Good morning sippyuconn.
The method of tying OnSettingsModified from the assembly to
Configuration_OnValid depends on how Settings implements the ISettings
interface: either explicitly or implicitly. I will go through each
possibility with you and provide the solution respectively.
=====================================
Possibility 1: 'Settings' IMPLICITLY implements 'ISettings'
public interface ISettings
{
event EventHandler OnSettingsModified;
}
public class Settings : ISettings
{
private void textEdit_EditValueChanged(object sender, EventArgs e)
{
if (OnSettingsModified != null)
{
OnSettingsModified.Invoke(sender, e);
}
}
#region ISettings Members
public event EventHandler OnSettingsModified;
#endregion
}
The code "public event EventHandler OnSettingsModified;" tells that
'Settings' is implicitly implementing 'ISettings', and the event is a part
of the class, so we can add the event handler by writing this code:
Settings mySettings = new Settings();
mySettings.OnSettingsModified += new EventHandler(Configuration_OnValid);
=====================================
Possibility 2: 'Settings' EXPLICITLY implements 'ISettings'
public class Settings : ISettings
{
public void textEdit_EditValueChanged(object sender, EventArgs e)
{
if (OnSettingsModified != null)
{
OnSettingsModified.Invoke(sender, e);
}
}
event EventHandler OnSettingsModified;
#region ISettings Members
event EventHandler ISettings.OnSettingsModified
{
add
{
lock (OnSettingsModified)
{
OnSettingsModified += value;
}
}
remove
{
lock (OnSettingsModified)
{
OnSettingsModified -= value;
}
}
}
#endregion
}
In this implementation, the event OnSettingsModified is not exposed as a
public event from the class 'Settings', thus, we cannot tie the event
handler in the same way as "possibility 1". The event is a part of the
interface, so the right way to add the event handler is:
Settings mySettings = new Settings();
ISettings iSettings = (ISettings)mySettings;
iSettings.OnSettingsModified += new EventHandler(Configuration_OnValid);
For more information about explicitly implementing an interface event,
please refer to the MSDN article:
http://msdn.microsoft.com/en-us/library/ak9w5846(VS.80).aspx
http://msdn.microsoft.com/en-us/library/ms173157(VS.80).aspx
sippyuconn, is the above information helpful to you? If it cannot help you
with the question, I appreciate it if you could share more implementation
of the class 'Settings' or send a small reproducible project to my mailbox:
(e-mail address removed)
Have a very nice day!
Best Regards,
Jialiang Ge (
[email protected], remove 'online.')
Microsoft Online Community Support
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