StringValidatorAttribute.InvalidCharacters Property    
Definition
Important
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Gets or sets the invalid characters for the property.
public:
 property System::String ^ InvalidCharacters { System::String ^ get(); void set(System::String ^ value); };public string InvalidCharacters { get; set; }member this.InvalidCharacters : string with get, setPublic Property InvalidCharacters As StringProperty Value
The string that contains the set of characters that are not allowed for the property.
Examples
The following example shows how to use the InvalidCharacters property.
[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