Regex 获取空白值或-+；要在正则表达式中显示的数字$value

我试图从上面的正则表达式行中提取所有需要的数据。使用VB.net，我有前5件事，但一旦需要一个-/+$数字，有时显示为无字符，我就卡住了

到目前为止，这是可行的

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 r As New System.Text.regular expressions.Regex（“Symbol=（？。.w+）\&AuctionPrice=（？。.d.\d+）\&AuctionSize=（？。.d+）\&AuctionImbalance=（？.a*）\&AuctionImbalanceMkt=（？.a*））

AuctionIndNetChange=（我在这里寻找可以从中提取价值的东西）

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谢谢

您可以使用以下正则表达式：

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

输出：

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")))

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您可以使用以下正则表达式：

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

输出：

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")))