public void NestedCollectionAbsolutePathTest()
{
/*Arrange*/
//create a parent binding.
/*Arrange*/
Binding.BindingDef parent = new Binding.BindingDef(new WebformControl(new TextBox()), "", new Options {
Path = ""
}, controlService);
string rawPath = "ViewModelID";
BindingPath path = new BindingPath(rawPath, parent.SourceExpression, PathMode.Absolute);
var viewModel = new { ViewModelID = "viewmodel1" };
/*Act*/
SourceProperty sourceProperty = path.ResolveAsSource(viewModel);
/*Assert*/
Assert.IsNotNull(sourceProperty);
Assert.IsNotNull(sourceProperty.Descriptor);
Assert.IsNotNull(sourceProperty.OwningInstance);
Assert.IsNotNull(sourceProperty.Value);
Assert.AreEqual("ViewModelID", sourceProperty.Descriptor.Name);
Assert.AreEqual(viewModel, sourceProperty.OwningInstance);
Assert.AreEqual(viewModel.ViewModelID, sourceProperty.Value);
}
public void VerifyTextboxTextProgrammaticBindCreatesCorrectBindingObject()
{
/*Arrange*/
//We expect at least one call
this.viewModel.Expect(vm => vm.EmployeeName).Return("Sam Shiles").Repeat.Once();
TextBox tb = new TextBox();
Options options = new Options {
Path = "EmployeeName"
};
/*Act*/
object resolvedValue = this.binder.ExecuteBind(new WebformControl(tb), options, "Text");
/*Assert*/
//Assert on the binding collection to make sure that the binding has been created successfully
Assert.IsNotNull(collection);
Assert.AreEqual(1, collection.Count);
Binding.BindingDef binding = this.collection[0];
//Assert the options have been stored on the binding correctly
Assert.AreEqual(binding.BindingOptions, options);
Assert.IsTrue(!binding.IsSourceEnumerable);
//Assert that control service has been passed to the binding
Assert.IsNotNull(binding.ControlService);
Assert.AreEqual(this.controlService, binding.ControlService);
//Assert that the binding has created target and source expression objects
Assert.IsNotNull(binding.SourceExpression);
Assert.IsNotNull(binding.TargetExpression);
Assert.IsFalse(binding.HasValueConverter);
}
/// <summary>
/// Bind to a command when the TargetProperty is known
/// </summary>
/// <param name="control"></param>
/// <param name="bindingOptions"></param>
/// <param name="targetPropertyName"></param>
public void ExecuteCommandBind(IBindingTarget control, Options bindingOptions, string targetPropertyName)
{
BindingDef binding = new BindingDef(control, targetPropertyName, bindingOptions, controlService);
CommandStorage.Add(binding);
ExecuteCommandBind(control, binding);
}
private object AttemptConvert(BindingDef binding, object value, IBindingTarget container)
{
if (binding.HasValueConverter)
{
IValueConverter converter = binding.GetValueConverterInstance();
value = converter.Convert(value, binding.ResolveAsTarget(container).Descriptor.PropertyType, binding, CultureInfo.CurrentCulture);
}
return(value);
}
private void ApplyBinding(BindingDef binding, IBindingContainer bindingContainer)
{
TargetProperty property = binding.ResolveAsTarget(this.bindingContainer);
if (property != null)
{
object value = property.Value;
SetProperty(binding, value);
}
}
private bool TrySetParent(BindingDef lastBinding)
{
if (lastBinding != null)
{
//test if the current binding is a child of the previous datacontainer
IBindingTarget child = controlService.FindControlUnique(lastBinding.Container, this.Container.UniqueID);
if (child != null)
{
this.Parent = lastBinding;
}
else if (lastBinding.Parent != null)
{
TrySetParent(lastBinding.Parent);
}
}
return(this.Parent != null);
}
public void VerifyRepeaterProgrammaticBindCreatesCorrectBindingObject()
{
/*Arrange*/
List <Child> children = new List <Child> {
new Child {
Name = "Ben"
}, new Child {
Name = "Sam"
}, new Child {
Name = "Dave"
}, new Child {
Name = "Ali"
}
};
this.viewModel.Expect(vm => vm.ChildrensNames).Return(children).Repeat.Once();
Repeater rpt = new Repeater();
Options options = new Options {
Path = "ChildrensNames"
};
/*Act*/
object resolvedValue = this.binder.ExecuteBind(new WebformControl(rpt), options, "DataSource");
/*Assert*/
Assert.AreEqual(children, resolvedValue);
Binding.BindingDef binding = this.collection[0];
Assert.IsTrue(binding.IsSourceEnumerable);
//collection bindings should always be oneway.
Assert.AreEqual(BindingMode.OneWay, binding.BindingOptions.Mode);
//Assert that control service has been passed to the binding
Assert.IsNotNull(binding.ControlService);
Assert.AreEqual(this.controlService, binding.ControlService);
//Assert that the binding has created target and source expression objects
Assert.IsNotNull(binding.SourceExpression);
Assert.IsNotNull(binding.TargetExpression);
Assert.IsFalse(binding.HasValueConverter);
}
//TODO: Should probably be a member of binding.
private void SetProperty(BindingDef binding, object value)
{
SourceProperty property = binding.SourceExpression.ResolveAsSource(this.DataContext);
if (property != null && property.Descriptor != null && !property.Descriptor.IsReadOnly)
{
object convertedValue = null;
Type destinationType = property.Descriptor.PropertyType;
if (binding.HasValueConverter)
{
IValueConverter valueConverter = binding.GetValueConverterInstance();
convertedValue = valueConverter.ConvertBack(value, property.Descriptor.PropertyType, null, null);
}
else
{
if (TypeHelper.IsSimpleType(value.GetType()) && TypeHelper.IsSimpleType(destinationType))
{
convertedValue = Convert.ChangeType(value, destinationType);
}
else
{
TypeConverter converter = TypeDescriptor.GetConverter(destinationType);
if (converter != null)
{
convertedValue = converter.ConvertFrom(value);
}
else
{
converter = TypeDescriptor.GetConverter(value.GetType());
if (converter != null)
{
convertedValue = converter.ConvertTo(value, destinationType);
}
}
}
}
property.Descriptor.SetValue(property.OwningInstance, convertedValue);
}
}
public void NestedAbsolutePathTest()
{
/*Arrange*/
//create a parent binding.
Binding.BindingDef parent = new Binding.BindingDef(
new WebformControl(new TextBox())
, "Text", 0
, new BindingCollection()
, new Options {
Path = "Companies"
}
, true, controlService);
string rawPath = "CompanyName";
BindingPath path = new BindingPath(rawPath, parent.SourceExpression, PathMode.Absolute);
var employee1 = new { Name = "Sam" };
var employee2 = new { Name = "Ben" };
var employee3 = new { Name = "Ali" };
var list = new[] { employee1, employee2, employee3 };
var company = new { AvailableEmployees = list };
var companyList = new[] { company };
var viewModel = new { CompanyName = "Tesco Ltd.", Companies = companyList };
/*Act*/
SourceProperty sourceProperty = path.ResolveAsSource(viewModel);
/*Assert*/
Assert.IsNotNull(sourceProperty);
Assert.IsNotNull(sourceProperty.Descriptor);
Assert.IsNotNull(sourceProperty.OwningInstance);
Assert.IsNotNull(sourceProperty.Value);
Assert.AreEqual("CompanyName", sourceProperty.Descriptor.Name);
Assert.AreEqual(viewModel, sourceProperty.OwningInstance);
Assert.AreEqual(viewModel.CompanyName, sourceProperty.Value);
}
public void NestedRelativePathTest()
{
/*Arrange*/
Binding.BindingDef parent = new Binding.BindingDef(
new WebformControl(new TextBox()),
"Text",
new Options()
{
Path = "Company"
},
controlService);
string rawPath = "AvailableEmployees.Name";
BindingPath path = new BindingPath(rawPath, 2, parent.SourceExpression, PathMode.Relative);
var employee1 = new { Name = "Sam" };
var employee2 = new { Name = "Ben" };
var employee3 = new { Name = "Ali" };
var list = new[] { employee1, employee2, employee3 };
var company = new { AvailableEmployees = list };
var viewModel = new { Company = company };
/*Act*/
SourceProperty sourceProperty = path.ResolveAsSource(viewModel);
/*Assert*/
Assert.IsNotNull(sourceProperty);
Assert.IsNotNull(sourceProperty.Descriptor);
Assert.IsNotNull(sourceProperty.OwningInstance);
Assert.IsNotNull(sourceProperty.Value);
Assert.AreEqual("Ali", sourceProperty.Value);
Assert.AreEqual("Name", sourceProperty.Descriptor.Name);
//empoyee at the index of 1
Assert.AreEqual(employee3, sourceProperty.OwningInstance);
Assert.AreEqual(employee3.Name, sourceProperty.Value);
Assert.AreEqual("Name", sourceProperty.Descriptor.Name);
}
private void ExecuteCommandBind(IBindingTarget control, BindingDef binding)
{
//Get the ICommandObject from the source
SourceProperty commandInstance = binding.SourceExpression.ResolveAsSource(this.DataContext);
object commandObject = commandInstance.Value;
ICommand iCommand = commandObject as ICommand;
//Get the property setter for the event to which we will bind
TargetEvent evt = binding.ResolveAsTargetEvent(this.bindingContainer);
//bind
Type eventDelegateType = evt.Descriptor.EventHandlerType;
Delegate handler = new EventHandler((s, e) => iCommand.Execute(this));
evt.Descriptor.GetAddMethod().Invoke(evt.OwningControl, new object[] { handler });
control.Visible = iCommand.CanExecute(this);
//listen to canExecuteChanged
iCommand.CanExecuteChanged += new EventHandler((s, e) => control.Visible = iCommand.CanExecute(this));
}
/// <summary>
/// Execute a bind in the context of a collection container.
/// </summary>
/// <remarks>
/// Specficy the target control directly.
/// </remarks>
/// <param name="control">The target control</param>
/// <param name="collectionItemContainer">
/// The collection item container. E.g. In the case of a repeater a RepeaterItem.
/// This is available from the ItemTemplate control via (IDataItemContainer)container.NamingContainer.
/// </param>
///<param name="targetPropertyName">The property on the targetcontrol.</param>
/// <param name="bindingOptions"></param>
/// <returns>The result (value) of the bind</returns>
public object ExecuteBind(IBindingTarget control, IBindingTarget <IDataItemContainer> collectionItemContainer, Options bindingOptions, string targetPropertyName)
{
if (control == null || bindingContainer == null || bindingOptions == null || string.IsNullOrEmpty(bindingOptions.Path))
{
return(null);
}
object dataValue = null;
BindingDef binding = null;
IBindingTarget genericContainer = null;
object baseContext = this.DataContext;
if (bindingOptions.PathMode == PathMode.Relative && collectionItemContainer != null)
{
IDataItemContainer containerControl = collectionItemContainer.TargetInstance;
dataValue = DataBinder.Eval(containerControl.DataItem, bindingOptions.Path);
bool isCollectionBinding = DetermineIfCollection(control, dataValue);
binding = new BindingDef(control, targetPropertyName, containerControl.DataItemIndex, DataStorage, bindingOptions, isCollectionBinding, controlService);
genericContainer = collectionItemContainer;
}
else
{
dataValue = DataBinder.Eval(baseContext, bindingOptions.Path);
bool isCollectionBinding = DetermineIfCollection(control, dataValue);
binding = new BindingDef(control, targetPropertyName, bindingOptions, isCollectionBinding, controlService);
genericContainer = controlService.GetParent(control);
}
//determine binding direction is not explicitly set based on the value and contorl
if (bindingOptions.Mode == BindingMode.Unset)
{
bindingOptions.Mode = DetermineBindingDirection(control, dataValue);
}
//store the binding
DataStorage.Add(binding);
return(AttemptConvert(binding, dataValue, genericContainer));
}
private List <Control> SetupCollectionUnbindTest(Options options)
{
List <Control> createdControls = new List <Control>();
//Create a repeater from which we will read data
Repeater rpt = new Repeater();
rpt.ItemTemplate = new DynamicItemTemplate(new List <Func <Control> > {
() => new TextBox()
{
ID = "tb"
}
});
var item1 = new Child {
Name = "Sam"
};
var item2 = new Child {
Name = "Ben"
};
var item3 = new Child {
Name = "Ali"
};
var list = new List <Child> {
item1, item2, item3
};
viewModel.ChildrensNames = list;
//Create a binding collection
collection = new Binding.BindingCollection();
//add in the parent binding, this will not be used in the bind but is required for unbind to work within a collection
collection.Add(new Binding.BindingDef(new WebformControl(rpt), "DataSource", new Options {
Path = "ChildrensNames"
}, true, controlService));
//When the item is created, create a binding for it and add to the binding collection.
//We will also had the itemtemplate create control to a collection so that we can stick some values
//in to simulate user input before unbinding to the model.
int index = 0;
rpt.ItemDataBound += (s, e) =>
{
TextBox tb = e.Item.FindControl("tb") as TextBox;
WebformControl wrappedTb = new WebformControl(tb);
options.Path = "Name";
Binding.BindingDef binding = new Binding.BindingDef(wrappedTb, "Text", index, collection, options, false, controlService);
index++;
collection.Add(binding);
createdControls.Add(tb);
};
rpt.DataSource = list;
WebformControl dummyControl = new WebformControl(new TextBox());
//tell the mock conntrol service to return the collection result when required.
this.controlService.Expect(cs => cs.FindControlUnique(null, null)).IgnoreArguments()
.Do(
new Func <IBindingTarget, string, IBindingTarget>((b, s) =>
{
//we only need it return a non-null
return(dummyControl);
}));
int counter = 0;
//and setup service to return it
controlService.Expect(cs => cs.Unwrap(null)).IgnoreArguments().Do(new Func <IBindingTarget, object>((t) =>
{
Control ctrl = createdControls[counter];
counter++;
return(ctrl);
}));
//setup viewmodel with default values
viewModel.ChildrensNames = new List <Child> {
new Child(), new Child(), new Child()
};
//setup the data storage service to return the collection
dataStorageService.Expect(ds => ds.RetrieveOrCreate <Binding.BindingCollection>(DATA_BINDING_KEY)).Return(collection);
dataStorageService.Expect(ds => ds.RetrieveOrCreate <Binding.BindingCollection>(COMMAND_BINDING_KEY)).Return(new Binding.BindingCollection());
//and the viewmodel (we are using the view state binder which will try to resolve the service from storage
dataStorageService.Expect(ds => ds.Retrieve <object>(null)).IgnoreArguments().Return(viewModel);
rpt.DataBind();
return(createdControls);
}
public void VerifyTextboxInRepeaterProgrammaticBindReturnsCorrectValue()
{
/*Arrange*/
List <Child> children = new List <Child> {
new Child {
Name = "Ben"
}, new Child {
Name = "Sam"
}, new Child {
Name = "Dave"
}, new Child {
Name = "Ali"
}
};
this.viewModel.Expect(vm => vm.ChildrensNames).Return(children).Repeat.Once();
//tell the mock conntrol service to return the collection result when required.
this.controlService.Expect(cs => cs.FindControlUnique(null, null)).IgnoreArguments()
.Do(
new Func <IBindingTarget, string, IBindingTarget>((b, s) =>
{
if (s.EndsWith("tb1"))
{
//we only need it return a non-null
return(new WebformControl(new TextBox()));
}
return(null);
}));
//create a repeater and set its item template
Repeater rpt = new Repeater();
rpt.ItemTemplate = new DynamicItemTemplate(new List <Func <Control> >
{
() => new TextBox()
{
ID = "tb1"
}
});
/*Act*/
Options options = new Options {
Path = "ChildrensNames"
};
object resolvedValue = this.binder.ExecuteBind(new WebformControl(rpt), options, "DataSource");
rpt.DataSource = resolvedValue;
//When the repeater item is created bind up child controls and test the values returned from the binder
rpt.ItemDataBound += (s, e) =>
{
RepeaterItem rptItem = e.Item;
TextBox rptItemControl = rptItem.FindControl("tb1") as TextBox;
Options textBoxBindOptions = new Options {
Path = "Name"
};
object tbResolvedValue = this.binder.ExecuteBind(new WebformControl(rptItemControl), new WebformControl <IDataItemContainer>(rptItem), textBoxBindOptions, "Text");
Assert.AreEqual(children[rptItem.ItemIndex].Name, tbResolvedValue);
};
rpt.DataBind();
/*Assert*/
//verify we have an repeater item for each item passed in on the datasource
Assert.AreEqual(children.Count, rpt.Items.Count);
//we should have one binding for each child control (4) plus the binding the on the parent(rpt)
Assert.AreEqual((children.Count + 1), this.collection.Count);
Binding.BindingDef parentBinding = collection[0];
Assert.IsTrue(parentBinding.IsSourceEnumerable);
Assert.IsNotNull(parentBinding.Container);
Assert.AreEqual(rpt, ((WebformControl)parentBinding.Container).Control);
//test the child bindings
for (int i = 1; i < collection.Count; i++)
{
Binding.BindingDef childBinding = collection[i];
Assert.IsTrue(childBinding.Parent == parentBinding);
Assert.AreEqual(i - 1, childBinding.DataItemIndex);
Assert.IsFalse(childBinding.IsSourceEnumerable);
}
}
private void ExecuteCommandBind(BindingDef binding)
{
TargetProperty target = binding.ResolveAsTarget(this.BindingContainer);
ExecuteCommandBind(target.OwningControl, binding);
}
