2

我有自定义配置部分，例如

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <section name="DBConfiguration" type="NewSQLExecuter.DBConfigurationSection, NewSQLExecuter"/>
    </configSections>

    <DBConfiguration>
        <Items>
            <add servername="192.168.50.2\db1" dbname="test1" userid="sa" password="2222m@n" countrycode="GB" />
            <add servername="192.168.60.2\db2" dbname="test2" userid="sa" password="22222n" countrycode="US" />
            <add servername="192.168.70.2\db3" dbname="test3" userid="sa" password="3333" countrycode="DE" />
        </Items>
    </DBConfiguration>

</configuration>

我编写了一个从自定义配置部分读取数据的类...类代码如下。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;

namespace NewSQLExecuter
{

    public class DBConfigurationSection : ConfigurationSection
    {
        [ConfigurationProperty("Items")]
        public ItemsCollection Items
        {
            get { return ((ItemsCollection)(base["Items"])); }
        }
    }

    [ConfigurationCollection(typeof(ItemsElement))]
    public class ItemsCollection : ConfigurationElementCollection
    {
        protected override ConfigurationElement CreateNewElement()
        {
            return new ItemsElement();
        }

        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((ItemsElement)(element)).CountryCode;
        }

        public ItemsElement this[int idx]
        {
            get
            {
                return (ItemsElement)BaseGet(idx);
            }
        }
    }

    public class ItemsElement : ConfigurationElement
    {
        [ConfigurationProperty("servername", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string ServerName
        {
            get
            {
                return ((string)(base["servername"]));
            }
            set
            {
                base["servername"] = value;
            }
        }

        [ConfigurationProperty("dbname", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string DBName
        {
            get
            {
                return ((string)(base["dbname"]));
            }
            set
            {
                base["dbname"] = value;
            }
        }

        [ConfigurationProperty("userid", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string UserID
        {
            get
            {
                return ((string)(base["userid"]));
            }
            set
            {
                base["userid"] = value;
            }
        }

        [ConfigurationProperty("password", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string Password
        {
            get
            {
                return ((string)(base["password"]));
            }
            set
            {
                base["password"] = value;
            }
        }

        [ConfigurationProperty("countrycode", DefaultValue = "", IsKey = true, IsRequired = true)]
        public string CountryCode
        {
            get
            {
                return ((string)(base["countrycode"]));
            }
            set
            {
                base["countrycode"] = value;
            }
        }
    }
}

这样我迭代自定义配置数据并获取值

DBConfigurationSection section = (DBConfigurationSection)ConfigurationManager.GetSection("DBConfiguration");

if (section != null)
{
    DateTime satrt = DateTime.Now;

    for (int i = 0; i <= section.Items.Count - 1; i++)
    {
        var country = section.Items[i].CountryCode; ;
        var constring = string.Format("{0}{1}{2}{3}", "UID=" + section.Items[i].UserID, ";PWD=" + section.Items[i].Password, 
                                    ";Server=" + section.Items[i].ServerName, ";Database=" + section.Items[i].DBName); 
        dicList.Add(country, constring);
    }
}

代码工作正常，但我想再添加一个功能，比如通过任何键值搜索任何配置数据，比如

if(section.key.userid=="joy")
{
    string pwd=section.key.password
}

因此，请指导我如何将搜索功能添加到我的课程中。如果我可以使用 LINQ 搜索任何自定义配置数据，那就太好了。所以请指导我谢谢。

处理 app.config 文件中的两个自定义配置部分时出错

我的 app.config 文件看起来像

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <configSections>
        <section name="DBConfiguration" type="CSRAssistant.DBConfigurationSection, CSRAssistant"/>
        <section name="LoginConfiguration" type="CSRAssistant.LoginConfigurationSection, CSRAssistant"/>
    </configSections>

    <DBConfiguration>
        <add servername="dbname" dbname="BBAJobBoardForGB" userid="sa" password="222" countrycode="GBR" />
        <add servername="db2" dbname="BBAJobBoardForUS" userid="sa" password="swww" countrycode="USA" />

    </DBConfiguration>

    <LoginConfiguration>
        <add UserName="ww" Pwd="ww" Country="GBR"/>
        <add UserName="ss" Pwd="ss"  Country="USA"/>
        <add UserName="dd" Pwd="dd"  Country="CAD"/>
    </LoginConfiguration>
    <appSettings>
        <add key="MailID" value="tridip@bba-reman.com" />
    </appSettings>

    <startup useLegacyV2RuntimeActivationPolicy="true">
        <supportedRuntime version="v4.0"/>
        <requiredRuntime version="v4.0.20506"/>
    </startup>

</configuration>

处理两个部分我的代码如下

namespace CSRAssistant
{

    public class DBConfigurationSection : ConfigurationSection
    {
        //[ConfigurationProperty("Items")]
        //public ItemsCollection Items
        //{
        //    get { return ((ItemsCollection)(base["Items"])); }
        //}

        [ConfigurationProperty("", IsDefaultCollection = true)]
        public ItemsCollection Items 
        { 
            get 
            { 
                return ((ItemsCollection)(base[""])); 
            } 
        }
    }

    [ConfigurationCollection(typeof(ItemsElement))]
    public class ItemsCollection : ConfigurationElementCollection
    {
        protected override ConfigurationElement CreateNewElement()
        {
            return new ItemsElement();
        }

        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((ItemsElement)(element)).CountryCode;
        }

        public ItemsElement this[int idx]
        {
            get
            {
                return (ItemsElement)BaseGet(idx);
            }
        }
    }

    public class ItemsElement : ConfigurationElement
    {
        [ConfigurationProperty("servername", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string ServerName
        {
            get
            {
                return ((string)(base["servername"]));
            }
            set
            {
                base["servername"] = value;
            }
        }

        [ConfigurationProperty("dbname", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string DBName
        {
            get
            {
                return ((string)(base["dbname"]));
            }
            set
            {
                base["dbname"] = value;
            }
        }

        [ConfigurationProperty("userid", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string UserID
        {
            get
            {
                return ((string)(base["userid"]));
            }
            set
            {
                base["userid"] = value;
            }
        }

        [ConfigurationProperty("password", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string Password
        {
            get
            {
                return ((string)(base["password"]));
            }
            set
            {
                base["password"] = value;
            }
        }

        [ConfigurationProperty("countrycode", DefaultValue = "", IsKey = true, IsRequired = true)]
        public string CountryCode
        {
            get
            {
                return ((string)(base["countrycode"]));
            }
            set
            {
                base["countrycode"] = value;
            }
        }
    }

    public class LoginConfigurationSection : ConfigurationSection
    {
        //[ConfigurationProperty("Items")]
        //public ItemsCollection Items
        //{
        //    get { return ((ItemsCollection)(base["Items"])); }
        //}

        [ConfigurationProperty("", IsDefaultCollection = true)]
        public ItemsCollection Items
        {
            get
            {
                return ((ItemsCollection)(base[""]));
            }
        }
    }


    public class LoginElement : ConfigurationElement
    {
        [ConfigurationProperty("UserName", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string UserName
        {
            get
            {
                return ((string)(base["UserName"]));
            }
            set
            {
                base["UserName"] = value;
            }
        }

        [ConfigurationProperty("Pwd", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string Pwd
        {
            get
            {
                return ((string)(base["Pwd"]));
            }
            set
            {
                base["Pwd"] = value;
            }
        }

        [ConfigurationProperty("Country", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string Country
        {
            get
            {
                return ((string)(base["Country"]));
            }
            set
            {
                base["Country"] = value;
            }
        }

    }
}

像这样读取两个自定义配置设置

string joyPassword = "";
            LoginConfigurationSection LoginConfigurationSection = (LoginConfigurationSection)ConfigurationManager.GetSection("LoginConfiguration");
            if (LoginConfigurationSection != null)
            {
                var UserCredentials = LoginConfigurationSection.Items
                                    .Cast<LoginElement>()
                                    .FirstOrDefault(_element => _element.UserName == "razi");

                if (UserCredentials != null)
                    joyPassword = UserCredentials.Country;



                DBConfigurationSection section = (DBConfigurationSection)ConfigurationManager.GetSection("DBConfiguration");
                if (section != null)
                {
                    var DbConnection = section.Items
                                        .Cast<ItemsElement>()
                                        .FirstOrDefault(_element => _element.CountryCode.ToUpper() == joyPassword.ToUpper());

                    if (DbConnection != null)
                        joyPassword = DbConnection.ServerName;
                }
            }

现在我在运行时遇到错误 无法识别的属性“用户名”。请注意，属性名称区分大小写。

为什么无法识别的属性“用户名”只是不明白....如果可能，请指导我。谢谢

4

2 回答 2

3

你可能只是做这样的事情：

var joyUserElement = section.Items
    .Cast<ItemsElement>()
    .FirstOrDefault(_element => _element.UserID == "joy");

if (joyUserElement != null)
    string joyPassword = joyUserElement.Password;

你能理解这个吗？我可能在这里遗漏了一些东西，因为这没有经过测试，但它应该可以正常工作。

我看到你也在使用普通的for而不是foreach那里。请记住，集合是IEnumerable，因此您可以只使用foreach带有显式类型的 a ，如下所示：

foreach(ItemElement element in section.Items)

我还想补充两点：

  • 我建议您重命名元素类以反映它的实际含义，例如，DbConfigurationElement而不是ItemElement. 从长远来看，这将使代码更加清晰。

  • <Items>如果没有特殊含义（似乎是这种情况），您可以在 xml 中“隐藏”标签。如果您像这样注释您的集合属性

.

[ConfigurationProperty("", IsDefaultCollection = true)]
public ItemsCollection Items
{
    get { return ((ItemsCollection)(base[""])); }
}

然后你可以这样写你的部分：

<DBConfiguration>
    <add servername="192.168.50.2\db1" dbname="test1" userid="sa" password="2222m@n" countrycode="GB" />
    <add servername="192.168.60.2\db2" dbname="test2" userid="sa" password="22222n" countrycode="US" />
    <add servername="192.168.70.2\db3" dbname="test3" userid="sa" password="3333" countrycode="DE" />
</DBConfiguration>

这对于像您这样的小型单一集合配置部分非常有用。

于 2014-02-05T14:04:31.807 回答
0

嗨，这样你就可以做到。

    <?xml version="1.0" encoding="utf-8" ?>
    <configuration>
      <configSections>
        <section name="DBConfiguration" type="CSRAssistant.DBConfigurationSection, CSRAssistant"/>
        <section name="LoginConfiguration" type="CSRAssistant.LoginConfigurationSection, CSRAssistant"/>
      </configSections>

      <DBConfiguration>
        <add servername="192.168.88.2\bbareman" dbname="BBAJobBoardForGB" userid="sa" password="8B@R5m@n" countrycode="GBR" />
        <add servername="192.168.1.2\bbareman" dbname="BBAJobBoardForUS" userid="sa" password="8B@R5m@n" countrycode="USA" />
        <add servername="192.168.2.2\bbareman" dbname="BBAJobBoardForDE" userid="sa" password="8B@R5m@n" countrycode="DEU" />
        <add servername="192.168.77.10\bbareman" dbname="BBAJobBoardForFR" userid="sa" password="8B@R5m@n" countrycode="FRA" />
        <add servername="192.168.3.2\bbareman" dbname="BBAJobBoardForIT" userid="sa" password="8B@R5m@n" countrycode="ITA" />
        <add servername="192.168.4.2\bbareman" dbname="BBAJobBoardForCA" userid="sa" password="8B@R5m@n" countrycode="CAD" />
        <add servername="192.168.55.10\bbareman" dbname="BBAJobBoardForES" userid="sa" password="8B@R5m@n" countrycode="ESP" />
      </DBConfiguration>

      <LoginConfiguration>
        <add ID="1" UserName="suanguite" Pwd="gguite" Country="GBR"/>
        <add ID="2" UserName="sujoy" Pwd="sujoyUS"  Country="USA"/>
        <add ID="3" UserName="sujoy" Pwd="sujoyCA"  Country="CAD"/>
        <add ID="4" UserName="pjasu" Pwd="pjasuDE"  Country="DEU"/>
        <add ID="5" UserName="kankana" Pwd="kankana123"  Country="ITA"/>
        <add ID="6" UserName="test" Pwd="test"  Country="IND"/>
        <add ID="7" UserName="biswajit" Pwd="biswajitES"  Country="ESP"/>
        <add ID="8" UserName="suparna" Pwd="suparna"  Country="CAD"/>
        <add ID="9" UserName="razi" Pwd="raziFR"  Country="FRA"/>
        <add ID="10" UserName="tridip" Pwd="tridip"  Country="GBR"/>
        <add ID="11" UserName="tridip" Pwd="tridip"  Country="ESP"/>
        <add ID="12" UserName="tridip" Pwd="tridip"  Country="FRA"/>
      </LoginConfiguration>
      <appSettings>
        <add key="MailID" value="tridip@bba-reman.com" />
      </appSettings>

      <startup useLegacyV2RuntimeActivationPolicy="true">
        <supportedRuntime version="v4.0"/>
        <requiredRuntime version="v4.0.20506"/>
      </startup>

    </configuration>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;

namespace CSRAssistant
{
    public class DBConfigurationSection : ConfigurationSection
    {
        //[ConfigurationProperty("Items")]
        //public ItemsCollection Items
        //{
        //    get { return ((ItemsCollection)(base["Items"])); }
        //}

        [ConfigurationProperty("", IsDefaultCollection = true)]
        public ItemsCollection Items
        {
            get
            {
                return ((ItemsCollection)(base[""]));
            }
        }
    }

    [ConfigurationCollection(typeof(ItemsElement))]
    public class ItemsCollection : ConfigurationElementCollection
    {
        protected override ConfigurationElement CreateNewElement()
        {
            return new ItemsElement();
        }

        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((ItemsElement)(element)).CountryCode;
        }

        public ItemsElement this[int idx]
        {
            get
            {
                return (ItemsElement)BaseGet(idx);
            }
        }
    }

    public class ItemsElement : ConfigurationElement
    {
        [ConfigurationProperty("servername", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string ServerName
        {
            get
            {
                return ((string)(base["servername"]));
            }
            set
            {
                base["servername"] = value;
            }
        }

        [ConfigurationProperty("dbname", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string DBName
        {
            get
            {
                return ((string)(base["dbname"]));
            }
            set
            {
                base["dbname"] = value;
            }
        }

        [ConfigurationProperty("userid", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string UserID
        {
            get
            {
                return ((string)(base["userid"]));
            }
            set
            {
                base["userid"] = value;
            }
        }

        [ConfigurationProperty("password", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string Password
        {
            get
            {
                return ((string)(base["password"]));
            }
            set
            {
                base["password"] = value;
            }
        }

        [ConfigurationProperty("countrycode", DefaultValue = "", IsKey = true, IsRequired = true)]
        public string CountryCode
        {
            get
            {
                return ((string)(base["countrycode"]));
            }
            set
            {
                base["countrycode"] = value;
            }
        }
    }


}


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;

namespace CSRAssistant
{
    //****login config

    public class LoginConfigurationSection : ConfigurationSection
    {
        //[ConfigurationProperty("Items")]
        //public ItemsCollection Items
        //{
        //    get { return ((ItemsCollection)(base["Items"])); }
        //}

        [ConfigurationProperty("", IsDefaultCollection = true)]
        public LoginCollection Items
        {
            get
            {
                return ((LoginCollection)(base[""]));
            }
        }
    }

    [ConfigurationCollection(typeof(LoginElement))]
    public class LoginCollection : ConfigurationElementCollection
    {
        protected override ConfigurationElement CreateNewElement()
        {
            return new LoginElement();
        }

        protected override object GetElementKey(ConfigurationElement element)
        {
            return ((LoginElement)(element)).ID;
        }

        public LoginElement this[int idx]
        {
            get
            {
                return (LoginElement)BaseGet(idx);
            }
        }
    }
    public class LoginElement : ConfigurationElement
    {
        [ConfigurationProperty("UserName", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string UserName
        {
            get
            {
                return ((string)(base["UserName"]));
            }
            set
            {
                base["UserName"] = value;
            }
        }

        [ConfigurationProperty("Pwd", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string Pwd
        {
            get
            {
                return ((string)(base["Pwd"]));
            }
            set
            {
                base["Pwd"] = value;
            }
        }

        [ConfigurationProperty("Country", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string Country
        {
            get
            {
                return ((string)(base["Country"]));
            }
            set
            {
                base["Country"] = value;
            }
        }

        [ConfigurationProperty("ID", DefaultValue = "", IsKey = false, IsRequired = false)]
        public string ID
        {
            get
            {
                return ((string)(base["ID"]));
            }
            set
            {
                base["ID"] = value;
            }
        }
    }
}

呼叫方式

private void button1_Click_1(object sender, EventArgs e)
        {
            string _country = "";
            string _ServerName = "";
            LoginConfigurationSection LoginConfigurationSection = (LoginConfigurationSection)ConfigurationManager.GetSection("LoginConfiguration");
            if (LoginConfigurationSection != null)
            {
                var UserCredentials = LoginConfigurationSection.Items
                                    .Cast<LoginElement>()
                                    .FirstOrDefault(_element => _element.UserName == "razi");

                if (UserCredentials != null)
                    _country = UserCredentials.Country;



                DBConfigurationSection section = (DBConfigurationSection)ConfigurationManager.GetSection("DBConfiguration");
                if (section != null)
                {
                    var DbConnection = section.Items
                                        .Cast<ItemsElement>()
                                        .FirstOrDefault(_element => _element.CountryCode.ToUpper() == _country.ToUpper());

                    if (DbConnection != null)
                        _ServerName = DbConnection.ServerName;
                }
            }
        }
于 2014-02-05T19:52:25.600 回答