底层连接已关闭：连接意外关闭

发布于 2024-08-09 15:33:36 字数 706 浏览 3 评论 0原文

当多次使用WCF时，异常按摩并不能帮助我们解决问题问题。上述消息通常是以下问题之一的症状：

返回值大于配置文件中定义的值。
端点设置有问题
数据序列化有问题

我遇到的第三个问题与枚举有关问题是枚举是用值显式定义的

  Public Enum FrequencyEnums
        EveryTime = 1
        OncePerHour = 2
        OncePerDay = 3
        OncePerWeek = 4
        Never = 5
    End Enum

并且使用该枚举的私有属性定义如下

Private m_sendFrequencyID As FrequencyEnums

现在因为枚举没有默认值的定义并且因为该属性没有显式初始化并且因为枚举中缺少 0 的枚举值，并且因为无论指定的选项如何，enum 的默认值始终为 0 当我尝试将此类的实例返回给客户端时，出现以下错误：基础连接已关闭：连接意外关闭

解决方案是以下方法之一：

为枚举定义 0 值或
根据枚举值为属性定义默认值。
为属性分配初始值

我的问题是如何使用 Microsoft 工具而不是通过反复试验发现此错误？

原文

When working with WCF many times the exception massage doesn’t help us to solve the
problem. The above massage is usually a symptom for one of the following problems:

The return values are bigger than the value which was defined in the config file.
There is a problem with the endpoint setting
There is a problem with serialization of the data

I experienced the 3rd problem which was with enums
The problem was that the an enum was defined explicitly with values

  Public Enum FrequencyEnums
        EveryTime = 1
        OncePerHour = 2
        OncePerDay = 3
        OncePerWeek = 4
        Never = 5
    End Enum

And the private property that was using this enum was defined as follows

Private m_sendFrequencyID As FrequencyEnums

Now because the enum does not have a definition of a default value and
because the property is not initialized explicitly and
because the enum value for 0 is missing from the enum and
because the default value of enum regardless of the specified options is always 0
When I tried to return instance of this class to the client I got this error:
The underlying connection was closed: The connection was closed unexpectedly

The solution is one of the following: