Programming Forums > Application Development > C#

csrocker101 · Apr 2nd, 2007, 1:22 PM

FIrst off I want to thank everyone for being extremely helpful as I try to complete a pretty big computer science project. I have got a server application and a client application and a database application.The database application is connected with the server application which logs and updates the information sent to it via the client . Its rather simple to update the database via the client you send the server a carriage and line return. Basically updating the database consists of sending a username string and a location string to the streamwriter such as "322095 In the labs" to the server. Putting a space in between two strings tells the server to update. If you do not wish to update the database only one string is passed with no space. So for instance if you do not wish to update the database a string passed to the stream writer looks like this "322095" which will then tell you were the student is. The problem I am having is in my server. Here is my code

(Toggle Plain Text)

public void doRequest()
        {
            //streamReader reads incoming connection from client
            
            StreamWriter sw = new StreamWriter(socketStream);
            StreamReader sr = new StreamReader(socketStream);
            //writes in coming data
           //Assigns data from the streamreader to a string
            string clientInfo = sr.ReadLine();

Basically the string clientInfo is the information the client sends to the server via the streamwriter. My problem is that the string will just appear as "322095 In the labs" but I want to check this invididual string to see if there is a space in between it. So for instance:

(Toggle Plain Text)

public void doRequest()
        {
            //streamReader reads incoming connection from client
            
            StreamWriter sw = new StreamWriter(socketStream);
            StreamReader sr = new StreamReader(socketStream);
            //writes in coming data
           //Assigns data from the streamreader to a string
            string clientInfo = sr.ReadLine();
           if(clientInfo == IF THERE IS A SPACE BETWEEN THE VARIABLES) 
           {
                //updateDatabase Commands
           }
          else
          {
                 //dont update database
          }

Obviously this is pseduocode but I want to know if I can check if there is a space in between the read in string. Is there a way I can do this?? I think the main problem is that the two strings are combined into one when i send it via the streamwriter, but i want to know if theres some way I can check if there is a space in just one string. I would appreciate some help. Thanks

Infinite Recursion · Apr 2nd, 2007, 1:32 PM

Use the IndexOf() function...

(Toggle Plain Text)

int pos = clientInfo.IndexOf(" ");
if (pos > 0)
   Console.WriteLine("Space in the string.");
else 
   Console.WriteLine("NO space in the string.");

kurifu · Apr 2nd, 2007, 11:00 PM

Makes me wonder how I used to tolerate doing string manipulation in C.

Infinite Recursion · Apr 3rd, 2007, 8:35 AM

Hah, That was quite a pain... In C, I would just loop through each element and compare it to " " and if it was equal would return true.

csrocker101 · Apr 4th, 2007, 7:30 AM

Thanks so much Infinite Recursion Helped alot!

Infinite Recursion · Apr 4th, 2007, 8:50 AM

np man, glad to help.

Ooble · Apr 6th, 2007, 7:50 AM

Quote:

Originally Posted by Infinite Recursion

Use the IndexOf() function...

(Toggle Plain Text)

int pos = clientInfo.IndexOf(" ");
if (pos > 0)
   Console.WriteLine("Space in the string.");
else 
   Console.WriteLine("NO space in the string.");

You'll want to check if pos is greater than or equal to 0 - a space can be the first character in a string too. If there is no space, the function will return -1.

Apr 2nd, 2007, 1:22 PM	#1
csrocker101 Programmer Join Date: Dec 2006 Posts: 49 Rep Power: 0	Help with breaking apart a string FIrst off I want to thank everyone for being extremely helpful as I try to complete a pretty big computer science project. I have got a server application and a client application and a database application.The database application is connected with the server application which logs and updates the information sent to it via the client . Its rather simple to update the database via the client you send the server a carriage and line return. Basically updating the database consists of sending a username string and a location string to the streamwriter such as "322095 In the labs" to the server. Putting a space in between two strings tells the server to update. If you do not wish to update the database only one string is passed with no space. So for instance if you do not wish to update the database a string passed to the stream writer looks like this "322095" which will then tell you were the student is. The problem I am having is in my server. Here is my code (Toggle Plain Text) public void doRequest() { //streamReader reads incoming connection from client StreamWriter sw = new StreamWriter(socketStream); StreamReader sr = new StreamReader(socketStream); //writes in coming data //Assigns data from the streamreader to a string string clientInfo = sr.ReadLine(); public void doRequest() { //streamReader reads incoming connection from client StreamWriter sw = new StreamWriter(socketStream); StreamReader sr = new StreamReader(socketStream); //writes in coming data //Assigns data from the streamreader to a string string clientInfo = sr.ReadLine(); Basically the string clientInfo is the information the client sends to the server via the streamwriter. My problem is that the string will just appear as "322095 In the labs" but I want to check this invididual string to see if there is a space in between it. So for instance: (Toggle Plain Text) public void doRequest() { //streamReader reads incoming connection from client StreamWriter sw = new StreamWriter(socketStream); StreamReader sr = new StreamReader(socketStream); //writes in coming data //Assigns data from the streamreader to a string string clientInfo = sr.ReadLine(); if(clientInfo == IF THERE IS A SPACE BETWEEN THE VARIABLES) { //updateDatabase Commands } else { //dont update database } public void doRequest() { //streamReader reads incoming connection from client StreamWriter sw = new StreamWriter(socketStream); StreamReader sr = new StreamReader(socketStream); //writes in coming data //Assigns data from the streamreader to a string string clientInfo = sr.ReadLine(); if(clientInfo == IF THERE IS A SPACE BETWEEN THE VARIABLES) { //updateDatabase Commands } else { //dont update database } Obviously this is pseduocode but I want to know if I can check if there is a space in between the read in string. Is there a way I can do this?? I think the main problem is that the two strings are combined into one when i send it via the streamwriter, but i want to know if theres some way I can check if there is a space in just one string. I would appreciate some help. Thanks

Apr 2nd, 2007, 1:32 PM	#2
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	Use the IndexOf() function... (Toggle Plain Text) int pos = clientInfo.IndexOf(" "); if (pos > 0) Console.WriteLine("Space in the string."); else Console.WriteLine("NO space in the string."); int pos = clientInfo.IndexOf(" "); if (pos > 0) Console.WriteLine("Space in the string."); else Console.WriteLine("NO space in the string."); __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Apr 2nd, 2007, 11:00 PM	#3
kurifu Expert Programmer Join Date: Jul 2004 Location: Halifax, Nova Scotia (Canada) Posts: 784 Rep Power: 5	Makes me wonder how I used to tolerate doing string manipulation in C. __________________ Clifford Matthew Roche <geek@cliffordroche.com> Web Hosting: http://www.crd-hosting.com Consulting: http://www.crdev-consulting.com

Apr 3rd, 2007, 8:35 AM	#4
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	Hah, That was quite a pain... In C, I would just loop through each element and compare it to " " and if it was equal would return true. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Apr 4th, 2007, 8:50 AM	#6
Infinite Recursion Programming Guru Join Date: Jul 2004 Location: United States Posts: 3,467 Rep Power: 8	np man, glad to help. __________________ http://jasonpowers.net "There are a thousand hacking at the branches of evil to one who is striking at the root."

Apr 4th, 2007, 7:30 AM	#5
csrocker101 Programmer Join Date: Dec 2006 Posts: 49 Rep Power: 0	Thanks so much Infinite Recursion Helped alot!

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Programming Forums > Application Development > C#

Help with breaking apart a string