中的数据字段值必须与指定的正则表达式匹配。Specifies that a data field value in ASP.NET Dynamic Data must match the specified regular expression.

public ref class RegularExpressionAttribute : System::ComponentModel::DataAnnotations::ValidationAttribute
[System.AttributeUsage(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property, AllowMultiple=false)]
[System.AttributeUsage(System.AttributeTargets.Property | System.AttributeTargets.Field, AllowMultiple=false)]
[System.AttributeUsage(System.AttributeTargets.Property | System.AttributeTargets.Field | System.AttributeTargets.Parameter, AllowMultiple=false)]
public class RegularExpressionAttribute : System.ComponentModel.DataAnnotations.ValidationAttribute
type RegularExpressionAttribute = class
    inherit ValidationAttribute
Public Class RegularExpressionAttribute
Inherits ValidationAttribute
继承
RegularExpressionAttributeRegularExpressionAttributeRegularExpressionAttributeRegularExpressionAttribute
属性

示例

下面的示例演示如何使用RegularExpressionAttribute特性验证 FirstName 和 LastName 数据字段。The following example shows how to use the RegularExpressionAttribute attribute to validate the FirstName and LastName data fields. 正则表达式允许最多 40 大写和小写字符。The regular expression allows up to 40 uppercase and lowercase characters. 该示例执行以下任务:The example performs the following tasks:

  • 实现元数据的分部类和关联的元数据类。Implements a metadata partial class and the associated metadata class.

  • 在关联的元数据类中,应用RegularExpressionAttribute属性到 FirstName 和 LastName 数据字段,指定的模式和自定义错误消息。In the associated metadata class, applies the RegularExpressionAttribute attribute to the FirstName and LastName data fields, specifying the pattern and custom error messages.

using System;
using System.Web.DynamicData;
using System.ComponentModel.DataAnnotations;


[MetadataType(typeof(CustomerMetaData))]
public partial class Customer
{

   
}

public class CustomerMetaData
{
   
    // Allow up to 40 uppercase and lowercase 
    // characters. Use custom error.
    [RegularExpression(@"^[a-zA-Z''-'\s]{1,40}$", 
         ErrorMessage = "Characters are not allowed.")]
    public object FirstName;

    // Allow up to 40 uppercase and lowercase 
    // characters. Use standard error.
    [RegularExpression(@"^[a-zA-Z''-'\s]{1,40}$")]
    public object LastName;
}

Imports System
Imports System.Web.DynamicData
Imports System.ComponentModel.DataAnnotations


<MetadataType(GetType(CustomerMetaData))> _
Partial Public Class Customer

    
End Class

Public Class CustomerMetaData
    
    ' Allow up to 40 uppercase and lowercase 
    ' characters. Use custom error.
    <RegularExpression("^[a-zA-Z''-'\s]{1,40}$", _
                       ErrorMessage:="Characters are not allowed.")> _
    Public FirstName As Object

    ' Allow up to 40 uppercase and lowercase 
    ' characters. Use standard error.
    <RegularExpression("^[a-zA-Z''-'\s]{1,40}$")> _
    Public LastName As Object
End Class

注解

在需要针对正则表达式验证属性的值时,可将 RegularExpressionAttribute 特性应用于属性。You apply the RegularExpressionAttribute attribute to a property when you need to validate values for the property against a regular expression. 正则表达式,可指定非常精确地有效的值的格式。The regular expression enables you to specify very precisely the format of valid values. Pattern 属性包含该正则表达式。如果该属性的值为 null 或为空字符串 (""),则此值将自动传递对 RegularExpressionAttribute 特性的验证。The Pattern property contains the regular expression.If the value of the property is null or an empty string (""), the value automatically passes validation for the RegularExpressionAttribute attribute. 若要验证的值不是null或空字符串,使用RequiredAttribute属性。To validate that the value is not null or an empty string, use the RequiredAttribute attribute.

构造函数

RegularExpressionAttribute(String) RegularExpressionAttribute(String) RegularExpressionAttribute(String) RegularExpressionAttribute(String)

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

属性

ErrorMessage ErrorMessage ErrorMessage 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.

(Inherited from ValidationAttribute)
ErrorMessageResourceName ErrorMessageResourceName ErrorMessageResourceName 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.

(Inherited from ValidationAttribute)
ErrorMessageResourceType ErrorMessageResourceType ErrorMessageResourceType 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.

(Inherited from ValidationAttribute)
ErrorMessageString ErrorMessageString ErrorMessageString ErrorMessageString

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

(Inherited from ValidationAttribute)
MatchTimeoutInMilliseconds MatchTimeoutInMilliseconds MatchTimeoutInMilliseconds MatchTimeoutInMilliseconds

获取或设置用于在操作超时前执行单个匹配操作的时间量(以毫秒为单位)。Gets or sets the amount of time in milliseconds to execute a single matching operation before the operation times out.

Pattern Pattern Pattern Pattern

获取正则表达式模式。Gets the regular expression pattern.

RequiresValidationContext RequiresValidationContext RequiresValidationContext 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.

(Inherited from ValidationAttribute)
TypeId TypeId TypeId 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.

(Inherited from Attribute)

方法

Equals(Object) Equals(Object) Equals(Object) 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.

(Inherited from Attribute)
FormatErrorMessage(String) FormatErrorMessage(String) FormatErrorMessage(String) FormatErrorMessage(String)

对在正则表达式验证失败的情况下要显示的错误消息进行格式设置。Formats the error message to display if the regular expression validation fails.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

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

(Inherited from Attribute)
GetType() GetType() GetType() GetType()

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

(Inherited from Object)
GetValidationResult(Object, ValidationContext) GetValidationResult(Object, ValidationContext) GetValidationResult(Object, ValidationContext) 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.

(Inherited from ValidationAttribute)
IsDefaultAttribute() IsDefaultAttribute() IsDefaultAttribute() 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.

(Inherited from Attribute)
IsValid(Object) IsValid(Object) IsValid(Object) IsValid(Object)

检查用户输入的值与正则表达式模式是否匹配。Checks whether the value entered by the user matches the regular expression pattern.

IsValid(Object, ValidationContext) IsValid(Object, ValidationContext) IsValid(Object, ValidationContext) 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.

(Inherited from ValidationAttribute)
Match(Object) Match(Object) Match(Object) 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.

(Inherited from Attribute)
MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

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

(Inherited from Object)
ToString() ToString() ToString() ToString()

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

(Inherited from Object)
Validate(Object, String) Validate(Object, String) Validate(Object, String) Validate(Object, String)

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

(Inherited from ValidationAttribute)
Validate(Object, ValidationContext) Validate(Object, ValidationContext) Validate(Object, ValidationContext) Validate(Object, ValidationContext)

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

(Inherited from ValidationAttribute)

显式界面实现

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

(Inherited from Attribute)
_Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _Attribute.GetTypeInfo(UInt32, UInt32, IntPtr) _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.

(Inherited from Attribute)
_Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32) _Attribute.GetTypeInfoCount(UInt32) _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).

(Inherited from Attribute)
_Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _Attribute.Invoke(UInt32, Guid, UInt32, Int16, IntPtr, IntPtr, IntPtr, IntPtr) _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.

(Inherited from Attribute)

适用于