Question

MsgType=GetMarketAuction&Symbol=XLF&AuctionPrice=24.50&AuctionSize=57138&AuctionImbalance=0&AuctionImbalanceMkt=0&AuctionIndNetChange=&ClosingPrice=24.54&BidPrice=24.36&AskPrice=24.37&EC=0&ES=&AuctionImbalanceStatus=&AuctionMktImbalanceStatus=&Delta=

我试图从上面的正则表达式行中提取所需的所有数据。使用VB.net我有前5个东西，但是一旦需要 - / + $号就会被卡住，有时会显示为无字符。

到目前为止这是有效的。

Dim r As New System.Text.RegularExpressions.Regex("Symbol=(?<1>.\w+)\&AuctionPrice=(?<2>.\d.\d+)\&AuctionSize=(?<3>.\d+)\&AuctionImbalance=(?<4>.a*)\&AuctionImbalanceMkt=(?<5>.a*)")

AuctionIndNetChange =（我在这里寻找一些东西来拉取价值）

谢谢！

Answer 1

您可以使用以下正则表达式：

Symbol=(?<1>[^&]*)&AuctionPrice=(?<2>[^&]*)&AuctionSize=(?<3>[^&]*)&AuctionImbalance=(?<4>[^&]*)&AuctionImbalanceMkt=(?<5>[^&]*)&AuctionIndNetChange=(?<6>[^&]*)

请参阅demo

请注意，您不必在捕获组的名称中使用数字，您可以删除所有?<n>，您将获得相同的结果。

此外，我使用[^&]*替换了捕获组中的所有子模式，这意味着 0个或更多字符，而不是& ，因为它们都在查询字符串中

HOWEVER ，您可以使用System.Web.HttpUtility.ParseQueryString的非正则路由方式（不要忘记添加对System.Web的引用！）：

Dim querystr As String = "MsgType=GetMarketAuction&Symbol=XLF&AuctionPrice=24.50&AuctionSize=57138&AuctionImbalance=0&AuctionImbalanceMkt=0&AuctionIndNetChange=&ClosingPrice=24.54&BidPrice=24.36&AskPrice=24.37&EC=0&ES=&AuctionImbalanceStatus=&AuctionMktImbalanceStatus=&Delta="
        Dim qscoll As System.Collections.Specialized.NameValueCollection = HttpUtility.ParseQueryString(querystr)
        Console.WriteLine(String.Format("AuctionSize: {0}, Symbol: {1}, AuctionPrice: {2}, AuctionSize: {3}, AuctionImbalance: {4}, AuctionImbalanceMkt: {5}, AuctionIndNetChange: {6}",
        qscoll("AuctionSize"), _
        qscoll("Symbol"), _
        qscoll("AuctionPrice"), _
        qscoll("AuctionSize"), _
        qscoll("AuctionImbalance"), _
        qscoll("AuctionImbalanceMkt"), _
        qscoll("AuctionIndNetChange")))

输出：

AuctionSize: 57138, Symbol: XLF, AuctionPrice: 24.50, AuctionSize: 57138, AuctionImbalance: 0, AuctionImbalanceMkt: 0, AuctionIndNetChange:

获取空白值或 - +数字$值以显示在Regex中

1 个答案: