/// <summary>
/// Attempts to inject query string parameters from the view into the view model.
/// </summary>
/// <param name="viewModel"> The view model.</param>
/// <param name="parameter"> The parameter.</param>
protected virtual void TryInjectParameters(object viewModel, object parameter)
{
var viewModelType = viewModel.GetType();
var stringParameter = parameter as string;
var dictionaryParameter = parameter as IDictionary <string, object>;
if (stringParameter != null && stringParameter.StartsWith("caliburn://"))
{
var uri = new Uri(stringParameter);
if (!String.IsNullOrEmpty(uri.Query))
{
var decorder = new WwwFormUrlDecoder(uri.Query);
foreach (var pair in decorder)
{
var property = viewModelType.GetPropertyCaseInsensitive(pair.Name);
if (property == null)
{
continue;
}
property.SetValue(viewModel, MessageBinder.CoerceValue(property.PropertyType, pair.Value, null));
}
}
}
else if (dictionaryParameter != null)
{
foreach (var pair in dictionaryParameter)
{
var property = viewModelType.GetPropertyCaseInsensitive(pair.Key);
if (property == null)
{
continue;
}
property.SetValue(viewModel, MessageBinder.CoerceValue(property.PropertyType, pair.Value, null));
}
}
else
{
var property = viewModelType.GetPropertyCaseInsensitive("Parameter");
if (property == null)
{
return;
}
property.SetValue(viewModel, MessageBinder.CoerceValue(property.PropertyType, parameter, null));
}
}
/// <summary>
/// A static helper that can be used as prepare action in order to inject a parameter into the target view model
/// </summary>
/// <param name="target">The target view model</param>
/// <param name="parameter">The parameter value to be injected.</param>
/// <param name="propertyName">The name of the property to inject to.</param>
public static void TryInjectParameter(object target, object parameter, string propertyName = "Parameter")
{
var viewModelType = target.GetType();
var property = viewModelType.GetPropertyCaseInsensitive(propertyName);
if (property == null)
{
return;
}
#if SILVERLIGHT
property.SetValue(target, MessageBinder.CoerceValue(property.PropertyType, parameter, null), null);
#else
property.SetValue(target, MessageBinder.CoerceValue(property.PropertyType, parameter, null));
#endif
}
/// <summary>
/// Attempts to inject query string parameters from the view into the view model.
/// </summary>
/// <param name="viewModel"> The view model. </param>
/// <param name="page"> The page. </param>
protected virtual void TryInjectQueryString(object viewModel, Page page)
{
var viewModelType = viewModel.GetType();
foreach (var pair in page.NavigationContext.QueryString)
{
var property = viewModelType.GetPropertyCaseInsensitive(pair.Key);
if (property == null)
{
continue;
}
property.SetValue(
viewModel,
MessageBinder.CoerceValue(property.PropertyType, pair.Value, page.NavigationContext),
null
);
}
}