public override Type?GetChildDataContextType(Type dataContext, DataContextStack controlContextStack, DotvvmBindableObject control, DotvvmProperty?property = null)
{
var controlType = control.GetType();
var controlPropertyField = controlType.GetField($"{PropertyName}Property", BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy);
var controlProperty = (DotvvmProperty?)controlPropertyField?.GetValue(null);
if (controlProperty == null)
{
throw new Exception($"The property '{PropertyName}' was not found on control '{controlType}'!");
}
if (control.properties.Contains(controlProperty))
{
return(control.GetValueBinding(controlProperty) is IValueBinding valueBinding
? valueBinding.ResultType
: dataContext);
}
if (AllowMissingProperty)
{
return(dataContext);
}
throw new Exception($"Property '{PropertyName}' is required on '{controlType.Name}'.");
}
public static void CopyProperty(DotvvmBindableObject source, DotvvmProperty sourceProperty, DotvvmBindableObject target, DotvvmProperty targetProperty)
{
var binding = source.GetValueBinding(sourceProperty);
if (binding != null)
{
target.SetBinding(targetProperty, binding);
}
else
{
target.SetValue(targetProperty, source.GetValue(sourceProperty));
}
}
public override Type GetChildDataContextType(Type dataContext, DataContextStack controlContextStack, DotvvmBindableObject control, DotvvmProperty property = null)
{
var controlType = control.GetType();
var controlPropertyField = controlType.GetField($"{PropertyName}Property", BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy);
var controlProperty = (DotvvmProperty)controlPropertyField?.GetValue(null);
if (controlProperty == null)
{
throw new Exception($"The property '{PropertyName}' was not found on control '{controlType}'!");
}
if (control.Properties.ContainsKey(controlProperty) && control.HasValueBinding(controlProperty))
{
return(control.GetValueBinding(controlProperty).ResultType);
}
return(controlProperty.PropertyType);
}
/// <summary>
/// Processes the control tree.
/// </summary>
private void ProcessControlTreeCore(DotvvmBindableObject control, Action <DotvvmBindableObject> action)
{
// if there is a DataContext binding, locate the correct token
var hasDataContext = false;
var pathValue = control.GetValue(Internal.PathFragmentProperty, false);
if (pathValue != null)
{
CurrentPath.Push(pathValue as string);
RefreshCurrentPathArray();
hasDataContext = true;
}
else
{
var binding = control.GetValueBinding(DotvvmBindableObject.DataContextProperty, false);
if (binding != null)
{
CurrentPath.Push(binding.GetKnockoutBindingExpression());
RefreshCurrentPathArray();
hasDataContext = true;
}
}
action(control);
// go through all children
foreach (var child in control.GetLogicalChildren())
{
ProcessControlTreeCore(child, action);
}
if (hasDataContext)
{
CurrentPath.Pop();
RefreshCurrentPathArray();
}
}
/// <summary>
/// Processes the control tree.
/// </summary>
private void ProcessControlTreeCore(DotvvmBindableObject control, Action<DotvvmBindableObject> action)
{
// if there is a DataContext binding, locate the correct token
var hasDataContext = false;
var pathValue = control.GetValue(Internal.PathFragmentProperty, false);
if (pathValue != null)
{
CurrentPath.Push(pathValue as string);
RefreshCurrentPathArray();
hasDataContext = true;
}
else
{
var binding = control.GetValueBinding(DotvvmBindableObject.DataContextProperty, false);
if (binding != null)
{
CurrentPath.Push(binding.GetKnockoutBindingExpression());
RefreshCurrentPathArray();
hasDataContext = true;
}
}
action(control);
// go through all children
foreach (var child in control.GetLogicalChildren())
{
ProcessControlTreeCore(child, action);
}
if (hasDataContext)
{
CurrentPath.Pop();
RefreshCurrentPathArray();
}
}
public IValueBinding GetValueBinding(string key) => control.GetValueBinding(group.GetDotvvmProperty(key));
public static DataContextStack GetItemDataContextStack(this DotvvmBindableObject bindableObject, DotvvmProperty dataSourceProperty)
{
return(bindableObject.GetValueBinding(dataSourceProperty)
?.GetProperty <CollectionElementDataContextBindingProperty>()?.DataContext);
}