StringValidatorAttribute 类

定义

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

Object

Attribute

ConfigurationValidatorAttribute

StringValidatorAttribute

属性

AttributeUsageAttribute

示例

以下示例演示如何使用ConfigurationSection对象修饰自定义StringValidatorAttribute对象的属性。

[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 修饰配置属性。 这是指示.NET使用 StringValidator验证属性，并将其传递给修饰参数的值。

只能将对象应用于 StringValidatorAttribute 属性类型。

另请参阅

• ConfigurationValidatorAttribute
• ConfigurationPropertyAttribute
• StringValidator