Cache.NoAbsoluteExpiration 字段

定义

用于 Insert(String, Object) 方法调用中的 absoluteExpiration 参数中以指示项从不到期。Used in the absoluteExpiration parameter in an Insert(String, Object) method call to indicate the item should never expire. 此字段为只读。This field is read-only.

public: static initonly DateTime NoAbsoluteExpiration;
public static readonly DateTime NoAbsoluteExpiration;
 staticval mutable NoAbsoluteExpiration : DateTime
Public Shared ReadOnly NoAbsoluteExpiration As DateTime 

字段值

示例

下面的示例演示如何使用NoAbsoluteExpiration字段Cache在中插入项时禁用绝对过期。The following example demonstrates how to use the NoAbsoluteExpiration field to disable absolute expirations when inserting an item in the Cache.

Cache.Insert("DSN", connectionString, null, System.Web.Caching.Cache.NoAbsoluteExpiration, TimeSpan.FromSeconds(10));

Cache.Insert("DSN", connectionString, Nothing, System.Web.Caching.Cache.NoAbsoluteExpiration, TimeSpan.FromSeconds(10))

注解

使用时, 此字段将absoluteExpiration参数设置为MaxValue等于, 这是表示最大可能DateTime值 12/31/9999 11:59:59 PM 的常数。When used, this field sets the absoluteExpiration parameter equal to MaxValue, which is a constant representing the largest possible DateTime value, 12/31/9999 11:59:59 PM.

适用于

另请参阅