private void RemoveBtn_Click(object sender, EventArgs e) { if (groupUserList.SelectedItems.Count == 0) { MessageBox.Show("至少选择一个用户!", "文档管理系统", MessageBoxButtons.OK, MessageBoxIcon.Error); return; } try { foreach (ListViewItem lvi in groupUserList.SelectedItems) { CUserEntity user = (CUserEntity)lvi.Tag; _currentUser.RemoveUserFromGroup(_groupId, user.Usr_Id); } } catch (Exception ex) { MessageBox.Show("修改用户组失败:" + ex.Message, "文档管理系统", MessageBoxButtons.OK, MessageBoxIcon.Error); } FillUserLists(); }