Silverlight Controls and Silverlight Toolkit

Re: Re: Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

maruzounaki — Thu, 30 Jul 2009 09:37:35 GMT

im still using Silverlight 2. cause my project is using silverlight 2. :S

Re: Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

Andre Michaud — Wed, 29 Jul 2009 17:39:16 GMT

Is this with silverlight 2 or 3? I believe that this was a known issue with silverlight 2 that was fixed in 3 (datacontext doesn't pass through a tooltip).

Re: Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

maruzounaki — Tue, 28 Jul 2009 01:36:56 GMT

This is my codes and i still cant get the bindings to work from my tooltip and also eventsdetailview. can anyone help me on this?

Page.xaml.cs

void Page_Loaded(object sender, RoutedEventArgs e)
        {
            Stadium.Click += new RoutedEventHandler(Stadium_Click);
        }

        void Stadium_Click(object sender, RoutedEventArgs e)
        {
            TPmap.ServiceReference1.Eventp c = new TPmap.ServiceReference1.Eventp();
            if (c != null)
            {
                DetailsView.DataContext = c;
                DetailsView.Visibility = Visibility.Visible;
            }

        }

        void cs_GetEventsByPlaceCompleted(object sender, TPmap.ServiceReference1.GetEventsByPlaceCompletedEventArgs e)
        {
            throw new NotImplementedException();
        }
    }
}

Eventp.cs

namespace TPmap.Web
{
    public class Eventp
    {
        public string Images { get; set; }
        public string Events { get; set; }
        public string Places { get; set; }
    }
}

EventService.svc.cs

namespace TPmap.Web
{
    [ServiceContract(Namespace = "")]
    [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
    public class EventService
    {
        [OperationContract]
        public List<Eventp> GetEventsByPlace(string place)
        {
            List<Eventp> clist = new List<Eventp>();
            string connectionString = @"Server=IFCDU2-WS03\SQLEXPRESS; Database=TP; UID=user; PWD=; Trusted_Connection=True";

            SqlConnection con = new SqlConnection(connectionString);
            con.Open();
            string cmd = "Select * from Events";

            SqlCommand com = new SqlCommand(cmd, con);
            SqlDataReader r = com.ExecuteReader();
            while (r.Read())
            {
                Eventp c = new Eventp();
                c.Images = r["image"].ToString();
                c.Events = r["eventName"].ToString();
                c.Places = r["place"].ToString();
                clist.Add(c);
            }
            com.Dispose();

            con.Close();
            con.Dispose();

            return clist;
        }
    }
}

Page.xaml

this is what ive come out with but still, there isnt anything displayed inside my tooltip.Help anyone?

Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

JohnDMathis — Fri, 13 Mar 2009 18:37:03 GMT

Unfortunately, the approach above does not seem to work when the TextBlock in question is inside a ControlTemplate. (In my case, the ControlTemplate for a BarDataPoint.) The Loaded event is never fired. Can anyone suggest a suitable workaround? Essentially, how can I get to a TextBlock defined in a ControlTemplate?

Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

Amanda Wang - MSFT — Mon, 24 Nov 2008 10:40:31 GMT

Hi silverbyte,

We have a debug on our labs, and found that the TextBlock's DataContext is null in ToolTipService.ToolTip . That's why the button's tooltip is empty.

You can try to set the Textblock's datacontext in the code, like below code, the tooltip works fine on our local.

The code:

private void txt_Loaded(object sender, RoutedEventArgs e)
        {
           TextBlock text = (TextBlock)sender;
            text.DataContext = this.btn.DataContext;
        }

Re: Re: Re: Re: Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

silverbyte — Thu, 20 Nov 2008 15:56:17 GMT

anybody :)

Re: Re: Re: Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

silverbyte — Wed, 19 Nov 2008 22:23:34 GMT

would be nice to have an explanation

Re: Re: Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

silverbyte — Wed, 19 Nov 2008 14:46:58 GMT

anyone ?

Re: Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

silverbyte — Wed, 19 Nov 2008 12:14:23 GMT

I realize now that the fact that it doesn't work with custom layout has a great impact.

For example, I have a ListBox with ItemSource set.

In order for me to make the tooltip to work with a custom layout like above, what should I do, iterate through all items and set the DataContext for each tooltip TextBlock of an item ?

Again, I don't understand why using attached property works but not when setting a custom layout with ToolTip.Content.

Re: Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

silverbyte — Wed, 19 Nov 2008 11:59:38 GMT

Thank you Sergey.

Indeed, setting the DataContext on the TextBlock make the tooltip to work:

namespace TooltipDataBindingTest
{
    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();

            Person person = new Person();
            person.Name = "Andrew";
            this.txtBlock.DataContext = person;
        }
    }
}

But I still don't understand and I am confused.

Why when using ToolTipService.ToolTip attached property it DOES work:

but when using a custom layout it does NOT work:

Both of them use the same way of data binding:

    public partial class Page : UserControl
    {
        public Page()
        {
            InitializeComponent();

            Person person = new Person();
            person.Name = "Andrew";
            this.btn.DataContext = person;
        }
    }

I expect either both to work or not work in the same time. Why they are working differently ?

Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

Sergey.Lutay — Wed, 19 Nov 2008 11:33:02 GMT

I think you need to set DataContext property of TextBlock.

Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

lee_sl — Wed, 19 Nov 2008 11:31:15 GMT

you have to handle loaded event of the control and set the tooltip programatically

Re: Re: Does DataBinding works in ToolTip when defining tooltip layout ?

silverbyte — Wed, 19 Nov 2008 11:24:33 GMT

Yes, thanks for your comment.

I've made a simple test application. I created a new Silverlight application and added a Button on the Page:

Binding is defined like this:

    public class Person
    {
        public string Name
        {
            get;
            set;
        }
    }

You can quickly create a Silvelright application called TooltipDataBindingTest so you can copy and paste the above code.

Re: Does DataBinding works in ToolTip when defining tooltip layout ?

Sergey.Lutay — Wed, 19 Nov 2008 11:13:39 GMT

Hi,

Can you show how you set an data item to your element?

Does DataBinding works in ToolTip when defining tooltip layout ?

silverbyte — Wed, 19 Nov 2008 11:10:20 GMT

I am trying to create my own ToolTip layout like this:

                            <ToolTipService.ToolTip>
                                <StackPanel>
                                    <TextBlock Text="{Binding Title}" />
                                </StackPanel>
                            </ToolTipService.ToolTip>

But it doesn't seem to work, it displays a small part of a tooltip (a small horizontal line), it appears like the binding does not work and tooltip text is empty "".

If I replace with a text instead (no data binding), obviously, it works:

                             <ToolTipService.ToolTip>
                                <StackPanel>
                                    <TextBlock Text="AAA" />
                                </StackPanel>
                            </ToolTipService.ToolTip>

Furthermore, if I use the ToolTipService.ToolTip as an attached property it works:

ToolTipService.ToolTip="{Binding Title}".

So the binding does work.

It seems that the tooltip doesn't work when I am trying to define the layout AND use data binding

Have you used tooltip with layout and data binding successfully ?