/// <summary>
/// Saves the state of the control.
/// </summary>
public void SaveControlState(JToken viewModelToken, DotvvmControl control)
{
if (control is DotvvmBindableControl && ((DotvvmBindableControl)control).RequiresControlState)
{
// find the control state collection
var controlStateCollection = viewModelToken["$controlState"];
if (controlStateCollection == null)
{
controlStateCollection = new JObject();
((JObject)viewModelToken).Add("$controlState", controlStateCollection);
}
// find the control state item
control.EnsureControlHasId();
var controlState = controlStateCollection[control.ID] as JObject;
if (controlState == null)
{
controlState = new JObject();
((JObject)controlStateCollection).Add(control.ID, controlState);
}
// serialize the property values
foreach (var item in ((DotvvmBindableControl)control).ControlState.Where(v => v.Value != null))
{
controlState.Add(item.Key, JToken.FromObject(item.Value));
controlState.Add(item.Key + "$type", JToken.FromObject(item.Value.GetType()));
}
}
}
public static CommandBindingExpression RegisterExtensionCommand(this DotvvmControl control, Delegate action, string methodUsageId)
{
control.EnsureControlHasId();
var id = control.ID + methodUsageId;
var propertyName = control.GetType().FullName + "/" + methodUsageId;
var property = DotvvmProperty.Register <object, ExtensionCommands>(propertyName);
var binding = new CommandBindingExpression(action, id);
control.SetBinding(property, binding);
return(binding);
}
/// <summary>
/// Loads the state of the control.
/// </summary>
public void LoadControlState(JToken viewModelToken, DotvvmControl control)
{
if (control is DotvvmBindableControl && ((DotvvmBindableControl)control).RequiresControlState)
{
// find the control state
var controlStateCollection = viewModelToken["$controlState"];
if (controlStateCollection != null)
{
control.EnsureControlHasId();
var controlState = controlStateCollection[control.ID] as JObject;
if (controlState != null)
{
// fill the collection with property values
foreach (var item in controlState.Properties().Where(p => !p.Name.EndsWith("$type")))
{
var type = Type.GetType(controlState[item.Name + "$type"].Value <string>());
((DotvvmBindableControl)control).ControlState[item.Name] = item.Value.ToObject(type);
}
}
}
}
}