Seems you need literally all the steps explained. So, here's how I changed my XAML into what you suggested: This needs to be a valid value that the ColorConverter actually understands such as for example '000'. I don't think that it's returning a valid Brush. c wpf xaml ivalueconverter wpf-extended-toolkit. It's something about the converter I think.Ĭonsole.WriteLine("ColorConverter Convert Exception: " + ex.Message) It is interesting that if I set the background color in XAML without a converter, the color does change (just not every row). I just don't see where the error is? Any clues? The Fill property takes a Brush object, so. I believe I used exactly what you suggested. The color value is databound to a Rectangle object's Fill property. Just adjust your HierarchicalDataTemplate design for your TreeView and you should do fine.īummer! I have to figure this out. You do not have to worry since you do not have ui virtualization enabled. I tried it with virtualization enabled just out of interest and sometimes TreeView applies wrong container to wrong place so things get messy (nr 15 and 16). Magnus solution with static int value gets the job done and works as long the TreeView doesn't start virtualizing items. Lets face it, it looks ugly, but at least it works and background is being changed. Resources> I couldn't test your code so I copy pasted few snippets from Magnus code. WPF application.Net Framework 4.72-I've got a converter that I added to a xaml file, but the xaml designer is telling me this: The name 'BoolToColorConverter' does not exist in the namespace 'clr-namespace:WpfCommon.Converters assemblyWpfCommon' As you can see by the code below, it DOES exist in the namespace. This namespace is defined in the XAML to use the cnv prefix like this. It seems to me your HierarchicalDataTemplate is wrong.Ĭonsider changing the HierarchicalDataTemplate. Public object ConvertBack(object value, Type targetType, object parameter, culture) Public object Convert(object value, Type targetType, object parameter, culture) Public object Convert(object value, Type targetType, object parameter, 's unclear what colour you mean but if you for example want to have alternating background colours for the nodes, you could use a converter: class ColorConverter : IValueConverter If you want to avoid boxing, build a dictionary up to start with for the standard names (still using ColorConverter) and then use the dictionary for subsequent lookups. Call ColorConverter.ConvertFromString and cast the result. You should use a DataTrigger and bind to the source property (bindNumber). Of course, ColorConverter is the way to go. That would encapsulate such logic and expose a brush property to bind the foreground to. The way I would handle this would be to have a viewmodel per row. Declaration public object Convert(object value, Type targetType, object parameter, CultureInfo culture) Parameters Returns ConvertBack (Object, Type, Object, CultureInfo) Converts a value. The important bit is to realise you need a converter. public ColorConverter() Methods Convert (Object, Type, Object, CultureInfo) Converts a value. Since I don't have a datagrid and a class with a bindCisloZmluvy to hand, this is just air code.But you might prefer a double or whatever instead anyhow. Public object Convert(object value, Type targetType, object parameter, CultureInfo culture)Public static readonly IValueConverter Instance = new IsLessThanConverter() Triggers only work on equality, you need a converter.Īssuming you're entering an integer: public class IsLessThanConverter : IValueConverter
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