Extending CStringArray

Environment: VC6 SP3, NT4 SP4

One of the reasons I left C and began to use C++ was CString and even more so CStringArray. These two classes are worth all the other aggravation when going OO. I don't claim that they are perfect. There are things missing in both of those classes and I would like to share this extension of CStringArray that I have made.

Finding an string in a CStringArray

One of the things that I think are missing in CStringArray is a Find method. I find myself wanting to get a specific string out of the array and I know part, or the whole, of it. Not the position in the array. So I added this method. It is very straight forward and uses CString::Find to find the string.

Example:


 meStringArray arr;
	
 // fill the array with strings using the normal Add()
 arr.Add("This is a String");
 arr.Add("The second string");
 arr.Add("the 3:rd string");
	
 // find the third string
 int i=arr.Find("3:rd");
   	
 // i is now 2
 CString sBuf;
   	
 sBuf=arr.GetAt(i);
   	
 // sBuf has now the value of "the 3:rd string"

Array of NULL terminating strings

Some SDK-functions and some classes still using an array of NULL terminating strings. e.g. CFileDialog uses this kind of array for the filters. GetProfileString("section",NULL,"",buf,sizeof(buf)); also uses it, and there are many more. So every time you need to use this class/function you have to go back to C and do a lot of loops. Well I finally got tired of it and extended CStringArray with two methods; AddBuf() and GetBuf(). The first will take an array of NULL terminating strings and add it to the StringArray, and the second will do the reverse

Example GetBuf:


 CFileDialog dlg;
 meStringArray filter;
	
 // init filter
 filter.Add("All files");
 filter.Add("*.*");
 filter.Add("Doc files");
 filter.Add("*.doc");
 filter.Add("Text files");
 filter.Add("*.txt");
	
 // Init file dialog
 dlg.m_ofn.lpstrFilter=filter.GetBuf();
 dlg.m_ofn.lpstrInitialDir=initDir;
 dlg.m_ofn.Flags |= OFN_SHAREAWARE;
 int rc=dlg.DoModal();
 if(rc==IDOK)
 {
  m_filepath=dlg.GetPathName();
  UpdateData(FALSE);
 }

Example AddBuf:


 meStringArray arr;
 char buf[1024];
	
 // Get all printer names
 GetProfileString("devices",NULL,"",buf,sizeof(buf));	
	
 // add them to the array
 arr.AddBuf(buf);
	
 // Get the second printer name from the array
 CString sPrintName = arr.GetAt(2);

Well that's it! It's not a very large class so there is not so much to say. I hope that someone will find use for this and PLEASE let me know what you think! This is the first class I ever published so please say what you think about it, good, bad.

Downloads

Download source - 2 KB


Comments

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • The impact of a data loss event can be significant. Real-time data is essential to remaining competitive. Many companies can no longer afford to rely on a truck arriving each day to take backup tapes offsite. For most companies, a cloud backup and recovery solution will eliminate, or significantly reduce, IT resources related to the mundane task of backup and allow your resources to be redeployed to more strategic projects. The cloud - can now be comfortable for you – with 100% recovery from anywhere all …

  • You probably have several goals for your patient portal of choice. Is "community" one of them? With a bevy of vendors offering portal solutions, it can be challenging for a hospital to know where to start. Fortunately, YourCareCommunity helps ease the decision-making process. Read this white paper to learn more. "3 Ways Clinicians can Leverage a Patient Portal to Craft a Healthcare Community" is a published document owned by www.medhost.com

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds