從web.config讀取自定義配置返回null

Question

我試圖從數據庫/添加元素中讀取值，但是每次都會拋出異常。 這里怎么了...我不明白。

如果這是一個線索，則此代碼在其自己的程序集中。

在web.config中配置

<sectionGroup name="sessionFactoryConfiguration">
  <section name="Databases" type="Boot.Multitenancy.Configuration.SessionFactoryConfiguration, ConfigurationCollectionAttribute"/>
</sectionGroup>


<sessionFactoryConfiguration>
  <Databases>
        <add name="www.domain.com" autoPersist="true" dbType="SqlCe"/>
        <add name="www.domain.net" autoPersist="true" dbType="SqlCe"/>
</Databases>
</sessionFactoryConfiguration>

嘗試從該部分獲取值。 一世

var conf = ConfigurationManager.GetSection("Databases") as SessionFactoryConfiguration;
      if (conf == null)
            throw new Exception("Not loaded"); //Throws exception each time.

執行部分。

public class DatabaseSection : ConfigurationElement
{
    public DatabaseSection() { }
    public DatabaseSection(String name, bool autoPersist, DbType dbtype)
    {
        this.Name = name;
        this.AutoPersist = autoPersist;
        this.DbType = dbtype;
    }

    [ConfigurationProperty("name")]
    public String Name
    {
        get { return (String)this["name"]; }
        set { this["name"] = value; }
    }

    [ConfigurationProperty("autoPersist", DefaultValue = false, IsRequired = false)]
    public Boolean AutoPersist
    {
        get { return (Boolean)this["autoPersist"]; }
        set { this["autoPersist"] = value; }
    }

    /// <summary>
    /// DbType
    /// </summary>
    [ConfigurationProperty("dbType", DefaultValue = DbType.SqlCe, IsRequired = false)]
    public DbType DbType
    {
        get { return (DbType)this["dbType"]; }
        set { this["dbType"] = value; }
    }
}

ConfigurationCollection屬性已添加到類。

public class SessionFactoryConfiguration : ConfigurationSection
{
    [ConfigurationProperty("Databases", IsDefaultCollection = false)]
    [ConfigurationCollection(typeof(DatabaseCollection), AddItemName = "add", ClearItemsName = "clear", RemoveItemName = "remove")]
    public DatabaseCollection Databases
    {
        get { return (DatabaseCollection)base["Databases"]; }
    }
}


public class DatabaseCollection : ConfigurationElementCollection
{
    public DatabaseCollection()
    {
        Add((DatabaseSection)CreateNewElement());
    }

    public override ConfigurationElementCollectionType CollectionType
    {
        get { return ConfigurationElementCollectionType.AddRemoveClearMap; }
    }

    protected override ConfigurationElement CreateNewElement()
    {
        return new DatabaseSection();
    }
 ....//long code

}

Answer 1

如此簡單...我只需要在Web配置中將ConfigurationCollectionAttribute更改為我的AssemblyName ...

在每個示例中，他們都引用此屬性...

來自：節名稱=“ sessionFactoryConfiguration” type =“ Boot.Multitenancy.Configuration.SessionFactoryConfiguration，ConfigurationCollectionAttribute” />

若要：部分名稱=“ sessionFactoryConfiguration”類型=“ Boot.Multitenancy.Configuration.SessionFactoryConfiguration，Boot.Multitenancy” />