使用正则表达式替换文件

问题描述

我试图取代月份标签即月名称内部文本应替换其规定月份数。我想这一点，

i tried to replace inner text of the month tag i.e month names should be replaced with their specified month number.i tried this,

 Dim strFile As String = File.ReadAllText(TextBox1.Text & "\" & parentFolder & ".xml")
    strFile = Regex.Replace(strFile, "<conf-start iso-8601-date=""([0-9-]+)""><day>([0-9]+)</day><month>March</month>", "<conf-start iso-8601-date=""([0-9-]+)""><day>([0-9]+)</day><month>03</month>")
    File.WriteAllText(TextBox1.Text & "\" & parentFolder & ".xml", strFile)

现在的问题是，如果该行是这样的，

now the problem is that if the line is like this,

<conf-start iso-8601-date="2011-03-06"><day>06</day><month>March</month><year>2011</year></conf-start>

下面上述EX pression被捕获的数据，并用其替换，

here the above expression is catching the data and replaces it with,

<conf-start iso-8601-date=""([0-9-]+)""><day>([0-9-]+)</day><month>03</month><year>2011</year></conf-start>

相反，它应该替换

instead it should replace

<conf-start iso-8601-date="2011-03-06"><day>06</day><month>03</month>

任何帮助将真正aprreciated

any help will be really aprreciated

推荐答案

您可以做到这一点是这样的：

You could do it like this:

Dim doc As New XmlDocument()
Dim months As IDictionary(Of String, String) = New Dictionary(Of String, String)() From {{"January", "1"}, {"February", "2"}, {"March", "3"}, {"April", "4"}, {"May", "5"}, {"June", "6"}, {"July", "7"}, {"8", "August"}, {"September", "9"}, {"October", "10"}, {"November", "11"}, {"December", "12"}}
Dim expr As New Regex([String].Join("|", months.Keys))
Dim strFile As String = "May"

doc.Load(TextBox1.Text & "\" & parentFolder & ".xml")

For Each item As XmlNode In doc.GetElementsByTagName("month")
    item.Value = expr.Replace(item.Value, Function(m) months(m.Value))
Next

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