{"id":253679,"date":"2015-03-24T15:56:10","date_gmt":"2015-03-24T11:56:10","guid":{"rendered":"http:\/\/savepearlharbor.com\/?p=253679"},"modified":"-0001-11-30T00:00:00","modified_gmt":"-0001-11-29T21:00:00","slug":"","status":"publish","type":"post","link":"https:\/\/savepearlharbor.com\/?p=253679","title":{"rendered":"\u0424\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u0441 Range \u0432 ObservableCollection"},"content":{"rendered":"<p>     \t\u041a\u043b\u0430\u0441\u0441 <a href=\"https:\/\/msdn.microsoft.com\/ru-ru\/library\/ms668604(v=vs.110).aspx\">ObservableCollection<\/a> \u043d\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0442\u044c, \u0443\u0434\u0430\u043b\u044f\u0442\u044c \u0438 \u0442.\u0434. \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u0438 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u043e\u0432.<br \/>  \u0427\u0442\u043e\u0431\u044b \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c \u0442\u0430\u043a\u0443\u044e \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u043d\u043e \u0441\u043e\u0437\u0434\u0430\u0442\u044c \u043f\u043e\u0442\u043e\u043c\u043e\u043a \u044d\u0442\u043e\u0433\u043e \u043a\u043b\u0430\u0441\u0441\u0430, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b.<br \/>  <a name=\"habracut\"><\/a><\/p>\n<p>  \u0412 ObservableCollection \u0435\u0441\u0442\u044c \u0443\u043d\u0430\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u043d\u043e\u0435 \u043e\u0442 Collection \u0441\u0432\u043e\u0439\u0441\u0442\u0432\u043e:  <\/p>\n<pre><code>protected IList&lt;T&gt; Items { get; }<\/code><\/pre>\n<p>  \u0441 \u043a\u043e\u0442\u043e\u0440\u044b\u043c \u0438 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c.<\/p>\n<p>  <b>\u0428\u0430\u0431\u043b\u043e\u043d \u0434\u043e\u0440\u0430\u0431\u043e\u0442\u043a\u0438 \u0442\u0430\u043a\u043e\u0439:<\/b><br \/>  1) \u041f\u0440\u043e\u0432\u0435\u0440\u0438\u0442\u044c \u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f: <\/p>\n<pre><code>protected void CheckReentrancy();<\/code><\/pre>\n<p>  2) \u041e\u0431\u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u044b \u0441\u043e\u0433\u043b\u0430\u0441\u043d\u043e \u0432\u0430\u0448\u0435\u0439 \u043b\u043e\u0433\u0438\u043a\u0435: <\/p>\n<pre><code>protected IList&lt;T&gt; Items { get; }<\/code><\/pre>\n<p>  3) \u0412\u044b\u0437\u0432\u0430\u0442\u044c \u0441\u043e\u0431\u044b\u0442\u0438\u0435 PropertyChanged \u0434\u043b\u044f \u0441\u0432\u043e\u0439\u0441\u0442\u0432 \u00abCount\u00bb \u0438 \u00abItem[]\u00bb:  <\/p>\n<pre><code>             OnPropertyChanged(new PropertyChangedEventArgs(&quot;Count&quot;));             OnPropertyChanged(new PropertyChangedEventArgs(&quot;Item[]&quot;)); <\/code><\/pre>\n<p>  4) \u0412\u044b\u0437\u0432\u0430\u0442\u044c \u0441\u043e\u0431\u044b\u0442\u0438\u0435 CollectionChanged \u0441 \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u0430\u043c\u0438 \u0441\u043e\u0431\u044b\u0442\u0438\u044f: \u0442\u0438\u043f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f Reset, \u043f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b OldItems \u0438 NewItems \u043d\u0435 \u043f\u0435\u0440\u0435\u0434\u0430\u0432\u0430\u0442\u044c:  <\/p>\n<pre><code>             OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset)); <\/code><\/pre>\n<p>  <b>\u041d\u0435\u0434\u043e\u0441\u0442\u0430\u0442\u043a\u0438:<\/b><br \/>  \u0418\u0437-\u0437\u0430 \u043f.4 \u0432 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0435 \u0441\u043e\u0431\u044b\u0442\u0438\u044f CollectionChanged \u043d\u0435\u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e \u0431\u0443\u0434\u0435\u0442 \u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u0441 OldItems \u0438 NewItems \u0442\u0430\u043a \u043a\u0430\u043a \u043e\u043d\u0438 \u043f\u0443\u0441\u0442\u044b\u0435. \u042d\u0442\u043e \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e \u0438\u0437-\u0437\u0430 \u0442\u043e\u0433\u043e, \u0447\u0442\u043e \u043d\u0435\u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u044b WPF \u043d\u0435 \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0442 \u0441 \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f\u043c\u0438 \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u0438 \u043d\u0435 \u043f\u043e \u043e\u0434\u043d\u043e\u043c\u0443 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u0443, \u0430 \u043f\u043e \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e. \u041f\u0440\u0438 \u044d\u0442\u043e\u043c, \u0435\u0441\u043b\u0438 \u0442\u0438\u043f \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u044f Reset, \u0442\u043e \u044d\u0442\u043e \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442 \u0447\u0442\u043e \u043f\u0440\u043e\u0438\u0437\u043e\u0448\u043b\u043e \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0435 \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u0438, \u0438 \u0434\u043b\u044f \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u043e\u0432 WPF \u044d\u0442\u043e \u043d\u043e\u0440\u043c\u0430\u043b\u044c\u043d\u043e. \u0415\u0441\u043b\u0438 \u0436\u0435 \u0432\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u0442\u0435 \u043d\u043e\u0432\u044b\u0439 \u043a\u043b\u0430\u0441\u0441 \u043d\u0435 \u0432 \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u0430 \u0434\u0430\u043d\u043d\u044b\u0445 \u0434\u043b\u044f \u043a\u043e\u043d\u0442\u0440\u043e\u043b\u0430 WPF, \u0442\u043e \u043c\u043e\u0436\u043d\u043e \u0432 \u043f.4 \u043f\u0435\u0440\u0435\u0434\u0430\u0432\u0430\u0442\u044c \u0438 \u0434\u0440\u0443\u0433\u0438\u0435 <a href=\"https:\/\/msdn.microsoft.com\/ru-ru\/library\/system.collections.specialized.notifycollectionchangedaction(v=vs.110).aspx\">\u0442\u0438\u043f\u044b \u0438\u0437\u043c\u0435\u043d\u0435\u043d\u0438\u0439<\/a>, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0437\u0430\u043f\u043e\u043b\u043d\u0435\u043d\u043d\u044b\u0435 \u0437\u043d\u0430\u0447\u0435\u043d\u0438\u044f OldItems \u0438 NewItems \u0438 \u0437\u0430\u0442\u0435\u043c \u0441\u043f\u043e\u043a\u043e\u0439\u043d\u043e \u0438\u0445 \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0442\u044c.<\/p>\n<p>  <b>\u041f\u0440\u0438\u043c\u0435\u0440:<\/b>  <\/p>\n<pre><code> using System; using System.Collections.Generic; using System.Collections.ObjectModel; using System.Collections.Specialized; using System.ComponentModel; using System.Linq;  namespace Common.Utils {     public class ObservableRangeCollection&lt;T&gt; : ObservableCollection&lt;T&gt;     {         private const string CountString = &quot;Count&quot;;         private const string IndexerName = &quot;Item[]&quot;;          protected enum ProcessRangeAction         {             Add,             Replace,             Remove         };          public ObservableRangeCollection() : base()         {         }          public ObservableRangeCollection(IEnumerable&lt;T&gt; collection) : base(collection)         {         }          public ObservableRangeCollection(List&lt;T&gt; list) : base(list)         {         }          protected virtual void ProcessRange(IEnumerable&lt;T&gt; collection, ProcessRangeAction action)         {             if (collection == null) throw new ArgumentNullException(&quot;collection&quot;);              var items = collection as IList&lt;T&gt; ?? collection.ToList();             if (!items.Any()) return;              this.CheckReentrancy();              if (action == ProcessRangeAction.Replace) this.Items.Clear();             foreach (var item in items)             {                 if (action == ProcessRangeAction.Remove) this.Items.Remove(item);                 else this.Items.Add(item);             }              this.OnPropertyChanged(new PropertyChangedEventArgs(CountString));             this.OnPropertyChanged(new PropertyChangedEventArgs(IndexerName));             this.OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));         }          public void AddRange(IEnumerable&lt;T&gt; collection)         {             this.ProcessRange(collection, ProcessRangeAction.Add);         }          public void ReplaceRange(IEnumerable&lt;T&gt; collection)         {             this.ProcessRange(collection, ProcessRangeAction.Replace);         }          public void RemoveRange(IEnumerable&lt;T&gt; collection)         {             this.ProcessRange(collection, ProcessRangeAction.Remove);         }     } } <\/code><\/pre>\n<p>  <b>\u0422\u0435\u0441\u0442\u044b:<\/b><\/p>\n<pre><code> using System; using System.Collections.Generic; using System.Collections.Specialized; using System.ComponentModel; using Common.Utils; using Microsoft.VisualStudio.TestTools.UnitTesting;  namespace Tests.Common {     [TestClass]     public class ObservableRangeCollectionTests     {         [TestMethod]         public void AddRangeTest()         {             var eventCollectionChangedCount = 0;             var eventPropertyChangedCount = 0;              var orc = new ObservableRangeCollection&lt;int&gt;(new List&lt;int&gt; {0, 1, 2, 3});             orc.CollectionChanged += (sender, e) =&gt;             {                 Assert.AreEqual(NotifyCollectionChangedAction.Reset, e.Action);                 eventCollectionChangedCount++;             };             ((INotifyPropertyChanged) orc).PropertyChanged += (sender, e) =&gt;             {                 CollectionAssert.Contains(new[] { &quot;Count&quot;, &quot;Item[]&quot; }, e.PropertyName);                 eventPropertyChangedCount++;             };                          orc.AddRange(new List&lt;int&gt; { 4, 5, 6, 7 });              Assert.AreEqual(8, orc.Count);             CollectionAssert.AreEqual(new List&lt;int&gt; { 0, 1, 2, 3, 4, 5, 6, 7 }, orc);             Assert.AreEqual(1, eventCollectionChangedCount);             Assert.AreEqual(2, eventPropertyChangedCount);         }          [TestMethod]         public void ReplaceRangeTest()         {             var eventCollectionChangedCount = 0;             var eventPropertyChangedCount = 0;              var orc = new ObservableRangeCollection&lt;int&gt;(new List&lt;int&gt; { 0, 1, 2, 3 });             orc.CollectionChanged += (sender, e) =&gt;             {                 Assert.AreEqual(NotifyCollectionChangedAction.Reset, e.Action);                 eventCollectionChangedCount++;             };             ((INotifyPropertyChanged)orc).PropertyChanged += (sender, e) =&gt;             {                 CollectionAssert.Contains(new[] { &quot;Count&quot;, &quot;Item[]&quot; }, e.PropertyName);                 eventPropertyChangedCount++;             };              orc.ReplaceRange(new List&lt;int&gt; { 4, 5, 6 });              Assert.AreEqual(3, orc.Count);             CollectionAssert.AreEqual(new List&lt;int&gt; { 4, 5, 6 }, orc);             Assert.AreEqual(1, eventCollectionChangedCount);             Assert.AreEqual(2, eventPropertyChangedCount);         }          [TestMethod]         public void RemoveRangeTest()         {             var eventCollectionChangedCount = 0;             var eventPropertyChangedCount = 0;              var orc = new ObservableRangeCollection&lt;int&gt;(new List&lt;int&gt; { 0, 1, 2, 3 });             orc.CollectionChanged += (sender, e) =&gt;             {                 Assert.AreEqual(NotifyCollectionChangedAction.Reset, e.Action);                 eventCollectionChangedCount++;             };             ((INotifyPropertyChanged)orc).PropertyChanged += (sender, e) =&gt;             {                 CollectionAssert.Contains(new[] { &quot;Count&quot;, &quot;Item[]&quot; }, e.PropertyName);                 eventPropertyChangedCount++;             };              orc.RemoveRange(new List&lt;int&gt; { 1, 3, 6 });              Assert.AreEqual(2, orc.Count);             CollectionAssert.AreEqual(new List&lt;int&gt; { 0, 2 }, orc);             Assert.AreEqual(1, eventCollectionChangedCount);             Assert.AreEqual(2, eventPropertyChangedCount);         }          private enum RangeAction         {             Add,             Replace,             Remove         }          private void EmptyRangeTest(RangeAction action)         {             var eventCollectionChangedCount = 0;             var eventPropertyChangedCount = 0;              var orc = new ObservableRangeCollection&lt;int&gt;(new List&lt;int&gt; { 0, 1, 2, 3 });             orc.CollectionChanged += (sender, e) =&gt;             {                 eventCollectionChangedCount++;             };             ((INotifyPropertyChanged)orc).PropertyChanged += (sender, e) =&gt;             {                 eventPropertyChangedCount++;             };              switch (action)             {                 case RangeAction.Replace: orc.ReplaceRange(new List&lt;int&gt;());                     break;                 case RangeAction.Remove: orc.RemoveRange(new List&lt;int&gt;());                     break;                 default: orc.AddRange(new List&lt;int&gt;());                     break;             }              Assert.AreEqual(4, orc.Count);             CollectionAssert.AreEqual(new List&lt;int&gt; { 0, 1, 2, 3 }, orc);             Assert.AreEqual(0, eventCollectionChangedCount);             Assert.AreEqual(0, eventPropertyChangedCount);         }          [TestMethod]         public void AddEmptyRangeTest()         {             this.EmptyRangeTest(RangeAction.Add);         }          [TestMethod]         public void ReplaceEmptyRangeTest()         {             this.EmptyRangeTest(RangeAction.Replace);         }          [TestMethod]         public void RemoveEmptyRangeTest()         {             this.EmptyRangeTest(RangeAction.Remove);         }          [TestMethod]         [ExpectedException(typeof(ArgumentNullException))]         public void AddNullRangeTest()         {             new ObservableRangeCollection&lt;int&gt;().AddRange(null);         }          [TestMethod]         [ExpectedException(typeof(ArgumentNullException))]         public void ReplaceNullRangeTest()         {             new ObservableRangeCollection&lt;int&gt;().ReplaceRange(null);         }          [TestMethod]         [ExpectedException(typeof(ArgumentNullException))]         public void RemoveNullRangeTest()         {             new ObservableRangeCollection&lt;int&gt;().RemoveRange(null);         }     } } <\/code><\/pre>\n<div class=\"clear\"><\/div>\n<p> \u0441\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u043e\u0440\u0438\u0433\u0438\u043d\u0430\u043b \u0441\u0442\u0430\u0442\u044c\u0438 <a href=\"http:\/\/habrahabr.ru\/post\/253857\/\"> http:\/\/habrahabr.ru\/post\/253857\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>     \t\u041a\u043b\u0430\u0441\u0441 <a href=\"https:\/\/msdn.microsoft.com\/ru-ru\/library\/ms668604(v=vs.110).aspx\">ObservableCollection<\/a> \u043d\u0435 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0434\u043e\u0431\u0430\u0432\u043b\u044f\u0442\u044c, \u0443\u0434\u0430\u043b\u044f\u0442\u044c \u0438 \u0442.\u0434. \u043a\u043e\u043b\u043b\u0435\u043a\u0446\u0438\u0438 \u044d\u043b\u0435\u043c\u0435\u043d\u0442\u043e\u0432.<br \/>  \u0427\u0442\u043e\u0431\u044b \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c \u0442\u0430\u043a\u0443\u044e \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u044c \u043c\u043e\u0436\u043d\u043e \u0441\u043e\u0437\u0434\u0430\u0442\u044c \u043f\u043e\u0442\u043e\u043c\u043e\u043a \u044d\u0442\u043e\u0433\u043e \u043a\u043b\u0430\u0441\u0441\u0430, \u0432 \u043a\u043e\u0442\u043e\u0440\u043e\u043c \u0440\u0435\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b.  <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-253679","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/253679","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=253679"}],"version-history":[{"count":0,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=\/wp\/v2\/posts\/253679\/revisions"}],"wp:attachment":[{"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=253679"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=253679"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/savepearlharbor.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=253679"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}