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# Find and replace strings

Posted on 2011-02-22
Medium Priority
249 Views
Hi Experts,

I have a problem; I have a string called mystring as:
mystring = "ABC1254,ACB859,BCA9875"

I would like firstly to only get the first three characters of each item of mystring (each item is divided by a comma)
Then the result will be like this:
mystring = "ABC,ACB,BCA"

Finally, can I replace each item with its corresponding number? Such as:
ABC= 1
ACB =2
BCA =3

So, the final result is:
mystring = "1,2,3"

Note: I am using vb.net 2010
Regards
0
Question by:Sat80
• 2

LVL 7

Accepted Solution

klakkas earned 2000 total points
ID: 34950964
Using Split and Substring, you can achieve what you want.

Here is a code sample:

``````Dim mystring As String = "ABC1254,ACB859,BCA9875"
Dim Res As String = ""
For Each part As String In mystring.Split(Convert.ToChar(","))
Select Case part.Substring(0, 3)
Case "ABC"
Res += "1,"
Case "ACB"
Res += "2,"
Case "BCA"
Res += "3,"
End Select
Next
mystring = Res.Substring(0, Res.Length - 1)
``````
0

LVL 29

Expert Comment

ID: 34950969
First split the string into it's items:

Dim items as String() = mystring.Split(","C)

Then you can get the first characters of each item:

For i As Integer = 0 To items.Length - 1
items(i) = items(i).Substring(0, 3)
Next

Create a dictionary for the translations:

Dim replace As New Dictionary(Of String, String)

Check each string for a translation:

For i As Integer = 0 To items.Length - 1
If replace.ContainsKey(items(i)) Then
items(i) = replace(items(i))
End If
Next

Put the items back into a string again:

mystring = String.Join(",", items)
0

Author Closing Comment

ID: 34950986
Thanks!
0

Author Comment

ID: 34950995
Sry GreenGhost, I did not see your comment before accepting the first reply. Thank you for the help.
0

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