119 lines
3.9 KiB
C#
119 lines
3.9 KiB
C#
//-----------------------------------------------------------------------
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// <copyright file="RSSChannelModel.cs" company="BTU/IIT">
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// The MIT License (MIT). Copyright (c) 2013 BTU/IIT.
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// </copyright>
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// <author>fiedlchr</author>
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// <date>15.10.2013</date>
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// <summary>Implements the RSS channel model class</summary>
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//-----------------------------------------------------------------------
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namespace CampusAppWPortalLib8.Model.RSS
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{
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using System.Collections.ObjectModel;
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using System.Collections.Specialized;
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using System.Linq;
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using System.Xml.Serialization;
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/// <summary> Channel Model, which contains the RSS feed item list. </summary>
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/// <remarks> fiedlchr, 15.10.2013. </remarks>
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public class RSSChannelModel
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{
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/// <summary> RSS feed information item list. </summary>
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private ObservableCollection<RSSModel> item;
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#region Constructor
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/// <summary> Initializes a new instance of the <see cref="RSSChannelModel" /> class. </summary>
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/// <remarks> fiedlchr, 15.10.2013. </remarks>
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public RSSChannelModel()
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{
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this.item = new ObservableCollection<RSSModel>();
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this.item.CollectionChanged += new NotifyCollectionChangedEventHandler(this.OnListChanged);
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}
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#endregion
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#region Property
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/// <summary> Gets or sets the RSS feed item list. </summary>
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/// <value> The item. </value>
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[XmlElement("item")]
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public ObservableCollection<RSSModel> Item
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{
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get
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{
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return this.item;
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}
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set
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{
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if (value != this.item)
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{
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this.item = value;
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}
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}
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}
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#endregion
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#region Method
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/// <summary> Order by date. </summary>
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/// <remarks> fiedlchr, 15.10.2013. </remarks>
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/// <param name="asc"> (Optional) the ascending. </param>
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public void OrderByDate(bool asc = false)
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{
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this.item.CollectionChanged -= this.OnListChanged;
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if (asc == false)
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{
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var sortedOC = from elem in this.item
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orderby elem.DTTimestamp descending
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select elem;
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this.item = new ObservableCollection<RSSModel>(sortedOC);
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this.FixIndex();
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this.item.CollectionChanged += new NotifyCollectionChangedEventHandler(this.OnListChanged);
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}
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else
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{
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var sortedOC = from elem in this.item
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orderby elem.DTTimestamp ascending
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select elem;
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this.item = new ObservableCollection<RSSModel>(sortedOC);
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this.FixIndex();
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this.item.CollectionChanged += new NotifyCollectionChangedEventHandler(this.OnListChanged);
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}
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}
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/// <summary>
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/// Is called when the item list has changed. Here used for the add event. Set the index of
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/// the last list element.
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/// </summary>
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/// <remarks> fiedlchr, 15.10.2013. </remarks>
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/// <param name="sender"> item list. </param>
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/// <param name="e"> event args. </param>
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private void OnListChanged(object sender, NotifyCollectionChangedEventArgs e)
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{
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if (e.Action == NotifyCollectionChangedAction.Add)
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{
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ObservableCollection<RSSModel> list = sender as ObservableCollection<RSSModel>;
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list[list.Count - 1].Index = list.Count - 1;
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}
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}
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/// <summary>Fixes the index property of the items.</summary>
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/// <remarks>Fiedler, 15.10.2013.</remarks>
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private void FixIndex()
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{
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for (int i = 0; i < this.item.Count(); i++)
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{
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this.item[i].Index = i;
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}
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}
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#endregion
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}
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}
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