CheckedListBox.SetItemChecked(Int32, Boolean) Metode

Definisi

Ruang nama:

System.Windows.Forms

Rakitan:

System.Windows.Forms.dll

Sumber:

CheckedListBox.cs

CheckState Mengatur untuk item pada indeks yang ditentukan ke Checked.

public:
 void SetItemChecked(int index, bool value);

public void SetItemChecked(int index, bool value);

member this.SetItemChecked : int * bool -> unit

Public Sub SetItemChecked (index As Integer, value As Boolean)

Parameter

index

Int32

Indeks item yang akan diatur status pemeriksaannya.

value

Boolean

true untuk mengatur item sebagai dicentang; jika tidak, false.

Pengecualian

ArgumentException

Indeks yang ditentukan kurang dari nol.

-atau-

Indeks lebih besar dari jumlah item dalam daftar.

Contoh

Contoh berikut menghitung item dalam CheckedListBox dan memeriksa setiap item lain dalam daftar. Contoh menunjukkan menggunakan SetItemCheckState metode dan SetItemChecked untuk mengatur status pemeriksaan item. Untuk setiap item lain yang akan diperiksa, SetItemCheckState dipanggil untuk mengatur CheckState ke Indeterminate, sementara SetItemChecked dipanggil pada item lain untuk mengatur status dicentang ke Checked.

Contohnya juga menunjukkan penggunaan Items properti untuk mendapatkan CheckedListBox.ObjectCollection untuk mendapatkan Count item.

void CheckEveryOther_Click( Object^ /*sender*/, System::EventArgs^ /*e*/ )
{
   
   // Cycle through every item and check every other.
   // Set flag to true to know when this code is being executed. Used in the ItemCheck
   // event handler.
   insideCheckEveryOther = true;
   for ( int i = 0; i < checkedListBox1->Items->Count; i++ )
   {
      
      // For every other item in the list, set as checked.
      if ( (i % 2) == 0 )
      {
         
         // But for each other item that is to be checked, set as being in an
         // indeterminate checked state.
         if ( (i % 4) == 0 )
                     checkedListBox1->SetItemCheckState( i, CheckState::Indeterminate );
         else
                     checkedListBox1->SetItemChecked( i, true );
      }

   }
   insideCheckEveryOther = false;
}

private void CheckEveryOther_Click(object sender, System.EventArgs e) {
    // Cycle through every item and check every other.

    // Set flag to true to know when this code is being executed. Used in the ItemCheck
    // event handler.
    insideCheckEveryOther = true;

    for (int i = 0; i < checkedListBox1.Items.Count; i++) {
        // For every other item in the list, set as checked.
        if ((i % 2) == 0) {
            // But for each other item that is to be checked, set as being in an
            // indeterminate checked state.
            if ((i % 4) == 0)
                checkedListBox1.SetItemCheckState(i, CheckState.Indeterminate);
            else
                checkedListBox1.SetItemChecked(i, true);
        }
    }

    insideCheckEveryOther = false;
}

Private Sub CheckEveryOther_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckEveryOther.Click
    ' Cycle through every item and check every other.
    Dim i As Integer

    ' Set flag to true to know when this code is being executed. Used in the ItemCheck
    ' event handler.
    insideCheckEveryOther = True

    For i = 0 To CheckedListBox1.Items.Count - 1
        ' For every other item in the list, set as checked.

        If ((i Mod 2) = 0) Then
            ' But for each other item that is to be checked, set as being in an
            ' indeterminate checked state.

            If ((i Mod 4) = 0) Then
                CheckedListBox1.SetItemCheckState(i, CheckState.Indeterminate)
            Else
                CheckedListBox1.SetItemChecked(i, True)
            End If
        End If
    Next

    insideCheckEveryOther = False

End Sub

Keterangan

Ketika nilai true diteruskan, metode ini mengatur nilai ke CheckStateChecked. Nilai false set CheckState ke Unchecked.