Hi,
please copy paste and run this code below and help me in doing the animation in popup when you click on the listview items, the popup should expand very slowly when the mouse enter and collapse back when the mouse leave, expecting your reply :). i tried with the time duration found in the popup say some 5 secs, but it displaying only after 5 secs suddenly, i dont want the popup to display suddenlt, hope ui understand my problem, please rply soon 
<Window x:Class=“WpfApplication4.Window1”
xmlns=“http://schemas.microsoft.com/winfx/2006/xaml/presentation”
xmlns:x=“http://schemas.microsoft.com/winfx/2006/xaml”
Title=“List_View Example” Height=“301” Width=“361” WindowStartupLocation=“Manual”
xmlns:sys=“clr-namespace:System;assembly=mscorlib” >
<Window.Resources>
<XmlDataProvider x:Key=“employee_DS” Source=“data.xml”
x:Name=“empdata” />
<Style x:Key="{x:Type Button }" TargetType="{x:Type Button}">
<Setter Property=“FontFamily” Value=“Tahoma” />
<Setter Property=“FontSize” Value=“10” />
<Setter Property=“Height” Value=“65” />
<Setter Property=“Margin” Value=“20,20,20,0” />
</Style>
</Window.Resources>
<Window.Background>
<!-- background gradient -->
<LinearGradientBrush StartPoint=“0,0” EndPoint=“0,1”>
<LinearGradientBrush.GradientStops>
<GradientStop Color=“Aqua” Offset=“0” />
<GradientStop Color=“BlanchedAlmond” Offset=“0.5” />
<GradientStop Color=“Chocolate” Offset=“0.9” />
<GradientStop Color=“DarkOrange” Offset=“1” />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</Window.Background>
<StackPanel >
<Grid>
<ListView Name=“lstvwEmployees” Margin=“25,0,21,-156” ItemTemplate="{DynamicResource EmployeeTemplate}"
ItemsSource="{Binding Source={StaticResource employee_DS},
XPath=/wipro_employee/employee}" SelectionChanged=“ListView_SelectionChanged” Cursor=“Hand” MouseEnter =“lstvwEmployees_MouseEnter” Height=“99” VerticalAlignment=“Bottom”>
<!-- for mouse enter event ,it triggers the scaletransform–>
<ListView.ItemContainerStyle>
<Style TargetType=“ListViewItem”>
<Style.Triggers>
<Trigger Property=“IsMouseOver” Value=“True”>
<Setter Property=“Panel.ZIndex” Value="{x:Static sys:Int32.MaxValue}"/>
<Setter Property=“RenderTransform”>
<Setter.Value>
<ScaleTransform ScaleX=“1” ScaleY=“1”/>
</Setter.Value>
</Setter>
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<ParallelTimeline BeginTime=“0:0:0”>
<DoubleAnimation Duration=“00:00:00.3000000” To=“1.5” Storyboard.TargetProperty=“RenderTransform.(ScaleTransform.ScaleY)”/>
<DoubleAnimation Duration=“00:00:00.3000000” To=“1.5” Storyboard.TargetProperty=“RenderTransform.(ScaleTransform.ScaleX)”/>
</ParallelTimeline>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<ParallelTimeline BeginTime=“0:0:0”>
<DoubleAnimation Duration=“00:00:00.3000000” To=“2” Storyboard.TargetProperty=“RenderTransform.(ScaleTransform.ScaleY)”/>
<DoubleAnimation Duration=“00:00:00.3000000” To=“2” Storyboard.TargetProperty=“RenderTransform.(ScaleTransform.ScaleX)”/>
</ParallelTimeline>
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
</Style.Triggers>
</Style>
</ListView.ItemContainerStyle>
<!-- for listview to show animation as outer glow effect–>
<ListView.BitmapEffect>
<BitmapEffectGroup>
<OuterGlowBitmapEffect GlowColor=“CornflowerBlue” GlowSize=“15”/>
<DropShadowBitmapEffect ShadowDepth=“10” Softness=“5”/>
<BevelBitmapEffect BevelWidth=“15”/>
</BitmapEffectGroup>
</ListView.BitmapEffect>
<ListView.View>
<GridView >
<GridViewColumn Header=“Code” Width=“50” DisplayMemberBinding="{Binding XPath=Code}" />
<GridViewColumn Header=“Name” Width=“100” DisplayMemberBinding="{Binding XPath=Name}"/>
<GridViewColumn Header=“Country” DisplayMemberBinding="{Binding XPath=Country}"/>
</GridView>
</ListView.View>
</ListView>
<Button Height=“34” Name=“button1” Width=“77” HorizontalAlignment=“Right” Margin=“0,0,21,-201” VerticalAlignment=“Bottom” Click=“button1_Click”>Close Window</Button>
</Grid>
<!-- button to show animation as outer glow effect–>
<Popup Placement=“Mouse” Name=“popup” PopupAnimation=“Slide”
DataContext="{StaticResource employee_DS}" AllowsTransparency=“True”>
<Grid Name=“grid1” Background=“Gray” DataContext="{Binding}">
<TextBlock Margin=“20,27,10,22” >Details of the Employee</TextBlock>
<Label Margin=“20,48,172,0” Content=“Code” Height=“24” VerticalAlignment=“Top”></Label>
<Label Content=“Name” Margin=“20,86,0,132” HorizontalAlignment=“Left” Width=“43”></Label>
<Label Content=“Country” Margin=“20,124,0,106” HorizontalAlignment=“Left” Width=" 50"></Label>
<Button Background=“ForestGreen” Margin=“0,0,10,0” Name=“ex” Content=“Exit” Click=“Button_Click_1” HorizontalAlignment=“Right” Width=“69” Height=“26” VerticalAlignment=“Bottom”></Button>
<TextBox Text="{Binding XPath=Code}" Height=“26” Margin=“108,54,32,0” Name=“textBox1” VerticalAlignment=“Top”/>
<TextBox Text="{Binding XPath=Name}" Height=“26” Margin=“108,89,32,0” Name=“textBox2” VerticalAlignment=“Top”/>
<TextBox Text="{Binding XPath=Country}" Height=“27” Margin=“107,124,32,0” Name=“textBox3” VerticalAlignment=“Top”/>
<Label HorizontalAlignment=“Left” Margin=“20,158,0,142” Name=“Label1” Width=“83”>Age</Label>
<TextBox Text="{Binding XPath=age}" Margin=“107,164,32,139” Name=“textBox4” />
<Label Height=“32” HorizontalAlignment=“Left” Margin=“21,0,0,90” Name=“label2” VerticalAlignment=“Bottom” Width=“94”>Job Status</Label>
<TextBox Text="{Binding XPath=job}" Height=“25” Margin=“107,0,30,95” Name=“textBox5” VerticalAlignment=“Bottom” />
<Label Height=“32” HorizontalAlignment=“Left” Margin=“21,0,0,30” Name=“label3” VerticalAlignment=“Bottom” Width=“83”>Details</Label>
<Label Content="{Binding XPath=details}" Height=“63” Margin=“93,0,18,22” Name=“label4” VerticalAlignment=“Bottom”></Label>
</Grid>
</Popup>
<Grid>
<Grid.Triggers>
<!-- story board for mouse enter animation–>
<EventTrigger RoutedEvent=‘Rectangle.MouseEnter’ Storyboard.TargetName=“popup” Storyboard.TargetProperty="(Popup.IsOpen)">
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName=“lstvwEmployees”
Storyboard.TargetProperty=“Opacity”
To=“1.0” Duration=“0:0:1”/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
<EventTrigger RoutedEvent=‘Rectangle.MouseLeave’>
<EventTrigger.Actions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName=“lstvwEmployees”
Storyboard.TargetProperty=“Opacity”
To=“0.3” Duration=“0:0:2”/>
</Storyboard>
</BeginStoryboard>
</EventTrigger.Actions>
</EventTrigger>
</Grid.Triggers>
</Grid>
</StackPanel>
</Window>
for refer : please visit MSDN home page and see the top right corner where you find Microsofft.com on moving the mouse over that you can see some popup amination which slowly opens and cllose on mouse enter and leave event,
Expecting reply from all other people who loves .Net 
