public override Type GetChildDataContextType(Type dataContext, Type parentDataContext, RedwoodControl control)
{
var type = control.GetType();
var property = type.GetProperty(PropertyName);
if (property == null) throw new Exception($"property { PropertyName } does not exists on { type.FullName }.");
return property.GetValue(control).GetType();
}
public static Type GetDataContextType(Type parentDataContext, RedwoodControl control)
{
var dataContext = (control as RedwoodBindableControl)?.DataContext?.GetType() ?? parentDataContext;
var attributes = control.GetType().GetCustomAttributes<DataContextChangeAttribute>();
foreach (var attribute in attributes)
{
dataContext = attribute.GetChildDataContextType(dataContext, parentDataContext, control);
}
return dataContext;
}
/// <summary>
/// Finds the method on control.
/// </summary>
private static MethodInfo FindMethodOnControl(RedwoodControl targetControl, InvocationExpressionSyntax node)
{
MethodInfo method;
var methods = targetControl.GetType().GetMethods().Where(m => m.Name == node.Expression.ToString()).ToList();
if (methods.Count == 0)
{
throw new Exception(string.Format("The control '{0}' does not have a function '{1}'!", targetControl.GetType().FullName, node.Expression));
}
else if (methods.Count > 1)
{
throw new Exception(string.Format("The control '{0}' has more than one function called '{1}'! Overloading in {{controlCommand: ...}} binding is not yet supported!", targetControl.GetType().FullName, node.Expression));
}
method = methods[0];
return method;
}