InfiniteAbsoluteExpiration Property

Visual Basic
C#
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Shared ReadOnly Property InfiniteAbsoluteExpiration As System.DateTimeOffset

'Usage
 
Dim value As System.DateTimeOffset
 
value = SmartCache.InfiniteAbsoluteExpiration

public static System.DateTimeOffset InfiniteAbsoluteExpiration {get;}

public: __property static System.DateTimeOffset get_InfiniteAbsoluteExpiration();

public:
static property System.DateTimeOffset InfiniteAbsoluteExpiration {
   System.DateTimeOffset get();
}

Property Value

A date-time value that is set to the maximum possible value.

C#

//Create a Primary Memory Cache with a backing File Cache
string directory = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "KellermanSoftware", "NetCachingLibrary", "Tests");
SmartConfig config = new SmartConfig(new MemoryCacheProvider(), new FileCacheProvider(directory));
            
//Specify UserName and LicenseKey for Licensed Mode
//config.UserName = "my user name";
//config.LicenseKey = "my license key";
            
//Instantiate the cache
SmartCache cache = new SmartCache(config);
            
//Build parameters for the report
int month = DateTime.Now.Month;
int year = DateTime.Now.Year;
            
//Get the cache key based on the report parameters
//The get cache key method uses reflection to ensure uniqueness
string cacheKey = cache.BuildCacheKey("MonthlySalesReport", month, year);
            
//Attempt to load the report from the cache
List<ReportDetail> report = cache.Get<List<ReportDetail>>(cacheKey);
            
//Not found in the cache
if (report == null)
{
	//Load the report from the database
	report = ReportLogic.MonthlySalesReport(month, year);
            
	CacheItem item = new CacheItem(cacheKey, report, "Default");
            
	//Expire if it has not been used in a sliding 5 minutes with an InfiniteAbsoluteExpiration
	CacheItemPolicy policy = new CacheItemPolicy()
	{
		AbsoluteExpiration = SmartCache.InfiniteAbsoluteExpiration,
		SlidingExpiration = new TimeSpan(0, 5, 0)
	};
            
	//Save to the cache using the same expiration policy for the memory cache and file cache
	bool result = cache.Add<string>(item, policy);
            
	//This will be true since it was added to the cache
	Console.WriteLine(result);
}

VB.NET

'Create a Primary Memory Cache with a backing File Cache
Dim directory As String = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "KellermanSoftware", "NetCachingLibrary", "Tests")
Dim config As New SmartConfig(New MemoryCacheProvider(), New FileCacheProvider(directory))
            
'Specify UserName and LicenseKey for Licensed Mode
'config.UserName = "my user name";
'config.LicenseKey = "my license key";
            
'Instantiate the cache
Dim cache As New SmartCache(config)
            
'Build parameters for the report
Dim month As Integer = Date.Now.Month
Dim year As Integer = Date.Now.Year
            
'Get the cache key based on the report parameters
'The get cache key method uses reflection to ensure uniqueness
Dim cacheKey As String = cache.BuildCacheKey("MonthlySalesReport", month, year)
            
'Attempt to load the report from the cache
Dim report As List(Of ReportDetail) = cache.Get(Of List(Of ReportDetail))(cacheKey)
            
'Not found in the cache
If report Is Nothing Then
	'Load the report from the database
	report = ReportLogic.MonthlySalesReport(month, year)
            
	Dim item As New CacheItem(cacheKey, report, "Default")
            
	'Expire if it has not been used in a sliding 5 minutes with an InfiniteAbsoluteExpiration
	Dim policy As New CacheItemPolicy() With {
		.AbsoluteExpiration = SmartCache.InfiniteAbsoluteExpiration,
		.SlidingExpiration = New TimeSpan(0, 5, 0)
	}
            
	'Save to the cache using the same expiration policy for the memory cache and file cache
	Dim result As Boolean = cache.Add(Of String)(item, policy)
            
	'This will be true since it was added to the cache
	Console.WriteLine(result)
End If

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

SmartCache Class
SmartCache Members