StringValidatorAttribute Class
Declaratively instructs the .NET Framework to perform string validation on a configuration property. This class cannot be inherited.
System.Attribute
System.Configuration.ConfigurationValidatorAttribute
System.Configuration.StringValidatorAttribute
Namespace: System.Configuration
Assembly: System.Configuration (in System.Configuration.dll)
The StringValidatorAttribute type exposes the following members.
| Name | Description | |
|---|---|---|
 | StringValidatorAttribute | Initializes a new instance of the StringValidatorAttribute class. |
| Name | Description | |
|---|---|---|
| InvalidCharacters | Gets or sets the invalid characters for the property. |
| MaxLength | Gets or sets the maximum length allowed for the string to assign to the property. |
| MinLength | Gets or sets the minimum allowed value for the string to assign to the property. |
| TypeId | When implemented in a derived class, gets a unique identifier for this Attribute. (Inherited from Attribute.) |
| ValidatorInstance | Gets an instance of the StringValidator class. (Overrides ConfigurationValidatorAttribute.ValidatorInstance.) |
| ValidatorType | Gets the type of the validator attribute. (Inherited from ConfigurationValidatorAttribute.) |
| Name | Description | |
|---|---|---|
| Equals | Infrastructure. Returns a value that indicates whether this instance is equal to a specified object. (Inherited from Attribute.) |
| GetHashCode | Returns the hash code for this instance. (Inherited from Attribute.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| IsDefaultAttribute | When overridden in a derived class, indicates whether the value of this instance is the default value for the derived class. (Inherited from Attribute.) |
| Match | When overridden in a derived class, returns a value that indicates whether this instance equals a specified object. (Inherited from Attribute.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
| Name | Description | |
|---|---|---|
| _Attribute.GetIDsOfNames | Maps a set of names to a corresponding set of dispatch identifiers. (Inherited from Attribute.) |
| _Attribute.GetTypeInfo | Retrieves the type information for an object, which can be used to get the type information for an interface. (Inherited from Attribute.) |
| _Attribute.GetTypeInfoCount | Retrieves the number of type information interfaces that an object provides (either 0 or 1). (Inherited from Attribute.) |
| _Attribute.Invoke | Provides access to properties and methods exposed by an object. (Inherited from Attribute.) |
You use the StringValidatorAttribute to decorate a configuration property. This is to instruct the .NET Framework to validate the property using the StringValidator and pass to it the value of the decorating parameters.
You can apply StringValidatorAttribute objects to property types only.
The 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; } }
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
