SilverlightShow: Using the ToolTip control in Silverlight 2 Comments

RE: Using the ToolTip control in Silverlight 2

( Parimal) — Wed, 11 Jun 2008 13:47:48 -0500

How can i use the Tooltip style mentioned in App.xaml file to set the style for the tooltip programatically?

I defined following in App.xaml file:

Style x:Key="TooltipFormat" TargetType

="ToolTip">

<Setter Property="Foreground" Value="Red">Setter

Style>

In the code file i am accessing the style in following way but i get parser error:

TextBlock

objToolTip = new TextBlock();

objToolTip.Text = reader.GetAttribute(

objToolTip.TextWrapping =

objToolTip.HorizontalAlignment =

objToolTip.Width = 200;

"toolTip");TextWrapping.Wrap;HorizontalAlignment.Left;ToolTipService.SetToolTip(txtCategory, objToolTip);

Parimal

RE: Using the ToolTip control in Silverlight 2

( emil) — Wed, 11 Jun 2008 05:07:17 -0500

Brij,

check this Silverlight example also: (hover over to get the tooltip)

Download the source code here

RE: Using the ToolTip control in Silverlight 2

( emil) — Wed, 11 Jun 2008 04:46:48 -0500

Hi brij,

Yes, it is possible and actually it is pretty easy. Lets take the example from the article. Instead of an Image control in the ToolTip.Content you can put a TextBlock element and create an event handler for its Loaded event. In the event handler you can make the call the web service to get the data you want to display. To get the idea see the example below:

<Image x:Name="turtle" Source="GiantSeaTurtle.jpg" 
	Width="400" Height="300">
    <ToolTipService.ToolTip>
        <ToolTip>
            <ToolTip.Content>
                <TextBlock Loaded="toolTip_Loaded">TextBlock>
            ToolTip.Content>
        ToolTip>
    ToolTipService.ToolTip>
Image>

Code behind

private void toolTip_Loaded( object sender, RoutedEventArgs e )
{
    // call the web service to get the desired data            
    string data = "data received from the web service";
    ( ( TextBlock )sender ).Text = data;
}

The Loaded event will be fired exactly when the ToolTip 
has to be shown (i.e. when the mouse is over the control).
Hope this helps

RE: Using the ToolTip control in Silverlight 2

( brij) — Wed, 11 Jun 2008 03:51:16 -0500

hi,

is it possible to load a tooltip content, through a webservice, if and only if someone hovers over the image; say we are trying to get some data on the mousemove over a datagrid rows, there migth be 10000 rows, and we are intrstd in getting the tooltip content on the fly.

regards