private void btn_down_Click(object sender, EventArgs e) { decimal num = 0; try { num = Convert.ToDecimal(textBox_num.Text); if (num < 0) { MessageBox.Show("输入数值必须为非负数!"); return; } } catch (Exception) { MessageBox.Show("输入数量格式有误!"); return; } if (!Check(num, 2)) { return; } DialogResult re = MessageBox.Show("确定减少所有合流缓存上限为:" + textBox_num.Text + " ?", "数据修改", MessageBoxButtons.OKCancel, MessageBoxIcon.Question); if (re == DialogResult.OK) { UnionCacheServer.datepldown(num); dataGridView1.DataSource = UnionCacheServer.GetAllData(); } }