How to get rid of annoying HorizontalContentAlignment binding warning?

Question

I am working on a large WPF project and during debug my output window is filled with these annoying warnings:

System.Windows.Data Information: 10 : Ca

Answer 1

I just want to mention I struggled with a similar problem for two days (mine was a "Windows Data Error 4" error, complaining about HorizontalContentAlignment and VerticalContentAlignment).

The most common suggested solution (adding the Horizontal/VerticalContentAlignment Style to your element, or even to the App.xaml) does NOT always solve the problem.

Eventually, I discovered something unique to my own situation - I hope it can be of help to someone: If you are using the FilterEventHandler, don't unsubscribe it before resubscribing!

My old code kept on generating that "Data Error 4" message whenever I changed the Channel Filter (which calls UpdateCorporatesList):

// This code generates errors
private void UpdateCorporatesList()
{
    this.CorporatesViewSource.Filter -= new FilterEventHandler(ApplyCorporateFilter);

    if (this.ChannelFilter != null)
    {
        this.CorporatesViewSource.Filter += new FilterEventHandler(ApplyCorporateFilter);
    }
    else
    {
        this.CorporateFilter = null;
    }
}

private void ApplyCorporateFilter(object sender, FilterEventArgs e)
{
    SalesCorporate customer = e.Item as SalesCorporate;
    var currentChannel = this.Channels.FirstOrDefault(x => x.ID == this.ChannelFilter).Description;
    if ((customer.ID != null) && (customer.Channel != currentChannel))
    {
        e.Accepted = false;
    }
}

...so I changed it to re-subscribe to the FilterEventHandler every time, and rather put the check for a null on Channel Filter in the event-handling method.

// This code works as intended
private void UpdateCorporatesList()
{
    this.CorporatesViewSource.Filter += new FilterEventHandler(ApplyCorporateFilter);

    if (this.ChannelFilter == null)
    {
        this.CorporateFilter = null;
    }
}

private void ApplyCorporateFilter(object sender, FilterEventArgs e)
{
    var currentChannel = this.Channels.FirstOrDefault(x => x.ID == this.ChannelFilter);
    if (currentChannel.ID == null)
    {
        return;
    }

    SalesCorporate customer = e.Item as SalesCorporate;
    if ((customer.ID != null) && (customer.Channel != currentChannel.Description))
    {
        e.Accepted = false;
    }
}

Et Voila! No more errors :-)