I'm new on Windows phone and silverlight development. During my learning exercises i have encountered an error which is i mentioned on the title of this post.
My main goal is saving and retrieving the image file to the SQLCE database, and i have used this tutorial http://antonswanevelder.com/2011/10/28/writing-an-image-to-sql-ce-linq-to-sql/
However, i had a problem with this code snippet
<Image Source="{Binding ItemImage, Converter={StaticResource ImageConverter}}" Stretch="UniformToFill"/>
My idea is compiler cannot locate the resouce ImageConverter. I really need a help on this.
My code is: MainPage.xaml
<phone:PhoneApplicationPage.Resources>
<DataTemplate x:Key="CallListListBoxItemTemplate">
<StackPanel Orientation="Vertical">
<TextBlock Text="{Binding CallName}" Foreground="DarkCyan" FontSize="{StaticResource PhoneFontSizeLarge}"
VerticalAlignment="Top" Margin="12,12,0,0"/>
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="PersonalInfoListBoxItemTemplate">
<Grid >
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<Image Source="{Binding PersonImage, Converter={StaticResource ImageConverters}}" Stretch="UniformToFill" Name="_personPhoto" />
MainPage.xaml.cs
public class ImageConverters : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (value is byte[])
{
MemoryStream ms = new MemoryStream(value as byte[]);
WriteableBitmap wb = PictureDecoder.DecodeJpeg(ms, 100, 100);
return wb;
}
else
{
return null;
}
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
Let's consider your value converter locates in ProjectName.Converters
namespace.
In xaml you need to add a namespace:
<phone.PhoneApplicatinPage
.. all your code here
xmlns:converters="clr-namespace;ProjectName.Converters"
>
and in Resources tag:
<phone:PhoneApplicationPage.Resources>
<converters:ImageConverters x:Key="ImageConverter"/>
<!- your DataTemplates here-->
And small tutorial to make you more familiar with IValueConverter
here