此代码主要用来演示ListView.SelectedItems属性。
即获取ListView列表中所有选定项集合。
代码实现的功能：计算用户选定的早餐所需花费的价值。

class</a>="c-sharp">using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace Demo08 { public partial <a class="tags" href="/tags/CLASS.html" title=class>class</a> MainForm : Form { public MainForm() { InitializeComponent(); } /// <summary> /// 初始化列表中的数据。 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void MainForm_Load(<a <a class="tags" href="/tags/CLASS.html" title=class>class</a>="tags" href="/tags/OBJECT.html" title=object>object</a> sender, EventArgs e) { <a <a class="tags" href="/tags/CLASS.html" title=class>class</a>="tags" href="/tags/STRING.html" title=string>string</a>[] FoodList = new <a <a class="tags" href="/tags/CLASS.html" title=class>class</a>="tags" href="/tags/STRING.html" title=string>string</a>[]{"Juice", "Coffee", "Cereal & Milk", "Fruit Plate", "Toast & Jelly", "Bagel & Cream Cheese"}; <a <a class="tags" href="/tags/CLASS.html" title=class>class</a>="tags" href="/tags/STRING.html" title=string>string</a>[] FoodPrice = new <a <a class="tags" href="/tags/CLASS.html" title=class>class</a>="tags" href="/tags/STRING.html" title=string>string</a>[]{"1.09", "1.09", "2.19", "2.49", "1.49", "1.49"}; this.BreakfastListView.BeginUpdate(); for (int Index = 0; Index < FoodList.Length; Index++) { ListViewItem Item = new ListViewItem(); Item.Text = FoodList[Index]; Item.SubItems.Add(FoodPrice[Index]); this.BreakfastListView.Items.Add(Item); } this.BreakfastListView.AutoResizeColumns(ColumnHeaderAutoResizeStyle.HeaderSize); this.BreakfastListView.EndUpdate(); } /// <summary> /// 计算用户选中的早餐所需的花费。 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void CalculateButton_Click(<a <a class="tags" href="/tags/CLASS.html" title=class>class</a>="tags" href="/tags/OBJECT.html" title=object>object</a> sender, EventArgs e) { double Price = 0; ListView.SelectedListViewItemCollection SelectedItems = this.BreakfastListView.SelectedItems; foreach (ListViewItem Item in SelectedItems) { double ItemPrice = double.Parse(Item.SubItems[1].Text); Price = Price + ItemPrice; } MessageBox.Show(<a <a class="tags" href="/tags/CLASS.html" title=class>class</a>="tags" href="/tags/STRING.html" title=string>string</a>.Format("所选中的早餐需要花费{0}人民币！", Price)); } } }