ListView.SelectedIndexCollection 類別

參考

定義

命名空間:: System.Windows.Forms

組件:: System.Windows.Forms.dll

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

表示包含在 ListView 控制項中所選取項目索引的集合。

public: ref class ListView::SelectedIndexCollection : System::Collections::IList

public class ListView.SelectedIndexCollection : System.Collections.IList

[System.ComponentModel.ListBindable(false)]
public class ListView.SelectedIndexCollection : System.Collections.IList

type ListView.SelectedIndexCollection = class
    interface IList
    interface ICollection
    interface IEnumerable

[<System.ComponentModel.ListBindable(false)>]
type ListView.SelectedIndexCollection = class
    interface IList
    interface ICollection
    interface IEnumerable

Public Class ListView.SelectedIndexCollection
Implements IList

繼承: Object
ListView.SelectedIndexCollection

屬性: ListBindableAttribute

實作: ICollection IEnumerable IList

範例

下列程式碼範例示範如何使用 SelectedIndices 、 SelectedIndexChanged 和 HeaderStyle 成員和 ListView.SelectedIndexCollection 類別。若要執行此範例，請將下列程式碼貼到表單中，其中包含 ListView 名為 ListView1 的物件和 TextBox 名為 TextBox1 的。 InitializeListView從表單的建構函式或 Load 事件處理常式呼叫方法。這個範例會要求事件處理常式與事件正確相關聯 SelectedIndexChanged 。

// 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 );
}

  // 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);
  }

' 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

// Uses the SelectedIndices property to retrieve and tally the  
// price of the selected menu items.
void ListView1_SelectedIndexChanged_UsingIndices( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   ListView::SelectedIndexCollection^ indexes = this->ListView1->SelectedIndices;
   double price = 0.0;
   System::Collections::IEnumerator^ myEnum1 = indexes->GetEnumerator();
   while ( myEnum1->MoveNext() )
   {
      int index = safe_cast<int>(myEnum1->Current);
      price += Double::Parse( this->ListView1->Items[ index ]->SubItems[ 1 ]->Text );
   }

   
   // Output the price to TextBox1.
   TextBox1->Text = price.ToString();
}

// Uses the SelectedIndices property to retrieve and tally the  
// price of the selected menu items.
private void ListView1_SelectedIndexChanged_UsingIndices(
    object sender, System.EventArgs e)
{

    ListView.SelectedIndexCollection indexes = 
        this.ListView1.SelectedIndices;
    
    double price = 0.0;
    foreach ( int index in indexes )
    {
        price += Double.Parse(
            this.ListView1.Items[index].SubItems[1].Text);
    }

    // Output the price to TextBox1.
    TextBox1.Text =  price.ToString();
}

' Uses the SelectedIndices property to retrieve and tally the price of  
' the selected menu items.
Private Sub ListView1_SelectedIndexChanged_UsingIndices _
    (ByVal sender As Object, ByVal e As System.EventArgs) _
    Handles ListView1.SelectedIndexChanged

    Dim indexes As ListView.SelectedIndexCollection = _
        Me.ListView1.SelectedIndices
    Dim index As Integer
    Dim price As Double = 0.0
    For Each index In indexes
        price += Double.Parse(Me.ListView1.Items(index).SubItems(1).Text)
    Next

    ' Output the price to TextBox1.
    TextBox1.Text = CType(price, String)
End Sub

備註

會將 ListView.SelectedIndexCollection 索引儲存至控制項中 ListView 選取的專案。中儲存 ListView.SelectedIndexCollection 的索引是中的 ListView.ListViewItemCollection 索引位置。會 ListView.ListViewItemCollection 儲存控制項中顯示的 ListView 所有專案。

下表顯示如何 ListView.ListViewItemCollection 儲存專案的範例， ListView 並在範例 ListView 中顯示其選取狀態。

索引	Item	ListView 中的選取狀態
0	Item1	未選取
1	Item2	已選取
2	Item3	未選取
3	Item4	已選取
4	Item5	已選取

下表根據 ListView.ListViewItemCollection 上表的範例，下表示范的顯示方式 ListView.SelectedIndexCollection 。

索引	ListViewItemCollection 中選取專案的索引
0	1
1	3
2	4

您可以使用這個類別的屬性和方法，搭配集合執行各種工作。方法 Contains 可讓您判斷中的 ListView.ListViewItemCollection 索引位置是否為儲存在中的 ListView.SelectedIndexCollection 其中一個索引。一旦您知道專案位於集合中，您就可以使用 IndexOf 方法來判斷索引在中 ListView.SelectedIndexCollection 的位置。

建構函式

ListView.SelectedIndexCollection(ListView)

初始化 ListView.SelectedIndexCollection 類別的新執行個體。

屬性

Count	取得集合中的項目數目。
IsReadOnly	取得值，表示集合是否為唯讀。
Item[Int32]	取得集合中位於指定索引處的索引值。

方法

Add(Int32)	加入位於 Items 陣列中指定索引處的項目至集合。
Clear()	清除集合中的項目。
Contains(Int32)	判斷指定的索引是否位於集合中。
CopyTo(Array, Int32)	將整個集合複製到現有陣列中的指定位置。
Equals(Object)	判斷指定的物件是否等於目前的物件。 (繼承來源 Object)
GetEnumerator()	傳回列舉值，其可用來在選取索引集合中重複。
GetHashCode()	做為預設雜湊函式。 (繼承來源 Object)
GetType()	取得目前執行個體的 Type。 (繼承來源 Object)
IndexOf(Int32)	從 ListView.SelectedIndexCollection 控制項的 ListView.ListViewItemCollection 傳回在所指定索引之 ListView 中的索引。
MemberwiseClone()	建立目前 Object 的淺層複製。 (繼承來源 Object)
Remove(Int32)	從 Items 移除位於 ListView.SelectedIndexCollection 集合中所指定索引處的項目。
ToString()	傳回代表目前物件的字串。 (繼承來源 Object)

明確介面實作

ICollection.IsSynchronized	取得值，表示是否同步化存取集合 (執行緒安全)。
ICollection.SyncRoot	取得可用來對控制項集合進行同步 (Synchronize) 存取的物件。
IList.Add(Object)	將項目新增至集合。
IList.Clear()	移除集合的所有項目。
IList.Contains(Object)	判斷指定的項目是否位於集合中。
IList.IndexOf(Object)	此 API 支援此產品基礎結構，但無法直接用於程式碼之中。傳回 ListView.SelectedIndexCollection 中的索引。 ListView.SelectedIndexCollection 包含 ListView.ListViewItemCollection 控制項的 ListView 中已選取項目之索引。
IList.Insert(Int32, Object)	在指定的索引位置，插入項目至集合之中。
IList.IsFixedSize	取得值，指出 ListView.SelectedIndexCollection 是否有固定的大小。
IList.Item[Int32]	取得或設定集合中的物件。
IList.Remove(Object)	移除集合中第一個出現的指定項目。
IList.RemoveAt(Int32)	從指定索引的集合移除項目。

擴充方法

Cast<TResult>(IEnumerable)	將 IEnumerable 的項目轉換成指定的型別。
OfType<TResult>(IEnumerable)	根據指定的型別來篩選 IEnumerable 的項目。
AsParallel(IEnumerable)	啟用查詢的平行化作業。
AsQueryable(IEnumerable)	將 IEnumerable 轉換成 IQueryable。

適用於

共用方式為

ListView.SelectedIndexCollection 類別

定義

範例

備註

建構函式

屬性

方法

明確介面實作

擴充方法

適用於

其他資源