public BindingManager <TViewModel> Bind <T>(Expression <Func <TViewModel, T> > sourceExpr, Action <T> setterDelegate)
{
if (!(sourceExpr.Body is MemberExpression member))
{
throw new ArgumentException($"Expression '{sourceExpr.Name}' refers to a method, not a property.");
}
var propInfo = member.Member as PropertyInfo;
if (propInfo == null)
{
throw new ArgumentException($"Expression '{sourceExpr.Name}' refers to a field, not a property.");
}
if (propInfo.ReflectedType == null ||
typeof(TViewModel) != propInfo.ReflectedType &&
!typeof(TViewModel).IsSubclassOf(propInfo.ReflectedType))
{
throw new ArgumentException(
$"Expresion '{sourceExpr}' refers to a property that is not from type {typeof(TViewModel).Name}.");
}
var sourceGetter = sourceExpr.Compile();
PropertyBindings.Add(propInfo.Name, new PropertyChangedHandler <TViewModel>(SynchronizationContext.Current,
vm =>
{
var val = sourceGetter.Invoke(vm);
setterDelegate.Invoke(val);
}));
return(this);
}
internal AjaxBase(System.Web.UI.Control control, HttpContext context)
{
if (!(control is IAjaxControl))
{
throw new System.InvalidOperationException();
}
_control = control;
_properties = WebBindable.Properties(_control.GetType());
_context = context;
_bindings = new PropertyBindings((IAjaxControl)_control);
}
/// <summary>
/// String of name=value pairs representing server-side parameters
/// </summary>
/// <param name="properties">array of bindable control properties</param>
/// <param name="bindings">list of DOM property bindings</param>
static internal string[] PropertyLists(PropertyInfo[] properties,
PropertyBindings bindings, IAjaxControl control)
{
// bound dynamic parameters
StringBuilder boundList = new StringBuilder();
// static parameters
StringBuilder staticList = new StringBuilder();
string pair;
Regex empty = new Regex("^0|null|\\[\\]$");
Type attributeType = typeof(WebBindable);
foreach (PropertyInfo p in properties)
{
if (p.CanRead)
{
pair = string.Format("\"{0}={{0}}\",", p.Name);
if (bindings.Contains(p))
{
boundList.AppendFormat(pair, bindings[p]);
}
else
{
string value = p.GetValue(control, null).ToJSON();
if (!string.IsNullOrEmpty(value) && !empty.IsMatch(value))
{
value = value.Trim('"');
}
else if (WebBindable.AlwaysBind(p))
{
// always bindable properties are scripted even if null
value = EcmaScript.Null;
}
else
{
// ignore this property
continue;
}
staticList.AppendFormat(pair, value);
}
}
}
if (boundList.Length > 2)
{
boundList.Length -= 1;
} // remove trailing comma
staticList.AppendFormat("\"id={0}\"", control.ID);
return(new string[] { staticList.ToString(), boundList.ToString() });
}
private void ViewModelOnPropertyChanged(object sender, PropertyChangedEventArgs eventArgs)
{
if (string.IsNullOrWhiteSpace(eventArgs.PropertyName))
{
return;
}
if (!PropertyBindings.ContainsKey(eventArgs.PropertyName))
{
return;
}
var handler = PropertyBindings[eventArgs.PropertyName];
handler.Execute((TViewModel)sender);
}
public ActivityInfo AddPropertyBinding([NotNull] PropertyBindingInfo binding)
{
PropertyBindings.Add(binding.NotNull());
return(this);
}
