CustomError Class

Definition

Namespace:

System.Web.Configuration

Assembly:

System.Web.dll

Configures a CustomError section to map an ASP.NET error code to a custom page. This class cannot be inherited.

public ref class CustomError sealed : System::Configuration::ConfigurationElement

public sealed class CustomError : System.Configuration.ConfigurationElement

type CustomError = class
    inherit ConfigurationElement

Public NotInheritable Class CustomError
Inherits ConfigurationElement

Inheritance

Object

ConfigurationElement

CustomError

Examples

This example demonstrates how to specify values declaratively for several attributes of the customErrors section, which can also be accessed as members of the CustomError class.

The following configuration file example shows how to specify values declaratively for the customErrors section.

<customErrors mode="RemoteOnly"  
  defaultRedirect="customerror.htm">  
    <error statusCode="404" redirect="customerror404.htm"/>  
</customErrors>  

The following code example demonstrates how to use the CustomError class.

// Get the Web application configuration.
Configuration configuration =
    WebConfigurationManager.OpenWebConfiguration(
    "/aspnetTest");

// Get the section.
CustomErrorsSection customErrors =
    (CustomErrorsSection)configuration.GetSection(
  "system.web/customErrors");

// Get the collection.
CustomErrorCollection customErrorsCollection =
    customErrors.Errors;

' Get the Web application configuration.
  Dim configuration _
  As System.Configuration.Configuration = _
  WebConfigurationManager.OpenWebConfiguration( _
  "/aspnetTest")

' Get the section.
  Dim customErrors As CustomErrorsSection = _
   CType(configuration.GetSection( _
   "system.web/customErrors"), CustomErrorsSection)

' Get the collection.
  Dim customErrorsCollection _
  As CustomErrorCollection = _
  customErrors.Errors

Remarks

The CustomError class provides a way to programmatically access and modify the error section of a configuration file. This type is part of a group that includes the CustomErrorCollection, CustomErrorsMode, and CustomErrorsSection.

Note

When you define a custom error, ASP.NET assigns to it the standard error normally issued by the underlying service, such as IIS. For instance, if you define a custom error for the status code 404, ASP.NET will issue it anytime you refer to a non-existing .aspx page. The custom errors are only issued for those elements handled by ASP.NET. For instance, if you refer to a non-existing .htm page, IIS issues the standard 404 error.

Constructors

CustomError(Int32, String)

Initializes a new instance of the CustomError class.

Properties

CurrentConfiguration	Gets a reference to the top-level Configuration instance that represents the configuration hierarchy that the current ConfigurationElement instance belongs to. (Inherited from ConfigurationElement)
ElementInformation	Gets an ElementInformation object that contains the non-customizable information and functionality of the ConfigurationElement object. (Inherited from ConfigurationElement)
ElementProperty	Gets the ConfigurationElementProperty object that represents the ConfigurationElement object itself. (Inherited from ConfigurationElement)
EvaluationContext	Gets the ContextInformation object for the ConfigurationElement object. (Inherited from ConfigurationElement)
HasContext	Gets a value that indicates whether the CurrentConfiguration property is null. (Inherited from ConfigurationElement)
Item[ConfigurationProperty]	Gets or sets a property or attribute of this configuration element. (Inherited from ConfigurationElement)
Item[String]	Gets or sets a property, attribute, or child element of this configuration element. (Inherited from ConfigurationElement)
LockAllAttributesExcept	Gets the collection of locked attributes. (Inherited from ConfigurationElement)
LockAllElementsExcept	Gets the collection of locked elements. (Inherited from ConfigurationElement)
LockAttributes	Gets the collection of locked attributes. (Inherited from ConfigurationElement)
LockElements	Gets the collection of locked elements. (Inherited from ConfigurationElement)
LockItem	Gets or sets a value indicating whether the element is locked. (Inherited from ConfigurationElement)
Properties	Gets the collection of properties. (Inherited from ConfigurationElement)
Redirect	Gets or sets the redirection URL.
StatusCode	Gets or sets the HTTP error status code.

Methods

DeserializeElement(XmlReader, Boolean)	Reads XML from the configuration file. (Inherited from ConfigurationElement)
Equals(Object)	Compares CustomError errors.
GetHashCode()	Gets the CustomError object hash code.
GetTransformedAssemblyString(String)	Returns the transformed version of the specified assembly name. (Inherited from ConfigurationElement)
GetTransformedTypeString(String)	Returns the transformed version of the specified type name. (Inherited from ConfigurationElement)
GetType()	Gets the Type of the current instance. (Inherited from Object)
Init()	Sets the ConfigurationElement object to its initial state. (Inherited from ConfigurationElement)
InitializeDefault()	Used to initialize a default set of values for the ConfigurationElement object. (Inherited from ConfigurationElement)
IsModified()	Indicates whether this configuration element has been modified since it was last saved or loaded, when implemented in a derived class. (Inherited from ConfigurationElement)
IsReadOnly()	Gets a value indicating whether the ConfigurationElement object is read-only. (Inherited from ConfigurationElement)
ListErrors(IList)	Adds the invalid-property errors in this ConfigurationElement object, and in all subelements, to the passed list. (Inherited from ConfigurationElement)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
OnDeserializeUnrecognizedAttribute(String, String)	Gets a value indicating whether an unknown attribute is encountered during deserialization. (Inherited from ConfigurationElement)
OnDeserializeUnrecognizedElement(String, XmlReader)	Gets a value indicating whether an unknown element is encountered during deserialization. (Inherited from ConfigurationElement)
OnRequiredPropertyNotFound(String)	Throws an exception when a required property is not found. (Inherited from ConfigurationElement)
PostDeserialize()	Called after deserialization. (Inherited from ConfigurationElement)
PreSerialize(XmlWriter)	Called before serialization. (Inherited from ConfigurationElement)
Reset(ConfigurationElement)	Resets the internal state of the ConfigurationElement object, including the locks and the properties collections. (Inherited from ConfigurationElement)
ResetModified()	Resets the value of the IsModified() method to false when implemented in a derived class. (Inherited from ConfigurationElement)
SerializeElement(XmlWriter, Boolean)	Writes the contents of this configuration element to the configuration file when implemented in a derived class. (Inherited from ConfigurationElement)
SerializeToXmlElement(XmlWriter, String)	Writes the outer tags of this configuration element to the configuration file when implemented in a derived class. (Inherited from ConfigurationElement)
SetPropertyValue(ConfigurationProperty, Object, Boolean)	Sets a property to the specified value. (Inherited from ConfigurationElement)
SetReadOnly()	Sets the IsReadOnly() property for the ConfigurationElement object and all subelements. (Inherited from ConfigurationElement)
ToString()	Returns a string that represents the current object. (Inherited from Object)
Unmerge(ConfigurationElement, ConfigurationElement, ConfigurationSaveMode)	Modifies the ConfigurationElement object to remove all values that should not be saved. (Inherited from ConfigurationElement)

See also

• CustomErrorsSection
• CustomErrorCollection