public static object GetValue(BindingExpression expression)
{
Type currentType = null;
if (expression == null)
{
return null;
}
object dataItem = expression.DataItem;
if (dataItem == null)
{
return null;
}
string bindingPath = expression.ParentBinding.Path.Path;
string[] properties = bindingPath.Split('.');
object currentObject = dataItem;
for (int i = 0; i < properties.Length; i++)
{
currentType = currentObject.GetType();
PropertyInfo property = currentType.GetProperty(properties[i]);
if (property == null)
{
currentObject = null;
break;
}
currentObject = property.GetValue(currentObject, null);
if (currentObject == null)
{
break;
}
}
return currentObject;
}
private static void RefreshBindingExpression(BindingExpression bindingExpression)
{
if (bindingExpression != null)
{
bindingExpression.UpdateSource();
}
}
static object GetContext(System.Windows.Data.BindingExpression binding, out string propertyName)
{
var context = binding.DataItem;
var allPathes = binding.ParentBinding.Path.Path.Split('.');
propertyName = "";
int i = 1;
foreach (var path in allPathes)
{
propertyName = path;
if (i != allPathes.Length)
{
if (context != null)
{
var property = context.GetType().GetProperty(path);
if (property == null)
{
throw new Exception($"{path} does not exist on {context.GetType().FullName}");
}
context = property.GetValue(context, null);
}
}
i++;
}
return(context);
}
/// <summary>
/// Parse metadata from a target FrameworkElement. This will cache the metadata on the element as an attached property.
/// </summary>
/// <param name="element">The target FrameworkElement to pull metadata from.</param>
/// <param name="forceUpdate">If set, will not pull metadata from cache.</param>
/// <param name="entity">The entity used.</param>
/// <param name="bindingExpression">The bindingExpression used.</param>
/// <returns>Returns the metadata associated with the element. Will be null if no metadata was found.</returns>
internal static ValidationMetadata ParseMetadata(FrameworkElement element, bool forceUpdate, out object entity, out BindingExpression bindingExpression)
{
entity = null;
bindingExpression = null;
if (element == null)
{
return null;
}
if (!forceUpdate)
{
ValidationMetadata existingVMD = element.GetValue(ValidationMetadataProperty) as ValidationMetadata;
if (existingVMD != null)
{
return existingVMD;
}
}
BindingExpression be = null;
FieldInfo[] fields = element.GetType().GetFields(BindingFlags.Static | BindingFlags.Public | BindingFlags.FlattenHierarchy);
foreach (FieldInfo field in fields)
{
if (field.FieldType == typeof(DependencyProperty))
{
// Found a dependency property
be = element.GetBindingExpression((DependencyProperty)field.GetValue(null));
if (be != null && be.ParentBinding != null && be.ParentBinding.Path != null)
{
// Found a BindingExpression, ensure it has valid data
entity = be.DataItem != null ? be.DataItem : element.DataContext;
if (entity != null)
{
if (be.ParentBinding.Mode == BindingMode.TwoWay)
{
bindingExpression = be;
// A twoway binding will be automatically chosen and the rest ignored
break;
}
// Perform an arbitrary sort on path (string), so the same dependency property is chosen consistently.
// Reflection ordering is not deterministic and if we just pick the first, we could be
// matched with different dependency properties depending on the run.
if (bindingExpression == null || string.Compare(be.ParentBinding.Path.Path, bindingExpression.ParentBinding.Path.Path, StringComparison.Ordinal) < 0)
{
bindingExpression = be;
}
}
}
}
}
if (bindingExpression != null)
{
ValidationMetadata newVMD = ParseMetadata(bindingExpression.ParentBinding.Path.Path, entity);
element.SetValue(ValidationMetadataProperty, newVMD);
return newVMD;
}
return null;
}
private void _selectionChanged(Object sender, SelectionChangedEventArgs e) {
if (this._bE == null) {
this._bE = this.GetBindingExpression(SelectedValueProperty);
} else {
if (this.GetBindingExpression(SelectedValueProperty) == null) {
this.SetBinding(SelectedValueProperty, this._bE.ParentBinding);
}
}
}
public static string GetTargetValue(BindingExpression expression)
{
Binding binding = CloneBinding(expression.ParentBinding, expression.DataItem);
binding.Mode = BindingMode.OneTime;
Dummy _dummy = new Dummy();
BindingOperations.SetBinding(_dummy, Dummy.TextProperty, binding);
BindingExpression newExpression = BindingOperations.GetBindingExpression(_dummy, Dummy.TextProperty);
string text = _dummy.GetValue(Dummy.TextProperty) as string;
return text;
}
/// <summary>
/// Initializes a new instance of the <see cref="ValidatorRule"/> class for a binding expression.
/// </summary>
/// <param name="bindingExpression">The expression to validate.</param>
public ValidatorRule(BindingExpression bindingExpression)
: base(ValidationStep.ConvertedProposedValue, false)
{
if (bindingExpression == null)
{
throw new ArgumentNullException("bindingExpression");
}
this.bindingExpression = bindingExpression;
}
public EditEventProperty()
{
InitializeComponent();
_appb = new EditPageSaveEditButton(this.ApplicationBar, VM);
_delete = new EditPageDeleteButton(ApplicationBar, VM);
_filterBinding = tbFilterString.GetBindingExpression(TextBox.TextProperty);
Observable.FromEventPattern(tbFilterString, "TextChanged")
.Subscribe(_ => _filterBinding.UpdateSource());
}
public static TestValidationError GetFor(BindingExpression expression)
{
var source = (UIElement)expression.ParentBinding.Source;
var match = Cache.SingleOrDefault(x => ReferenceEquals(x.Item1, source));
if (match != null)
{
return match.Item2;
}
var error = new TestValidationError(expression.ParentBinding);
Cache.Add(Tuple.Create(source, error));
return error;
}
public Control()
{
InitializeComponent();
ServiceController.Communicator.ConfigureDatabaseStepsOnChanged += Communicator_ConfigureDatabaseStepsOnChanged;
DataContext = data;
userNameTextBoxBinding = userNameTextBox.GetBindingExpression(TextBox.TextProperty);
passwordBoxBinding = passwordBox.GetBindingExpression(PasswordBoxExtension.PasswordProperty);
confirmPasswordBoxBinding = confirmPasswordBox.GetBindingExpression(PasswordBoxExtension.PasswordProperty);
serverIpAddressTextBoxBinding = serverIpAddressTextBox.GetBindingExpression(TextBox.TextProperty);
serverConfigurationGrid.DataContext = Communicator.ServiceController.Communicator.ActiveServer;
}
private void SetImmediate(DependencyObject target)
{
_target = target;
_bindingExpression = BindingOperations.GetBindingExpression(target, _property);
if (_bindingExpression == null)
throw new InvalidOperationException("Binding not found on " + target + " " + _property.Name + ".");
if (_bindingExpression.ParentBinding.UpdateSourceTrigger != UpdateSourceTrigger.Explicit)
throw new InvalidOperationException("Binding UpdateSourceTrigger must be set to Explicit.");
var descriptor = DependencyPropertyDescriptor.FromProperty(_property, target.GetType());
descriptor.AddValueChanged(target, (sender, e) => {
_timer.Stop();
_timer.Start();
});
}
static DispatcherTimer BuildTimer(object control, BindingExpression exp, int milliseconds)
{
var timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromMilliseconds(milliseconds);
timer.Tick += (sender, e) =>
{
exp.UpdateSource();
lock (Timers)
{
timer.Stop();
Timers.Remove(control);
}
};
return timer;
}
private void UpdateBindings()
{
BindingExpression[] expressions = new BindingExpression[]
{
rbPlayer1ControlHuman.GetBindingExpression(RadioButton.IsCheckedProperty),
rbPlayer1ControlComputer.GetBindingExpression(RadioButton.IsCheckedProperty),
rbPlayer1DifficultyEasy.GetBindingExpression(RadioButton.IsCheckedProperty),
rbPlayer1DifficultyNormal.GetBindingExpression(RadioButton.IsCheckedProperty),
rbPlayer1DifficultyHard.GetBindingExpression(RadioButton.IsCheckedProperty),
rbPlayer2ControlHuman.GetBindingExpression(RadioButton.IsCheckedProperty),
rbPlayer2ControlComputer.GetBindingExpression(RadioButton.IsCheckedProperty),
rbPlayer2DifficultyEasy.GetBindingExpression(RadioButton.IsCheckedProperty),
rbPlayer2DifficultyNormal.GetBindingExpression(RadioButton.IsCheckedProperty),
rbPlayer2DifficultyHard.GetBindingExpression(RadioButton.IsCheckedProperty)
};
foreach (var ex in expressions) ex.UpdateSource();
}
public static BindingExpressionBase SetBinding (DependencyObject target, DependencyProperty dp, BindingBase binding)
{
if (target == null)
throw new ArgumentNullException ("target");
if (dp == null)
throw new ArgumentNullException ("dp");
if (binding == null)
throw new ArgumentNullException ("binding");
if (dp == null)
throw new ArgumentNullException ("dp");
if (binding == null)
throw new ArgumentNullException ("binding");
BindingExpression e = new BindingExpression ((Binding) binding, target, dp);
target.SetValue (dp, e);
return e;
}
public IFilter GetFilter(BindingExpression be, DataGrid dg)
{
Type t = be.ResolvedSource.GetType();
String typeName = t.GetProperty(be.ResolvedSourcePropertyName).GetValue(be.ResolvedSource).GetType().ToString();
IFilter filter= null;
switch (typeName)
{
case "int":
break;
case "string":
break;
case "DateTime":
break;
default:
filter = new TextFilter();
break;
}
filter.Fill(be, dg);
return filter;
}
internal static LabelValidationMetadata ParseMetadata(FrameworkElement element, bool forceUpdate, out object entity, out BindingExpression bindingExpression)
{
entity = (object)null;
bindingExpression = (BindingExpression)null;
if (element == null)
return (LabelValidationMetadata)null;
if (!forceUpdate)
{
LabelValidationMetadata validationMetadata = element.GetValue(LabelValidationHelper.ValidationMetadataProperty) as LabelValidationMetadata;
if (validationMetadata != null)
return validationMetadata;
}
foreach (FieldInfo fieldInfo in element.GetType().GetFields(BindingFlags.Static | BindingFlags.Public | BindingFlags.FlattenHierarchy))
{
if (fieldInfo.FieldType == typeof(DependencyProperty))
{
BindingExpression bindingExpression1 = element.GetBindingExpression((DependencyProperty)fieldInfo.GetValue((object)null));
if (bindingExpression1 != null && bindingExpression1.ParentBinding != null && bindingExpression1.ParentBinding.Path != null)
{
entity = bindingExpression1.DataItem ?? element.DataContext;
if (entity != null)
{
if (bindingExpression1.ParentBinding.Mode == BindingMode.TwoWay)
{
bindingExpression = bindingExpression1;
break;
}
else if (bindingExpression == null || string.Compare(bindingExpression1.ParentBinding.Path.Path, bindingExpression.ParentBinding.Path.Path, StringComparison.Ordinal) < 0)
bindingExpression = bindingExpression1;
}
}
}
}
if (bindingExpression == null)
return null;
LabelValidationMetadata validationMetadata1 = ParseMetadata(bindingExpression.ParentBinding.Path.Path, entity);
element.SetValue(ValidationMetadataProperty, (object)validationMetadata1);
return validationMetadata1;
}
//-----------------------------------------------------
//
// Constructors
//
//-----------------------------------------------------
internal ClrBindingWorker(BindingExpression b, DataBindEngine engine) : base(b)
{
PropertyPath path = ParentBinding.Path;
if (ParentBinding.XPath != null)
{
path = PrepareXmlBinding(path);
}
if (path == null)
{
path = new PropertyPath(String.Empty);
}
if (ParentBinding.Path == null)
{
ParentBinding.UsePath(path);
}
_pathWorker = new PropertyPathWorker(path, this, IsDynamic, engine);
_pathWorker.SetTreeContext(ParentBindingExpression.TargetElementReference);
}
private void OnEnterNewEarningsKeyDown(object sender, KeyEventArgs e)
{
if (e.Key == Key.Return)
{
if (_bindingExpression != null)
{
_bindingExpression.UpdateSource();
}
else
{
TextBox tb = sender as TextBox;
if (tb != null)
{
_bindingExpression = BindingOperations.GetBindingExpression(tb, TextBox.TextProperty);
if (_bindingExpression != null)
{
_bindingExpression.UpdateSource();
}
}
}
}
}
public void Fill(BindingExpression be, DataGrid dg)
{
Type t = be.ResolvedSource.GetType();
List<string> str = new List<string>();
foreach (var obj in dg.Items)
{
if (obj.GetType().ToString().Contains("People"))
str.Add(t.GetProperty(be.ResolvedSourcePropertyName).GetValue(obj).ToString());
}
var colect = from strin in str group strin by strin into newGroup select newGroup;
FilterCollection = new List<ItemFilter>();
foreach (IGrouping<string, string> obj in colect)
{
FilterCollection.Add(new ItemFilter() { Name = obj.Key, IsCheked = true });
}
FilterCollection.Sort((a,b)=>a.Name.CompareTo(b.Name));
col.Source = FilterCollection;
Header = be.ResolvedSourcePropertyName;
}
internal ChangingValueHelper(BindingExpression b)
{
_bindingExpression = b;
b.CancelPendingTasks();
}
protected BindingWorker(BindingExpression b)
{
_bindingExpression = b;
}
// check if source needs to be updated
private bool HasDifferentValue(BindingExpression b)
{
var originObj = b.ResolvedSource;
var propName = b.ResolvedSourcePropertyName;
var originValue = originObj.GetType().GetProperty(propName).GetValue(originObj);
var currentValue = b.Target.GetValue(b.TargetProperty);
return originValue != currentValue;
}
internal ProposedValue(BindingExpression bindingExpression, object rawValue, object convertedValue)
{
_bindingExpression = bindingExpression;
_rawValue = rawValue;
_convertedValue = convertedValue;
}
internal static string GetCheckedPath(BindingExpression bindingExpression)
{
var pathText = bindingExpression.ParentBinding.Path.Path;
if (!pathValidationRegex.IsMatch(pathText))
{
throw new InvalidOperationException(
string.Format(
CultureInfo.CurrentCulture,
Resources.ExceptionComplexBindingPath,
pathText));
}
return pathText;
}
/// <summary>
/// Creates a new BindingInfo with the specified BindingExpression, BindingTarget and Element.
/// </summary>
/// <param name="bindingExpression">BindingExpression</param>
/// <param name="bindingTarget">BindingTarget</param>
/// <param name="element">Element</param>
public BindingInfo(BindingExpression bindingExpression, DependencyProperty bindingTarget, FrameworkElement element)
{
this.BindingExpression = bindingExpression;
this.BindingTarget = bindingTarget;
this.Element = element;
}
/// <summary>
/// Overridden. Applies the specified template.
/// </summary>
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
this.VerticalScrollBar = this.GetTemplateChild<ScrollBar>(VerticalScrollBarElementName, true);
this.NonDynamicRightAxisViewPort = this.GetTemplateChild<Canvas>(NonDynamicRightAxisViewPortElementName, true);
this.futureCanvas = this.GetTemplateChild<FrameworkElement>(FutureCanvasElementName, false);
if (this.PointTemplate == null)
{
this.PointTemplate = StyleParser.FindResource<DataTemplate>(this.LayoutRoot, DataPointTemplateResourceKey, true);
}
if (this.LabelTemplate == null)
{
this.LabelTemplate = StyleParser.FindResource<DataTemplate>(this.LayoutRoot, DataPointLabelTemplateResourceKey, false);
}
if (this.LabelTransform == null)
{
this.LabelTransform = StyleParser.FindResource<Transform>(this.LayoutRoot, DataPointLabelTransformResourceKey, false);
}
this.xaxisLabelTemplate = StyleParser.FindResource<DataTemplate>(this.LayoutRoot, XAxisLabelTemplateElementName, true);
#if !SILVERLIGHT
DependencyObject dp = this.PointTemplate.LoadContent();
if (null != dp)
{
GraphPoint gp = dp as GraphPoint;
if (null != gp)
{
this.bindingY1 = gp.GetBindingExpression(GraphPoint.Y1Property);
this.bindingY2 = gp.GetBindingExpression(GraphPoint.Y2Property);
this.bindingX1 = gp.GetBindingExpression(GraphPoint.X1Property);
this.bindingX2 = gp.GetBindingExpression(GraphPoint.X2Property);
this.bindingDataMarkerTemplate = gp.GetBindingExpression(GraphPoint.DataMarkerTemplateProperty);
this.bindingLabel = gp.GetBindingExpression(GraphPoint.LabelProperty);
}
}
#endif
// define the base zindex for the label
FrameworkElement labelElement = null;
if (null != this.LabelTemplate)
{
labelElement = this.LabelTemplate.LoadContent() as FrameworkElement;
this.labelTemplateZindex = Canvas.GetZIndex(labelElement);
}
}
private ErrorNode(BindingExpression errorCountExpression)
: base(Validation.GetHasError((DependencyObject)errorCountExpression.ParentBinding.Source))
{
this.errorCountExpression = errorCountExpression;
this.OnHasErrorsChanged();
}
public BindingValidatorItem(Control control, DependencyProperty dependencyProperty, string ErrorMessage)
{
this.m_Control = control;
this.m_BindingExpression = this.m_Control.GetBindingExpression(dependencyProperty);
this.m_ErrorMessage = ErrorMessage;
}
//------------------------------------------------------
//
// Protected Methods
//
//------------------------------------------------------
/// <summary>
/// Create an appropriate expression for this Binding, to be attached
/// to the given DependencyProperty on the given DependencyObject.
/// </summary>
internal override BindingExpressionBase CreateBindingExpressionOverride(DependencyObject target, DependencyProperty dp, BindingExpressionBase owner)
{
return(BindingExpression.CreateBindingExpression(target, dp, this, owner));
}
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
// Create a new BindingExpression from the given Bind description
internal static BindingExpression CreateBindingExpression(DependencyObject d,
DependencyProperty dp,
Binding binding,
BindingExpressionBase parent)
{
FrameworkPropertyMetadata fwMetaData = dp.GetMetadata(d.DependencyObjectType) as FrameworkPropertyMetadata;
if ((fwMetaData != null && !fwMetaData.IsDataBindingAllowed) || dp.ReadOnly)
throw new ArgumentException(SR.Get(SRID.PropertyNotBindable, dp.Name), "dp");
// create the BindingExpression
BindingExpression bindExpr = new BindingExpression(binding, parent);
bindExpr.ResolvePropertyDefaultSettings(binding.Mode, binding.UpdateSourceTrigger, fwMetaData);
// Two-way Binding with an empty path makes no sense
if (bindExpr.IsReflective && binding.XPath == null &&
(binding.Path == null || String.IsNullOrEmpty(binding.Path.Path)))
throw new InvalidOperationException(SR.Get(SRID.TwoWayBindingNeedsPath));
return bindExpr;
}
private static Type GetBoundType(BindingExpression bindingExpression)
{
var split = bindingExpression.ParentBinding.Path.Path.Split('.').LastOrDefault();
if (split == null)
return null;
var dataItem = bindingExpression.DataItem;
if (dataItem == null)
return null;
var type = dataItem.GetType();
var propertyInfo = type.GetProperty(split);
if (propertyInfo == null)
return null;
return propertyInfo.PropertyType;
}
/// <summary>
/// Sets the binding values for this instance.
/// </summary>
private void SetBindingValues(BindingExpression binding)
{
var bindingPath = string.Empty;
if (binding != null)
{
if (binding.ParentBinding != null && binding.ParentBinding.Path != null)
bindingPath = binding.ParentBinding.Path.Path;
else
bindingPath = string.Empty;
}
BindingPath = bindingPath;
}
