Question

有这样的功能，它从ID列表中创建字符串我尝试在50个线程中运行它，30秒后它挂起应用程序

public string genText(List<string> list)
{
    string text = @"{""text"":""";
    for (int i = 0; i < list.Count; i++)
    {
        if (i < list.Count - 1)
            text += "!" + " ";
        else
            text += "!" + @""", ";
    }

    text += @"""start"":[";
    for (int i = 0, lim = -2; i < list.Count; i++)
    {
        lim += 2;
        if (i < list.Count - 1)
            text += @"""" + lim + @""",";
        else
            text += @"""" + lim + @"""], ";
    }

    text += @"""end"":[";

    for (int i = 1, lim = -1; i < list.Count + 1; i++)
    {
        lim += 2;
        if (i < list.Count)
            text += @"""" + lim + @""",";
        else
            text += @"""" + lim + @"""], ";
    }

    text += @"""type"":[";
    for (int i = 0; i < list.Count; i++)
    {
        if (i < list.Count - 1)
            text += @"""USER"",";
        else
            text += @"""USER""], ";
    }

    text += @"""objectId"":[";
    for (int i = 0; i < list.Count; i++)
    {
        if (i < list.Count - 1)
            text += @"""" + list[i] + @""",";
        else
            text += @"""" + list[i] + @"""]}";
    }

    return text;
}

编写此类函数的最佳（替代）方式是什么？

预期结果：{"text":"! ! ! ! ! ! ! ! ! ! ! ! ! ! !", "start":["0","2","4","6","8","10","12","14","16","18","20","22","24","26","28"], "end":["1","3","5","7","9","11","13","15","17","19","21","23","25","27","29"], "type":["USER","USER","USER","USER","USER","USER","USER","USER","USER","USER","USER","USER","USER","USER","USER"], "objectId":["524231066205","363249609235","509321690322","551832845250","273337925148","553378679618","552270073142","256641407","545454406232","548096729194","555315805314","553271555117","573655339037","518779453704","486606264340"]}

Answer 1

不使用串联字符串，而是使用StringBuilder类更有效。

public string genText(List<string> list)
{
    StringBuilder text = new StringBuilder();
    text.Append(@"{""text"":""");
    for (int i = 0; i < list.Count; i++)
    {
        if (i < list.Count - 1)
            text.Append("!" + " ");

    ...

    return text.ToString();
}

但正如其他人在评论中提到的那样，如果你想创建Json数据，请使用Json库。

从列表创建字符串的替代方法

1 个答案: