Develop Reference

Why are my BitmapImages not displaying?

Ad[a,o]pting Brundritt's example here, which he referenced in responding to my earlier BingMaps question, I have been able to display certain data in an "infobox" like so:
...but am not getting the BitmapImage that is part of the data I intend to display.
My question is why are the images not displaying, and what do I need to go in order to display them?
It's not the data - I've saved the thumbnail image to a SQLite database, where it is stored as an array of bytes, but which can be seen as images in SQLiteToolbox:
:
So as you can see, the String data is displaying fine, but not the image. Here is the pertinent code I've got for retrieving the data and displaying it:
// The class used to create the SQLite table
public class PhotraxBaseData
{
[SQLite.PrimaryKey]
[SQLite.AutoIncrement]
public int Id { get; set; }
. . .
public DateTime dateTimeTaken { get; set; }
public String filePath { get; set; }
public Byte[] thumbnail { get; set; }
}
private async void Gener8MapMarkers(List<PhotraxBaseData> _pbd)
{
foreach (PhotraxBaseData pbd in _pbd)
{
String descAndFilename = Path.GetFileName(pbd.filePath);
if (null != pbd.imgDescription)
{
descAndFilename = String.Format("{0} - {1}", pbd.imgDescription, descAndFilename);
}
BitmapImage bmi = await PhotraxUtils.ByteArrayToBitmapImage(pbd.thumbnail);
if (PhotraxUtils.ValidLatAndLong(pbd.latitude, pbd.longitude))
{
Location loc = new Location(pbd.latitude, pbd.longitude);
AddPushpin(loc, descAndFilename, pbd.dateTimeTaken, null, DataLayer);
}
}
}
public static async Task<BitmapImage> ByteArrayToBitmapImage(this byte[] byteArray)
{
// from http://dotnetspeak.com/2013/04/convert-byte-array-to-an-image-in-winrt
if (byteArray != null)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(byteArray.AsBuffer());
var image = new BitmapImage();
stream.Seek(0);
image.SetSource(stream);
return image;
}
}
return null;
}
public class PushpinMetadata
{
public string DescAndFileName { get; set; }
public DateTime DateTimeTaken { get; set; }
public BitmapImage Thumbnail { get; set; }
}
public void AddPushpin(Location latlong, string descAndFileName, DateTime dateTimeTaken, BitmapImage thumbnail, MapLayer layer)
{
Pushpin p = new Pushpin()
{
Tag = new PushpinMetadata()
{
DescAndFileName = descAndFileName,
DateTimeTaken = dateTimeTaken,
Thumbnail = thumbnail
}
};
MapLayer.SetPosition(p, latlong);
p.Tapped += PinTapped;
layer.Children.Add(p);
}
private void PinTapped(object sender, Windows.UI.Xaml.Input.TappedRoutedEventArgs e)
{
Pushpin p = sender as Pushpin;
PushpinMetadata m = (PushpinMetadata)p.Tag;
//Ensure there is content to be displayed
if (!String.IsNullOrEmpty(m.DescAndFileName))
{
Infobox.DataContext = m;
Infobox.Visibility = Visibility.Visible;
MapLayer.SetPosition(Infobox, MapLayer.GetPosition(p));
}
else
{
Infobox.Visibility = Visibility.Collapsed;
}
}
The XAML:
<bm:Map.Children>
<!-- Data Layer-->
<bm:MapLayer Name="DataLayer"/>
<!--Common Infobox-->
<bm:MapLayer>
<Grid x:Name="Infobox" Visibility="Collapsed" Margin="0,-115,-15,0">
<Border Width="300" Height="110" Background="Black" Opacity="0.8" BorderBrush="White" BorderThickness="2" CornerRadius="5"/>
<StackPanel Height="100" Margin="5">
<Grid Height="40">
<TextBlock Text="{Binding DescAndFileName}" FontSize="20" Width="250" TextWrapping="Wrap" HorizontalAlignment="Left" />
<Button Content="X" Tapped="CloseInfobox_Tapped" HorizontalAlignment="Right" VerticalAlignment="Top"/>
</Grid>
<Grid Height="40">
<Viewbox Height="200" Stretch="Uniform" StretchDirection="Both">
<Image Source="{Binding Thumbnail}" Width="Auto" Height="Auto" Margin="2"/>
</Viewbox>
</Grid>
<Grid Height="40">
<TextBlock Text="{Binding DateTimeTaken}" FontSize="16" Width="290" TextWrapping="Wrap" Height="Auto"/>
</Grid>
</StackPanel>
</Grid>
</bm:MapLayer>
<callisto:CustomDialog Content="CustomDialog" Height="100" Width="100"/>
</bm:Map.Children>
My guess is that the Image's Source property doesn't quite know what to do with the BitmapImage it's bound to via "Thumbnail"; but I don't know how to unbabelize the mismatch (presuming that's where the problem lies).
UPDATE
To answer Faye's brother Chris, here is the "database" (SQLite class) declaration:
public Byte[] thumbnail { get; set; }
Here is where I was calling the converter method, passing the appropriate member of the class instance, and then adding a pushpin:
BitmapImage bmi = await PhotraxUtils.ByteArrayToBitmapImage(pbd.thumbnail);
if (PhotraxUtils.ValidLatAndLong(pbd.latitude, pbd.longitude))
{
Location loc = new Location(pbd.latitude, pbd.longitude);
//AddPushpin(loc, descAndFilename, pbd.dateTimeTaken, null, DataLayer);
AddPushpin(loc, descAndFilename, pbd.dateTimeTaken, bmi, DataLayer);
}
However: MY BAD, PEOPLES!!!
I had neglected to replace my placeholder "null" arg with "bmi" (you can see my previous code commented out above, and my new working call to AddPushpin() below it). The image's size/scale is all wrong, but that can be fixed easily enough, I reckon.
I don't know whether to jump for joy or kick myself in the keister, so I think I'll do both simultaneously.
Thanks to Mr. Dunaway for making me look closer at my code - something I obviously should have done before posting.

how to display an image from web service

I am building my first app in windows phone 7. I need to show data from web service along with an image. I am able to show the data but not able to show the image.
My xaml code is:
<Grid x:Name="ContentPanel" Grid.Row="1" Margin="12,0,12,0">
<ListBox Name="listBox1">
<ListBox.ItemTemplate>
<DataTemplate>
<Button>
<Button.Content>
<ScrollViewer HorizontalScrollBarVisibility="Auto" Height="80" Width="400">
<!--<ScrollViewer Height="80">-->
<StackPanel Orientation="Horizontal" Margin="0,0,0,0">
<StackPanel Orientation="Vertical" Height="80">
<TextBlock Text="{Binding Path=News_Title}" TextWrapping="Wrap" ></TextBlock>
<TextBlock Text="{Binding Path=News_Description}" TextWrapping="Wrap"></TextBlock>
<TextBlock Text="{Binding Path=Date_Start}" TextWrapping="Wrap"></TextBlock>
<Image Source="{Binding Path=Image_Path}" />
</StackPanel>
</StackPanel>
</ScrollViewer>
</Button.Content>
</Button>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Grid>
The .cs code is:
public class Newss
{
public string News_Title { get; set; }
public string News_Description { get; set; }
public string Date_Start { get; set; }
}
public News()
{
InitializeComponent();
KejriwalService.aapSoapClient client = new KejriwalService.aapSoapClient();
client.getarvindNewsCompleted += new EventHandler<KejriwalService.getarvindNewsCompletedEventArgs>(client_getarvindNewsCompleted);
client.getarvindNewsAsync();
}
void client_getarvindNewsCompleted(object sender, KejriwalService.getarvindNewsCompletedEventArgs e)
{
string result = e.Result.ToString();
List<Newss> listData = new List<Newss>();
XDocument doc = XDocument.Parse(result);
foreach (var location in doc.Descendants("UserDetails"))
{
Newss data = new Newss();
data.News_Title = location.Element("News_Title").Value;
data.Date_Start = location.Element("Date_Start").Value;
listData.Add(data);
}
listBox1.ItemsSource = listData;
}
}
Xml String:
<NewDataSet>
<UserDetails>
<id>11</id>
<News_Title>Disciplinary Action against Vinod Binny</News_Title>
<News_Description>The Aam Aadmi Party formed a disciplinary committee, on 19-Jan-2013, headed by Pankaj Gupta to look into the matter of Vinod Kumar Binny. The other members of the committee included Ashish Talwar, Illyas Azmi, Yogendra Yadav and Gopal Rai.
This disciplinary committee has decided to expel Vinod Kumar Binny and terminate his primary membership from the party, for publicly making false statements against the party and its leadership, thereby bringing disrepute to the party. A letter to the same end has been issued to Vinod Kumar Binny.</News_Description>
<Date_Start>2014-01-29</Date_Start>
<image_path>news.png</image_path>
Can anyone help me in displaying the images for each field.
The image path is an http url
http://political-leader.vzons.com/ArvindKejriwal/images/uploaded/news.png

If i guess right your Image_Path is a http url . so you need to BitmapImage to bind as a ImageSource. may this will help you.
public class Newss
{
public string News_Title { get; set; }
public string News_Description { get; set; }
public string Date_Start { get; set; }
**//Edits**
public string image_path {get;set}
public BitmapImage ImageBind{get;set;}
}
foreach (var location in doc.Descendants("UserDetails"))
{
Newss data = new Newss();
data.News_Title = location.Element("News_Title").Value;
data.Date_Start = location.Element("Date_Start").Value;
**//Edits**
data.image_path = location.Element("Image_Path").Value;
data.ImageBind = new BitmapImage(new Uri( #"http://political-leader.vzons.com/ArvindKejriwal/images/uploaded/"+data.image_path, UriKind.Absolute)
listData.Add(data);
}
**Your xaml changes**
<Image Source="{Binding ImageBind }" />

How do I display images from back office in windows phone 7 application?

I am building my first app in windows phone 7. I need to show some data from web service along with an image. I am able to show the data but do not know how to display the images. New data can be entered which needs to be updated. The image will come from backoffice and the path will come from web service. My web service is:
<string><NewDataSet>
<UserDetails>
<id>5</id>
<News_Title>Audit of Electricity Companies</News_Title>
<News_Description> Rejecting the contention of private power distributors, the Delhi government today ordered an audit of their finances by the government's national auditor or Comptroller and Auditor General (CAG), fulfilling yet another election promise of the Aam Aadmi Party.
</News_Description>
<Date_Start>2014-01-03</Date_Start>
<image_path>news.png</image_path>
</UserDetails>
There will be more than 1 data. I am able to show news_Title, news_description, Date_start. My cs code is
public class Newss
{
public string News_Title { get; set; }
public string News_Description { get; set; }
public string Date_Start { get; set; }
}
public News()
{
InitializeComponent();
KejriwalService.aapSoapClient client = new KejriwalService.aapSoapClient();
client.getarvindNewsCompleted += new EventHandler<KejriwalService.getarvindNewsCompletedEventArgs>(client_getarvindNewsCompleted);
client.getarvindNewsAsync();
}
void client_getarvindNewsCompleted(object sender, KejriwalService.getarvindNewsCompletedEventArgs e)
{
string result = e.Result.ToString();
List<Newss> listData = new List<Newss>();
XDocument doc = XDocument.Parse(result);
// Just as an example of using the namespace...
//var b = doc.Element("NewDataSet").Value;
foreach (var location in doc.Descendants("UserDetails"))
{
Newss data = new Newss();
data.News_Title = location.Element("News_Title").Value;
// data.News_Description = location.Element("News_Description").Value;
data.Date_Start = location.Element("Date_Start").Value;
listData.Add(data);
}
listBox1.ItemsSource = listData;
}
My xaml file is
<ScrollViewer Margin="12,17,-12,144" HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Auto" AllowDrop="False" ManipulationMode="Control">
<ListBox Name="listBox1" Margin="38,86,38,562">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=News_Title}"></TextBlock>
<TextBlock Text="{Binding Path=News_Description}"></TextBlock>
<TextBlock Text="{Binding Path=Date_Start}"></TextBlock>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</ScrollViewer>

Add this to your model
public class Newss
{
public string News_Title { get; set; }
public string News_Description { get; set; }
public string Date_Start { get; set; }
public string Image_Path { get; set; }
}
Set the image property in your foreach loop
foreach (var location in doc.Descendants("UserDetails"))
{
Newss data = new Newss();
data.News_Title = location.Element("News_Title").Value;
// data.News_Description = location.Element("News_Description").Value;
data.Date_Start = location.Element("Date_Start").Value;
Newss.Image_Path = location.Element("image_path").Value
listData.Add(data);
}
In your Xaml
<ScrollViewer Margin="12,17,-12,144" HorizontalScrollBarVisibility="Visible" VerticalScrollBarVisibility="Auto" AllowDrop="False" ManipulationMode="Control">
<ListBox Name="listBox1" Margin="38,86,38,562">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=News_Title}"></TextBlock>
<TextBlock Text="{Binding Path=News_Description}"></TextBlock>
<TextBlock Text="{Binding Path=Date_Start}"></TextBlock>
<Image Source="{Binding Path=Image_Path}" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</ScrollViewer>
And obviously, ensure that the Image_Path data from your xml payload is a valid uri, i would start by setting it to a static image such as "http://static.bbci.co.uk/frameworks/barlesque/2.59.4/orb/4/img/bbc-blocks-dark.png"

How to display images in ListView in Win8

The problem:
There is no images being displayed.Please help to correct my mistake. Thanks
1) I have stored the photo in a folder called Images and marked the photo as content
2) I have created a class and added it in the project
class ModelImage
{
public string Image_Name { get; set; }
public string Image { get; set; }
public string Description { get; set; }
}
3) I have added the ListView and a Button in MainPage
<ListView Name="LV" ItemsSource="{Binding}" HorizontalAlignment="Left" Height="552" Margin="693,27,0,0" Grid.Row="1" VerticalAlignment="Top" Width="582">
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock FontSize="30" Text="Hello">
<Image Source="{Binding Image}" Height="300" Width="300">
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
--- Button
private void Button_Click_1(object sender, RoutedEventArgs e)
{
List <ModelImage> list = new List <ModelImage>();
{
new ModelImage { Image_Name = "Meat", Image = "/Images/Meat_ProkChop.jpg", Description = "Pork Chop" };
new ModelImage { Image_Name = "Meat", Image = "/Images/Meat_Beef.jpg", Description = "Beef" };
};
LV.DataContext = list;
}
Do I need to use the hardcode Path for the photo inside the folder called Images?

Try "ms-appx:///Images/Image.jpg" instead of "/Images/Image.jpg". Getting the path right is important. Since it is default, this is likely correct already, but ensure your images are marked as "Content" in properties.
Best of luck!

Data Binding Bing Maps pushpin

I'm having a bit of trouble extracting some information I need when I pass a data binding in Xaml for a windows 8 app.
I have a default template designed in the app.xaml here:
<DataTemplate x:Key="PinTemplate">
<bm:Pushpin Name="{Binding img}" IsTapEnabled="True" >
<bm:MapLayer.Position>
<bm:Location Latitude="{Binding Latitude}" Longitude="{Binding Longitude}" />
</bm:MapLayer.Position>
</bm:Pushpin>
</DataTemplate>
I want to access the individual "img" strings from the binding above. On my map I have an itemcontrol embedded like so:
<Maps:Map Name="london" HorizontalAlignment="Left" Height="546" Margin="78,34,0,0" Grid.Row="1" VerticalAlignment="Top" Width="806" Credentials="{StaticResource BingCredentials}" RenderTransformOrigin="0.439,0.282">
<Maps:Pushpin Name="myPin" Height="100" Width="100"/>
<Maps:MapItemsControl ItemTemplate="{StaticResource PinTemplate}" ItemsSource="{Binding PushpinCollection}" Height="100" Width="100" Tapped="pushPin_Tapped"/>
<Popup VerticalOffset="200" HorizontalOffset="300" x:Name="Image" IsLightDismissEnabled="True" Height="2000" Width="2000" >
<Image Name="myImage" Height="300" Width="300" Source="Assets/Logo.png"/>
</Popup>
</Maps:Map>
And the c# behind it is:
public class PushpinModel
{
public double Longitude { get; set; }
public double Latitude { get; set; }
public string img { get; set; }
}
public ObservableCollection<PushpinModel> PushpinCollection { get; set; }
PushpinCollection = new ObservableCollection<PushpinModel>();
PushpinCollection.Add(new PushpinModel() { Latitude = templat[0], Longitude = templng[0], img = names[0] });
PushpinCollection.Add(new PushpinModel() { Latitude = templat[1], Longitude = templng[1], img = names[1] });
DataContext = this;
As it stands now I have an action control "Tapped" on the MapsItemcontrol which works properly, it creates a popup and displays a picture. However I would like to pass the information in img to the action controller so that I can specify which image to display in specific pushpins. I tried to do it like below but I think it the data context it returns is for the itemscontrol as a whole, how do I access the properties within the data template for each individual instance of pushpincollection? Thanks
private void pushPin_Tapped(object sender, TappedRoutedEventArgs e)
{
if (!Image.IsOpen) { Image.IsOpen = true; }
var pushpinData = (sender as Pushpin).DataContext as PushpinModel;
String file = pushpinData.ToString();
// use image in popup here
}

Try
var pushpinData = (sender as FrameworkElement).DataContext as PushpinModel;
That's how I usually do it, cause you don't always know what the sender type is but to me it seems it is the Pushpin..