HttpApplicationState 类
定义
允许共享 ASP.NET 应用程序内多个会话和请求之间的全局信息。Enables sharing of global information across multiple sessions and requests within an ASP.NET application.
public ref class HttpApplicationState sealed : System::Collections::Specialized::NameObjectCollectionBasepublic sealed class HttpApplicationState : System.Collections.Specialized.NameObjectCollectionBasetype HttpApplicationState = class
inherit NameObjectCollectionBasePublic NotInheritable Class HttpApplicationState
Inherits NameObjectCollectionBase- 继承
注解
ASP.NET 应用程序是虚拟目录范围内的所有文件、页面、处理程序、模块和代码以及单个 Web 服务器上的子目录的总和。An ASP.NET application is the sum of all files, pages, handlers, modules, and code within the scope of a virtual directory and its subdirectories on a single Web server.
当 HttpApplicationState 客户端第一次请求特定 ASP.NET 应用程序虚拟目录内的任何 URL 资源时，将创建类的单个实例。A single instance of an HttpApplicationState class is created the first time a client requests any URL resource from within a particular ASP.NET application virtual directory. 为 Web 服务器上的每个 ASP.NET 应用程序创建一个单独的实例。A separate single instance is created for each ASP.NET application on a Web server. 然后，将通过内部对象公开对每个实例的引用 Application 。A reference to each instance is then exposed via the intrinsic Application object.
应用程序状态不会在 Web 场之间共享 (其中，应用程序托管在多个服务器上) 或 Web 园 (，其中应用程序托管在同一台计算机上的多个进程中) 。Application state is not shared across either a Web farm (in which an application is hosted across multiple servers) or a Web garden (in which an application is hosted across multiple processes on the same computer).
属性
| AllKeys |
获取 HttpApplicationState 集合中的访问键。Gets the access keys in the HttpApplicationState collection. |
| Contents |
获取对 HttpApplicationState 对象的引用。Gets a reference to the HttpApplicationState object. |
| Count |
获取 HttpApplicationState 集合中的对象数。Gets the number of objects in the HttpApplicationState collection. |
| IsReadOnly |
获取或设置一个值，通过该值指示 NameObjectCollectionBase 实例是否为只读的。Gets or sets a value indicating whether the NameObjectCollectionBase instance is read-only. (继承自 NameObjectCollectionBase) |
| Item[Int32] |
通过索引获取单个 HttpApplicationState 对象。Gets a single HttpApplicationState object by index. |
| Item[String] |
通过名称获取单个 HttpApplicationState 对象的值。Gets the value of a single HttpApplicationState object by name. |
| Keys |
获取包含 NameObjectCollectionBase.KeysCollection 实例中所有键的 NameObjectCollectionBase 实例。Gets a NameObjectCollectionBase.KeysCollection instance that contains all the keys in the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| StaticObjects |
获取由 |
方法
| Add(String, Object) |
将新的对象添加到 HttpApplicationState 集合中。Adds a new object to the HttpApplicationState collection. |
| BaseAdd(String, Object) |
将具有指定键和值的项添加到 NameObjectCollectionBase 实例中。Adds an entry with the specified key and value into the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseClear() |
移除 NameObjectCollectionBase 实例中的所有项。Removes all entries from the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseGet(Int32) |
获取 NameObjectCollectionBase 实例的指定索引处的项值。Gets the value of the entry at the specified index of the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseGet(String) |
获取 NameObjectCollectionBase 实例中第一个具有指定键的项值。Gets the value of the first entry with the specified key from the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseGetAllKeys() |
返回 String 数组，该数组包含 NameObjectCollectionBase 实例中的所有键。Returns a String array that contains all the keys in the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseGetAllValues() |
返回 Object 数组，该数组包含 NameObjectCollectionBase 实例中的所有值。Returns an Object array that contains all the values in the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseGetAllValues(Type) |
返回指定类型的数组，该数组包含 NameObjectCollectionBase 实例中的所有值。Returns an array of the specified type that contains all the values in the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseGetKey(Int32) |
获取 NameObjectCollectionBase 实例的指定索引处的项键。Gets the key of the entry at the specified index of the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseHasKeys() |
获取一个值，通过该值指示 NameObjectCollectionBase 实例是否包含键不为 |
| BaseRemove(String) |
移除 NameObjectCollectionBase 实例中具有指定键的项。Removes the entries with the specified key from the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseRemoveAt(Int32) |
移除 NameObjectCollectionBase 实例的指定索引处的项。Removes the entry at the specified index of the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseSet(Int32, Object) |
设置 NameObjectCollectionBase 实例的指定索引处的项值。Sets the value of the entry at the specified index of the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| BaseSet(String, Object) |
为 NameObjectCollectionBase 实例中第一个具有指定键的项设置值（如果有这样的项）；否则将具有指定键和值的项添加到 NameObjectCollectionBase 实例中。Sets the value of the first entry with the specified key in the NameObjectCollectionBase instance, if found; otherwise, adds an entry with the specified key and value into the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| Clear() |
从 HttpApplicationState 集合中移除所有对象。Removes all objects from an HttpApplicationState collection. |
| Equals(Object) |
确定指定对象是否等于当前对象。Determines whether the specified object is equal to the current object. (继承自 Object) |
| Get(Int32) |
通过数字索引获取 HttpApplicationState 对象。Gets an HttpApplicationState object by numerical index. |
| Get(String) |
按名称获取 HttpApplicationState 对象。Gets an HttpApplicationState object by name. |
| GetEnumerator() |
返回循环访问 NameObjectCollectionBase 的枚举数。Returns an enumerator that iterates through the NameObjectCollectionBase. (继承自 NameObjectCollectionBase) |
| GetHashCode() |
作为默认哈希函数。Serves as the default hash function. (继承自 Object) |
| GetKey(Int32) |
通过索引获取 HttpApplicationState 对象名。Gets an HttpApplicationState object name by index. |
| GetObjectData(SerializationInfo, StreamingContext) |
实现 ISerializable 接口，并返回序列化 NameObjectCollectionBase 实例所需的数据。Implements the ISerializable interface and returns the data needed to serialize the NameObjectCollectionBase instance. (继承自 NameObjectCollectionBase) |
| GetType() |
获取当前实例的 Type。Gets the Type of the current instance. (继承自 Object) |
| Lock() |
锁定对 HttpApplicationState 变量的访问以促进访问同步。Locks access to an HttpApplicationState variable to facilitate access synchronization. |
| MemberwiseClone() |
创建当前 Object 的浅表副本。Creates a shallow copy of the current Object. (继承自 Object) |
| OnDeserialization(Object) |
实现 ISerializable 接口，并在完成反序列化之后引发反序列化事件。Implements the ISerializable interface and raises the deserialization event when the deserialization is complete. (继承自 NameObjectCollectionBase) |
| Remove(String) |
从 HttpApplicationState 集合中移除命名对象。Removes the named object from an HttpApplicationState collection. |
| RemoveAll() |
从 HttpApplicationState 集合中移除所有对象。Removes all objects from an HttpApplicationState collection. |
| RemoveAt(Int32) |
按索引从集合中移除一个 HttpApplicationState 对象。Removes an HttpApplicationState object from a collection by index. |
| Set(String, Object) |
更新 HttpApplicationState 集合中的对象值。Updates the value of an object in an HttpApplicationState collection. |
| ToString() |
返回表示当前对象的字符串。Returns a string that represents the current object. (继承自 Object) |
| UnLock() |
取消锁定对 HttpApplicationState 变量的访问以促进访问同步。Unlocks access to an HttpApplicationState variable to facilitate access synchronization. |
显式接口实现
| ICollection.CopyTo(Array, Int32) |
从目标数组的指定索引处开始将整个 NameObjectCollectionBase 复制到兼容的一维 Array。Copies the entire NameObjectCollectionBase to a compatible one-dimensional Array, starting at the specified index of the target array. (继承自 NameObjectCollectionBase) |
| ICollection.IsSynchronized |
获取一个值，该值指示对 NameObjectCollectionBase 对象的访问是否同步（线程安全）。Gets a value indicating whether access to the NameObjectCollectionBase object is synchronized (thread safe). (继承自 NameObjectCollectionBase) |
| ICollection.SyncRoot |
获取一个对象，该对象可用于同步对 NameObjectCollectionBase 对象的访问。Gets an object that can be used to synchronize access to the NameObjectCollectionBase object. (继承自 NameObjectCollectionBase) |
扩展方法
| Cast<TResult>(IEnumerable) |
将 IEnumerable 的元素强制转换为指定的类型。Casts the elements of an IEnumerable to the specified type. |
| OfType<TResult>(IEnumerable) |
根据指定类型筛选 IEnumerable 的元素。Filters the elements of an IEnumerable based on a specified type. |
| AsParallel(IEnumerable) |
启用查询的并行化。Enables parallelization of a query. |
| AsQueryable(IEnumerable) |
将 IEnumerable 转换为 IQueryable。Converts an IEnumerable to an IQueryable. |
适用于
线程安全性
此类型是线程安全的。This type is thread safe.