Fixed issue with binding context in a list view scenario.

CrossPlatformModules.csproj

@@ -198,6 +198,7 @@
     <TypeScriptCompile Include="apps\ui-tests-app\pages\i61.ts" />
     <TypeScriptCompile Include="apps\ui-tests-app\pages\i73.ts" />
     <TypeScriptCompile Include="apps\ui-tests-app\pages\gestures.ts" />
+    <TypeScriptCompile Include="apps\ui-tests-app\pages\listview_binding.ts" />
     <TypeScriptCompile Include="file-system\file-name-resolver.d.ts" />
     <TypeScriptCompile Include="file-system\file-name-resolver.ts">
       <DependentUpon>file-name-resolver.d.ts</DependentUpon>

apps/ui-tests-app/pages/listview_binding.ts

@@ -0,0 +1,23 @@
+import pageModule = require("ui/page");
+import gridLayoutModule = require("ui/layouts/grid-layout");
+import listViewModule = require("ui/list-view");
+import observable = require("data/observable");
+import observableArr = require("data/observable-array");
+
+var arr = new observableArr.ObservableArray();
+for (var i = 0; i < 100; i++) {
+    arr.push("item " + i);
+}
+
+export function createPage() {
+    var page: pageModule.Page = new pageModule.Page();
+    var grid: gridLayoutModule.GridLayout = new gridLayoutModule.GridLayout();
+    var listView: listViewModule.ListView = new listViewModule.ListView();
+    listView.on(listViewModule.ListView.loadedEvent, function (args: observable.EventData) {
+        (<any>args.object).items = arr;
+    });
+    grid.addChild(listView);
+    page.content = grid;
+
+    return page;
+}

ui/core/bindable.ts

@@ -49,6 +49,7 @@ export class Bindable extends dependencyObservable.DependencyObservable implemen
         var bindingSource = source;
         if (!bindingSource) {
             bindingSource = this.bindingContext;
+            binding.sourceIsBindingContext = true;
         }
         if (!types.isNullOrUndefined(bindingSource)) {
             binding.bind(bindingSource);
@@ -102,8 +103,7 @@ export class Bindable extends dependencyObservable.DependencyObservable implemen
         for (var p in this._bindings) {
             binding = this._bindings[p];
 
-            var sourceIsNotBindingContext = (binding.source && (binding.source.get() !== oldValue));
+            if (binding.updating || !binding.sourceIsBindingContext) {
-            if (binding.updating || sourceIsNotBindingContext) {
                 continue;
             }
 
@@ -122,6 +122,7 @@ export class Bindable extends dependencyObservable.DependencyObservable implemen
 export class Binding {
     options: definition.BindingOptions;
     updating = false;
+    sourceIsBindingContext: boolean;
     source: WeakRef<Object>;
     target: WeakRef<Bindable>;
 

ui/list-view/list-view-common.ts

@@ -123,7 +123,10 @@ export class ListView extends view.View implements definition.ListView {
 
     public _getDefaultItemContent(index: number): view.View {
         var lbl = new label.Label();
-        lbl.text = this._getDataItem(index) + "";
+        lbl.bind({
+            targetProperty: "text",
+            sourceProperty: "$value"
+        });
         return lbl;
     }