private void btnUserDel_Click(object sender, EventArgs e)
        {
            if (this.gdvInfo.SelectedRowsCount <= 0)
            {
                MessageBox.Show("请选择要删除的用户!");
                return;
            }

            int[] indexArr = this.gdvInfo.GetSelectedRows();
            bool  Result   = false;

            if (MessageBox.Show("确定删除被选中的信息吗?", "温馨提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.OK)
            {
                for (int i = 0; i < indexArr.Count(); i++)
                {
                    string  paramUserName = this.gdvInfo.GetDataRow(indexArr[i])["username"].ToString();//获取到需要删除的行的主健
                    BUUsers myBUUsers     = new BUUsers();
                    Result = myBUUsers.DeleteUser(paramUserName);;
                }
            }
            if (Result)
            {
                MessageBox.Show("删除成功");
                btnSearchUser_Click(sender, e);
            }
            else
            {
                MessageBox.Show("删除失败");;
            }
        }