ListView.Columns Propriedade

public:
 property System::Windows::Forms::ListView::ColumnHeaderCollection ^ Columns { System::Windows::Forms::ListView::ColumnHeaderCollection ^ get(); };

public System.Windows.Forms.ListView.ColumnHeaderCollection Columns { get; }

member this.Columns : System.Windows.Forms.ListView.ColumnHeaderCollection

Public ReadOnly Property Columns As ListView.ColumnHeaderCollection

Valor da propriedade

Um ListView.ColumnHeaderCollection que representa os cabeçalhos de coluna que aparecem quando a propriedade View é definida como Details.

Exemplos

O exemplo de código a seguir cria um ListView controle com três ListViewItem objetos especificados e três ListViewItem.ListViewSubItem objetos especificados para cada item. O exemplo também cria ColumnHeader objetos para exibir os subitems na exibição de detalhes. Dois ImageList objetos também são criados no exemplo de código para fornecer imagens para os ListViewItem objetos. Esses ImageList objetos são adicionados às LargeImageList propriedades e SmallImageList . O exemplo usa as propriedades a seguir na criação do ListView controle.

• View

• LabelEdit

• AllowColumnReorder

• CheckBoxes

• FullRowSelect

• GridLines

• Sorting

Este exemplo exige que você tenha adicionado o código a um Form e chame o método criado no exemplo do construtor ou de outro método no formulário. O exemplo também exige que as imagens chamadas MySmallImage1, MySmallImage2, MyLargeImage1e MyLargeImage2 estejam localizadas no diretório raiz da unidade C.

private:
   void CreateMyListView()
   {
      // Create a new ListView control.
      ListView^ listView1 = gcnew ListView;
      listView1->Bounds = Rectangle(Point(10,10),System::Drawing::Size( 300, 200 ));

      // Set the view to show details.
      listView1->View = View::Details;

      // Allow the user to edit item text.
      listView1->LabelEdit = true;

      // Allow the user to rearrange columns.
      listView1->AllowColumnReorder = true;

      // Display check boxes.
      listView1->CheckBoxes = true;

      // Select the item and subitems when selection is made.
      listView1->FullRowSelect = true;

      // Display grid lines.
      listView1->GridLines = true;

      // Sort the items in the list in ascending order.
      listView1->Sorting = SortOrder::Ascending;

      // Create three items and three sets of subitems for each item.
      ListViewItem^ item1 = gcnew ListViewItem( "item1",0 );

      // Place a check mark next to the item.
      item1->Checked = true;
      item1->SubItems->Add( "1" );
      item1->SubItems->Add( "2" );
      item1->SubItems->Add( "3" );
      ListViewItem^ item2 = gcnew ListViewItem( "item2",1 );
      item2->SubItems->Add( "4" );
      item2->SubItems->Add( "5" );
      item2->SubItems->Add( "6" );
      ListViewItem^ item3 = gcnew ListViewItem( "item3",0 );

      // Place a check mark next to the item.
      item3->Checked = true;
      item3->SubItems->Add( "7" );
      item3->SubItems->Add( "8" );
      item3->SubItems->Add( "9" );

      // Create columns for the items and subitems.
      // Width of -2 indicates auto-size.
      listView1->Columns->Add( "Item Column", -2, HorizontalAlignment::Left );
      listView1->Columns->Add( "Column 2", -2, HorizontalAlignment::Left );
      listView1->Columns->Add( "Column 3", -2, HorizontalAlignment::Left );
      listView1->Columns->Add( "Column 4", -2, HorizontalAlignment::Center );

      //Add the items to the ListView.
      array<ListViewItem^>^temp1 = {item1,item2,item3};
      listView1->Items->AddRange( temp1 );

      // Create two ImageList objects.
      ImageList^ imageListSmall = gcnew ImageList;
      ImageList^ imageListLarge = gcnew ImageList;

      // Initialize the ImageList objects with bitmaps.
      imageListSmall->Images->Add( Bitmap::FromFile( "C:\\MySmallImage1.bmp" ) );
      imageListSmall->Images->Add( Bitmap::FromFile( "C:\\MySmallImage2.bmp" ) );
      imageListLarge->Images->Add( Bitmap::FromFile( "C:\\MyLargeImage1.bmp" ) );
      imageListLarge->Images->Add( Bitmap::FromFile( "C:\\MyLargeImage2.bmp" ) );

      //Assign the ImageList objects to the ListView.
      listView1->LargeImageList = imageListLarge;
      listView1->SmallImageList = imageListSmall;
      
      // Add the ListView to the control collection.
      this->Controls->Add( listView1 );
   }

private void CreateMyListView()
{
    // Create a new ListView control.
    ListView listView1 = new ListView();
    listView1.Bounds = new Rectangle(new Point(10,10), new Size(300,200));

    // Set the view to show details.
    listView1.View = View.Details;
    // Allow the user to edit item text.
    listView1.LabelEdit = true;
    // Allow the user to rearrange columns.
    listView1.AllowColumnReorder = true;
    // Display check boxes.
    listView1.CheckBoxes = true;
    // Select the item and subitems when selection is made.
    listView1.FullRowSelect = true;
    // Display grid lines.
    listView1.GridLines = true;
    // Sort the items in the list in ascending order.
    listView1.Sorting = SortOrder.Ascending;
                
    // Create three items and three sets of subitems for each item.
    ListViewItem item1 = new ListViewItem("item1",0);
    // Place a check mark next to the item.
    item1.Checked = true;
    item1.SubItems.Add("1");
    item1.SubItems.Add("2");
    item1.SubItems.Add("3");
    ListViewItem item2 = new ListViewItem("item2",1);
    item2.SubItems.Add("4");
    item2.SubItems.Add("5");
    item2.SubItems.Add("6");
    ListViewItem item3 = new ListViewItem("item3",0);
    // Place a check mark next to the item.
    item3.Checked = true;
    item3.SubItems.Add("7");
    item3.SubItems.Add("8");
    item3.SubItems.Add("9");

    // Create columns for the items and subitems.
    // Width of -2 indicates auto-size.
    listView1.Columns.Add("Item Column", -2, HorizontalAlignment.Left);
    listView1.Columns.Add("Column 2", -2, HorizontalAlignment.Left);
    listView1.Columns.Add("Column 3", -2, HorizontalAlignment.Left);
    listView1.Columns.Add("Column 4", -2, HorizontalAlignment.Center);

    //Add the items to the ListView.
    listView1.Items.AddRange(new ListViewItem[]{item1,item2,item3});

    // Create two ImageList objects.
    ImageList imageListSmall = new ImageList();
    ImageList imageListLarge = new ImageList();

    // Initialize the ImageList objects with bitmaps.
    imageListSmall.Images.Add(Bitmap.FromFile("C:\\MySmallImage1.bmp"));
    imageListSmall.Images.Add(Bitmap.FromFile("C:\\MySmallImage2.bmp"));
    imageListLarge.Images.Add(Bitmap.FromFile("C:\\MyLargeImage1.bmp"));
    imageListLarge.Images.Add(Bitmap.FromFile("C:\\MyLargeImage2.bmp"));

    //Assign the ImageList objects to the ListView.
    listView1.LargeImageList = imageListLarge;
    listView1.SmallImageList = imageListSmall;

    // Add the ListView to the control collection.
    this.Controls.Add(listView1);
}

Private Sub CreateMyListView()
    ' Create a new ListView control.
    Dim listView1 As New ListView()
    listView1.Bounds = New Rectangle(New Point(10, 10), New Size(300, 200))

    ' Set the view to show details.
    listView1.View = View.Details
    ' Allow the user to edit item text.
    listView1.LabelEdit = True
    ' Allow the user to rearrange columns.
    listView1.AllowColumnReorder = True
    ' Display check boxes.
    listView1.CheckBoxes = True
    ' Select the item and subitems when selection is made.
    listView1.FullRowSelect = True
    ' Display grid lines.
    listView1.GridLines = True
    ' Sort the items in the list in ascending order.
    listView1.Sorting = SortOrder.Ascending

    ' Create three items and three sets of subitems for each item.
    Dim item1 As New ListViewItem("item1", 0)
    ' Place a check mark next to the item.
    item1.Checked = True
    item1.SubItems.Add("1")
    item1.SubItems.Add("2")
    item1.SubItems.Add("3")
    Dim item2 As New ListViewItem("item2", 1)
    item2.SubItems.Add("4")
    item2.SubItems.Add("5")
    item2.SubItems.Add("6")
    Dim item3 As New ListViewItem("item3", 0)
    ' Place a check mark next to the item.
    item3.Checked = True
    item3.SubItems.Add("7")
    item3.SubItems.Add("8")
    item3.SubItems.Add("9")

    ' Create columns for the items and subitems.
    ' Width of -2 indicates auto-size.
    listView1.Columns.Add("Item Column", -2, HorizontalAlignment.Left)
    listView1.Columns.Add("Column 2", -2, HorizontalAlignment.Left)
    listView1.Columns.Add("Column 3", -2, HorizontalAlignment.Left)
    listView1.Columns.Add("Column 4", -2, HorizontalAlignment.Center)

    'Add the items to the ListView.
    listView1.Items.AddRange(New ListViewItem() {item1, item2, item3})

    ' Create two ImageList objects.
    Dim imageListSmall As New ImageList()
    Dim imageListLarge As New ImageList()

    ' Initialize the ImageList objects with bitmaps.
    imageListSmall.Images.Add(Bitmap.FromFile("C:\MySmallImage1.bmp"))
    imageListSmall.Images.Add(Bitmap.FromFile("C:\MySmallImage2.bmp"))
    imageListLarge.Images.Add(Bitmap.FromFile("C:\MyLargeImage1.bmp"))
    imageListLarge.Images.Add(Bitmap.FromFile("C:\MyLargeImage2.bmp"))

    'Assign the ImageList objects to the ListView.
    listView1.LargeImageList = imageListLarge
    listView1.SmallImageList = imageListSmall

    ' Add the ListView to the control collection.
    Me.Controls.Add(listView1)
End Sub

Comentários

A Columns propriedade retorna uma coleção que contém os ColumnHeader objetos exibidos no ListView controle . ColumnHeader os objetos definem as colunas exibidas no ListView controle quando a View propriedade é definida Detailscomo . Cada coluna é usada para exibir informações de subitem para cada item no ListView. Para obter mais informações sobre como manipular os itens na coleção, consulte ListView.ColumnHeaderCollection.

Aplica-se a

Confira também

• ListView.ColumnHeaderCollection
• ColumnHeader