InfiniteTimeSpanConverter Class
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Converts between a string and the standard infinite TimeSpan value.
public ref class InfiniteTimeSpanConverter sealed : System::Configuration::ConfigurationConverterBasepublic sealed class InfiniteTimeSpanConverter : System.Configuration.ConfigurationConverterBasetype InfiniteTimeSpanConverter = class
inherit ConfigurationConverterBasePublic NotInheritable Class InfiniteTimeSpanConverter
Inherits ConfigurationConverterBase- Inheritance
Examples
The following code example shows how to define a custom section property that uses the InfiniteTimeSpanConverter class.
For the complete example code that implements the custom section, refer to the ConfigurationConverterBase class.
[ConfigurationProperty("timeDelay",
DefaultValue = "infinite")]
[TypeConverter(typeof(InfiniteTimeSpanConverter))]
public TimeSpan TimeDelay
{
get
{
return (TimeSpan)this["timeDelay"];
}
set
{
this["timeDelay"] = value;
}
}
<ConfigurationProperty("timeDelay", _
DefaultValue:="infinite"), _
TypeConverter(GetType(InfiniteTimeSpanConverter))> _
Public Property TimeDelay() As TimeSpan
Get
Return CType(Me("timeDelay"), TimeSpan)
End Get
Set(ByVal value As TimeSpan)
Me("timeDelay") = Value
End Set
End Property
The following example code shows how to access the previous custom section property.
using System;
using System.IO;
using System.ComponentModel;
using System.Configuration;
namespace Samples.AspNet
{
public sealed class UsingInfiniteTimeSpanConverter
{
public static void GetTimeDelay()
{
try
{
CustomSection section =
ConfigurationManager.GetSection("CustomSection")
as CustomSection;
Console.WriteLine("timeDelay: {0}",
section.TimeDelay.ToString());
}
catch (System.Exception e)
{
Console.WriteLine(e.Message);
}
}
public static void SetTimeDelay()
{
try
{
System.Configuration.Configuration config =
ConfigurationManager.OpenExeConfiguration(
ConfigurationUserLevel.None);
CustomSection section =
config.Sections.Get("CustomSection")
as CustomSection;
TimeSpan td =
new TimeSpan();
td =
TimeSpan.FromMinutes(
DateTime.Now.Minute);
section.TimeDelay = td;
section.SectionInformation.ForceSave = true;
config.Save(ConfigurationSaveMode.Full);
config.Save();
Console.WriteLine("timeDelay: {0}",
section.TimeDelay.ToString());
}
catch (System.Exception e)
{
Console.WriteLine(e.Message);
}
}
}
}
Imports System.IO
Imports System.ComponentModel
Imports System.Configuration
NotInheritable Public Class UsingInfiniteTimeSpanConverter
Public Shared Sub GetTimeDelay()
Try
Dim section As CustomSection = _
ConfigurationManager.GetSection( _
"CustomSection")
Console.WriteLine("timeDelay: {0}", _
section.TimeDelay.ToString())
Catch e As System.Exception
Console.WriteLine(e.Message)
End Try
End Sub
Public Shared Sub SetTimeDelay()
Try
Dim config _
As System.Configuration.Configuration = _
ConfigurationManager.OpenExeConfiguration( _
ConfigurationUserLevel.None)
Dim section As CustomSection = _
config.Sections.Get("CustomSection")
Dim td As New TimeSpan()
td = _
TimeSpan.FromMinutes( _
DateTime.Now.Minute)
section.TimeDelay = td
section.SectionInformation.ForceSave = True
config.Save(ConfigurationSaveMode.Full)
config.Save()
Console.WriteLine("timeDelay: {0}", _
section.TimeDelay.ToString())
Catch e As System.Exception
Console.WriteLine(e.Message)
End Try
End Sub
End Class
The following is a configuration excerpt as 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"/>
</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 InfiniteTimeSpanConverter converts the String value "infinite" assigned to a configuration property to the standard infinite TimeSpan and vice versa. The infinite TimeSpan value is represented by the MaxValue enumeration value.
This converter is used with TimeSpan properties. An infinite value is persisted as the "infinite" string.
Constructors
| InfiniteTimeSpanConverter() |
Initializes a new instance of the InfiniteTimeSpanConverter 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) |
Returns a collection of properties for the type of array specified by the value parameter, using the specified context. (Inherited from TypeConverter) |
| 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(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) |
