void BindField(string key, IModelValueProvider provider, object model, PropertyInfo pi)
{
// Get converted value
var mv = GetModelValue(key, provider, pi);
if (mv == null)
return;
// Add to our collection of model values
ModelState.Values.Add(mv.Name, mv);
// Copy over errors too
foreach (var e in mv.Errors)
{
ModelState.Errors.Add(e);
}
// Apply the property value
if (mv.IsValid)
{
// Save the original value
mv.OriginalValue = pi.GetValue(model, null);
// Apply the new value
pi.SetValue(model, mv.ConvertedValue, null);
}
}
public bool TryUpdateModel(IModelValueProvider provider, object model)
{
// Build the list of fields to be updated
string[] field_list = BuildFieldList(provider, model);
if (field_list == null)
{
throw new InvalidOperationException("Can't bind model as value provider can't provide a valid list of fields and neither an include nor exclude list was provided");
}
// Update all property values
foreach (var f in field_list)
{
// Find the target property
object target;
PropertyInfo pi;
if (!ResolveField(model, f, out target, out pi))
{
throw new InvalidOperationException(string.Format("Can't bind field `{0}` to model of type `{1}`", f, model.GetType().FullName));
}
// Apply it's value
BindField(f, provider, target, pi);
}
return ModelState.IsValid;
}
public void UpdateModel(IModelDefinition definition, IModelValueProvider model, IModelValueGetter newState)
{
CopyModelValueProvider copy = new CopyModelValueProvider(definition, true);
copy.Update(model, newState);
Has = true;
Added?.Invoke();
}
private object GetLocalModelValue(IDictionary<string, object> documentHost, Statement statement, IModelValueProvider modelValueProvider, object model)
{
object value;
if (statement.Parameters.Count > 0)
{
if (statement.Parameters.Count == 1)
{
//check here first
if (modelValueProvider.GetValue(documentHost, model, statement.Parameters[0].Value, out value))
{
return value;
}
}
List<object> parameters = new List<object>();
foreach (var parameter in statement.Parameters)
{
if (modelValueProvider.GetValue(documentHost, model, parameter.Value, out value))
{
parameters.Add(value);
}
}
return parameters;
}
if (model != null)
{
//check DocumentHost next
//if (modelValueProvider.GetValue(documentHost, model, null, out value))
if (modelValueProvider.GetValue(documentHost, model, Parrot.Infrastructure.ValueType.Property, null, out value))
{
return value;
}
}
return model;
}
/// <summary>
/// Creates a new instance for <paramref name="modelDefinition"/> with custom innner value storage <paramref name="valueProvider"/>.
/// </summary>
/// <param name="modelDefinition">A definition of model.</param>
/// <param name="valueProvider">A custom inner value storage.</param>
public ObservableModel(IModelDefinition modelDefinition, IModelValueProvider valueProvider)
: base(valueProvider)
{
Ensure.NotNull(modelDefinition, "modelDefinition");
ModelDefinition = modelDefinition;
}
/// <summary>
/// Creates new instance that wraps <paramref name="innerSetter"/> and raises <see cref="INotifyPropertyChanged.PropertyChanged"/>.
/// </summary>
/// <param name="innerSetter">Inner provider.</param>
public ObservableModelValueProvider(IModelValueProvider innerProvider)
: base(innerProvider)
{
Ensure.NotNull(innerProvider, "innerProvider");
this.innerProvider = innerProvider;
}
public void UpdateModel(IModelDefinition definition, IModelValueProvider model, IModelValueGetter newState)
{
}
private object GetLocalModelValue(IDictionary <string, object> documentHost, Statement statement, IModelValueProvider modelValueProvider, object model)
{
object value;
if (statement.Parameters.Count > 0)
{
if (statement.Parameters.Count == 1)
{
//check here first
if (modelValueProvider.GetValue(documentHost, model, statement.Parameters[0].Value, out value))
{
return(value);
}
}
List <object> parameters = new List <object>();
foreach (var parameter in statement.Parameters)
{
if (modelValueProvider.GetValue(documentHost, model, parameter.Value, out value))
{
parameters.Add(value);
}
}
return(parameters);
}
if (model != null)
{
//check DocumentHost next
//if (modelValueProvider.GetValue(documentHost, model, null, out value))
if (modelValueProvider.GetValue(documentHost, model, Parrot.Infrastructure.ValueType.Property, null, out value))
{
return(value);
}
}
return(model);
}
ModelValue GetModelValue(string key, IModelValueProvider provider, PropertyInfo pi)
{
// Get the model value
var string_value = provider.GetValue(key);
if (string_value == null)
return null;
// Create the model value entry
var mv = new ModelValue();
mv.Name = key;
mv.InputValue = string_value;
// Convert to required type
if (pi.PropertyType != typeof(string))
{
try
{
mv.ConvertedValue = Convert.ChangeType(string_value, pi.PropertyType);
}
catch (Exception x)
{
mv.Errors.Add(new ModelStateError(pi.Name, string.Format("Can't convert '{0}' to {1} - {2}", string_value, pi.PropertyType.FullName, x.Message)));
}
}
else
{
mv.ConvertedValue = string_value;
}
return mv;
}
string[] BuildFieldList(IModelValueProvider provider, object model)
{
string[] fields = null;
// If an include list was passed, try to get it from the provider
// The HttpModelValueProvider uses the hidden field generated by the form
// to build a list of valid fields for binding
if (IncludeFields == null)
{
fields = provider.GetFieldList(model);
}
// If an exclude list was specified, apply it now
if (ExcludeFields != null)
{
// If we don't have an include list, start with the full list of properties on the model
if (fields == null)
fields = (from pi in model.GetType().GetProperties() select pi.Name).ToArray();
// Exclude specified fields
fields = (from f in fields where !ExcludeFields.Contains(f) select f).ToArray();
}
// Return the final field list
return fields;
}
