XenAdmin.Wizards.PatchingWizard.PatchingWizard_SelectServers.EnableNext C# (CSharp) Method

        public override bool EnableNext()
        {
            bool clearAllButtonEnabled = false;
            bool selectAllButtonEnabled = false;

            foreach (PatchingHostsDataGridViewRow row in dataGridViewHosts.Rows)
            {
                if ((row.Tag is Host && !row.HasPool) || row.Tag is Pool)
                {
                    int val = (int)row.Cells[POOL_CHECKBOX_COL].Value;
                    if (val > UNCHECKED)
                    {
                        clearAllButtonEnabled = true;
                        if (val == INDETERMINATE)
                            selectAllButtonEnabled = true;
                    }
                    else
                        selectAllButtonEnabled = true;
                }
            }

            buttonClearAll.Enabled = clearAllButtonEnabled;
            buttonSelectAll.Enabled = selectAllButtonEnabled;
            return clearAllButtonEnabled;
        }