在意外的ConfigurationProperty失败RegexStringValidator定制的ConfigurationElement

问题描述

我写我自己的自定义配置部分，并在的ConfigurationElement定义，像这样一个的ConfigurationProperty：

I am writing my own custom configuration section and have a ConfigurationProperty defined in a ConfigurationElement like so:

[ConfigurationProperty("startTime", IsRequired = false)]
[RegexStringValidator("\\d{2}:\\d{2}:\\d{2}")]
public string StartTime
{
    get
    {
        return (string) this["startTime"];
    }

    set
    {
        this["startTime"] = value;
    }
}

我期待着能够进入的值，如在我创建了的ConfigurationElement的属性的startTime23:30:00。但是，每当我尝试加载我的配置部分，我得到的消息是ConfigurationErrorsException：

I am expecting to be able to enter values such as "23:30:00" in the startTime attribute of the ConfigurationElement that I have created. However, whenever I try to load my configuration section, I get an ConfigurationErrorsException with the message:

有关财产的startTime'的值无效。错误是：值不符合验证正则表达式字符串'\d {2}：\d {2}：\d {2}。

我承认我总是用正则表达式挣扎，但是这一次是很简单，我写了一个测试，以验证我的模式应该验证该种我期待值：

I'll admit I always struggle with regular expressions, but this one is simple enough and I wrote a test to verify that my pattern should validate the kinds of values I am expecting:

var regex = new Regex(@"\d{2}:\d{2}:\d{2}", RegexOptions.Compiled);
var isSuccess = regex.Match("23:30:00").Success;

isSuccess计算结果为True，所以我不太清楚为什么ConfigurationErrorsException被抛出。

isSuccess evaluates to True, so I am not quite sure why the ConfigurationErrorsException is being thrown.

作为参考，这是我的配置节从我App.config文件：

As a reference, here is my configuration section from my App.config file:

<windowsServiceConfiguration>
  <schedule startTime = "23:00:00" />
</windowsServiceConfiguration>

任何帮助，为什么我不能得到RegexStringValidator工作将不胜感激。谢谢

Any help as to why I can't get the RegexStringValidator to work would be appreciated. Thanks.

推荐答案

尝试定义的默认值，将通过验证：

Try to define the default value that will pass the validation:

[ConfigurationProperty("startTime", IsRequired = false, DefaultValue = "00:00:00")]
[RegexStringValidator(@"\d{2}:\d{2}:\d{2}")]
public string StartTime
{
    get 
    {
        return (string) this["startTime"];
    }

    set
    {
        this["startTime"] = value;
    }
}

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