Introduction
Recently lot of queries has been asked which is regarding to image loader.In general there is a chance of requirement in windows phone is need to set image loader when image getting from xaml feed or web service responce.Beacuse it will take some time to get our image from the web service and loaded completly.And so from the user point of view we need to put some progress bar or loader for image until it gets loaded completly.However finally i had come up with my best solution with custom progress overrellay.
Building the Sample
In this sample i had added references for following
1)Reference to Coding4Fun.Phone.Controls.dll for progress overellay control
2)We need add following custom user control progress overellay to our project.
1.Creating custom user control for spinner in windows phone
(or)
Creating custom loader in windows phone 8 xaml
XAML
<UserControl x:Class="WP7SoapRiaService.Spinner"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
d:DesignHeight="480" d:DesignWidth="480">
<Canvas RenderTransformOrigin="0.5,0.5" Margin="0,0,0,0" Width="55" Height="55" HorizontalAlignment="Center" VerticalAlignment="Center" d:LayoutOverrides="Margin">
<Canvas.RenderTransform>
<RotateTransform x:Name="SpinnerRotate" Angle="0" />
</Canvas.RenderTransform>
<Canvas.Triggers>
<EventTrigger RoutedEvent="Canvas.Loaded">
<BeginStoryboard>
<Storyboard>
<DoubleAnimation Storyboard.TargetName="SpinnerRotate"
Storyboard.TargetProperty="(RotateTransform.Angle)"
From="0" To="360" Duration="0:0:01"
RepeatBehavior="Forever" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Canvas.Triggers>
<Ellipse Width="10" Height="10" Canvas.Left="10" Canvas.Top="3"
Stretch="Fill" Fill="Black"/>
<Ellipse Width="10" Height="10" Canvas.Left="1" Canvas.Top="13"
Stretch="Fill" Fill="Black"/>
<Ellipse Width="10" Height="10" Canvas.Top="26"
Stretch="Fill" Fill="Black"/>
<Ellipse Width="10" Height="10" Canvas.Left="6" Canvas.Top="37"
Stretch="Fill" Fill="Black"/>
<Ellipse Width="10" Height="10" Canvas.Left="17" Canvas.Top="44"
Stretch="Fill" Fill="Black"/>
<Ellipse Width="10" Height="10" Canvas.Left="29" Canvas.Top="44"
Stretch="Fill" Fill="#FFF0EAEA"/>
<Ellipse Width="10" Height="10" Canvas.Left="40" Canvas.Top="36"
Stretch="Fill" Fill="Black"/>
<Ellipse Width="10" Height="10" Canvas.Left="45" Canvas.Top="24"
Stretch="Fill" Fill="Black"/>
<Ellipse Width="10" Height="10" Canvas.Left="42" Canvas.Top="12"
Stretch="Fill" Fill="#FFF0EAEA"/>
<Ellipse Width="10" Height="10" Canvas.Left="35" Canvas.Top="3"
Stretch="Fill" Fill="Black"/>
<Ellipse Width="10" Height="10" Canvas.Left="23"
Stretch="Fill" Fill="Black" Canvas.Top="-1"/>
</Canvas>
</UserControl>
Description
Here to meet the requirement i was taken listbox with one image&progress over rellay control.I had putted same margin for image &progressrelay in data template of listbox control.And first i had placed progress bar and then image control,because progress bar will be visible until image will get imagepath completely.To do so when image has image path fully then it will overlaps the progressbar that's the tricy of my sample.
XAML
<phone:PhoneApplicationPage
x:Class="ImageLoader.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768"
FontFamily="{StaticResource PhoneFontFamilyNormal}"
FontSize="{StaticResource PhoneFontSizeNormal}"
Foreground="{StaticResource PhoneForegroundBrush}"
SupportedOrientations="Portrait" Orientation="Portrait"
shell:SystemTray.IsVisible="True" xmlns:toolkit="clr-namespace:Coding4Fun.Phone.Controls;assembly=Coding4Fun.Phone.Controls" xmlns:spin="clr-namespace:WP7SoapRiaService">
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid x:Name="LayoutRoot" Background="Transparent">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="*"/>
</Grid.RowDefinitions>
<!--TitlePanel contains the name of the application and page title-->
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="12,17,0,28">
<TextBlock x:Name="ApplicationTitle" Text="Image Loader" Style="{StaticResource PhoneTextNormalStyle}"/>
<TextBlock x:Name="PageTitle" Text="ListBox" Margin="9,-7,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<!--ContentPanel - place additional content here-->
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<!--<Border BorderBrush="White" BorderThickness="1" HorizontalAlignment="Left" Height="196" Margin="124,150,0,0" VerticalAlignment="Top" Width="222">-->
<ListBox Name="Listimg" >
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Width="150" Height="auto" Background="White">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="10"/>
</Grid.RowDefinitions>
<toolkit:ProgressOverlay Grid.Row="0" Height="100" Background="White" x:Name="PrgrsOverLay" >
<toolkit:ProgressOverlay.Content>
<spin:Spinner Visibility="Visible"></spin:Spinner>
</toolkit:ProgressOverlay.Content>
</toolkit:ProgressOverlay>
<Image Grid.Row="0" Height="100" Stretch="Fill" Source="{Binding Imageurl}"/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<!--</Border>-->
</Grid>
</Grid>
</phone:PhoneApplicationPage>
Fig:Image loader Fig:Image loaded completed
C#
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
namespace ImageLoader
{
public partial class MainPage : PhoneApplicationPage
{
// Constructor
public MainPage()
{
InitializeComponent();
ImageFile IMF = new ImageFile();
List<ImageFile> lst = new List<ImageFile>();
lst.Add(new ImageFile() { Imageurl = "http://kareninthekitchen.files.wordpress.com/2012/04/strawberry-shortcake10.jpg?r=" + System.DateTime.Now });
lst.Add(new ImageFile() { Imageurl = "http://kareninthekitchen.files.wordpress.com/2012/04/strawberry-shortcake10.jpg?r=" + System.DateTime.Now });
lst.Add(new ImageFile() { Imageurl = "http://upload.wikimedia.org/wikipedia/en/1/14/Album_Nothing_Was_The_Same_cover.jpg?r=" + System.DateTime.Now });
lst.Add(new ImageFile() { Imageurl = "http://upload.wikimedia.org/wikipedia/en/1/14/Album_Nothing_Was_The_Same_cover.jpg?r=" + System.DateTime.Now });
lst.Add(new ImageFile() { Imageurl = "http://kareninthekitchen.files.wordpress.com/2012/04/strawberry-shortcake10.jpg?r=" + System.DateTime.Now });
lst.Add(new ImageFile() { Imageurl = "http://kareninthekitchen.files.wordpress.com/2012/04/strawberry-shortcake10.jpg?r=" + System.DateTime.Now });
lst.Add(new ImageFile() { Imageurl = "http://kareninthekitchen.files.wordpress.com/2012/04/strawberry-shortcake10.jpg?r=" + System.DateTime.Now });
Listimg.ItemsSource = lst; //Binding listbox with images in windowsphone 8
}
}
public class ImageFile
{
public string Imageurl
{
get;
set;
}
}
}
Windows Phone tutorials for beginners key points
This section is included for only windows phone beginners.However this article can covers following questions.Off course these key words is more helpful for getting more best results about this topic in search engines like google/bing/yahoo..1.ListBox image loader in windows phone 8 xaml,c#
2. Progress bar for image loading in windows phone 8
3. Image loader in windows phone 8
4.How to bind listbox images in windows phone 8 c#
5.User Control in windows phone 8 c# ,xaml
6. How to create custom loader from image in windows phone 8 c# ,xaml
Have a nice day by Subramanyam Raju
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