ListViewItem.Checked 属性

获取或设置一个值，该值指示是否选中此项。

**命名空间:**System.Windows.Forms
**程序集:**System.Windows.Forms（在 system.windows.forms.dll 中）

语法

声明
Public Property Checked As Boolean
用法
Dim instance As ListViewItem
Dim value As Boolean

value = instance.Checked

instance.Checked = value

public bool Checked { get; set; }

public:
property bool Checked {
    bool get ();
    void set (bool value);
}

/** @property */
public boolean get_Checked ()

/** @property */
public void set_Checked (boolean value)

public function get Checked () : boolean

public function set Checked (value : boolean)

属性值

如果选中该项，则为 true；否则为 false。默认为 false。

备注

只有在包含该项的 ListView 控件的 CheckBoxes 属性设置为 true 时，此属性才有用。您可以使用此属性来确定该项在运行时是否已由用户选中或已通过代码选中。要确定在 ListView 控件中选中的所有项，您可以使用 CheckedItems 属性。要在选中某项后执行操作，您可以为 ListView 控件的 ItemCheck 属性创建事件处理程序。

示例

下面的代码示例创建一个 ListView 控件，其中带有三个指定的 ListViewItem 对象，而这三个对象中的每一项又带有三个指定的 ListViewItem.ListViewSubItem 对象。该示例还创建 ColumnHeader 对象以便在详细信息视图中显示子项。在代码示例中还创建两个 ImageList 对象，以便为 ListViewItem 对象提供图像。这些 ImageList 对象被添加到 LargeImageList 和 SmallImageList 属性中。在创建 ListView 控件的过程中，该示例使用下列属性：

• View

• LabelEdit

• AllowColumnReorder

• CheckBoxes

• FullRowSelect

• GridLines

• Sorting

您需要向 Form 添加代码，并从构造函数或窗体上的另一个方法来调用在该示例中创建的方法。该示例要求驱动器 C 的根目录下有名为 MySmallImage1、MySmallImage2、MyLargeImage1 和 MyLargeImage2 的图像。

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.
    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 'CreateMyListView

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 = 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.
      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.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

平台

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

.NET Framework 并不是对每个平台的所有版本都提供支持。有关受支持版本的列表，请参见系统要求。

版本信息

.NET Framework

受以下版本支持：2.0、1.1、1.0

.NET Compact Framework

受以下版本支持：2.0、1.0

请参见

参考

ListViewItem 类
ListViewItem 成员
System.Windows.Forms 命名空间
ListView.CheckBoxes 属性
ListView.ItemCheck 事件
ListView.CheckedItems 属性