Solved

Trimming a string to shorten at an unspecified position.

Posted on 2006-07-06
7
281 Views
Last Modified: 2010-04-16
Given:
  1. variable length string, output from database
  2. Need to display no MORE than 80 characters
  3. Cannot end string on broken word (for instance, cutting at exactly 80 characters would be bad if it cuts a word in half)

The idea here is that I have a string from a field in a database. I want to trim it to 80 characters or as close to 80 without going over as I can get, without cutting any words in half.

To help, in ASP classic (which I'm converting from, to C#), I did it like this:

shortBody = Left(objRS(8), InStrRev(Left(objRS(8), 80), " "))


C# Only please.
0
Comment
Question by:Paul Kahl
  • 3
  • 3
7 Comments
 
LVL 5

Expert Comment

by:bastibartel
ID: 17053214
int pos=1000;

CString String( "...long text ...");

int pos = String.ReverseFind(' ');
while(pos>80)
{
   pos = String.ReverseFind(' ');
   if (pos>=0)
        String = String.Left(pos);
}
0
 
LVL 5

Expert Comment

by:bastibartel
ID: 17053257
Sry, I clicked too soon,

CString String( "...long text ...");

int pos = String.ReverseFind(' ');
while(pos>80)
{
   String = String.Left(pos);
   pos    = String.ReverseFind(' ');
}
if (pos >0)
    return String.Left(pos);
else
   return "";

Oh, and I don't know, is CString C# ?
0
 
LVL 3

Author Comment

by:Paul Kahl
ID: 17053304
cStr is VB, but I get the gist... refactoring and testing now...
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 13

Accepted Solution

by:
devsolns earned 500 total points
ID: 17053322
       public static string SpecialTrim(string value)
        {
            if (value.Length < 80)
                return value;
            //trim to 80
            value = value.Substring(0, 80);
            if (value.Substring(79, 1) != " ")//is last char a space?
            {
                int lastSpaceIndex = value.LastIndexOf(" ");
                if (lastSpaceIndex == -1)
                    return value;
                return value.Substring(0, lastSpaceIndex);
            }
            else
                return value;
        }
0
 
LVL 3

Author Comment

by:Paul Kahl
ID: 17053393
Tested both of your answers, and discovered too many errors in Basti's to be able to easily refactor. Devsolns' answer was dead on, no need to refactor.

Thanks muchly for the help!
0
 
LVL 3

Author Comment

by:Paul Kahl
ID: 17053418
Modified to take input of desired length:

public string RenderBodyTextShort(string inputString, int intDesiredStringLength)
    {
        if (inputString.Length <= intDesiredStringLength)
        {
            return inputString;
        }
        else
        {
            inputString = inputString.Substring(0, intDesiredStringLength);
            if (inputString.Substring(49, 1) != " ")
            {
                int lastSpaceIndex = inputString.LastIndexOf(" ");
                if (lastSpaceIndex == -1)
                    return inputString;
                return inputString.Substring(0, lastSpaceIndex);
            }
            else
            {
                return inputString;
            }
        }
    }
0
 
LVL 5

Expert Comment

by:bastibartel
ID: 17053430
Yeah sry, was missing a compiler. Take care,
Sebastian
0

Featured Post

Secure Your Active Directory - April 20, 2017

Active Directory plays a critical role in your company’s IT infrastructure and keeping it secure in today’s hacker-infested world is a must.
Microsoft published 300+ pages of guidance, but who has the time, money, and resources to implement? Register now to find an easier way.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Article by: Ivo
C# And Nullable Types Since 2.0 C# has Nullable(T) Generic Structure. The idea behind is to allow value type objects to have null values just like reference types have. This concerns scenarios where not all data sources have values (like a databa…
Introduction Although it is an old technology, serial ports are still being used by many hardware manufacturers. If you develop applications in C#, Microsoft .NET framework has SerialPort class to communicate with the serial ports.  I needed to…
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
Attackers love to prey on accounts that have privileges. Reducing privileged accounts and protecting privileged accounts therefore is paramount. Users, groups, and service accounts need to be protected to help protect the entire Active Directory …

680 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question