一、dataGridView

1.右鍵出快捷選單

            if (e.Button == MouseButtons.Right)
            {
                if (e.RowIndex >= 0)
                {
                    //若行已是選中狀態就不再進行設定
                    if (DGVInfo.Rows[e.RowIndex].Selected == false)
                    {
                        DGVInfo.ClearSelection();
                        DGVInfo.Rows[e.RowIndex].Selected = true;
                    }
                    //只選中一行時設定活動單元格
                    if (DGVInfo.SelectedRows.Count == 1)
                    {
                        DGVInfo.CurrentCell = DGVInfo.Rows[e.RowIndex].Cells[e.ColumnIndex];
                    }
                    //彈出操作選單
                    contextMenuStrip2.Show(MousePosition.X, MousePosition.Y);
                }
            }
 

2.datagridview怎麼操作完之後重新整理

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

二、介面

1.messbox

選擇是否執行對話方塊
 if (MessageBox.Show("您確定要退出系統嗎？", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes)
            {}

2.點選一個按鈕執行另一個按鈕

btnOffLine_Click(sender,e);

3.清空Text文字

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

4.PasswordChar 為0

txt_Password.PasswordChar = '\0';

5. 控制元件隨窗體變大

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