// Create the floating header
private void AddFloatingHeader(GridViewColumnHeader srcHeader)
{
GridViewColumnHeader header;
// #1426973: Because users may put subclassed header as the column header,
// we need to create the same type per source header as the floating one
// Get source header's type
Type headerType = (srcHeader != null ? srcHeader.GetType() : typeof(GridViewColumnHeader));
try
{
// Instantiate the same type for floating header
header = Activator.CreateInstance(headerType) as GridViewColumnHeader;
}
catch (MissingMethodException e)
{
throw new ArgumentException(SR.Get(SRID.ListView_MissingParameterlessConstructor, headerType), e);
}
Debug.Assert(header != null, "Cannot instantiate GridViewColumnHeader in AddFloatingHeader");
header.IsInternalGenerated = true;
header.SetValue(GridViewColumnHeader.RolePropertyKey, GridViewColumnHeaderRole.Floating);
header.Visibility = Visibility.Hidden;
InternalChildren.AddInternal(header);
_floatingHeader = header;
}
