GenericEnumConverter Class
Definition
Important
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Converts between a string and an enumeration type.
public ref class GenericEnumConverter sealed : System::Configuration::ConfigurationConverterBasepublic sealed class GenericEnumConverter : System.Configuration.ConfigurationConverterBasetype GenericEnumConverter = class
inherit ConfigurationConverterBasePublic NotInheritable Class GenericEnumConverter
Inherits ConfigurationConverterBase- Inheritance
Examples
The following code example shows how to access a custom section property that uses the GenericEnumConverter type.
using System;
using System.IO;
using System.ComponentModel;
using System.Configuration;
namespace Samples.AspNet
{
public sealed class UsingGenericEnumConverter
{
public static void GetPermission()
{
try
{
CustomSection section =
ConfigurationManager.GetSection("CustomSection")
as CustomSection;
Console.WriteLine("Default Permission: {0}",
section.Permission.ToString());
}
catch (System.Exception e)
{
Console.WriteLine(e.Message);
}
}
public static void SetPermission()
{
try
{
System.Configuration.Configuration config =
ConfigurationManager.OpenExeConfiguration(
ConfigurationUserLevel.None);
CustomSection section =
config.Sections.Get("CustomSection")
as CustomSection;
section.Permission =
CustomSection.Permissions.FullControl;
section.SectionInformation.ForceSave = true;
config.Save(ConfigurationSaveMode.Full);
config.Save();
Console.WriteLine("Current Protection: {0}",
section.Permission.ToString());
}
catch (System.Exception e)
{
Console.WriteLine(e.Message);
}
}
}
}
Imports System.IO
Imports System.ComponentModel
Imports System.Configuration
NotInheritable Public Class UsingGenericEnumConverter
Public Shared Sub GetPermission()
Try
Dim section As CustomSection = _
ConfigurationManager.GetSection("CustomSection")
Console.WriteLine("Default Permission: {0}", _
section.Permission.ToString())
Catch e As System.Exception
Console.WriteLine(e.Message)
End Try
End Sub
Public Shared Sub SetPermission()
Try
Dim config _
As System.Configuration.Configuration = _
ConfigurationManager.OpenExeConfiguration( _
ConfigurationUserLevel.None)
Dim section As CustomSection = _
config.Sections.Get("CustomSection")
section.Permission = _
CustomSection.Permissions.FullControl
section.SectionInformation.ForceSave = True
config.Save(ConfigurationSaveMode.Full)
config.Save()
Console.WriteLine( _
"Current Protection: {0}", _
section.Permission.ToString())
Catch e As System.Exception
Console.WriteLine(e.Message)
End Try
End Sub
End Class
The following code example shows how to define a custom enumerator property accessed in the previous example. Notice that there is no need to specify the GenericEnumConverter type; it is implicitly invoked by the system.
public enum Permissions
{
FullControl = 0,
Modify = 1,
ReadExecute = 2,
Read = 3,
Write = 4,
SpecialPermissions = 5
}
[ConfigurationProperty("permission", DefaultValue = Permissions.Read)]
public Permissions Permission
{
get
{
return (Permissions)this["permission"];
}
set
{
this["permission"] = value;
}
}
Public Enum Permissions
FullControl = 0
Modify = 1
ReadExecute = 2
Read = 3
Write = 4
SpecialPermissions = 5
End Enum 'Permissions
<ConfigurationProperty("permission", _
DefaultValue:=Permissions.Read)> _
Public Property Permission() As Permissions
Get
Return CType(Me("permission"), Permissions)
End Get
Set(ByVal value As Permissions)
Me("permission") = Value
End Set
End Property
The following example is a configuration excerpt used by the previous example.
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="CustomSection"
type="Samples.AspNet.CustomSection,
ConfigurationConverters,
Version=1.0.0.0, Culture=neutral,
PublicKeyToken=null"
allowDefinition="Everywhere"
allowExeDefinition="MachineToApplication"
restartOnExternalChanges="true" />
</configSections>
<CustomSection fileName="default.txt" maxIdleTime="90" timeDelay="infinite" cdStr="str0, str1" permission="Read" maxUsers="Infinite"/>
</configuration>
Remarks
This type, like all the other configuration converter types, converts strings found in the configuration file to and from the related strongly typed properties.
In particular, the GenericEnumConverter object converts a String value, assigned to a configuration property, to an Enum value and vice versa.
Constructors
| GenericEnumConverter(Type) |
Initializes a new instance of the GenericEnumConverter class. |
Methods
| CanConvertFrom(ITypeDescriptorContext, Type) |
Determines whether the conversion is allowed. (Inherited from ConfigurationConverterBase) |
| CanConvertFrom(Type) |
Returns whether this converter can convert an object of the given type to the type of this converter. (Inherited from TypeConverter) |
| CanConvertTo(ITypeDescriptorContext, Type) |
Determines whether the conversion is allowed. (Inherited from ConfigurationConverterBase) |
| CanConvertTo(Type) |
Returns whether this converter can convert the object to the specified type. (Inherited from TypeConverter) |
| ConvertFrom(ITypeDescriptorContext, CultureInfo, Object) | |
| ConvertFrom(Object) |
Converts the given value to the type of this converter. (Inherited from TypeConverter) |
| ConvertFromInvariantString(ITypeDescriptorContext, String) |
Converts the given string to the type of this converter, using the invariant culture and the specified context. (Inherited from TypeConverter) |
| ConvertFromInvariantString(String) |
Converts the given string to the type of this converter, using the invariant culture. (Inherited from TypeConverter) |
| ConvertFromString(ITypeDescriptorContext, CultureInfo, String) |
Converts the given text to an object, using the specified context and culture information. (Inherited from TypeConverter) |
| ConvertFromString(ITypeDescriptorContext, String) |
Converts the given text to an object, using the specified context. (Inherited from TypeConverter) |
| ConvertFromString(String) |
Converts the specified text to an object. (Inherited from TypeConverter) |
| ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type) | |
| ConvertTo(Object, Type) |
Converts the given value object to the specified type, using the arguments. (Inherited from TypeConverter) |
| ConvertToInvariantString(ITypeDescriptorContext, Object) |
Converts the specified value to a culture-invariant string representation, using the specified context. (Inherited from TypeConverter) |
| ConvertToInvariantString(Object) |
Converts the specified value to a culture-invariant string representation. (Inherited from TypeConverter) |
| ConvertToString(ITypeDescriptorContext, CultureInfo, Object) |
Converts the given value to a string representation, using the specified context and culture information. (Inherited from TypeConverter) |
| ConvertToString(ITypeDescriptorContext, Object) |
Converts the given value to a string representation, using the given context. (Inherited from TypeConverter) |
| ConvertToString(Object) |
Converts the specified value to a string representation. (Inherited from TypeConverter) |
| CreateInstance(IDictionary) |
Re-creates an Object given a set of property values for the object. (Inherited from TypeConverter) |
| CreateInstance(ITypeDescriptorContext, IDictionary) |
Creates an instance of the type that this TypeConverter is associated with, using the specified context, given a set of property values for the object. (Inherited from TypeConverter) |
| Equals(Object) |
Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetConvertFromException(Object) |
Returns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter) |
| GetConvertToException(Object, Type) |
Returns an exception to throw when a conversion cannot be performed. (Inherited from TypeConverter) |
| GetCreateInstanceSupported() |
Returns whether changing a value on this object requires a call to the CreateInstance(IDictionary) method to create a new value. (Inherited from TypeConverter) |
| GetCreateInstanceSupported(ITypeDescriptorContext) |
Returns whether changing a value on this object requires a call to CreateInstance(IDictionary) to create a new value, using the specified context. (Inherited from TypeConverter) |
| GetHashCode() |
Serves as the default hash function. (Inherited from Object) |
| GetProperties(ITypeDescriptorContext, Object, Attribute[]) |
Returns a collection of properties for the type of array specified by the value parameter, using the specified context and attributes. (Inherited from TypeConverter) |
| GetProperties(ITypeDescriptorContext, Object) |
Returns a collection of properties for the type of array specified by the value parameter, using the specified context. (Inherited from TypeConverter) |
| GetProperties(Object) |
Returns a collection of properties for the type of array specified by the value parameter. (Inherited from TypeConverter) |
| GetPropertiesSupported() |
Returns whether this object supports properties. (Inherited from TypeConverter) |
| GetPropertiesSupported(ITypeDescriptorContext) |
Returns whether this object supports properties, using the specified context. (Inherited from TypeConverter) |
| GetStandardValues() |
Returns a collection of standard values from the default context for the data type this type converter is designed for. (Inherited from TypeConverter) |
| GetStandardValues(ITypeDescriptorContext) |
Returns a collection of standard values for the data type this type converter is designed for when provided with a format context. (Inherited from TypeConverter) |
| GetStandardValuesExclusive() |
Returns whether the collection of standard values returned from GetStandardValues() is an exclusive list. (Inherited from TypeConverter) |
| GetStandardValuesExclusive(ITypeDescriptorContext) |
Returns whether the collection of standard values returned from GetStandardValues() is an exclusive list of possible values, using the specified context. (Inherited from TypeConverter) |
| GetStandardValuesSupported() |
Returns whether this object supports a standard set of values that can be picked from a list. (Inherited from TypeConverter) |
| GetStandardValuesSupported(ITypeDescriptorContext) |
Returns whether this object supports a standard set of values that can be picked from a list, using the specified context. (Inherited from TypeConverter) |
| GetType() |
Gets the Type of the current instance. (Inherited from Object) |
| IsValid(ITypeDescriptorContext, Object) |
Returns whether the given value object is valid for this type and for the specified context. (Inherited from TypeConverter) |
| IsValid(Object) |
Returns whether the given value object is valid for this type. (Inherited from TypeConverter) |
| MemberwiseClone() |
Creates a shallow copy of the current Object. (Inherited from Object) |
| SortProperties(PropertyDescriptorCollection, String[]) |
Sorts a collection of properties. (Inherited from TypeConverter) |
| ToString() |
Returns a string that represents the current object. (Inherited from Object) |
