CheckedListBox.Items 屬性

定義

命名空間:

System.Windows.Forms

組件:

System.Windows.Forms.dll

取得這個 CheckedListBox 中的項目集合。

public:
 property System::Windows::Forms::CheckedListBox::ObjectCollection ^ Items { System::Windows::Forms::CheckedListBox::ObjectCollection ^ get(); };

public System.Windows.Forms.CheckedListBox.ObjectCollection Items { get; }

member this.Items : System.Windows.Forms.CheckedListBox.ObjectCollection

Public ReadOnly Property Items As CheckedListBox.ObjectCollection

屬性值

CheckedListBox.ObjectCollection

表示 CheckedListBox.ObjectCollection 中項目的 CheckedListBox 集合。

範例

下列範例會列舉 中的 CheckedListBox.CheckedIndexCollection 已核取專案，以查看專案所在的檢查狀態。 此範例會 Items 使用 屬性來取得 CheckedListBox.ObjectCollection ，以使用 ListBox.ObjectCollection.IndexOf 方法擷取專案的索引。 此範例也會示範如何使用 CheckedIndices 屬性來取得 CheckedListBox.CheckedIndexCollection ，以及 CheckedItems 取得 CheckedListBox.CheckedItemCollection 的屬性。

第一個迴圈會 GetItemCheckState 使用 方法來取得 CheckState 每個已檢查項目的 ，並指定專案的索引。 第二個迴圈也會使用 GetItemCheckState ，但會使用 ListBox.ObjectCollection.IndexOf 方法來擷取專案的索引。

void WhatIsChecked_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   
   // Display in a message box all the items that are checked.
   // First show the index and check state of all selected items.
   IEnumerator^ myEnum1 = checkedListBox1->CheckedIndices->GetEnumerator();
   while ( myEnum1->MoveNext() )
   {
      Int32 indexChecked =  *safe_cast<Int32^>(myEnum1->Current);
      
      // The indexChecked variable contains the index of the item.
      MessageBox::Show( String::Concat( "Index#: ", indexChecked, ", is checked. Checked state is: ", checkedListBox1->GetItemCheckState( indexChecked ), "." ) );
   }

   
   // Next show the Object* title and check state for each item selected.
   IEnumerator^ myEnum2 = checkedListBox1->CheckedItems->GetEnumerator();
   while ( myEnum2->MoveNext() )
   {
      Object^ itemChecked = safe_cast<Object^>(myEnum2->Current);
      
      // Use the IndexOf method to get the index of an item.
      MessageBox::Show( String::Concat( "Item with title: \"", itemChecked, "\", is checked. Checked state is: ", checkedListBox1->GetItemCheckState( checkedListBox1->Items->IndexOf( itemChecked ) ), "." ) );
   }
}

private void WhatIsChecked_Click(object sender, System.EventArgs e) {
    // Display in a message box all the items that are checked.

    // First show the index and check state of all selected items.
    foreach(int indexChecked in checkedListBox1.CheckedIndices) {
        // The indexChecked variable contains the index of the item.
        MessageBox.Show("Index#: " + indexChecked.ToString() + ", is checked. Checked state is:" +
                        checkedListBox1.GetItemCheckState(indexChecked).ToString() + ".");
    }

    // Next show the object title and check state for each item selected.
    foreach(object itemChecked in checkedListBox1.CheckedItems) {

        // Use the IndexOf method to get the index of an item.
        MessageBox.Show("Item with title: \"" + itemChecked.ToString() +
                        "\", is checked. Checked state is: " +
                        checkedListBox1.GetItemCheckState(checkedListBox1.Items.IndexOf(itemChecked)).ToString() + ".");
    }
}

Private Sub WhatIsChecked_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles WhatIsChecked.Click
    ' Display in a message box all the items that are checked.
    Dim indexChecked As Integer
    Dim itemChecked As Object
    Const quote As String = """"

    ' First show the index and check state of all selected items.
    For Each indexChecked In CheckedListBox1.CheckedIndices
        ' The indexChecked variable contains the index of the item.
        MessageBox.Show("Index#: " + indexChecked.ToString() + ", is checked. Checked state is:" + _
                        CheckedListBox1.GetItemCheckState(indexChecked).ToString() + ".")
    Next

    ' Next show the object title and check state for each item selected.
    For Each itemChecked In CheckedListBox1.CheckedItems

        ' Use the IndexOf method to get the index of an item.
        MessageBox.Show("Item with title: " + quote + itemChecked.ToString() + quote + _
                        ", is checked. Checked state is: " + _
                        CheckedListBox1.GetItemCheckState(CheckedListBox1.Items.IndexOf(itemChecked)).ToString() + ".")
    Next

End Sub

備註

屬性 Items 可讓您取得目前儲存在 控制項中的專案清單的 CheckedListBox 參考。 使用此參考，您可以新增專案、移除專案，以及取得集合中專案的計數。 如需可使用專案集合執行之工作的詳細資訊，請參閱 CheckedListBox.ObjectCollection 類別參考主題。

另請參閱

• CheckedItems
• CheckedIndices