共用方式為


ListViewItem.GetSubItemAt(Int32, Int32) 方法

定義

傳回位於指定座標之 ListViewItem 的子項目。

public:
 System::Windows::Forms::ListViewItem::ListViewSubItem ^ GetSubItemAt(int x, int y);
public System.Windows.Forms.ListViewItem.ListViewSubItem GetSubItemAt (int x, int y);
public System.Windows.Forms.ListViewItem.ListViewSubItem? GetSubItemAt (int x, int y);
member this.GetSubItemAt : int * int -> System.Windows.Forms.ListViewItem.ListViewSubItem
Public Function GetSubItemAt (x As Integer, y As Integer) As ListViewItem.ListViewSubItem

參數

x
Int32

x 座標。

y
Int32

y 座標。

傳回

位於指定之 X 和 Y 座標的 ListViewItem.ListViewSubItem

範例

下列程式碼範例會示範如何使用 GetSubItemAt 方法。 若要執行此程式碼,請將它貼到 Windows Form 中,然後從表單的建構函式或 Load 事件處理方法呼叫 InitializeListView1

private ListView listView1;

private void  InitializeListView1(){
    listView1 = new ListView();
    
    // Set the view to details to show subitems.
    listView1.View = View.Details;
   
    // Add some columns and set the width.
    listView1.Columns.Add("Name");
    listView1.Columns.Add("Number");
    listView1.Columns.Add("Description");
    listView1.Width = 175;

    // Create some items and subitems; add the to the ListView.
    ListViewItem item1 = new ListViewItem("Widget");
    item1.SubItems.Add(new ListViewItem.ListViewSubItem(item1, "14"));
    item1.SubItems.Add(new ListViewItem.ListViewSubItem(item1, 
        "A description of Widget"));
    ListViewItem item2 = new ListViewItem("Bracket");
    item2.SubItems.Add(new ListViewItem.ListViewSubItem(item2, "8"));
    listView1.Items.Add(item1);
    listView1.Items.Add(item2);
    
    // Add the ListView to the form.
    this.Controls.Add(listView1);
    listView1.MouseDown += new MouseEventHandler(listView1_MouseDown);
}

void listView1_MouseDown(object sender, MouseEventArgs e)
{
    // Get the item at the mouse pointer.
    ListViewHitTestInfo info = listView1.HitTest(e.X, e.Y);

    ListViewItem.ListViewSubItem subItem = null;
    
    // Get the subitem 120 pixels to the right.
    if (info != null)
        if (info.Item != null)
            subItem = info.Item.GetSubItemAt(e.X + 120, e.Y);
    
    // Show the text of the subitem, if found.
    if (subItem != null)
        MessageBox.Show(subItem.Text);
}
Private WithEvents listView1 As ListView

Private Sub InitializeListView1()
    listView1 = New ListView()

    ' Set the view to details to show subitems.
    listView1.View = View.Details

    ' Add some columns and set the width.
    listView1.Columns.Add("Name")
    listView1.Columns.Add("Number")
    listView1.Columns.Add("Description")
    listView1.Width = 175

    ' Create some items and subitems; add the to the ListView.
    Dim item1 As New ListViewItem("Widget")
    item1.SubItems.Add(New ListViewItem.ListViewSubItem(item1, "14"))
    item1.SubItems.Add(New ListViewItem.ListViewSubItem(item1, "A description of Widget"))
    Dim item2 As New ListViewItem("Bracket")
    item2.SubItems.Add(New ListViewItem.ListViewSubItem(item2, "8"))
    listView1.Items.Add(item1)
    listView1.Items.Add(item2)

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

Private Sub listView1_MouseDown(ByVal sender As Object, ByVal e As MouseEventArgs)


    ' Get the item at the mouse pointer.
    Dim info As ListViewHitTestInfo = listView1.HitTest(e.X, e.Y)

    Dim subItem As ListViewItem.ListViewSubItem = Nothing

    ' Get the subitem 120 pixels to the right.
    If (info IsNot Nothing) Then
        If (info.Item IsNot Nothing) Then
            subItem = info.Item.GetSubItemAt(e.X + 120, e.Y)
        End If
    End If ' Show the text of the subitem, if found.
    If (subItem IsNot Nothing) Then
        MessageBox.Show(subItem.Text)
    End If
End Sub

備註

如果 ListView 不在檢視中 Details ,或沒有 ListViewItem.ListViewSubItem 位於指定點的 ,則 GetSubItemAt 方法會傳回 null

適用於