CODEWITHSUNDEEP
stringvb.net
ruedi
ruedi

Reputation: 5545

Get Substring of a String by Startindex and Endindex

I try to extrat 1,2,3 as a String from the String Data:[1,2,3]. Doing this with the following Code gives me the Error Index and length must refer to a location within the string it looks like I am completely blind but I do not see what is wrong. Could anyone help me?

Sub Main()
    Dim name As String = "Data:[1,2,3]"
    Console.Write(name.Substring(6, name.Length - 1))
    Console.Read()
End Sub

Upvotes: 3

Views: 1838

Answers (1)

Tim Schmelter
Tim Schmelter

Reputation: 460058

The second argument in String.Substring is the length, so the number of characters that should be taken from the first argument's index. You should look for the brackets instead:

Dim startIndex = name.IndexOf("["c)
If startIndex >= 0 Then
    Dim endIndex = name.IndexOf("]"c, startIndex)
    If endIndex >= 0 Then
       startIndex += 1 ' because you dont want to include the  brackets
       Dim data = name.Substring(startIndex, endIndex - startIndex)
    End If
End If

Upvotes: 3

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