CheckedListBox.CheckedItems Properti

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Kumpulan item yang dicentang dalam ini CheckedListBox.

public:
 property System::Windows::Forms::CheckedListBox::CheckedItemCollection ^ CheckedItems { System::Windows::Forms::CheckedListBox::CheckedItemCollection ^ get(); };

[System.ComponentModel.Browsable(false)]
public System.Windows.Forms.CheckedListBox.CheckedItemCollection CheckedItems { get; }

[<System.ComponentModel.Browsable(false)>]
member this.CheckedItems : System.Windows.Forms.CheckedListBox.CheckedItemCollection

Public ReadOnly Property CheckedItems As CheckedListBox.CheckedItemCollection

Nilai Properti

CheckedListBox.CheckedItemCollection

Koleksi CheckedListBox.CheckedItemCollection untuk CheckedListBox.

Atribut

BrowsableAttribute

Contoh

Contoh berikut menghitung item yang dicentang di CheckedListBox.CheckedIndexCollection untuk melihat status pemeriksaan item. Contoh menunjukkan menggunakan CheckedIndices properti untuk mendapatkan CheckedListBox.CheckedIndexCollection, dan CheckedItems properti untuk mendapatkan CheckedListBox.CheckedItemCollection.

Perulangan pertama menggunakan GetItemCheckState metode untuk mendapatkan CheckState dari setiap item yang dicentang, mengingat indeks item. Perulangan kedua juga menggunakan GetItemCheckState, tetapi menggunakan ListBox.ObjectCollection.IndexOf metode untuk mengambil indeks untuk item.

Untuk menjalankan contoh ini, lakukan langkah-langkah berikut:

1. Buat aplikasi Formulir Windows baru.

2. CheckedListBox Tambahkan dan Button ke formulir.

3. Beri nama tombol WhatIsChecked, tambahkan handler untuk peristiwanya Click , dan salin dalam kode dari isi handler berikut.

4. Tambahkan beberapa item ke CheckedListBox.

5. Jalankan contoh dan centang beberapa kotak centang dalam kotak daftar.

6. Klik tombol.

   Anda akan melihat serangkaian kotak pesan yang menunjukkan item mana yang dicentang.

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

Keterangan

Koleksi adalah subset objek dalam Items koleksi, hanya mewakili item yang System.Windows.Forms.CheckState atau CheckedIndeterminate. Indeks dalam koleksi ini dalam urutan naik.

Lihat juga

• CheckedListBox.CheckedItemCollection