C# return、continue、break

return 终止当前进程 可用循环判断，验证，等功能

 if (ew == v)

            {

                PublicControlLib.Class.PublicProperties.ShowSuccess(this, "请检查后提交！", );

                return;

            }

continue  终止本次循环  进行下一次循环   用作在循环中进行筛选数据

   for(int a = ;a <Fg1Count;a++)

            {

                if (FG1.Rows[a].DefaultCellStyle.BackColor == Color.Red)

                   continue;

                if (FG1.Rows[a].Visible == false)

                   continue;

                   DataRow Crow = DTmain.NewRow();

                   Crow["唯一码"] =  FG1.Rows[a].Cells[].Value.ToString();

                   Crow["价格"] =FG1.Rows[a].Cells[].Value;

                   DTmain.Rows.Add(Crow);

            }

break 跳出当前的循环、继续进行外围的循环

 for (int a = ; a < dataGridViewX1.Rows.Count; a++)

            {

                for (int b = ; b < dataGridViewX1.Columns.Count; b++)

                {

                    if (dataGridViewX1.Rows[a].Cells[b].Value == "")

                    {

                        break;

                    }

                }

            }