StringBuilder用法举例

               StringBuilder sb = new StringBuilder();
                for (int i = 0; i < dataGridView1.Rows.Count; i++)
                {
                    if ((bool)dataGridView1.Rows[i].Cells["check"].EditedFormattedValue == true)
                    {
                        string id = dataGridView1.Rows[i].Cells["ID"].Value.ToString();
                        sb.Append(@"'" + id + @"',");
                    }
                }
                if (sb.Length >= 1)
                {
                    sb.Remove(sb.Length - 1, 1);

                    string lsbhstr = sb.ToString();

                }