In a web application, I want to be able to define some mapping using a config section like this:
<configuration>
<configSections>
<sectionGroup name="MyCustomer">
<section name="CatalogMappings" type="MyCustom.MyConfigSection" />
</sectionGroup>
</configSections>
<MyCustomer>
<catalogMappings>
<catalog name="toto">
<mapping value="1" displayText="titi" />
<mapping value="2" displayText="tata" />
</catalog>
<catalog name="toto2">
<mapping value="1" displayText="titi2" />
<mapping value="2" displayText="tata2" />
</catalog>
</catalogMappings>
</MyCustomer>
</configuration>
I'm struggling to achieve this goal, especially when defining my collection of collections. What are the classes that I need to implement to achieve this?
Currently, I have:
public class CatalogMappingSection : System.Configuration.ConfigurationSection
{
public class Mapping : ConfigurationElement
{
[ConfigurationProperty("externalKey")]
public string ExternalKey { get; set; }
[ConfigurationProperty("displayText", IsRequired=true)]
public string DisplayText { get; set; }
[ConfigurationProperty("value", IsRequired=true, IsKey=true)]
public int Value { get; set; }
}
public class Catalog : ConfigurationElementCollection
{
[ConfigurationProperty("name", IsRequired=true, IsKey=true)]
public string Name { get; set; }
protected override ConfigurationElement CreateNewElement()
{
return new Mapping();
}
protected override object GetElementKey(ConfigurationElement element)
{
return ((Mapping)element).Value;
}
}
public class CatalogCollection : ConfigurationElementCollection
{
[ConfigurationProperty("catalog")]
[ConfigurationCollection(typeof(Catalog))]
public Catalog CatalogMappingCollection
{
get
{
return (Catalog)base["catalog"];
}
}
protected override ConfigurationElement CreateNewElement()
{
return new Catalog();
}
protected override object GetElementKey(ConfigurationElement element)
{
return ((Catalog)element).Name;
}
}
[ConfigurationProperty("catalogMappings")]
[ConfigurationCollection(typeof(CatalogCollection))]
public CatalogCollection CatalogMappings
{
get
{
return (CatalogCollection)base["catalogMappings"];
}
}
}
But, this is not working as expected.
I finally found this guy's example. It was coded and worked right out of the box.
http://manyrootsofallevilrants.blogspot.com/2011/07/nested-custom-configuration-collections.html
I am going to paste the code here......only because I cannot stand it when someone says "Your answer is here", and the link is dead.
Please try his website first, and leave a "thank you" if it works.
using System; using System.Configuration; namespace SSHTunnelWF { public class TunnelSection : ConfigurationSection { [ConfigurationProperty("", IsDefaultCollection = true)] public HostCollection Tunnels { get { HostCollection hostCollection = (HostCollection)base[""]; return hostCollection; } } } public class HostCollection : ConfigurationElementCollection { public HostCollection() { HostConfigElement details = (HostConfigElement)CreateNewElement(); if (details.SSHServerHostname != "") { Add(details); } } public override ConfigurationElementCollectionType CollectionType { get { return ConfigurationElementCollectionType.BasicMap; } } protected override ConfigurationElement CreateNewElement() { return new HostConfigElement(); } protected override Object GetElementKey(ConfigurationElement element) { return ((HostConfigElement)element).SSHServerHostname; } public HostConfigElement this[int index] { get { return (HostConfigElement)BaseGet(index); } set { if (BaseGet(index) != null) { BaseRemoveAt(index); } BaseAdd(index, value); } } new public HostConfigElement this[string name] { get { return (HostConfigElement)BaseGet(name); } } public int IndexOf(HostConfigElement details) { return BaseIndexOf(details); } public void Add(HostConfigElement details) { BaseAdd(details); } protected override void BaseAdd(ConfigurationElement element) { BaseAdd(element, false); } public void Remove(HostConfigElement details) { if (BaseIndexOf(details) >= 0) BaseRemove(details.SSHServerHostname); } public void RemoveAt(int index) { BaseRemoveAt(index); } public void Remove(string name) { BaseRemove(name); } public void Clear() { BaseClear(); } protected override string ElementName { get { return "host"; } } } public class HostConfigElement:ConfigurationElement { [ConfigurationProperty("SSHServerHostname", IsRequired = true, IsKey = true)] [StringValidator(InvalidCharacters = " ~!@#$%^&*()[]{}/;’\"|\\")] public string SSHServerHostname { get { return (string)this["SSHServerHostname"]; } set { this["SSHServerHostname"] = value; } } [ConfigurationProperty("username", IsRequired = true)] [StringValidator(InvalidCharacters = " ~!@#$%^&*()[]{}/;’\"|\\")] public string Username { get { return (string)this["username"]; } set { this["username"] = value; } } [ConfigurationProperty("SSHport", IsRequired = true, DefaultValue = 22)] [IntegerValidator(MinValue = 1, MaxValue = 65536)] public int SSHPort { get { return (int)this["SSHport"]; } set { this["SSHport"] = value; } } [ConfigurationProperty("password", IsRequired = false)] public string Password { get { return (string)this["password"]; } set { this["password"] = value; } } [ConfigurationProperty("privatekey", IsRequired = false)] public string Privatekey { get { return (string)this["privatekey"]; } set { this["privatekey"] = value; } } [ConfigurationProperty("privatekeypassphrase", IsRequired = false)] public string Privatekeypassphrase { get { return (string)this["privatekeypassphrase"]; } set { this["privatekeypassphrase"] = value; } } [ConfigurationProperty("tunnels", IsDefaultCollection = false)] public TunnelCollection Tunnels { get { return (TunnelCollection)base["tunnels"]; } } } public class TunnelCollection : ConfigurationElementCollection { public new TunnelConfigElement this[string name] { get { if (IndexOf(name) < 0) return null; return (TunnelConfigElement)BaseGet(name); } } public TunnelConfigElement this[int index] { get { return (TunnelConfigElement)BaseGet(index); } } public int IndexOf(string name) { name = name.ToLower(); for (int idx = 0; idx < base.Count; idx++) { if (this[idx].Name.ToLower() == name) return idx; } return -1; } public override ConfigurationElementCollectionType CollectionType { get { return ConfigurationElementCollectionType.BasicMap; } } protected override ConfigurationElement CreateNewElement() { return new TunnelConfigElement(); } protected override object GetElementKey(ConfigurationElement element) { return ((TunnelConfigElement)element).Name; } protected override string ElementName { get { return "tunnel"; } } } public class TunnelConfigElement : ConfigurationElement { public TunnelConfigElement() { } public TunnelConfigElement(string name, int localport, int remoteport, string destinationserver) { this.DestinationServer = destinationserver; this.RemotePort = remoteport; this.LocalPort = localport; this.Name = name; } [ConfigurationProperty("name", IsRequired = true, IsKey = true, DefaultValue = "")] public string Name { get { return (string)this["name"]; } set { this["name"] = value; } } [ConfigurationProperty("localport", IsRequired = true, DefaultValue =1)] [IntegerValidator(MinValue = 1, MaxValue = 65536)] public int LocalPort { get { return (int)this["localport"]; } set { this["localport"] = value; } } [ConfigurationProperty("remoteport", IsRequired = true, DefaultValue =1)] [IntegerValidator(MinValue = 1, MaxValue = 65536)] public int RemotePort { get { return (int)this["remoteport"]; } set { this["remoteport"] = value; } } [ConfigurationProperty("destinationserver", IsRequired = true)] [StringValidator(InvalidCharacters = " ~!@#$%^&*()[]{}/;’\"|\\")] public string DestinationServer { get { return (string)this["destinationserver"]; } set { this["destinationserver"] = value; } } } }
And the configuration code
<?xml version="1.0"?> <configuration> <configSections> <section name="TunnelSection" type="SSHTunnelWF.TunnelSection,SSHTunnelWF" /> </configSections> <TunnelSection> <host SSHServerHostname="tsg.edssdn.net" username="user" SSHport="22" password="pass" privatekey="" privatekeypassphrase=""> <tunnels> <tunnel name="tfs" localport="8081" remoteport="8080" destinationserver="tfs2010.dev.com" /> <tunnel name="sql" localport="14331" remoteport="1433" destinationserver="sql2008.dev.com" /> <tunnel name="crm2011app" localport="81" remoteport="80" destinationserver="crm2011betaapp.dev.com" /> </tunnels> </host> <host SSHServerHostname="blade16" username="root" SSHport="22" password="pass" privatekey="" privatekeypassphrase=""> <tunnels> <tunnel name="vnc" localport="5902" remoteport="5902" destinationserver="blade1.dev.com" /> </tunnels> </host> </TunnelSection> </configuration>
And then the "call"
TunnelSection tunnels = ConfigurationManager.GetSection("TunnelSection") as TunnelSection