Extract specific data from a string.

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Any easy/reliable way to get the 'ASPxFormLayout1' value from this string.
The value could change - ideally want a method of extracting the data between the quotes after 'ID='

String is :
<dx:ASPxFormLayout ID="ASPxFormLayout1" runat="server" DataSourceID="SqlDataSource1">

What I have tried:

Tried instr but not sure on wildcards? and even if I could find it not sure how to extract what I want. Thanks.

Posted 2-Feb-18 5:18am

Member 10103170

Updated 2-Feb-18 5:29am

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2 solutions

Solution 1

If you mean "get the ID data between the double quotes" then use a regex:

(?<=ID=").+(?="\s*runat=)

Should do it.

VB

Public Dim regex As Regex = New Regex( _
      "(?<=ID="").+(?=""\s*runat=)", _
    RegexOptions.Multiline _
    Or RegexOptions.Singleline _
    Or RegexOptions.CultureInvariant _
    Or RegexOptions.Compiled _
    )

'...
Dim m As Match = regex.Match(InputText)
If m.Success Then
   Dim id as String = m.Value
   ' ...
End If

Posted 2-Feb-18 5:28am

OriginalGriff

Comments

Richard Deeming 2-Feb-18 11:30am

That one only works if the runat= immediately follows the ID. :)

OriginalGriff 2-Feb-18 11:38am

Then yours needs a '?' after the '+' :laugh:

Richard Deeming 2-Feb-18 11:41am

Only if you're planning to match an empty ID. But the ternary operator already deals with that. :)

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Richard Deeming · Accepted Answer · 2018-02-02T05:29:00

Regular Expression Language - Quick Reference | Microsoft Docs[^]

VB.NET

Dim input As String = "<dx:ASPxFormLayout ID=""ASPxFormLayout1"" runat=""server"" DataSourceID=""SqlDataSource1"">"
Dim m As Match = Regex.Match(input, "\bID=""(?<id>[^""]+)""")
Dim id As String = If(m.Success, m.Groups("id").Value, "")
' id === "ASPxFormLayout1"