CODEWITHSUNDEEP
vb.netstringsearchsubstring
coolestDisplayName
coolestDisplayName

Reputation: 171

How to find a value within a substring within a string in VB.NET

In VB.NET I need to find a value inside of a substring within a larger string.

For example, MyString is a string

MyString = "
============================
Channel      -->  36
Antenna      -->  127
MCS Level    -->  14
Bandwidth    -->  20
Packet Size  -->  4000
11N signal?  -->  1
BF Config    -->  0
============================"

If I need to find a particular value, say MCS level from that string, do I search for the location of "MCS Level --> " and find the value of the next 2 chars?

Or is there a way to search for "MCS Level --> %s" and find the value of %s within MyString?

Thanks! I appreciate the help. I want to do this properly.

Upvotes: 0

Views: 793

Answers (2)

NeverHopeless
NeverHopeless

Reputation: 11233

You can try regex as well. Check with this pattern:

MCS Level\D+(\d+)

It will give you the desired result 14.

Regex Demo

EDIT

Sample Code: (untested, to give an idea)

Dim mcol as MatchCollection = System.Text.RegularExpression.Regex.Matches(MyString,"MCS Level\D+(\d+)")

for each m as match in mcol
   Debug.Print("MCS Level is : " & m.ToString())
Next

Upvotes: 0

Steven Liekens
Steven Liekens

Reputation: 14088

For this particular example, I would first split the string by new lines, then split each line again by whitespace (ignoring empty occurrences). That leaves you with a jagged array containing every piece of non-whitespace text per line.

Function GetMcsLevel(myString As String) As Integer
    For Each line As String In MyString.Split(Environment.NewLine)
        Dim pieces() As String = line.Split(New Char() {" "c}, StringSplitOptions.RemoveEmptyEntries)   
        If pieces.First() = "MCS Level" Then
            Return Integer.Parse(pieces.Last())
        End If
    Next
End Function

Upvotes: 1

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