ReleaseInstanceMode 枚举
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
指定系统在操作调用进程中回收服务对象的时间。
public enum class ReleaseInstanceModepublic enum ReleaseInstanceModetype ReleaseInstanceMode = Public Enum ReleaseInstanceMode- 继承
字段
| 名称 | 值 | 说明 |
|---|---|---|
| AfterCall | 2 | 在完成操作后回收对象。 |
| BeforeAndAfterCall | 3 | 在调用操作前和完成操作后回收对象。 |
| BeforeCall | 1 | 在调用操作前回收对象。 |
| None | 0 | 根据 InstanceContextMode 值回收对象。 |
示例
下面的代码示例演示如何使用 ReleaseInstanceMode 在调用之前和之后均回收服务对象。
class SampleService : ISampleService
{
private Guid id;
private string session;
public SampleService()
{
id = Guid.NewGuid();
session = OperationContext.Current.SessionId;
Console.WriteLine("Object {0} has been created.", id);
Console.WriteLine("For session {0}", session);
}
[OperationBehavior(
ReleaseInstanceMode=ReleaseInstanceMode.BeforeAndAfterCall
)]
public string SampleMethod(string msg)
{
Console.WriteLine("The caller said: \"{0}\"", msg);
Console.WriteLine("For session {0}", OperationContext.Current.SessionId);
return "The service greets you: " + msg;
}
~SampleService()
{
Console.WriteLine("Object {0} has been destroyed.", id);
Console.WriteLine("For session {0}", session);
}
}
Friend Class SampleService
Implements ISampleService
Private id As Guid
Private session As String
Public Sub New()
id = Guid.NewGuid()
session = OperationContext.Current.SessionId
Console.WriteLine("Object {0} has been created.", id)
Console.WriteLine("For session {0}", session)
End Sub
<OperationBehavior(ReleaseInstanceMode:=ReleaseInstanceMode.BeforeAndAfterCall)> _
Public Function SampleMethod(ByVal msg As String) As String Implements ISampleService.SampleMethod
Console.WriteLine("The caller said: ""{0}""", msg)
Console.WriteLine("For session {0}", OperationContext.Current.SessionId)
Return "The service greets you: " & msg
End Function
Protected Overrides Sub Finalize()
Console.WriteLine("Object {0} has been destroyed.", id)
Console.WriteLine("For session {0}", session)
End Sub
End Class
注解
ReleaseInstanceMode将 与 属性一起使用ReleaseInstanceMode可通知 Windows Communication Foundation (WCF) 必须在调用过程中的特定点回收当前服务对象。 默认行为是根据 InstanceContextMode 值来回收服务对象。
