Question

我有textLines1中的所有行，我想计算所有这些行的平均经过时间。我试过这个正则表达式。但它给了我错误的计算。

日志文件格式：

INFO:  WX ADVSearch = Server:testserver Entity:BUG User:acucu Elapsed Time:274ms 
INFO:  WX ADVSearch = Server:testserver Entity:BUG User:acucu Elapsed Time:274ms

我尝试的代码是：

List<string> textLines1 = new List<string>(users);
string x = string.Join(",", textLines1);
Regex regex = new Regex(@"Elapsed Time:\s*(?<value>\d+\.?\d*)\s*ms");
Match match = regex.Match(x);
double totalTime = 0;
int count = 0;

foreach (string line in textLines1)
{
    if (match.Captures.Count > 0)
    {
        try
        {
            count++;
            double time = Double.Parse(match.Groups["value"].Value);
            totalTime += time;
        }
        catch (Exception)
        {
            // no number
        }
    }
}

double average = totalTime / count;
Console.WriteLine("ADVAverage=" + average);

Answer 1

private static void CalculateTotalTime()
{
    Regex pattern = new Regex(@"INFO:.+Elapsed Time:(?<milliseconds>\d+(\.\d{1,2})?)ms");

    double totalMilliseconds = (from Match match in pattern.Matches(input)
                                let milliseconds = double.Parse(match.Groups["milliseconds"].Value)
                                select milliseconds).Sum();

    TimeSpan elapsed = TimeSpan.FromMilliseconds(totalMilliseconds);
    Console.WriteLine("{0:D2}:{1:D2}:{2:D2}:{3:D3}", elapsed.Hours, elapsed.Minutes, elapsed.Seconds, elapsed.Milliseconds);
}


private const string input =
    "INFO: WX ADVSearch = Server:yukon.corp.adobe.com Entity:BUG User:acucu Elapsed Time:274ms\n" +
    "INFO: WX ADVSearch = Server:yukon.corp.adobe.com Entity:BUG User:acucu Elapsed Time:27.5ms\n" +
    "INFO: WX ADVSearch = Server:yukon.corp.adobe.com Entity:BUG User:acucu Elapsed Time:500.55ms";

我刚用给定的测试数据编写并测试了上述方法，计算结果准确无误。

Answer 2

您的代码有一些错误（在我看来）：

string.Join收到string[]，您传递了List<string>。
你真的不需要做任何string.Join。相反，只需遍历每一行，并捕获每一行中的匹配。

请参阅以下代码：

//I don't think you have to do this. Instead, you can iterate through `users`
string[] textLines1 = new List<string>(users).ToArray();
double totalTime = 0;
int count = 0;

//For each line
foreach (string line in textLines1) {
    //Here we match against this line
    var m = Regex.Match(line, @"Elapsed Time:\s*(?<value>\d+\.?\d*)\s*ms");
    //If it matched...
    if (m.Success) {
        try
        {
            count++;
            double time = Double.Parse(m.Groups["value"].Value);
            totalTime += time;
        }

        catch (Exception)
        {
            // no number
        }
    }
}

double average = totalTime / count;
Console.WriteLine("ADVAverage=" + average);

以下是输出：

ADVAverage = 274

Answer 3

我认为你的正则表达式不够正确。您可能还想考虑以下匹配：

"Elapsed Time:.*ms"

要获取该号码，您可以截断前13个字符和后2个字符。然后每行，您可以使用Double.TryParse（因为您自己没有进行任何特殊处理，您可以让TryParse方法为您执行此操作并保持您自己的代码更清洁）以获取您的数字感兴趣的。

您可以查看正则表达式，看看它是否在网站上正确匹配，例如http://regexpal.com/。

我想计算C＃中日志的总耗用时间

3 个答案: