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

This worked for me. Put this in your Application.xaml file.

<Application.Resources>
    <Style TargetType="ComboBoxItem">
        <Setter Property="HorizontalContentAlignment" Value="Left" />
        <Setter Property="VerticalContentAlignment" Value="Center" />
    </Style>
</Application.Resources>

from...

http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/42cd1554-de7a-473b-b977-ddbd6298b3d0

Answer 2

Same problem is with 'MenuItem' if it is placed directly in panels like 'StackPanel' etc. And can be fixed using Carter's answer above, just replace 'ComboBoxItem' with 'MenuItem' in that 'Style'

Answer 3

I don't know if after more than a year your are still interested in this problem but my solution was to explicitly write in the style the value for this. For example:

<Style x:Key="{x:Type ComboBoxItem}" TargetType="{x:Type ComboBoxItem}">
    <Setter Property="HorizontalContentAlignment" Value="Stretch"/>

And that simply solved that problem.

Answer 4

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 :-)