In WPF there is no PropertyViewer control, but if your need is simply to show a read-only list of all properties of an object, for dump purpose, you can obtain this with few lines of code. First of all write a special IValueConverter.
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| [ValueConversion(typeof(Object), typeof(ObservableCollection<PropertyInfo>))]
public class PropertyViewerConverter : IValueConverter
{
public class PropertyInfo
{
public String PropertyName { get; private set; }
public String PropertyValue { get; private set; }
public PropertyInfo(string propertyName, string propertyValue)
{
PropertyName = propertyName;
PropertyValue = propertyValue;
}
}
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
var retvalue = new ObservableCollection<PropertyInfo>();
if (value != null)
{
var properties = value.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (var propertyInfo in properties)
{ PropertyInfo info;
try
{
object pvalue = propertyInfo.GetValue(value, new object[] { }) ?? "Null";
info = new PropertyInfo(propertyInfo.Name, pvalue.ToString());
}
catch (Exception ex)
{
info = new PropertyInfo(propertyInfo.Name, "Exception " + ex.Message);
}
retvalue.Add(info);
}
}
return retvalue;
}
public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
throw new NotImplementedException();
}
}
|
The code is straightforward, the converter accepts an object and return an ObservableCollection of PropertyInfo, where propertyinfo is a simple class declared in the converter to hold name and value of the property. You can use this converter in a really simple way.
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| <ListView ItemsSource="{Binding SearchParam, Converter={StaticResource pvc}}">
<ListView.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" >
<Label Content="{Binding PropertyName}" Width="200"/>
<Label Content="{Binding PropertyValue}" />
</StackPanel>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
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In the above code I used a Listview bound to a property of the viewmodel called SearchParam that is a complex object with many properties, and thanks to the Converter I’m able to obtain a list of propertyname-propertyvalue that I can show simply with two labels.
Clearly if you need a real property editor you can check Wpf Property Grid control, or WPF property grid, both of them are open source.
Alk.
Tags: Wpf
