C# 机房合作代码块

            if (e.Button == MouseButtons.Right)
            {
                if (e.RowIndex >= 0)
                {
                    //若行已是选中状态就不再进行设置
                    if (DGVInfo.Rows[e.RowIndex].Selected == false)
                    {
                        DGVInfo.ClearSelection();
                        DGVInfo.Rows[e.RowIndex].Selected = true;
                    }
                    //只选中一行时设置活动单元格
                    if (DGVInfo.SelectedRows.Count == 1)
                    {
                        DGVInfo.CurrentCell = DGVInfo.Rows[e.RowIndex].Cells[e.ColumnIndex];
                    }
                    //弹出操作菜单
                    contextMenuStrip2.Show(MousePosition.X, MousePosition.Y);
                }
            }

DGVInfo.DataSource = dt;
            DGVInfo.Refresh();

选择是否执行对话框
 if (MessageBox.Show("您确定要退出系统吗？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {}

btnOffLine_Click(sender,e);

    foreach (Control Ctrol in this.Controls)
                {
                    if (Ctrol is TextBox)
                    {
                        Ctrol.Text = "";
                    }
                }

txt_Password.PasswordChar = '\0';

this.WindowState = FormWindowState.Maximized;           
            panel1.Width = this.Width;
            ```