/// <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.GetRuntimeProperty(pair.Name);
if (property == null)
{
continue;
}
property.SetValue(viewModel,
ParameterBinder.CoerceValue(property.PropertyType, pair.Value));
}
}
}
else if (dictionaryParameter != null)
{
foreach (var pair in dictionaryParameter)
{
var property = viewModelType.GetRuntimeProperty(pair.Key);
if (property == null)
{
continue;
}
property.SetValue(viewModel,
ParameterBinder.CoerceValue(property.PropertyType, pair.Value));
}
}
else
{
var property = viewModelType.GetRuntimeProperty("Parameter");
if (property == null)
{
return;
}
property.SetValue(viewModel,
ParameterBinder.CoerceValue(property.PropertyType, parameter));
}
}
private object[] DetermineParameters(MethodBase method, object eventArgs = null)
{
var requiredParameters = method.GetParameters();
if (requiredParameters.Length == 0)
{
return(new object[0]);
}
var parameterValues = Parameters.Select(x => ((Parameter)x).Value).ToArray();
if (requiredParameters.Length != parameterValues.Length)
{
throw new InvalidOperationException(string.Format("Inconsistent number of parameters for method {0}.", method.Name));
}
var context = (CoroutineExecutionContext)null;
for (var i = 0; i < requiredParameters.Length; i++)
{
var parameterType = requiredParameters[i].ParameterType;
var parameterValue = parameterValues[i];
var specialValue = parameterValue as ISpecialValue;
if (specialValue != null)
{
if (context == null)
{
context = new CoroutineExecutionContext
{
Source = AssociatedObject,
Target = Target,
EventArgs = eventArgs,
}
}
;
parameterValue = specialValue.Resolve(context);
}
parameterValues[i] = ParameterBinder.CoerceValue(parameterType, parameterValue);
}
return(parameterValues);
}
private TParameter CoerceParameter(object parameter)
{
if (parameter == null)
{
return(default(TParameter));
}
var specialValue = parameter as ISpecialValue;
if (specialValue != null)
{
parameter = specialValue.Resolve(new CoroutineExecutionContext());
}
if (parameter is TParameter)
{
return((TParameter)parameter);
}
return((TParameter)ParameterBinder.CoerceValue(typeof(TParameter), parameter));
}