ListView.SelectedListViewItemCollection クラス
アセンブリ: System.Windows.Forms (system.windows.forms.dll 内)


ListView.SelectedListViewItemCollection は ListView コントロールの選択された項目を格納します。ListView.SelectedListViewItemCollection に格納されている項目は、ListView.ListViewItemCollection に格納されている項目です。ListView.ListViewItemCollection は、ListView に表示されるすべての項目を格納します。
ListView の項目が ListView.ListViewItemCollection にどのように格納されているか、およびこの例の ListView コントロール内における項目の選択状態を次の表に示します。
前の表の ListView.ListViewItemCollection の例に基づいた ListView.SelectedListViewItemCollection の内容を次の表に示します。
このクラスのプロパティとメソッドを使用すると、コレクションを使用してさまざまなタスクを実行できます。Contains メソッドを使用すると、ListView.ListViewItemCollection クラスの項目が ListView.SelectedListViewItemCollection クラスのメンバかどうかを確認できます。コレクション内に項目があることが判明している場合は、IndexOf メソッドを使用して、ListView.SelectedListViewItemCollection 内の項目の位置を確認できます。

SelectedItems イベント、SelectedIndexChanged イベント、HeaderStyle のメンバ、および ListView.SelectedListViewItemCollection クラスを使用するコード例を次に示します。この例を実行するには、ListView1 という名前の ListView オブジェクトと TextBox1 という名前の TextBox が配置されているフォームに次のコードを貼り付けます。次に、フォームのコンストラクタまたは Load のイベント ハンドラで InitializeListView メソッドを呼び出します。この例では、イベント ハンドラが SelectedIndexChanged イベントに正しく関連付けられている必要があります。
' This method adds two columns to the ListView, setting the Text ' and TextAlign, and Width properties of each ColumnHeader. The ' HeaderStyle property is set to NonClickable since the ColumnClick ' event is not handled. Finally the method adds ListViewItems and ' SubItems to each column. Private Sub InitializeListView() Me.ListView1 = New System.Windows.Forms.ListView Me.ListView1.BackColor = System.Drawing.SystemColors.Control Me.ListView1.Dock = System.Windows.Forms.DockStyle.Top Me.ListView1.Location = New System.Drawing.Point(0, 0) Me.ListView1.Name = "ListView1" Me.ListView1.Size = New System.Drawing.Size(292, 130) Me.ListView1.TabIndex = 0 Me.ListView1.View = System.Windows.Forms.View.Details Me.ListView1.MultiSelect = True Me.ListView1.HideSelection = False ListView1.HeaderStyle = ColumnHeaderStyle.Nonclickable Dim columnHeader1 As New ColumnHeader With columnHeader1 .Text = "Breakfast Item" .TextAlign = HorizontalAlignment.Left .Width = 146 End With Dim columnHeader2 As New ColumnHeader With columnHeader2 .Text = "Price Each" .TextAlign = HorizontalAlignment.Center .Width = 142 End With Me.ListView1.Columns.Add(columnHeader1) Me.ListView1.Columns.Add(columnHeader2) Dim foodList() As String = New String() {"Juice", "Coffee", _ "Cereal & Milk", "Fruit Plate", "Toast & Jelly", _ "Bagel & Cream Cheese"} Dim foodPrice() As String = New String() {"1.09", "1.09", _ "2.19", "2.49", "1.49", "1.49"} Dim count As Integer For count = 0 To foodList.Length - 1 Dim listItem As New ListViewItem(foodList(count)) listItem.SubItems.Add(foodPrice(count)) ListView1.Items.Add(listItem) Next Me.Controls.Add(Me.ListView1) End Sub <br /><span space="preserve">...</span><br /> ' Uses the SelectedItems property to retrieve and tally the price ' of the selected menu items. Private Sub ListView1_SelectedIndexChanged_UsingItems _ (ByVal sender As Object, ByVal e As System.EventArgs) _ Handles ListView1.SelectedIndexChanged Dim breakfast As ListView.SelectedListViewItemCollection = _ Me.ListView1.SelectedItems Dim item As ListViewItem Dim price As Double = 0.0 For Each item In breakfast price += Double.Parse(item.SubItems(1).Text) Next ' Output the price to TextBox1. TextBox1.Text = CType(price, String) End Sub
// This method adds two columns to the ListView, setting the Text // and TextAlign, and Width properties of each ColumnHeader. The // HeaderStyle property is set to NonClickable since the ColumnClick // event is not handled. Finally the method adds ListViewItems and // SubItems to each column. private void InitializeListView() { this.ListView1 = new System.Windows.Forms.ListView(); this.ListView1.BackColor = System.Drawing.SystemColors.Control; this.ListView1.Dock = System.Windows.Forms.DockStyle.Top; this.ListView1.Location = new System.Drawing.Point(0, 0); this.ListView1.Name = "ListView1"; this.ListView1.Size = new System.Drawing.Size(292, 130); this.ListView1.TabIndex = 0; this.ListView1.View = System.Windows.Forms.View.Details; this.ListView1.MultiSelect = true; this.ListView1.HideSelection = false; this.ListView1.HeaderStyle = ColumnHeaderStyle.Nonclickable; ColumnHeader columnHeader1 = new ColumnHeader(); columnHeader1.Text = "Breakfast Item"; columnHeader1.TextAlign = HorizontalAlignment.Left; columnHeader1.Width = 146; ColumnHeader columnHeader2 = new ColumnHeader(); columnHeader2.Text = "Price Each"; columnHeader2.TextAlign = HorizontalAlignment.Center; columnHeader2.Width = 142; this.ListView1.Columns.Add(columnHeader1); this.ListView1.Columns.Add(columnHeader2); 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"}; for(int count=0; count < foodList.Length; count++) { ListViewItem listItem = new ListViewItem(foodList[count]); listItem.SubItems.Add(foodPrice[count]); ListView1.Items.Add(listItem); } this.Controls.Add(ListView1); } <br /><span space="preserve">...</span><br /> // Uses the SelectedItems property to retrieve and tally the price // of the selected menu items. private void ListView1_SelectedIndexChanged_UsingItems( object sender, System.EventArgs e) { ListView.SelectedListViewItemCollection breakfast = this.ListView1.SelectedItems; double price = 0.0; foreach ( ListViewItem item in breakfast ) { price += Double.Parse(item.SubItems[1].Text); } // Output the price to TextBox1. TextBox1.Text = price.ToString(); }
// This method adds two columns to the ListView, setting the Text // and TextAlign, and Width properties of each ColumnHeader. The // HeaderStyle property is set to NonClickable since the ColumnClick // event is not handled. Finally the method adds ListViewItems and // SubItems to each column. void InitializeListView() { this->ListView1 = gcnew System::Windows::Forms::ListView; this->ListView1->BackColor = System::Drawing::SystemColors::Control; this->ListView1->Dock = System::Windows::Forms::DockStyle::Top; this->ListView1->Location = System::Drawing::Point( 0, 0 ); this->ListView1->Name = "ListView1"; this->ListView1->Size = System::Drawing::Size( 292, 130 ); this->ListView1->TabIndex = 0; this->ListView1->View = System::Windows::Forms::View::Details; this->ListView1->MultiSelect = true; this->ListView1->HideSelection = false; this->ListView1->HeaderStyle = ColumnHeaderStyle::Nonclickable; ColumnHeader^ columnHeader1 = gcnew ColumnHeader; columnHeader1->Text = "Breakfast Item"; columnHeader1->TextAlign = HorizontalAlignment::Left; columnHeader1->Width = 146; ColumnHeader^ columnHeader2 = gcnew ColumnHeader; columnHeader2->Text = "Price Each"; columnHeader2->TextAlign = HorizontalAlignment::Center; columnHeader2->Width = 142; this->ListView1->Columns->Add( columnHeader1 ); this->ListView1->Columns->Add( columnHeader2 ); array<String^>^foodList = {"Juice","Coffee","Cereal & Milk","Fruit Plate","Toast & Jelly","Bagel & Cream Cheese"}; array<String^>^foodPrice = {"1.09","1.09","2.19" ,"2.49","1.49","1.49"}; for ( int count = 0; count < foodList->Length; count++ ) { ListViewItem^ listItem = gcnew ListViewItem( foodList[ count ] ); listItem->SubItems->Add( foodPrice[ count ] ); ListView1->Items->Add( listItem ); } this->Controls->Add( ListView1 ); } <br /><span space="preserve">...</span><br /> // Uses the SelectedItems property to retrieve and tally the price // of the selected menu items. void ListView1_SelectedIndexChanged_UsingItems( Object^ /*sender*/, System::EventArgs^ /*e*/ ) { ListView::SelectedListViewItemCollection^ breakfast = this->ListView1->SelectedItems; double price = 0.0; System::Collections::IEnumerator^ myEnum = breakfast->GetEnumerator(); while ( myEnum->MoveNext() ) { ListViewItem^ item = safe_cast<ListViewItem^>(myEnum->Current); price += Double::Parse( item->SubItems[ 1 ]->Text ); } // Output the price to TextBox1. TextBox1->Text = price.ToString(); }
// This method adds two columns to the ListView, setting the Text // and TextAlign, and Width properties of each ColumnHeader. The // HeaderStyle property is set to NonClickable since the ColumnClick // event is not handled. Finally the method adds ListViewItems and // SubItems to each column. private void InitializeListView() { this.listView1 = new System.Windows.Forms.ListView(); this.listView1.set_BackColor( System.Drawing.SystemColors.get_Control()); this.listView1.set_Dock(System.Windows.Forms.DockStyle.Top); this.listView1.set_Location(new System.Drawing.Point(0, 0)); this.listView1.set_Name("listView1"); this.listView1.set_Size(new System.Drawing.Size(292, 130)); this.listView1.set_TabIndex(0); this.listView1.set_View(System.Windows.Forms.View.Details); this.listView1.set_MultiSelect(true); this.listView1.set_HideSelection(false); this.listView1.set_HeaderStyle(ColumnHeaderStyle.Nonclickable); ColumnHeader columnHeader1 = new ColumnHeader(); columnHeader1.set_Text("Breakfast Item"); columnHeader1.set_TextAlign(HorizontalAlignment.Left); columnHeader1.set_Width(146); ColumnHeader columnHeader2 = new ColumnHeader(); columnHeader2.set_Text("Price Each"); columnHeader2.set_TextAlign(HorizontalAlignment.Center); columnHeader2.set_Width(142); this.listView1.get_Columns().Add(columnHeader1); this.listView1.get_Columns().Add(columnHeader2); 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" }; for (int count = 0; count < foodList.get_Length(); count++) { ListViewItem listItem = new ListViewItem( foodList.get_Item(count).ToString()); listItem.get_SubItems().Add(foodPrice.get_Item(count).ToString()); listView1.get_Items().Add(listItem); } this.get_Controls().Add(listView1); } //InitializeListView <br /><span space="preserve">...</span><br /> // Uses the SelectedItems property to retrieve and tally the price // of the selected menu items. private void listView1_SelectedIndexChanged_UsingItems(Object sender, System.EventArgs e) { ListView.SelectedListViewItemCollection breakfast = this.listView1.get_SelectedItems(); double price = 0.0; for (int iCtr = 0; iCtr < breakfast.get_Count(); iCtr++) { ListViewItem item = breakfast.get_Item(iCtr); price += System.Double.Parse(item.get_SubItems().get_Item(1). get_Text().ToString()); } // Output the price to textBox1. textBox1.set_Text(System.Convert.ToString(price)); } //listView1_SelectedIndexChanged_UsingItems

System.Windows.Forms.ListView.SelectedListViewItemCollection


Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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