Question

首先-我知道据此有一些帖子，但我似乎不明白“导师制”

基本上，我想做的是从MySQL数据库中将字符串中的数据提供给Checkedlistbox

ListBox已准备就绪，包含所有可检查的值，现在我只想让字符串告诉它应该检查哪些项目。

我的字符串/数组..真的不知道正确的定义...（示例）如下：“ B，BE，C1E，”（驾驶执照类型）

我真的想分享我在这个问题上的最新成果，如果我真的第十次放弃我的想法的话，那么我真的很困惑。

我会强烈推荐所有提示，指出我现在迷失方向的方向

编辑：哦，是的，我使用c＃btw

Answer 1

“解决方案”

这并不是解决问题的真正方法，但是我想分享我的解决方法。

我将所有可检查项目的可能组合添加到db请求中，询问数据库条目是否为这些组合之一（例如代码中的示例）


MySqlCommand führerscheinab = conn.CreateCommand();
            führerscheinab.CommandText = "SELECT count(*) FROM bewerber WHERE id = '" + textBoxrecruitingid.Text + "' and führerschein = 'A,B,'";
            string countab = führerscheinab.ExecuteScalar().ToString();

            MySqlCommand führerscheinabe = conn.CreateCommand();
            führerscheinabe.CommandText = "SELECT count(*) FROM bewerber WHERE id = '" + textBoxrecruitingid.Text + "' and führerschein = 'A,BE,'";
            string countabe = führerscheinabe.ExecuteScalar().ToString();

            MySqlCommand führerscheinac1 = conn.CreateCommand();
            führerscheinac1.CommandText = "SELECT count(*) FROM bewerber WHERE id = '" + textBoxrecruitingid.Text + "' and führerschein = 'A,C1,'";
            string countac1 = führerscheinac1.ExecuteScalar().ToString();

            MySqlCommand führerscheinac = conn.CreateCommand();
            führerscheinac.CommandText = "SELECT count(*) FROM bewerber WHERE id = '" + textBoxrecruitingid.Text + "' and führerschein = 'A,C,'";
            string countac = führerscheinac.ExecuteScalar().ToString();

            MySqlCommand führerscheinac1e = conn.CreateCommand();
            führerscheinac1e.CommandText = "SELECT count(*) FROM bewerber WHERE id = '" + textBoxrecruitingid.Text + "' and führerschein = 'A,C1E,'";
            string countac1e = führerscheinac1e.ExecuteScalar().ToString();

剩下要做的就是为每个结果创建一个if语句，例如：

if (countab == 1)
{
 check a and b
}
else if (countabe == 1)
{
 check a and be
}
else if ( ... and so on

并不是我想要的解决方案，当然也不能在考虑资源的情况下做到最好，但是是的。.^^

Answer 2

真正的解决方案

由于我对上一个“解决方案”不满意，因此我尝试了更多，并尝试使用以下方法：

def download(url, outputPath):
    fileName = get_file_name(url)
    logger.info("url: %s" %(url))
    print("url: ", url)
    curl = pycurl.Curl()
    curl.setopt(pycurl.CAINFO, certifi.where())
    curl.setopt(pycurl.URL, url)
    curl.setopt(pycurl.NOPROGRESS, 0)
    curl.setopt(pycurl.PROGRESSFUNCTION, downloadProgress)
    curl.setopt(pycurl.FOLLOWLOCATION, 1)
    curl.setopt(pycurl.MAXREDIRS, 5)
    curl.setopt(pycurl.CONNECTTIMEOUT, 50)
    curl.setopt(pycurl.TIMEOUT, timeOut)
    curl.setopt(pycurl.FTP_RESPONSE_TIMEOUT, 600)
    curl.setopt(pycurl.NOSIGNAL, 1)
    curl.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_BASIC)
    curl.setopt(pycurl.USERPWD, "Vthamburaj" + ':' + "Vicky@1987")

    if os.path.exists(os.path.join(outputPath, fileName)):
        curl.fp = open(os.path.join(outputPath, fileName), "ab")
        curl.setopt(pycurl.RESUME_FROM, os.path.getsize(os.path.join(outputPath, fileName)))
    else:
        curl.fp = open(os.path.join(outputPath, fileName), "wb")

    curl.setopt(pycurl.WRITEDATA, curl.fp)

    try:
        print("Start time: " + time.strftime("%c"))
        logger.debug("Download start time: " + time.strftime("%c"))

        curl.perform()

        print("\nTotal-time: " + str(curl.getinfo(curl.TOTAL_TIME)))
        print("Download speed: %.2f bytes/second" % (curl.getinfo(curl.SPEED_DOWNLOAD)))
        print("Document size: %d bytes" % (curl.getinfo(curl.SIZE_DOWNLOAD)))
        logger.debug("Total-time: " + str(curl.getinfo(curl.TOTAL_TIME)))
        logger.debug("Download speed: %.2f bytes/second" % (curl.getinfo(curl.SPEED_DOWNLOAD)))
        logger.debug("Document size: %d bytes" % (curl.getinfo(curl.SIZE_DOWNLOAD)))
    except:
        logger.error("download failed - ", exc_info=True)
        print("download failed!!! check log for detailed message")

    curl.close()
    curl.fp.close()
    sys.stdout.flush()

分配分割符char

MySqlCommand führerscheinstring = conn.CreateCommand();
            führerscheinstring.CommandText = "SELECT führerschein FROM bewerber WHERE id = '" + textBoxrecruitingid.Text + "'";
            string stringführerschein = führerscheinstring.ExecuteScalar().ToString();
            char[] charSeparators = new char[] { ',' };
            string[] result;

            result = stringführerschein.Split(charSeparators, StringSplitOptions.None);

            foreach (string entry in result)
            {
                if (entry == "A")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(0,true);
                }
                else if (entry == "B")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(1, true);
                }
                else if (entry == "BE")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(2, true);
                }
                else if (entry == "C1")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(3, true);
                }
                else if (entry == "C")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(4, true);
                }
                else if (entry == "C1E")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(5, true);
                }
                else if (entry == "CE")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(6, true);
                }
                else if (entry == "D1")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(7, true);
                }
                else if (entry == "D")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(8, true);
                }
                else if (entry == "D1E")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(9, true);
                }
                else if (entry == "DE")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(10, true);
                }
                else if (entry == "L")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(11, true);
                }
                else if (entry == "T")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(12, true);
                }
                else if (entry == "ADR")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(14, true);
                }
                else if (entry == "ADR Tank")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(15, true);
                }
                else if (entry == "Module vorhanden")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(16, true);
                }
                else if (entry == "Fahrerkarte vorhanden")
                {
                    checkedListBoxrecruitingführerschein.SetItemChecked(17, true);
                }
                else
                {
                }
            }

选择要检查的内容（17是项目ID（从0开始）为true表示将对项目进行检查）

char[] charSeparators = new char[] { ',' };

从字符串提要CheckedListBox

2 个答案: