App.Config 自定义配置部分问题答案

【问题标题】：App.Config Custom configuration section problemApp.Config 自定义配置部分问题
【发布时间】：2011-05-25 02:12:59
【问题描述】：

我为我的应用程序创建了一个自定义配置部分。出于某种原因，Visual Studio 2010 没有使用我的自定义属性。对于所有“添加”键，我都会收到与此类似的警告：

Could not find schema information for the element 'urlFilterSection'

配置文件：

<configSections>
    <section name="urlFilterSection" type="BotFinderApp.Models.UrlFilterSection, BotFinder" />
</configSections>

<urlFilterSection>
    <urlFilterCollection>
        <add url="urlhere.com.au" numberOfIpsToExtract="10" />
        <add url="urlhere.com.au" numberOfIpsToExtract="10" />
        <add url="urlhere.com.au" numberOfIpsToExtract="10" />
        <add url="urlhere.com.au" numberOfIpsToExtract="10" />
        <add url="urlhere.com.au" numberOfIpsToExtract="10" />
        <add url="urlhere.com.au" numberOfIpsToExtract="10" />
        <add url="urlhere.com.au" numberOfIpsToExtract="10" />
        <add url="urlhere.com.au" numberOfIpsToExtract="10" />
        <add url="urlhere.com.au" numberOfIpsToExtract="10" />
    </urlFilterCollection>
</urlFilterSection>

UrlFilterSection：

namespace BotFinderApp.Models
{
    public class UrlFilterSection : ConfigurationSection
    {
        public UrlFilterSection()
        {    
        }

        [ConfigurationProperty("urlFilterCollection", IsDefaultCollection = false)]
        [ConfigurationCollection(typeof(UrlFilterCollection), AddItemName = "add", ClearItemsName = "clear", RemoveItemName = "remove")]
        public UrlFilterCollection Urls
        {
            get
            {
                var urlsCollection = (UrlFilterCollection)base["urlFilterCollection"];
                return urlsCollection;
            }
        }
    }
}

UrlFilterCollection

namespace BotFinderApp.Models
{
    public class UrlFilterCollection : ConfigurationElementCollection
    {
        public UrlFilterCollection()
        {
        }

        protected override ConfigurationElement CreateNewElement()
        {
            return new UrlFilter();
        }

        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((UrlFilter)element).Url;
        }
    }
}

网址过滤器

namespace BotFinderApp.Models
{
    public class UrlFilter : ConfigurationElement
    {
        public UrlFilter()
        {
        }

        [ConfigurationProperty("url", DefaultValue = "", IsRequired = true)]
        public string Url
        {
            get { return (string)this["url"]; }
            set { this["url"] = value; }
        }

        [ConfigurationProperty("numberOfIpsToExtract", DefaultValue = "0", IsRequired = true)]
        public int NumberOfIpsToExtract
        {
            get { return (int)this["numberOfIpsToExtract"]; }
            set { this["numberOfIpsToExtract"] = value; }
        }
    }
}

【问题讨论】：

你能在你的应用程序中使用它吗？我的意思是，它只是编译时警告还是你甚至不能在你的应用程序中使用它？
UrlFilterCollection serviceConfigSection = ConfigurationManager.GetSection("urlFilterSection") as UrlFilterCollection;返回 null...

标签： c# asp.net configuration app-config configuration-files

【解决方案1】：

发现问题：

Decyclone 是正确的，错误实际上只是编译时警告。

真正的问题是我像这样访问我的配置：

UrlFilterCollection serviceConfigSection = ConfigurationManager.GetSection("urlFilterSection") as UrlFilterCollection;

什么时候应该是这样的

UrlFilterSection serviceConfigSection = ConfigurationManager.GetSection("urlFilterSection") as UrlFilterSection;

谢谢 FlipScript 和 Decyclone :)

更新：

我发现了如何删除编译时警告 - 我使用的是 Visual Studio 2010。创建自定义配置部分后，我使用了工具栏中的“创建架构”按钮，该按钮为配置生成架构文件。然后我将其保存到我的项目中，警告消失了。

【讨论】：