配置部分未加载

Question

I've declaration of my config section in web.config (in configSection element):

<section name="gmailEmail" type="MyApp.Communication.Sections.GmailSection" allowLocation="true" allowDefinition="Everywhere" />

And usage:

<gmailEmail>
  <from emailAddress="pat.wasiewicz@gmail.com" name="MyApp"></from>
  <server password="mysuperpass">
</gmailEmail>

My config model:

public class GmailSection : ConfigurationSection
{
    [ConfigurationProperty("server")]
    public ServerElement Server { get; set; }

    [ConfigurationProperty("from")]
    public FromElement From { get; set; }
}

public class ServerElement : ConfigurationElement
{


    [ConfigurationProperty("host", DefaultValue = "smtp.gmail.com", IsRequired = false)]
    public string Host { get; set; }

    [ConfigurationProperty("port", DefaultValue = 587, IsRequired = false)]
    public int Port { get; set; }

    [ConfigurationProperty("ssl", DefaultValue = true, IsRequired = false)]
    public bool Ssl { get; set; }

    [ConfigurationProperty("password", IsRequired = true)]
    public string Password { get; set; }
}

public class FromElement : ConfigurationElement
{
    [ConfigurationProperty("emailAddress", IsRequired = true)]
    public string EmailAddress { get; set; }

    [ConfigurationProperty("name", IsRequired = false)]
    public string Name { get; set; }
}

Unfortanely, there is a problem:

var configSection = (GmailSection)ConfigurationManager.GetSection("gmailEmail");

configSection.Server is null and configSection.From is null . Why?

Answer 1

The type name for the configuration section is missing the assembly name

<section name="gmailEmail" type="MyApp.Communication.Sections.GmailSection, MyApp" allowLocation=.....

The server/password element is missing the close tag ( /> )

<server password="mysuperpass" />

But I think these are typos.

You should change all your { get; set; } property implementations to call the base class' indexer with the same key. I have implemented the GmailSection class, and you can modify the ServerElement and FormElement classes the same way.

public class GmailSection : ConfigurationSection
{
    [ConfigurationProperty("server")]
    public ServerElement Server
    {
        get
        {
            return (ServerElement)this["server"];
        }
        set
        {
            this["server"] = value;
        }
    }

    [ConfigurationProperty("from")]
    public FromElement From
    {
        get
        {
            return (FromElement)this["from"];
        }
        set
        {
            this["from"] = value;
        }
    }
}