DataSourceCacheDurationConverter Class

 

Provides a type converter to convert 32-bit signed integer objects to and from data source control cache duration representations.

Namespace:   System.Web.UI
Assembly:  System.Web (in System.Web.dll)

System.Object
  System.ComponentModel.TypeConverter
    System.ComponentModel.BaseNumberConverter
      System.ComponentModel.Int32Converter
        System.Web.UI.DataSourceCacheDurationConverter

public class DataSourceCacheDurationConverter : Int32Converter

NameDescription
System_CAPS_pubmethodDataSourceCacheDurationConverter()

Initializes a new instance of the DataSourceCacheDurationConverter class.

NameDescription
System_CAPS_pubmethodCanConvertFrom(ITypeDescriptorContext, Type)

Determines whether the DataSourceCacheDurationConverter can convert an object in the given source type to an Int32 object.(Overrides BaseNumberConverter.CanConvertFrom(ITypeDescriptorContext, Type).)

System_CAPS_pubmethodCanConvertFrom(Type)

Returns whether this converter can convert an object of the given type to the type of this converter.(Inherited from TypeConverter.)

System_CAPS_pubmethodCanConvertTo(ITypeDescriptorContext, Type)

Returns a value indicating whether the DataSourceCacheDurationConverter instance can convert an object to the given destination type.(Overrides BaseNumberConverter.CanConvertTo(ITypeDescriptorContext, Type).)

System_CAPS_pubmethodCanConvertTo(Type)

Returns whether this converter can convert the object to the specified type.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertFrom(ITypeDescriptorContext, CultureInfo, Object)

Converts the specified object to an Int32 object.(Overrides BaseNumberConverter.ConvertFrom(ITypeDescriptorContext, CultureInfo, Object).)

System_CAPS_pubmethodConvertFrom(Object)

Converts the given value to the type of this converter.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertFromInvariantString(ITypeDescriptorContext, String)

Converts the given string to the type of this converter, using the invariant culture and the specified context.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertFromInvariantString(String)

Converts the given string to the type of this converter, using the invariant culture.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertFromString(ITypeDescriptorContext, CultureInfo, String)

Converts the given text to an object, using the specified context and culture information.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertFromString(ITypeDescriptorContext, String)

Converts the given text to an object, using the specified context.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertFromString(String)

Converts the specified text to an object.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type)

Converts the specified object to another type.(Overrides BaseNumberConverter.ConvertTo(ITypeDescriptorContext, CultureInfo, Object, Type).)

System_CAPS_pubmethodConvertTo(Object, Type)

Converts the given value object to the specified type, using the arguments.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertToInvariantString(ITypeDescriptorContext, Object)

Converts the specified value to a culture-invariant string representation, using the specified context.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertToInvariantString(Object)

Converts the specified value to a culture-invariant string representation.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertToString(ITypeDescriptorContext, CultureInfo, Object)

Converts the given value to a string representation, using the specified context and culture information.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertToString(ITypeDescriptorContext, Object)

Converts the given value to a string representation, using the given context.(Inherited from TypeConverter.)

System_CAPS_pubmethodConvertToString(Object)

Converts the specified value to a string representation.(Inherited from TypeConverter.)

System_CAPS_pubmethodCreateInstance(IDictionary)

Re-creates an Object given a set of property values for the object.(Inherited from TypeConverter.)

System_CAPS_pubmethodCreateInstance(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.)

System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_protmethodGetConvertFromException(Object)

Returns an exception to throw when a conversion cannot be performed.(Inherited from TypeConverter.)

System_CAPS_protmethodGetConvertToException(Object, Type)

Returns an exception to throw when a conversion cannot be performed.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetCreateInstanceSupported()

Returns whether changing a value on this object requires a call to the CreateInstance method to create a new value.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetCreateInstanceSupported(ITypeDescriptorContext)

Returns whether changing a value on this object requires a call to CreateInstance to create a new value, using the specified context.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetProperties(ITypeDescriptorContext, Object)

Returns a collection of properties for the type of array specified by the value parameter, using the specified context.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetProperties(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.)

System_CAPS_pubmethodGetProperties(Object)

Returns a collection of properties for the type of array specified by the value parameter.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetPropertiesSupported()

Returns whether this object supports properties.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetPropertiesSupported(ITypeDescriptorContext)

Returns whether this object supports properties, using the specified context.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetStandardValues()

Returns a collection of standard values from the default context for the data type this type converter is designed for.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetStandardValues(ITypeDescriptorContext)

Returns a collection of standard values for the data type the DataSourceCacheDurationConverter instance is designed for.(Overrides TypeConverter.GetStandardValues(ITypeDescriptorContext).)

System_CAPS_pubmethodGetStandardValuesExclusive()

Returns whether the collection of standard values returned from GetStandardValues is an exclusive list.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetStandardValuesExclusive(ITypeDescriptorContext)

Specifies whether the collection of standard values returned from the GetStandardValues method is an exclusive list, using the specified context.(Overrides TypeConverter.GetStandardValuesExclusive(ITypeDescriptorContext).)

System_CAPS_pubmethodGetStandardValuesSupported()

Returns whether this object supports a standard set of values that can be picked from a list.(Inherited from TypeConverter.)

System_CAPS_pubmethodGetStandardValuesSupported(ITypeDescriptorContext)

Specifies whether the DataSourceCacheDurationConverter object supports a standard set of values that can be picked from a list, using the specified context.(Overrides TypeConverter.GetStandardValuesSupported(ITypeDescriptorContext).)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_pubmethodIsValid(ITypeDescriptorContext, Object)

Returns whether the given value object is valid for this type and for the specified context.(Inherited from TypeConverter.)

System_CAPS_pubmethodIsValid(Object)

Returns whether the given value object is valid for this type.(Inherited from TypeConverter.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_protmethodSortProperties(PropertyDescriptorCollection, String[])

Sorts a collection of properties.(Inherited from TypeConverter.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

ASP.NET data source controls that support caching typically provide a CacheDuration property that you can set to the number of seconds that the control caches data. The value 0 represents "Infinite" in these caching contexts, and the DataSourceCacheDurationConverter class takes care of this explicit conversion.

Page developers do not use the DataSourceCacheDurationConverter class. Control developers who are developing data source controls that support caching use this type converter along with the TypeConverterAttribute attribute to decorate a property that represents a cache duration setting of a custom data source control.

The following code example demonstrates how you can decorate a property on a data source control that supports caching with a TypeConverterAttribute attribute. In this example, the data source control supports caching semantics and exposes three properties modeled after other ASP.NET data source controls: EnableCaching, CacheDuration, and CacheExpirationPolicy. The CacheDuration property uses the DataSourceCacheDurationConverter type converter.

using System;
using System.ComponentModel;
using System.Web.UI;

[ NonVisualControl() ]
public class SomeDataSource : DataSourceControl
{
    // Implementation of a custom data source control.

    // The SdsCache object is an imaginary cache object
    // provided for this example. It has not actual 
    // implementation.
    private SdsCache m_sdsCache = new SdsCache();
    internal SdsCache Cache {
        get { return m_sdsCache; }
    }

    [TypeConverterAttribute(typeof(DataSourceCacheDurationConverter))]
    public int CacheDuration {
        get { return Cache.Duration; }
    }

    public DataSourceCacheExpiry CacheExpirationPolicy {
        get { return Cache.Expiry; }
        set { Cache.Expiry = value; }
    }

    public bool EnableCaching {
        get { return Cache.Enabled; }
        set { Cache.Enabled = value; }
    }

    protected override DataSourceView GetView(string viewName)
    {
        throw new Exception("The method or operation is not implemented.");
    }

    // ...
}

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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