StringValidatorAttribute 类

定义

以声明的方式指示 .NET 对配置属性执行字符串验证。Declaratively instructs .NET to perform string validation on a configuration property. 此类不能被继承。This class cannot be inherited.

public ref class StringValidatorAttribute sealed : System::Configuration::ConfigurationValidatorAttribute
[System.AttributeUsage(System.AttributeTargets.Property)]
public sealed class StringValidatorAttribute : System.Configuration.ConfigurationValidatorAttribute
[<System.AttributeUsage(System.AttributeTargets.Property)>]
type StringValidatorAttribute = class
    inherit ConfigurationValidatorAttribute
Public NotInheritable Class StringValidatorAttribute
Inherits ConfigurationValidatorAttribute
继承
属性

示例

下面的示例演示如何使用对象来修饰自定义对象的属性 ConfigurationSection StringValidatorAttributeThe following example shows how to decorate the properties of a custom ConfigurationSection object using the StringValidatorAttribute object.

[ConfigurationProperty("fileName", DefaultValue = "default.txt",
    IsRequired = true, IsKey = false)]
[StringValidator(InvalidCharacters = " ~!@#$%^&*()[]{}/;'\"|\\",
    MinLength = 1, MaxLength = 60)]
public string FileName
{
    get
    {
        return (string)this["fileName"];
    }
    set
    {
        this["fileName"] = value;
    }
}

<ConfigurationProperty("fileName", _
DefaultValue:="default.txt", _
IsRequired:=True, _
IsKey:=False), _
StringValidator( _
InvalidCharacters:=" ~!@#$%^&*()[]{}/;'""|\", _
MinLength:=1, _
MaxLength:=60)> _
Public Property FileName() As String
    Get
        Return CStr(Me("fileName"))
    End Get
    Set(ByVal value As String)
        Me("fileName") = value
    End Set
End Property

注解

使用 StringValidatorAttribute 来修饰配置属性。You use the StringValidatorAttribute to decorate a configuration property. 这是为了指导 .NET 使用验证属性 StringValidator ,并向其传递修饰参数的值。This is to instruct .NET to validate the property using the StringValidator and pass to it the value of the decorating parameters.

只能将对象应用于 StringValidatorAttribute 属性类型。You can apply StringValidatorAttribute objects to property types only.

构造函数

StringValidatorAttribute()

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

属性

InvalidCharacters

获取或设置属性的无效字符。Gets or sets the invalid characters for the property.

MaxLength

获取或设置分配给属性的字符串允许的最大长度。Gets or sets the maximum length allowed for the string to assign to the property.

MinLength

获取或设置分配给属性的字符串允许的最小值。Gets or sets the minimum allowed value for the string to assign to the property.

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)
ValidatorInstance

获取 StringValidator 类的实例。Gets an instance of the StringValidator class.

ValidatorType

获取验证程序特性的类型。Gets the type of the validator attribute.

(继承自 ConfigurationValidatorAttribute)

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)
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)
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)
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)

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

另请参阅