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Find last occurance of a substring within a string

Posted on 2013-01-03
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Last Modified: 2013-01-08
I have the following string: which begins after the last '//':

"abc//def//hij//I am the owner"

I need to return "I am the owner" which always begins after the last '//':

The length of the final substring can vary.

What is the best way to do this?

Thanks
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Question by:Dovberman
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10 Comments
 
LVL 30

Assisted Solution

by:Randy Downs
Randy Downs earned 100 total points
ID: 38740784
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LVL 26

Expert Comment

by:EddieShipman
ID: 38740796
You can use this Regex and then remove the 2 slashes at the beginning:

//(?:.(?!//))+$

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Expert Comment

by:David L. Hansen
ID: 38740815
Dim myString As String = "abc//def//hij//I am the owner"
Dim arr As String()
arr = myString.Split(CChar("//")
messagebox.show(arr(arr.Length).ToString

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LVL 15

Assisted Solution

by:David L. Hansen
David L. Hansen earned 150 total points
ID: 38740832
In C#:
string myString = null;
myString = "abc//def//hij//I am the owner";
string[] arr = null;
arr = myString.Split(Convert.ToChar("//"));
messagebox.show(arr(arr.Length)).ToString();

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LVL 15

Expert Comment

by:David L. Hansen
ID: 38740872
Sorry, this should work:
        Dim myString As String = "abc//def//hij//I am the owner"
        Dim arr As String()
        myString.Replace("//", "#")
        arr = myString.Split(CChar("#"))
        MessageBox.Show(arr(arr.Length)).ToString()

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LVL 40

Assisted Solution

by:Jacques Bourgeois (James Burger)
Jacques Bourgeois (James Burger) earned 150 total points
ID: 38740889
Dim input As String = "abc//def//hij//I am the owner"
            Dim result As String

            result = input.Substring(input.LastIndexOf("//") + 2)
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Accepted Solution

by:
Dovberman earned 0 total points
ID: 38741317
There were several answers, but this is what worked for me.

             intFileCount += 1;
                strFileName = FileName;  // Full path of filename

                // strFileName1 is the actual file name is after last occurance of '\\'

                intLastPos = strFileName.LastIndexOf("\\");
                intStartPos = intLastPos+2;
                intFileNameLength = strFileName.Length;

                strFileName1 = strFileName.Substring(intStartPos, (intFileNameLength - intStartPos));
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LVL 26

Expert Comment

by:EddieShipman
ID: 38742257
No close, @Number-1 posted link to the answer.

Accept this one.
http://www.experts-exchange.com/Programming/Languages/.NET/Q_27983783.html#a38740784
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LVL 26

Expert Comment

by:EddieShipman
ID: 38742258
See last comment
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Author Closing Comment

by:Dovberman
ID: 38754098
Thanks for all the responses. These gave me hints for working out a solution.
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