ListViewGroupCollection ListViewGroupCollection ListViewGroupCollection ListViewGroupCollection Class

定義

ListView コントロール内のグループのコレクションを表します。Represents the collection of groups within a ListView control.

public ref class ListViewGroupCollection : System::Collections::IList
[System.ComponentModel.ListBindable(false)]
public class ListViewGroupCollection : System.Collections.IList
type ListViewGroupCollection = class
    interface IList
    interface ICollection
    interface IEnumerable
Public Class ListViewGroupCollection
Implements IList
継承
ListViewGroupCollectionListViewGroupCollectionListViewGroupCollectionListViewGroupCollection
属性
実装

次の例では、使用する方法、ListViewサブ項目に値の詳細ビューで項目を整理するグループ化機能。The following example demonstrates how to use the ListView grouping feature to organize items by subitem value in the details view. この形式のグループ化は、Windows エクスプ ローラーで使用されるグループ化に似ています。This form of grouping is similar to the grouping used in Windows Explorer. 例では、グループは動的に作成されます。In the example, the groups are created dynamically. サブ項目の各列の一意のサブ項目の値ごとに 1 つのグループが作成されます。For each subitem column, one group is created for each unique subitem value. 親項目列で、一意の初期名ごとに 1 つのグループが作成されます。For the parent item column, one group is created for each unique initial letter. 列のヘッダーをクリックすると、その列に対して作成されたグループに、項目が並べ替えられます。Clicking the header of a column sorts the items into the groups created for that column. 同じ列ヘッダーを再度クリックすると、グループの順序を反転させます。Clicking the same column header again reverses the order of the groups.

#using <mscorlib.dll>
#using <System.Drawing.dll>
#using <System.dll>
#using <System.Windows.Forms.dll>
using namespace System;
using namespace System::Collections; 
using namespace System::Windows::Forms;

public ref class ListViewGroupsExample : public Form
{
private:
   ListView^ myListView;
   bool isRunningXPOrLater;

   // Declare a Hashtable array in which to store the groups.
   array<Hashtable^>^ groupTables;

   // Declare a variable to store the current grouping column.
   int groupColumn;

public:
   ListViewGroupsExample()
   {
      groupColumn = 0;
      // Initialize myListView.
      myListView = gcnew ListView();
      myListView->Dock = DockStyle::Fill;
      myListView->View = View::Details;
      myListView->Sorting = SortOrder::Ascending;

      // Create and initialize column headers for myListView.
      ColumnHeader^ columnHeader0 = gcnew ColumnHeader();
      columnHeader0->Text = "Title";
      columnHeader0->Width = -1;
      ColumnHeader^ columnHeader1 = gcnew ColumnHeader();
      columnHeader1->Text = "Author";
      columnHeader1->Width = -1;
      ColumnHeader^ columnHeader2 = gcnew ColumnHeader();
      columnHeader2->Text = "Year";
      columnHeader2->Width = -1;

      // Add the column headers to myListView.

      array<ColumnHeader^>^ temp0 = {columnHeader0, columnHeader1, columnHeader2};
      myListView->Columns->AddRange(temp0);

      // Add a handler for the ColumnClick event.
      myListView->ColumnClick += 
         gcnew ColumnClickEventHandler(this, &ListViewGroupsExample::myListView_ColumnClick);

      // Create items and add them to myListView.

      array<String^>^ temp1 = {"Programming Windows", "Petzold, Charles", "1998"};
      ListViewItem^ item0 = gcnew ListViewItem( temp1 );

      array<String^>^ temp2 = {"Code: The Hidden Language of Computer Hardware and Software",
         "Petzold, Charles", "2000"};
      ListViewItem^ item1 = gcnew ListViewItem( temp2 );

      array<String^>^ temp3 = {"Programming Windows with C#", "Petzold, Charles", "2001"};
      ListViewItem^ item2 = gcnew ListViewItem( temp3 );

      array<String^>^ temp4 = {"Coding Techniques for Microsoft Visual Basic .NET",
         "Connell, John", "2001"};
      ListViewItem^ item3 = gcnew ListViewItem( temp4 );

      array<String^>^ temp5 = {"C# for Java Developers", "Jones, Allen & Freeman, Adam",
         "2002"};
      ListViewItem^ item4 = gcnew ListViewItem( temp5 );

      array<String^>^ temp6 = {"Microsoft .NET XML Web Services Step by Step",
         "Jones, Allen & Freeman, Adam", "2002"};
      ListViewItem^ item5 = gcnew ListViewItem( temp6 );

      array<ListViewItem^>^ temp7 = {item0, item1, item2, item3, item4, item5};
      myListView->Items->AddRange( temp7 );

      // Determine whether Windows XP or a later 
      // operating system is present.
      isRunningXPOrLater = false;

      if (System::Environment::OSVersion->Version->Major > 5 ||
         ( System::Environment::OSVersion->Version->Major == 5 &&
         System::Environment::OSVersion->Version->Minor >= 1) )
      {
         isRunningXPOrLater = true;
      }

      if (isRunningXPOrLater)
      {
         // Create the groupsTable array and populate it with one 
         // hash table for each column.
         groupTables = gcnew array<Hashtable^>(myListView->Columns->Count);
         for (int column = 0; column < myListView->Columns->Count; column++)
         {
            // Create a hash table containing all the groups 
            // needed for a single column.
            groupTables[column] = CreateGroupsTable(column);
         }

         // Start with the groups created for the Title column.
         SetGroups(0);
      }

      // Initialize the form.
      this->Controls->Add(myListView);
      this->Size = System::Drawing::Size(550, 330);
      this->Text = "ListView Groups Example";
   }

   // Groups the items using the groups created for the clicked 
   // column.
private:
   void myListView_ColumnClick(
      Object^ /*sender*/, ColumnClickEventArgs^ e)
   {
      // Set the sort order to ascending when changing
      // column groups; otherwise, reverse the sort order.
      if ( myListView->Sorting == SortOrder::Descending || 
         ( isRunningXPOrLater && (e->Column != groupColumn) ) )
      {
         myListView->Sorting = SortOrder::Ascending;
      }
      else 
      {
         myListView->Sorting = SortOrder::Descending;
      }
      groupColumn = e->Column;

      // Set the groups to those created for the clicked column.
      if (isRunningXPOrLater)
      {
         SetGroups(e->Column);
      }
   }

   // Sets myListView to the groups created for the specified column.
private:
   void SetGroups(int column)
   {
      // Remove the current groups.
      myListView->Groups->Clear();

      // Retrieve the hash table corresponding to the column.
      Hashtable^ groups = dynamic_cast<Hashtable^>(groupTables[column]);

      // Copy the groups for the column to an array.
      array<ListViewGroup^>^ groupsArray = gcnew array<ListViewGroup^>(groups->Count);
      groups->Values->CopyTo(groupsArray, 0);

      // Sort the groups and add them to myListView.
      Array::Sort(groupsArray, gcnew ListViewGroupSorter(myListView->Sorting));
      myListView->Groups->AddRange(groupsArray);

      // Iterate through the items in myListView, assigning each 
      // one to the appropriate group.
      IEnumerator^ myEnum = myListView->Items->GetEnumerator();
      while (myEnum->MoveNext())
      {
         ListViewItem^ item = safe_cast<ListViewItem^>(myEnum->Current);
         // Retrieve the subitem text corresponding to the column.
         String^ subItemText = item->SubItems[column]->Text;

         // For the Title column, use only the first letter.
         if (column == 0) 
         {
            subItemText = subItemText->Substring(0, 1);
         }

         // Assign the item to the matching group.
         item->Group = dynamic_cast<ListViewGroup^>(groups[subItemText]);
      }
   }

   // Creates a Hashtable object with one entry for each unique
   // subitem value (or initial letter for the parent item)
   // in the specified column.
private:
   Hashtable^ CreateGroupsTable(int column)
   {
      // Create a Hashtable object.
      Hashtable^ groups = gcnew Hashtable();

      // Iterate through the items in myListView.
      IEnumerator^ myEnum1 = myListView->Items->GetEnumerator();
      while (myEnum1->MoveNext())
      {
         ListViewItem^ item = safe_cast<ListViewItem^>(myEnum1->Current);
         // Retrieve the text value for the column.
         String^ subItemText = item->SubItems[column]->Text;

         // Use the initial letter instead if it is the first column.
         if (column == 0) 
         {
            subItemText = subItemText->Substring(0, 1);
         }

         // If the groups table does not already contain a group
         // for the subItemText value, add a new group using the 
         // subItemText value for the group header and Hashtable key.
         if (!groups->Contains(subItemText))
         {
            groups->Add( subItemText, gcnew ListViewGroup(subItemText, 
               HorizontalAlignment::Left) );
         }
      }

      // Return the Hashtable object.
      return groups;
   }

   // Sorts ListViewGroup objects by header value.
   ref class ListViewGroupSorter : public IComparer
   {
   private:
      SortOrder order;

      // Stores the sort order.
   public:
      ListViewGroupSorter(SortOrder theOrder) 
      { 
         order = theOrder;
      }

      // Compares the groups by header value, using the saved sort
      // order to return the correct value.
      virtual int Compare(Object^ x, Object^ y)
      {
         int result = String::Compare(
            (dynamic_cast<ListViewGroup^>(x))->Header,
            (dynamic_cast<ListViewGroup^>(y))->Header
            );
         if (order == SortOrder::Ascending)
         {
            return result;
         }
         else 
         {
            return -result;
         }
      }
   };
};

[STAThread]
int main() 
{
   Application::EnableVisualStyles();
   Application::Run(gcnew ListViewGroupsExample());
}
using System;
using System.Collections; 
using System.Windows.Forms;

public class ListViewGroupsExample : Form
{
    private ListView myListView;

    // Determine whether Windows XP or a later
    // operating system is present.
    private bool isRunningXPOrLater = 
        OSFeature.Feature.IsPresent(OSFeature.Themes);

    // Declare a Hashtable array in which to store the groups.
    private Hashtable[] groupTables;

    // Declare a variable to store the current grouping column.
    int groupColumn = 0;

    public ListViewGroupsExample()
    {
        // Initialize myListView.
        myListView = new ListView();
        myListView.Dock = DockStyle.Fill;
        myListView.View = View.Details;
        myListView.Sorting = SortOrder.Ascending;

        // Create and initialize column headers for myListView.
        ColumnHeader columnHeader0 = new ColumnHeader();
        columnHeader0.Text = "Title";
        columnHeader0.Width = -1;
        ColumnHeader columnHeader1 = new ColumnHeader();
        columnHeader1.Text = "Author";
        columnHeader1.Width = -1;
        ColumnHeader columnHeader2 = new ColumnHeader();
        columnHeader2.Text = "Year";
        columnHeader2.Width = -1;

        // Add the column headers to myListView.
        myListView.Columns.AddRange(new ColumnHeader[] 
            {columnHeader0, columnHeader1, columnHeader2});

        // Add a handler for the ColumnClick event.
        myListView.ColumnClick += 
            new ColumnClickEventHandler(myListView_ColumnClick);

        // Create items and add them to myListView.
        ListViewItem item0 = new ListViewItem( new string[] 
            {"Programming Windows", 
            "Petzold, Charles", 
            "1998"} );
        ListViewItem item1 = new ListViewItem( new string[] 
            {"Code: The Hidden Language of Computer Hardware and Software", 
            "Petzold, Charles", 
            "2000"} );
        ListViewItem item2 = new ListViewItem( new string[] 
            {"Programming Windows with C#", 
            "Petzold, Charles", 
            "2001"} );
        ListViewItem item3 = new ListViewItem( new string[] 
            {"Coding Techniques for Microsoft Visual Basic .NET", 
            "Connell, John", 
            "2001"} );
        ListViewItem item4 = new ListViewItem( new string[] 
            {"C# for Java Developers", 
            "Jones, Allen & Freeman, Adam", 
            "2002"} );
        ListViewItem item5 = new ListViewItem( new string[] 
            {"Microsoft .NET XML Web Services Step by Step", 
            "Jones, Allen & Freeman, Adam", 
            "2002"} );
        myListView.Items.AddRange(
            new ListViewItem[] {item0, item1, item2, item3, item4, item5});

        if (isRunningXPOrLater)
        {
            // Create the groupsTable array and populate it with one 
            // hash table for each column.
            groupTables = new Hashtable[myListView.Columns.Count];
            for (int column = 0; column < myListView.Columns.Count; column++)
            {
                // Create a hash table containing all the groups 
                // needed for a single column.
                groupTables[column] = CreateGroupsTable(column);
            }

            // Start with the groups created for the Title column.
            SetGroups(0);
        }

        // Initialize the form.
        this.Controls.Add(myListView);
        this.Size = new System.Drawing.Size(550, 330);
        this.Text = "ListView Groups Example";
    }

    [STAThread]
    static void Main() 
    {
        Application.EnableVisualStyles();
        Application.Run(new ListViewGroupsExample());
    }

    // Groups the items using the groups created for the clicked 
    // column.
    private void myListView_ColumnClick(
        object sender, ColumnClickEventArgs e)
    {
        // Set the sort order to ascending when changing
        // column groups; otherwise, reverse the sort order.
        if ( myListView.Sorting == SortOrder.Descending || 
            ( isRunningXPOrLater && (e.Column != groupColumn) ) )
        {
            myListView.Sorting = SortOrder.Ascending;
        }
        else 
        {
            myListView.Sorting = SortOrder.Descending;
        }
        groupColumn = e.Column;

        // Set the groups to those created for the clicked column.
        if (isRunningXPOrLater)
        {
            SetGroups(e.Column);
        }
    }

    // Sets myListView to the groups created for the specified column.
    private void SetGroups(int column)
    {
        // Remove the current groups.
        myListView.Groups.Clear();

        // Retrieve the hash table corresponding to the column.
        Hashtable groups = (Hashtable)groupTables[column];

        // Copy the groups for the column to an array.
        ListViewGroup[] groupsArray = new ListViewGroup[groups.Count];
        groups.Values.CopyTo(groupsArray, 0);

        // Sort the groups and add them to myListView.
        Array.Sort(groupsArray, new ListViewGroupSorter(myListView.Sorting));
        myListView.Groups.AddRange(groupsArray);

        // Iterate through the items in myListView, assigning each 
        // one to the appropriate group.
        foreach (ListViewItem item in myListView.Items)
        {
            // Retrieve the subitem text corresponding to the column.
            string subItemText = item.SubItems[column].Text;

            // For the Title column, use only the first letter.
            if (column == 0) 
            {
                subItemText = subItemText.Substring(0, 1);
            }

            // Assign the item to the matching group.
            item.Group = (ListViewGroup)groups[subItemText];
        }
    }

    // Creates a Hashtable object with one entry for each unique
    // subitem value (or initial letter for the parent item)
    // in the specified column.
    private Hashtable CreateGroupsTable(int column)
    {
        // Create a Hashtable object.
        Hashtable groups = new Hashtable();

        // Iterate through the items in myListView.
        foreach (ListViewItem item in myListView.Items)
        {
            // Retrieve the text value for the column.
            string subItemText = item.SubItems[column].Text;

            // Use the initial letter instead if it is the first column.
            if (column == 0) 
            {
                subItemText = subItemText.Substring(0, 1);
            }

            // If the groups table does not already contain a group
            // for the subItemText value, add a new group using the 
            // subItemText value for the group header and Hashtable key.
            if (!groups.Contains(subItemText))
            {
                groups.Add( subItemText, new ListViewGroup(subItemText, 
                    HorizontalAlignment.Left) );
            }
        }

        // Return the Hashtable object.
        return groups;
    }

    // Sorts ListViewGroup objects by header value.
    private class ListViewGroupSorter : IComparer
    {
        private SortOrder order;

        // Stores the sort order.
        public ListViewGroupSorter(SortOrder theOrder) 
        { 
            order = theOrder;
        }

        // Compares the groups by header value, using the saved sort
        // order to return the correct value.
        public int Compare(object x, object y)
        {
            int result = String.Compare(
                ((ListViewGroup)x).Header,
                ((ListViewGroup)y).Header
            );
            if (order == SortOrder.Ascending)
            {
                return result;
            }
            else 
            {
                return -result;
            }
        }
    }

}
Imports System
Imports System.Collections
Imports System.Windows.Forms

Public Class ListViewGroupsExample
    Inherits Form

    Private myListView As ListView

    ' Determine whether Windows XP or a later
    ' operating system is present.
    Private isRunningXPOrLater As Boolean = _
        OSFeature.Feature.IsPresent(OSFeature.Themes)
    
    ' Declare a Hashtable array in which to store the groups.
    Private groupTables() As Hashtable
    
    ' Declare a variable to store the current grouping column.
    Private groupColumn As Integer = 0
    
    Public Sub New()
        ' Initialize myListView.
        myListView = New ListView()
        myListView.Dock = DockStyle.Fill
        myListView.View = View.Details
        myListView.Sorting = SortOrder.Ascending
        
        ' Create and initialize column headers for myListView.
        Dim columnHeader0 As New ColumnHeader()
        columnHeader0.Text = "Title"
        columnHeader0.Width = -1
        Dim columnHeader1 As New ColumnHeader()
        columnHeader1.Text = "Author"
        columnHeader1.Width = -1
        Dim columnHeader2 As New ColumnHeader()
        columnHeader2.Text = "Year"
        columnHeader2.Width = -1
        
        ' Add the column headers to myListView.
        myListView.Columns.AddRange( New ColumnHeader() _
            {columnHeader0, columnHeader1, columnHeader2} )
        
        ' Add a handler for the ColumnClick event.
        AddHandler myListView.ColumnClick, AddressOf myListView_ColumnClick
        
        ' Create items and add them to myListView.
        Dim item0 As New ListViewItem( New String() _
            {"Programming Windows", _
            "Petzold, Charles", _
            "1998"} )
        Dim item1 As New ListViewItem( New String() _
            {"Code: The Hidden Language of Computer Hardware and Software", _
            "Petzold, Charles", _
            "2000"} )
        Dim item2 As New ListViewItem( New String() _
            {"Programming Windows with C#", _
            "Petzold, Charles", _
            "2001"} )
        Dim item3 As New ListViewItem( New String() _
            {"Coding Techniques for Microsoft Visual Basic .NET", _
            "Connell, John", _
            "2001"} )
        Dim item4 As New ListViewItem( New String() _
            {"C# for Java Developers", _
            "Jones, Allen / Freeman, Adam", _
            "2002"} )
        Dim item5 As New ListViewItem( New String() _
            {"Microsoft .NET XML Web Services Step by Step", _
            "Jones, Allen / Freeman, Adam", _
            "2002"} )
        myListView.Items.AddRange( _
            New ListViewItem() {item0, item1, item2, item3, item4, item5})
        
        If isRunningXPOrLater
            ' Create the groupsTable array and populate it with one 
            ' hash table for each column.
            groupTables = New Hashtable(myListView.Columns.Count) {}
            Dim column As Integer
            For column = 0 To myListView.Columns.Count - 1
                ' Create a hash table containing all the groups 
                ' needed for a single column.
                groupTables(column) = CreateGroupsTable(column)
            Next column
            
            ' Start with the groups created for the Title column.
            SetGroups(0)
        End If
        
        ' Initialize the form.
        Me.Controls.Add(myListView)
        Me.Size = New System.Drawing.Size(550, 330)
        Me.Text = "ListView Groups Example"
    End Sub 'New
    
    <STAThread()> _
    Shared Sub Main()
        Application.EnableVisualStyles()
        Application.Run(New ListViewGroupsExample())
    End Sub 'Main
    
    ' Groups the items using the groups created for the clicked 
    ' column.
    Private Sub myListView_ColumnClick( _
        sender As Object, e As ColumnClickEventArgs)

        ' Set the sort order to ascending when changing
        ' column groups; otherwise, reverse the sort order.
        If myListView.Sorting = SortOrder.Descending OrElse _
            isRunningXPOrLater And e.Column <> groupColumn Then
            myListView.Sorting = SortOrder.Ascending
        Else
            myListView.Sorting = SortOrder.Descending
        End If
        groupColumn = e.Column
        
        ' Set the groups to those created for the clicked column.
        If isRunningXPOrLater Then
            SetGroups(e.Column)
        End If
    End Sub 'myListView_ColumnClick
    
    ' Sets myListView to the groups created for the specified column.
    Private Sub SetGroups(column As Integer)
        ' Remove the current groups.
        myListView.Groups.Clear()
        
        ' Retrieve the hash table corresponding to the column.
        Dim groups As Hashtable = CType(groupTables(column), Hashtable)
        
        ' Copy the groups for the column to an array.
        Dim groupsArray(groups.Count - 1) As ListViewGroup
        groups.Values.CopyTo(groupsArray, 0)
        
        ' Sort the groups and add them to myListView.
        Array.Sort(groupsArray, New ListViewGroupSorter(myListView.Sorting))
        myListView.Groups.AddRange(groupsArray)
        
        ' Iterate through the items in myListView, assigning each 
        ' one to the appropriate group.
        Dim item As ListViewItem
        For Each item In myListView.Items
            ' Retrieve the subitem text corresponding to the column.
            Dim subItemText As String = item.SubItems(column).Text
            
            ' For the Title column, use only the first letter.
            If column = 0 Then
                subItemText = subItemText.Substring(0, 1)
            End If 

            ' Assign the item to the matching group.
            item.Group = CType(groups(subItemText), ListViewGroup)
        Next item
    End Sub 'SetGroups

    ' Creates a Hashtable object with one entry for each unique
    ' subitem value (or initial letter for the parent item)
    ' in the specified column.
    Private Function CreateGroupsTable(column As Integer) As Hashtable
        ' Create a Hashtable object.
        Dim groups As New Hashtable()
        
        ' Iterate through the items in myListView.
        Dim item As ListViewItem
        For Each item In myListView.Items
            ' Retrieve the text value for the column.
            Dim subItemText As String = item.SubItems(column).Text
            
            ' Use the initial letter instead if it is the first column.
            If column = 0 Then
                subItemText = subItemText.Substring(0, 1)
            End If 

            ' If the groups table does not already contain a group
            ' for the subItemText value, add a new group using the 
            ' subItemText value for the group header and Hashtable key.
            If Not groups.Contains(subItemText) Then
                groups.Add( subItemText, New ListViewGroup(subItemText, _
                    HorizontalAlignment.Left) )
            End If
        Next item
        
        ' Return the Hashtable object.
        Return groups
    End Function 'CreateGroupsTable

    ' Sorts ListViewGroup objects by header value.
    Private Class ListViewGroupSorter
        Implements IComparer 
        
        Private order As SortOrder
        
        ' Stores the sort order.
        Public Sub New(theOrder As SortOrder)
            order = theOrder
        End Sub 'New
        
        ' Compares the groups by header value, using the saved sort
        ' order to return the correct value.
        Public Function Compare(x As Object, y As Object) As Integer _
            Implements IComparer.Compare
            Dim result As Integer = String.Compare( _
                CType(x, ListViewGroup).Header, _
                CType(y, ListViewGroup).Header )
            If order = SortOrder.Ascending Then
                Return result
            Else
                Return -result
            End If
        End Function 'Compare
    End Class 'ListViewGroupSorter 

End Class 'ListViewGroupsExample

注釈

使用して、ListView.Groupsを取得するプロパティ、ListViewGroupCollectionに関連付けられている、ListViewコントロール。Use the ListView.Groups property to get the ListViewGroupCollection associated with a ListView control. このコレクションに含まれる、ListViewGroupコントロール内に表示されるグループを表すオブジェクトと、ListView.Viewプロパティが以外の値に設定されてView.Listします。This collection contains the ListViewGroup objects that represent the groups shown in the control when the ListView.View property is set to a value other than View.List. ヘッダー ラベルを持つ既定のグループにグループに割り当てられていないすべての項目が表示されます"DefaultGroup{0}"。Any items that are not assigned to a group will appear in the default group, which has the header label "DefaultGroup{0}". 既定のグループが含まれていない、ListView.Groupsコレクションを変更することはできません。The default group is not contained in the ListView.Groups collection, and cannot be altered. 主に、すべての項目がグループに正しく追加されていることを確認する、デバッグに便利です。It is primarily useful in debugging to ensure that all items have been properly added to groups. 内のグループがない場合、ListView.Groupsコレクションをグループ化機能が無効になっています。If there are no groups in the ListView.Groups collection, the grouping feature is disabled.

使用して、Addメソッドを 1 つのグループをコレクションに追加します。Use the Add method to add a single group to the collection. 使用して、Insertコレクション内の特定のインデックス位置にあるグループに追加するメソッド。Use the Insert method to add a group at a particular index within the collection. グループを削除するには、使用、Removeメソッド。To remove a group, use the Remove method. 使用して、RemoveAt特定のインデックス位置にあるグループを削除するメソッド。Use the RemoveAt method to remove the group at a particular index.

追加することはできません、ListViewGroupを 2 回以上のコレクション。You cannot add a ListViewGroup to the collection more than once. コレクション内のグループの位置を変更するには、最初に、コレクションから削除され、目的の場所に挿入されます。To reposition a group within the collection, it must first be removed from the collection, and then inserted at the desired location. 使用して、Containsする特定のグループがコレクション内に既にあるかどうかを判断するメソッド。Use the Contains method to determine whether a particular group is already in the collection. コレクション内のグループのインデックスを取得する、IndexOfメソッド。To retrieve the index of a group within the collection, use the IndexOf method. 取得またはの特定のインデックス位置にあるグループを設定することができます、Item[Int32]インデクサーです。You can get or set the group at a particular index with the Item[Int32] indexer.

使用して、AddRangeコレクションに複数のグループを追加するメソッド。Use the AddRange method to add multiple groups to the collection. グループの配列として複数のグループを追加することができます、ListViewGroupCollectionを通じて取得した、ListView.Groups別のプロパティListViewコントロール。You can add multiple groups either as an array of groups or as a ListViewGroupCollection that you retrieve through the ListView.Groups property of another ListView control. 使用して、Clearコレクションからすべてのグループを削除する方法。Use the Clear method to remove all the groups from the collection.

注意

RemoveRemoveAt、およびClearメソッドは、コレクションからグループを削除しますからのアイテムを削除しないでください、ListViewコントロール。The Remove, RemoveAt, and Clear methods remove groups from the collection, but do not remove any items from the ListView control. 内のグループがない場合、ListView.Groupsコレクションのグループ化機能が無効になっているし、通常はコントロール内のすべての項目が表示されます。If there are no groups in the ListView.Groups collection, the grouping feature is disabled and all items in the control are displayed normally.

AddRangeClearメソッドは、複数の方法で項目をグループ化を提供する場合に便利です、ListViewコントロール。The AddRange and Clear methods are useful when you want to provide multiple ways to group the items in a ListView control. これを行うには、複数のグループの配列を作成します。To do this, create multiple group arrays. まず、グループ化を変更するを使用して、Clearメソッドを使用して、コレクションからすべてのグループを削除する、AddRangeメソッドを表示するグループの [次へ] の配列を追加します。To change the grouping, first use the Clear method to remove all the groups from the collection, then use the AddRange method to add the next array of groups to display.

使用して、CopyTo互換性のある、指定したインデックスから始まる配列にコレクションのグループをコピーする方法。Use the CopyTo method to copy the groups in a collection to a compatible array starting at a specified index. これは便利ですが、たとえばを使用して、コレクション内のグループを並べ替えるときに、Array.Sortメソッド。This is useful, for example, when you want to sort the groups in the collection using the Array.Sort method. これを行うには、グループを互換性のある配列にコピーし、配列を並べ替えます。To do this, copy the groups into a compatible array, then sort the array. 次に、使用、 Clear 、コレクションからすべてのグループを削除しを使用するメソッド、AddRange並べ替えられた配列をコレクションに追加するメソッド。Next, use the Clear method to remove all the groups from the collection, then use the AddRange method to add the sorted array back to the collection.

使用して、Countプロパティをコレクション内のグループの数を確認します。Use the Count property to determine how many groups are in the collection. コレクションを反復処理に使用して、IEnumeratorから返される、GetEnumeratorメソッド。To iterate through the collection, use the IEnumerator returned from the GetEnumerator method.

注意

アプリケーションを呼び出すときにグループ化機能が Windows XP および Windows Server 2003 ファミリでのみ使用できますが、Application.EnableVisualStylesメソッド。The grouping feature is available only on Windows XP and the Windows Server 2003 family when your application calls the Application.EnableVisualStyles method. 以前のオペレーティング システムのグループに関連するすべてのコードは無視され、グループは表示されません。On earlier operating systems, any code relating to groups will be ignored and the groups will not appear. その結果、グループ化機能に依存するすべてのコードが正しく動作しない可能性があります。As a result, any code that depends on the grouping feature might not work correctly. グループ化機能が使用可能かどうかを決定するテストを含めるし、が利用できない場合は、代替機能を提供する可能性があります。You might want to include a test that determines whether the grouping feature is available, and provide alternate functionality when it is unavailable. たとえば、グループ、並べ替えをサポートしないオペレーティング システムで実行されているときに、別の並べ替えを提供する可能性があります。For example, you might want to provide alternate sorting when running on operating systems that do not support sorting by group.

挿入マーク機能は、オペレーティング システムのテーマ機能を提供するのと同じライブラリによって提供されます。The insertion mark feature is provided by the same library that provides the operating system themes feature. このライブラリの可用性を確認するには、呼び出し、FeatureSupport.IsPresent(Object)メソッドのオーバー ロードを渡します、OSFeature.Themes値。To check for the availability of this library, call the FeatureSupport.IsPresent(Object) method overload and pass in the OSFeature.Themes value.

プロパティ

Count Count Count Count

コレクション内のグループの数を取得します。Gets the number of groups in the collection.

Item[Int32] Item[Int32] Item[Int32] Item[Int32]

コレクション内の指定したインデックスにある ListViewGroup を取得または設定します。Gets or sets the ListViewGroup at the specified index within the collection.

Item[String] Item[String] Item[String] Item[String]

指定された ListViewGroup プロパティ値で、Name を取得または設定します。Gets or sets the ListViewGroup with the specified Name property value.

メソッド

Add(ListViewGroup) Add(ListViewGroup) Add(ListViewGroup) Add(ListViewGroup)

指定された ListViewGroup をコレクションに追加します。Adds the specified ListViewGroup to the collection.

Add(String, String) Add(String, String) Add(String, String) Add(String, String)

新しい ListViewGroup をコレクションに追加します。指定された値を使用して、Name プロパティおよび Header プロパティが初期化されます。Adds a new ListViewGroup to the collection using the specified values to initialize the Name and Header properties

AddRange(ListViewGroupCollection) AddRange(ListViewGroupCollection) AddRange(ListViewGroupCollection) AddRange(ListViewGroupCollection)

既存の ListViewGroupCollection 内のグループをコレクションに追加します。Adds the groups in an existing ListViewGroupCollection to the collection.

AddRange(ListViewGroup[]) AddRange(ListViewGroup[]) AddRange(ListViewGroup[]) AddRange(ListViewGroup[])

コレクションにグループの配列を追加します。Adds an array of groups to the collection.

Clear() Clear() Clear() Clear()

コレクションからすべてのグループを削除します。Removes all groups from the collection.

Contains(ListViewGroup) Contains(ListViewGroup) Contains(ListViewGroup) Contains(ListViewGroup)

指定したグループがコレクション内にあるかどうかを判断します。Determines whether the specified group is located in the collection.

CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32) CopyTo(Array, Int32)

コピー先配列の指定されたインデックスを開始位置として、コレクション内のグループを互換性がある 1 次元 Array にコピーします。Copies the groups in the collection to a compatible one-dimensional Array, starting at the specified index of the target array.

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

指定したオブジェクトが、現在のオブジェクトと等しいかどうかを判断します。Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetEnumerator() GetEnumerator() GetEnumerator() GetEnumerator()

コレクションを反復処理するのに使用できる列挙子を返します。Returns an enumerator used to iterate through the collection.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

既定のハッシュ関数として機能します。Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

現在のインスタンスの Type を取得します。Gets the Type of the current instance.

(Inherited from Object)
IndexOf(ListViewGroup) IndexOf(ListViewGroup) IndexOf(ListViewGroup) IndexOf(ListViewGroup)

コレクション内の指定した ListViewGroup のインデックスを返します。Returns the index of the specified ListViewGroup within the collection.

Insert(Int32, ListViewGroup) Insert(Int32, ListViewGroup) Insert(Int32, ListViewGroup) Insert(Int32, ListViewGroup)

コレクション内の指定したインデックス位置に、指定した ListViewGroup を挿入します。Inserts the specified ListViewGroup into the collection at the specified index.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

現在の Object の簡易コピーを作成します。Creates a shallow copy of the current Object.

(Inherited from Object)
Remove(ListViewGroup) Remove(ListViewGroup) Remove(ListViewGroup) Remove(ListViewGroup)

指定された ListViewGroup をコレクションから削除します。Removes the specified ListViewGroup from the collection.

RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32) RemoveAt(Int32)

コレクション内の指定されたインデックスにある ListViewGroup を削除します。Removes the ListViewGroup at the specified index within the collection.

ToString() ToString() ToString() ToString()

現在のオブジェクトを表す文字列を返します。Returns a string that represents the current object.

(Inherited from Object)

明示的なインターフェイスの実装

ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized ICollection.IsSynchronized

コレクションへのアクセスが同期されている (スレッド セーフである) かどうかを示す値を取得します。Gets a value indicating whether access to the collection is synchronized (thread safe).

ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot ICollection.SyncRoot

コレクションへのアクセスを同期するために使用できるオブジェクトを取得します。Gets an object that can be used to synchronize access to the collection.

IList.Add(Object) IList.Add(Object) IList.Add(Object) IList.Add(Object)

新しい ListViewGroupListViewGroupCollection に追加します。Adds a new ListViewGroup to the ListViewGroupCollection.

IList.Contains(Object) IList.Contains(Object) IList.Contains(Object) IList.Contains(Object)

指定した値がコレクション内にあるかどうかを判断します。Determines whether the specified value is located in the collection.

IList.IndexOf(Object) IList.IndexOf(Object) IList.IndexOf(Object) IList.IndexOf(Object)

指定した値のコレクション内のインデックスを返します。Returns the index within the collection of the specified value.

IList.Insert(Int32, Object) IList.Insert(Int32, Object) IList.Insert(Int32, Object) IList.Insert(Int32, Object)

ListViewGroupListViewGroupCollection に挿入します。Inserts a ListViewGroup into the ListViewGroupCollection.

IList.IsFixedSize IList.IsFixedSize IList.IsFixedSize IList.IsFixedSize

コレクションが固定サイズかどうかを示す値を取得します。Gets a value indicating whether the collection has a fixed size.

IList.IsReadOnly IList.IsReadOnly IList.IsReadOnly IList.IsReadOnly

コレクションが読み取り専用かどうかを示す値を取得します。Gets a value indicating whether the collection is read-only.

IList.Item[Int32] IList.Item[Int32] IList.Item[Int32] IList.Item[Int32]

コレクション内の指定したインデックスにある ListViewGroup を取得または設定します。Gets or sets the ListViewGroup at the specified index within the collection.

IList.Remove(Object) IList.Remove(Object) IList.Remove(Object) IList.Remove(Object)

ListViewGroupListViewGroupCollection から削除します。Removes the ListViewGroup from the ListViewGroupCollection.

Extension Methods

Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable) Cast<TResult>(IEnumerable)

IEnumerable の要素を、指定した型にキャストします。Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable) OfType<TResult>(IEnumerable)

指定された型に基づいて IEnumerable の要素をフィルター処理します。Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable) AsParallel(IEnumerable)

クエリの並列化を有効にします。Enables parallelization of a query.

AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable) AsQueryable(IEnumerable)

IEnumerableIQueryable に変換します。Converts an IEnumerable to an IQueryable.

適用対象

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