Question

我需要代码生成一个随机电话号码，如果它选择了331前缀，那么它必须有2x运营商号码，如果它选择333那么它必须包含5x运营商号码，最后随机数字，但如果它是381那么它是7位数字，如果它是389它是一个6位数字我已经这样做了，但最后它没有打印出任何东西。

public static void LargeExport(string filename)
{
    using (SpreadsheetDocument document = SpreadsheetDocument.Create(filename, SpreadsheetDocumentType.Workbook))
    {
        //this list of attributes will be used when writing a start element
        List<OpenXmlAttribute> attributes;
        OpenXmlWriter writer;

        document.AddWorkbookPart();
        WorksheetPart workSheetPart = document.WorkbookPart.AddNewPart<WorksheetPart>();

        writer = OpenXmlWriter.Create(workSheetPart);            
        writer.WriteStartElement(new Worksheet());
        writer.WriteStartElement(new SheetData());

        for (int rowNum = 1; rowNum <= 115000; ++rowNum)
        {
            //create a new list of attributes
            attributes = new List<OpenXmlAttribute>();
            // add the row index attribute to the list
            attributes.Add(new OpenXmlAttribute("r", null, rowNum.ToString()));

            //write the row start element with the row index attribute
            writer.WriteStartElement(new Row(), attributes);

            for (int columnNum = 1; columnNum <= 30; ++columnNum)
            {
                //reset the list of attributes
                attributes = new List<OpenXmlAttribute>();
                // add data type attribute - in this case inline string (you might want to look at the shared strings table)
                attributes.Add(new OpenXmlAttribute("t", null, "str"));
                //add the cell reference attribute
                attributes.Add(new OpenXmlAttribute("r", "", string.Format("{0}{1}", GetColumnName(columnNum), rowNum)));

                //write the cell start element with the type and reference attributes
                writer.WriteStartElement(new Cell(), attributes);
                //write the cell value
                writer.WriteElement(new CellValue(string.Format("This is Row {0}, Cell {1}", rowNum, columnNum)));

                // write the end cell element
                writer.WriteEndElement();
            }

            // write the end row element
            writer.WriteEndElement();
        }

        // write the end SheetData element
        writer.WriteEndElement();
        // write the end Worksheet element
        writer.WriteEndElement();
        writer.Close();

        writer = OpenXmlWriter.Create(document.WorkbookPart);
        writer.WriteStartElement(new Workbook());
        writer.WriteStartElement(new Sheets());

        writer.WriteElement(new Sheet()
        {
            Name = "Large Sheet",
            SheetId = 1,
            Id = document.WorkbookPart.GetIdOfPart(workSheetPart)
        });

        // End Sheets
        writer.WriteEndElement();
        // End Workbook
        writer.WriteEndElement();

        writer.Close();

        document.Close();
    }
}

//A simple helper to get the column name from the column index. This is not well tested!
private static string GetColumnName(int columnIndex)
{
    int dividend = columnIndex;
    string columnName = String.Empty;
    int modifier;

    while (dividend > 0)
    {
        modifier = (dividend - 1) % 26;
        columnName = Convert.ToChar(65 + modifier).ToString() + columnName;
        dividend = (int)((dividend - modifier) / 26);
    }

    return columnName;
}

Answer 1

你有几个问题。首先，如果您在之前重置数组，则回显它们，每次都会得到相同的结果。

接下来，您需要针对字符串测试数组第一个位置中元素的key，例如'a'，而不是['a']，因为第二个示例永远不会匹配，除非你的密钥有括号。

最后，您必须在已经洗牌的任何后续数组的第一个位置返回该元素。您有两个名称相同的数组$string_prefix - 第二个数组覆盖第一个数组。您需要额外的逻辑来做出决定：

//an array containing the prefixes $string_preprefix = array('a' => '331', 'b' => '333',); shuffle($string_preprefix); //reset($string_preprefix); if('389' == $string_preprefix[0]) { // this value is not in the original array //an array containing the operator numbers for the 389 prefix $string_prefix = array('20', '22', '23', '24', '26', '28', '29',); shuffle($string_prefix); //reset($string_prefix); } elseif ('381' == $string_preprefix[0]) { // this value is not in the original array //an array containing the operator numbers for the 381 prefix $string_prefix = array('53', '54', '55', ); shuffle($string_prefix); //reset($string_prefix); } else { $string_prefix = '0000'; } //a function that generates random number function generateRandomNumber($length = 6) { $number = '1234567890'; $numberLength = strlen($number); $randomNumber = ''; for ($i = 0; $i < $length; $i++) { $randomNumber .= $number[rand(0, $numberLength - 1)]; } return $randomNumber; } //the if/elseif method doesn't print anything if (key($string_preprefix) == 'a'): echo $string_preprefix[0] . $string_prefix[0] . generateRandomNumber(6); elseif(key($string_preprefix) == 'b'): echo $string_preprefix[0] . $string_prefix[0] . generateRandomNumber(7); endif;

此外，我同意@ IanDrake的评论 - shuffle()可能不会做你想要的。您将要执行数组的随机化。

随机电话号码xxx或yyy +运营商号码mm或nn + php中随机的6位或7位数字

1 个答案: