private void btnOK_Click(object sender, EventArgs e) { DatabaseObjectType databaseObjectType = DatabaseObjectType.None; foreach (var item in this.chkDbObjectTypes.CheckedItems) { DatabaseObjectType type = (DatabaseObjectType)Enum.Parse(typeof(DatabaseObjectType), ManagerUtil.GetSingularString(item.ToString())); databaseObjectType = databaseObjectType | type; } if (databaseObjectType == DatabaseObjectType.None) { MessageBox.Show("Please select database object type."); return; } else { this.DatabaseObjectType = databaseObjectType; } this.DialogResult = DialogResult.OK; this.Close(); }