StrSpn & StrCSpn in C#

After converting the c/c++ string tokenizing command strtok to c#, I thought I would look around to see there were any other interesting string commands in c/c++ that had not been integrated into c#. What I found was strspn and strcspn.

strspn (String Span) Returns the length of the longest substring that begins at the start of the string and consists only of the characters found in the supplied character array.

Code Snippet

1. private int strspn(string InputString, char[] Mask)


2. {


3.     int count = 0;


4.  


5.     foreach (var c in InputString)


6.     {


7.         if (!Mask.Contains(c)) break;


8.  


9.         count++;


10.     }


11.     return count;


12. }

strcspn (String Complement Span) Returns the length of the longest substring that begins at the start of the string and contains none of the characters found in the supplied character array.

Code Snippet

1.     private int strcspn(string InputString, char[] Mask)


2.     {


3.         int count = 0;


4.  


5.         foreach (var c in InputString)


6.         {


7.             if (Mask.Contains(c)) break;


8.  


9.             count++;


10.         }


11.         return count;


12.     }


13. }

C# TechTip #1 Using MaxLength as AutoTab

So, for all those old VB6 programmers out there: Remember The Visual Basic Programmers Journal TechTip publications.

For me, those pamphlets where the most eagerly waited part of my VBPJ publication. Here are the links to PDF versions.

VBPJ TechTips #1
VBPJ TechTips #2
VBPJ TechTips #3
VBPJ TechTips #4
VBPJ TechTips #5
VBPJ TechTips #6
VBPJ TechTips #7
VBPJ TechTips #8
VBPJ TechTips #9
VBPJ TechTips #10
VBPJ TechTips #11
VBPJ TechTips #12

I learned sooooo much from these. The loss of these publications is just one of the reasons that VSM is just a shadow of VBPJ. Just for a walk through memory lane I read through some of them, seeing if any of them would apply to C# today. Most of the tips were not transferable, but a few could be.

So, here is the first "New" C# TechTip: Originally by Karl E. Peterson

How to add an AutoTab feature to textboxes that have a set MaxLength. Connect the textboxes' TextChanged Event to this function:

Code Snippet

1. private void textBox_TextChanged(object sender, EventArgs e)


2. {


3. if((sender as TextBox).MaxLength == (sender as TextBox).TextLength) SendKeys.Send("{TAB}");


4. }

Who knew that the Dot Net designers had included the SendKeys function!?!

Bye bye 1and1 - Hello GoDaddy!

I'm done. I've put up with 1and1's broken ASP.Net implementation. GoDaddy is even cheaper! Well, as I go through this painful experience - I'll keep everyone updated!

Now I can finally do all the things I've learned in ASP.Net 3.5. And, I'll be able to use 4.0 additions before I grow old!

Thank you GoDaddy.

And 1and1? Dudes, it has been five years now and you still have not gotten a full implementation of ASP.Net 2.0 up and running? Wow ...