public static CommandBindingExpression GetExtensionCommand(this DotvvmControl control, string methodUsageId)
{
var propertyName = control.GetType().FullName + "/" + methodUsageId;
var property = DotvvmProperty.ResolveProperty(typeof(PropertyBox), propertyName);
return(control.GetCommandBinding(property) as CommandBindingExpression);
}
public static CommandBindingExpression?GetExtensionCommand(this DotvvmControl control, string methodUsageId)
{
var propertyName = control.GetType().FullName + "/" + methodUsageId;
var property = DotvvmProperty.ResolveProperty(typeof(PropertyBox), propertyName);
if (property is null)
{
throw new Exception($"Extension command {propertyName} has not been registered.");
}
return(control.GetCommandBinding(property) as CommandBindingExpression);
}
public static CommandBindingExpression RegisterExtensionCommand(this DotvvmControl control, Delegate action, string methodUsageId)
{
var bindingService = control.GetValue(Internal.RequestContextProperty).CastTo <IDotvvmRequestContext>()
.Configuration.ServiceProvider.GetRequiredService <BindingCompilationService>();
var id = control.GetDotvvmUniqueId() + methodUsageId;
var propertyName = control.GetType().FullName + "/" + methodUsageId;
var property = DotvvmProperty.ResolveProperty(typeof(PropertyBox), propertyName) ?? DotvvmProperty.Register(propertyName, typeof(object), typeof(PropertyBox), null, false, null, typeof(PropertyBox), throwOnDuplicitRegistration: false);
var binding = new CommandBindingExpression(bindingService, action, id);
control.SetBinding(property, binding);
return(binding);
}
public override Type GetChildDataContextType(Type dataContext, DataContextStack controlContextStack, ResolvedControl control, DotvvmProperty dproperty = null)
{
var property = DotvvmProperty.ResolveProperty(control.Metadata.Type, PropertyName);
ResolvedPropertySetter propertyValue;
if (control.Properties.TryGetValue(property, out propertyValue))
{
var binding = propertyValue as ResolvedPropertyBinding;
if (binding == null)
{
return(dataContext);
}
return(binding.Binding.GetExpression().Type);
}
else
{
return(dataContext);
}
}