Hello,

I have a problem regrading data binding objects. I wrote a simple form that handles the management of users. I databound the textbox by code as follows:

No problem here, if I change the value in my textbox the property gets changed in the object. The problem I have is with the code below:

When I changed the properties in the code,they get updated in the object but the textbox doesn't show the changes. Can anyone help me out on this issue?

Thanks in advance!

PS: The username property is as follows:

Code Snippet

public string Username

{

get { return _username; }

set {

try

{

if (usernameChanged != null)

{

if (value == "")

{

usernameChanged(this, new ErrorEventArgs("Username" , "The username is required. Please enter a value"));

_username = "";

}

else

{

usernameChanged(this, new ErrorEventArgs("Username", ""));

_username = value;

}

}

else

{

Console.WriteLine("Eventhandeler is not called for");

}

}

catch (Exception ex)

{

throw(ex);

}

}

}

The databinding mechanism built in the .NET Framework looks for one of two events:

1. A PropertyChanged event from a class that implements INotifyPropertyChanged, or

2. For a property named XyZ, an XyZChanged event where case is important.

Since your event was called usernameChanged, it did not update when property Username was changed. Either change your property name or the name of the event.

Tony

Ok for some unknown reason it does seem to work when I write my propertyname as username instead of Username...

Anyone have any idea why?

The databinding mechanism built in the .NET Framework looks for one of two events:

1. A PropertyChanged event from a class that implements INotifyPropertyChanged, or

2. For a property named XyZ, an XyZChanged event where case is important.

Since your event was called usernameChanged, it did not update when property Username was changed. Either change your property name or the name of the event.

Tony

Thank you very much! This cleared up this part.
Now I am stuck at the problem that my databindings with custom events dont work in usercontrols for some reason.

The full story here:

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=1762274&SiteID=1