Control.HasChildren Property

Definition

Gets a value indicating whether the control contains one or more child controls.

C#
[System.ComponentModel.Browsable(false)]
public bool HasChildren { get; }

Property Value

true if the control contains one or more child controls; otherwise, false.

Attributes

Examples

The following code example sets the BackColor and ForeColor of the controls to the default system colors. The code recursively calls itself if the control has any child controls. This code example requires that you have a Form with at least one child control; however, a child container control, like a Panel or GroupBox, with its own child control(s) would better demonstrate the recursion.

C#
// Reset all the controls to the user's default Control color. 
private void ResetAllControlsBackColor(Control control)
{
   control.BackColor = SystemColors.Control;
   control.ForeColor = SystemColors.ControlText;
   if(control.HasChildren)
   {
      // Recursively call this method for each child control.
      foreach(Control childControl in control.Controls)
      {
         ResetAllControlsBackColor(childControl);
      }
   }
}

Remarks

If the Controls collection has a Count greater than zero, the HasChildren property will return true. Accessing the HasChildren property does not force the creation of a Control.ControlCollection if the control has no children, so referencing this property can provide a performance benefit when walking a tree of controls.

Applies to

Product Versions
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
Windows Desktop 3.0, 3.1, 5, 6, 7, 8, 9

See also