CheckedListBox.ObjectCollection Klass

Definition

public: ref class CheckedListBox::ObjectCollection : System::Windows::Forms::ListBox::ObjectCollection

public class CheckedListBox.ObjectCollection : System.Windows.Forms.ListBox.ObjectCollection

type CheckedListBox.ObjectCollection = class
    inherit ListBox.ObjectCollection

Public Class CheckedListBox.ObjectCollection
Inherits ListBox.ObjectCollection

Arv

Object

ListBox.ObjectCollection

CheckedListBox.ObjectCollection

Exempel

I följande exempel räknas objekten CheckedListBox i och alla andra objekt i listan kontrolleras. Exemplet visar hur du använder Items egenskapen för att hämta CheckedListBox.ObjectCollection objekten Count .

Exemplet visar också hur du använder SetItemCheckState metoderna och SetItemChecked för att ange kontrolltillståndet för ett objekt. För alla andra objekt som ska kontrolleras SetItemCheckState anropas för att ange CheckState till Indeterminate, medan SetItemChecked anropas på det andra objektet för att ange det kontrollerade tillståndet till Checked.

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

Kommentarer

Samlingen nås från den överordnade kontrollen, CheckedListBox, av Items egenskapen . Om du vill skapa en samling objekt som ska visas i CheckedListBox kontrollen kan du lägga till eller ta bort objekten individuellt med hjälp Add av metoderna och Remove .