我可以在自定义ConfigurationSection上使用IntegerValidator属性指定范围吗? [英] Can I specify a range with the IntegerValidator attribute on a custom ConfigurationSection?

问题描述

我有一个包含以下ConfigurationSection :

namespace DummyConsole {
  class TestingComponentSettings: ConfigurationSection {

    [ConfigurationProperty("waitForTimeSeconds", IsRequired=true)]
    [IntegerValidator(MinValue = 1, MaxValue = 100, ExcludeRange = false)]
    public int WaitForTimeSeconds
    {
        get { return (int)this["waitForTimeSeconds"]; }
        set { this["waitForTimeSeconds"] = value; }
    }

    [ConfigurationProperty("loginPage", IsRequired = true, IsKey=false)]
    public string LoginPage
    {
        get { return (string)this["loginPage"]; }
        set { this["loginPage"] = value; }
    }
  }
}

然后，我的.config文件中包含以下内容:

I then have the following in my .config file:

<configSections>
  <section name="TestingComponentSettings" 
           type="DummyConsole.TestingComponentSettings, DummyConsole"/>
</configSections>
<TestingComponentSettings waitForTimeSeconds="20" loginPage="myPage" />

当我尝试使用此配置部分时，出现以下错误:

When I then attempt to use this configuration section I get the following error:

var Testing = ConfigurationManager.GetSection("TestingComponentSettings")
             as TestingComponentSettings;

ConfigurationErrorsException未处理

属性"waitForTimeSeconds"的值无效.错误是:该值必须在1-100的范围内.

The value for the property 'waitForTimeSeconds' is not valid. The error is: The value must be inside the range 1-100.

如果将 IntegerValidator 更改为ExcludeRage = true，我(显然)得到:

If I change the IntegerValidator to have an ExcludeRage = true, I (obviously) get:

ConfigurationErrorsException未处理

属性"waitForTimeSeconds"的值无效.错误是:该值不能在1-100范围内

The value for the property 'waitForTimeSeconds' is not valid. The error is: The value must not be in the range 1-100

如果我然后将.config中的属性值更改为大于100的数字，则它可以正常工作.

If I then change the value of the property in the .config to a number higher than 100, it works.

如果我更改验证器的 MaxValue 为100，则它可以工作，但也将接受值-1.

If I change the validator to just have a MaxValue of 100 it works, but will also accept a value of -1.

是否可以在这样的范围内使用 IntegerValidatorAttribute ?

Is it possible to use the IntegerValidatorAttribute with a range like this?

编辑以添加

由Microsoft确认为问题.

Confirmed as an issue by Microsoft.

推荐答案

Skrud 指出，MS已更新了连接问题:

As Skrud points out, MS have updated the connect issue:

报告的问题是由于配置系统如何处理验证程序而引起的.每个数字配置属性都有一个默认值-即使未指定.如果未指定默认值，则使用值0.在此示例中，配置属性以默认值结束，该默认值不在整数验证器指定的有效范围内.结果，配置解析总是失败.

The reported issue is because of a quirk in how the configuration system handles validators. Each numeric configuration property has a default value - even if one is not specified. When a default is not specified the value 0 is used. In this example the configuration property ends up with a default value that is not in the valid range specified by the integer validator. As a result configuration parsing always fails.

要解决此问题，请更改配置属性定义以包括1到100范围内的默认值:

To fix this, change the configuration property definition to include a default value that is within the range of 1 to 100:

[ConfigurationProperty("waitForTimeSeconds", IsRequired=true, 
                       DefaultValue="10")]

这确实意味着该属性将具有默认值，但是我实际上并不认为这是一个主要问题-我们是说它的值应该在合理的"范围内，并且应该准备好设置合理的默认值.

This does mean that the property will have a default, but I don't actually see that as a major issue - we're saying that it should have a value that falls within a "sensible" range, and should be prepared to set a sensible default.

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