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ListView.CheckBoxes Propriedade

Obtém ou define um valor indicando se uma Marcar caixa aparece Avançar a cada item no Controlarar.

Namespace:  System.Windows.Forms
Assembly:  System.Windows.Forms (em System.Windows.Forms. dll)

public bool CheckBoxes { get; set; }

Valor da propriedade

Tipo: System.Boolean
true if a check box appears next to each item in the ListView control; otherwise, false. O padrão é false.

The CheckBoxes property allows you to display a check box next to each item in the list.This enables your application to display a list of items (and subitems if the View property is set to View.Details) that the user can select by clicking the check box.The CheckBoxes property offers a way to select multiple items in the ListView control without using the CTRL key.Depending on seu aplicativo, usando caixas Marcar para selecionar itens em vez do padrão Seleção Múltipla método pode ser mais fácil para o usuário.Even if the MultiSelect property of the ListView control is set to false, you can still display checkboxes and provide multiple selection capabilities to the user.Esse recurso pode ser útil se não desejar Múltiplo itens a ser selecionado ainda ainda desejar permitir que o usuário a escolher Múltiplo itens de lista para executar uma operação de seu aplicativo.

To determine when an item has been checked, create an event handler for the ItemCheck event.To get all the items that are checked in the ListView, use the CheckedItems property to access the ListView.CheckedIndexCollection for the control.To get the indexes of all items that are checked in the ListView, use the CheckedIndices property.

If an ImageList is specified in the StateImageList property, the images at index positions 0 and 1 in the ImageList are displayed instead of the check box.A imagem em posição do índice 0 é exibida em vez de UNMarcarEd Marcar caixa e a imagem em posição do índice 1 é exibida em vez do MarcarEd Marcar caixa.

ObservaçãoObservação:

When you set this property to true, the ItemCheck event occurs.

Check boxes are not displayed when the View property is set to Tile.

The following code example creates a ListView control with three ListViewItem objects specified and three ListViewItem.ListViewSubItem objects specified for each item.The example also creates ColumnHeader objects to display the subitems in details view.Two ImageList objects are also created in the code example to provide images for the ListViewItem objects.These ImageList objects are added to the LargeImageList and SmallImageList properties.The example uses the following properties in creating the ListView control.

This example requires that you have added the code to a Form and call the method created in the example from the constructor or another method on the form.The example also requires that images named MySmallImage1, MySmallImage2, MyLargeImage1, and MyLargeImage2 are located in the root directory of drive C.

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

    // Set the view to show details.
    listView1.set_View(View.Details);

    // Allow the user to edit item text.
    listView1.set_LabelEdit(true);

    // Allow the user to rearrange columns.
    listView1.set_AllowColumnReorder(true);

    // Display check boxes.
    listView1.set_CheckBoxes(true);

    // Select the item and subitems when selection is made.
    listView1.set_FullRowSelect(true);

    // Display grid lines.
    listView1.set_GridLines(true);

    // Sort the items in the list in ascending order.
    listView1.set_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.set_Checked(true);

    item1.get_SubItems().Add("1");
    item1.get_SubItems().Add("2");
    item1.get_SubItems().Add("3");

    ListViewItem item2 = new ListViewItem("item2", 1);
    item2.get_SubItems().Add("4");
    item2.get_SubItems().Add("5");
    item2.get_SubItems().Add("6");

    ListViewItem item3 = new ListViewItem("item3", 0);

    // Place a check mark next to the item.
    item3.set_Checked(true);

    item3.get_SubItems().Add("7");
    item3.get_SubItems().Add("8");
    item3.get_SubItems().Add("9");

    // Create columns for the items and subitems.
    listView1.get_Columns().Add("Item Column", -2, 
        HorizontalAlignment.Left);
    listView1.get_Columns().Add("Column 2", -2, HorizontalAlignment.Left);
    listView1.get_Columns().Add("Column 3", -2, HorizontalAlignment.Left);
    listView1.get_Columns().Add("Column 4", -2, HorizontalAlignment.Center);

    //Add the items to the ListView.
    listView1.get_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.get_Images().Add(Bitmap.FromFile(
        "C:\\MySmallImage1.bmp"));
    imageListSmall.get_Images().Add(Bitmap.FromFile(
        "C:\\MySmallImage2.bmp"));
    imageListLarge.get_Images().Add(Bitmap.FromFile(
        "C:\\MyLargeImage1.bmp"));
    imageListLarge.get_Images().Add(Bitmap.FromFile(
        "C:\\MyLargeImage2.bmp"));

    //Assign the ImageList objects to the ListView.
    listView1.set_LargeImageList(imageListLarge);
    listView1.set_SmallImageList(imageListSmall);

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


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