StringValidatorAttribute 類別

定義

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

繼承

Object

Attribute

ConfigurationValidatorAttribute

StringValidatorAttribute

屬性

AttributeUsageAttribute

範例

以下範例說明如何利用物件StringValidatorAttribute裝飾自訂ConfigurationSection物件的屬性。

[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

備註

你可以用 來 StringValidatorAttribute 裝飾一個設定屬性。 這是指示.NET使用 StringValidator 驗證屬性，並將裝飾參數的值傳給它。

你只能把物件套用 StringValidatorAttribute 到屬性類型。

另請參閱

• ConfigurationValidatorAttribute
• ConfigurationPropertyAttribute
• StringValidator