Controls You Can Use on Web Forms   ASP.NET Standard Controls   CheckBox and CheckBoxList Controls

You can programmatically read or set the value of a CheckBox Web server control.

NOTE: If you are working with a CheckBoxList control, the procedure for getting and setting the value of a check box is different. For details, see Determining the Selection in a List Control and Setting the Selection in a List Control.

To get or set CheckBox Web server control selection, get or set the CheckBox control’s Checked property. A value of true means the check box is selected.

In the following example, if the check box chkSavePassword is not selected, the check box chkSaveEncrypted is automatically cleared as well, and vice-versa.

if ( chkSavePass.Checked ) {
   chkSaveEncrypted.Checked = true;
else
   chkSaveEncrypted.Checked = false;
}

If chkSavePass.Checked Then
   chkSaveEncrypted.Checked = true;
Else
   chkSaveEncrypted.Checked = false;
End If

checkbox2.aspx Run Sample | View Source

Responding to User Selection in a CheckBox Control