ListView控件演示07：获取列表中所有选定项的索引集合

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

选择多个项列表

计算早餐花费

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 Demo07 { public partial class 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(object sender, EventArgs e) { string[] FoodList = new string[]{"Juice", "Coffee", "Cereal & Milk", "Fruit Plate", "Toast & Jelly", "Bagel & Cream Cheese"}; string[] FoodPrice = new string[]{"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(object sender, EventArgs e) { double Price = 0; ListView.SelectedIndexCollection SelectedIndexes = this.BreakfastListView.SelectedIndices; foreach (int Index in SelectedIndexes) { double ItemPrice = double.Parse( this.BreakfastListView.Items[Index].SubItems[1].Text); Price = Price + ItemPrice; } MessageBox.Show(string.Format("所选的早餐需要花费{0}人民币！", Price)); } } }