Programming Forums > Application Development > C#

csrocker101 · Mar 31st, 2008, 5:13 AM

Hey everyone I have made an arraylist that takes a stream of information from a string I have made that contains some IP addresses. However I am having a problem assigning the information correctly to my ArrayList. Each IP address is approxiamtely 13 characters long. Here is my code..

(Toggle Plain Text)

string IPAdressesofSystems = service.GetNearbySystems(host);
            ArrayList newList = new ArrayList();

            for (int i = 0; i < IPAdressesofSystems.Length; i++)
            {
                newList.Add(IPAdressesofSystems.Substring(i, 13));
            }

I am well aware it's because of the "i" index I am using in my Substring method is starting at the next incremented index. For example it starts out doing "index[0] = 150.542.234.23 index[1] = 45.543.245.21 index[2] = 4.342.233.29..etc.." because the i is incrementing by one which is making the starting index go up by one everytime. How would I make it so it records all 13 characters of Each IP adress?

Jabo · Mar 31st, 2008, 6:33 AM

why would you not split your string into the array? I don't know how getnearbysystems populates the string, but it should separate the ip addresses somehow, and you can use that delimiter to split your string into usable array entries

Quote:

Originally Posted by csrocker101

(Toggle Plain Text)

string IPAdressesofSystems = service.GetNearbySystems(host);
            ArrayList newList = new ArrayList();

            for (int i = 0; i < IPAdressesofSystems.Length; i++)
            {
                newList.Add(IPAdressesofSystems.Substring(i, 13));
            }

I am well aware it's because of the "i" index I am using in my Substring method is starting at the next incremented index.

What this code does is what you said. If you use the string.split method to separate your string, it will look for whatever delimiter you specify.

I'm not familiar with C#, but in VB it would look something like this:

 vb Syntax (Toggle Plain Text) 
Dim str1 As String = "xyz,pbb7,rx78"
Dim str2() As String
str2 = str1.Split(",")
For x As Integer = 0 To str2.Length - 1
        MsgBox(str2(x), MsgBoxStyle.Information, "Array")
Next
Dim str1 As String = "xyz,pbb7,rx78"
Dim str2() As String
str2 = str1.Split(",")
For x As Integer = 0 To str2.Length - 1
        MsgBox(str2(x), MsgBoxStyle.Information, "Array")
Next

This way, it don't matter what the size of each individual string is. The code I posted displays each array element in a new message box.

Jabo · Mar 31st, 2008, 7:25 AM

I tried to convert this to C# but I don't know enough about it to really do it.

 c# Syntax (Toggle Plain Text) 
private void button1_Click(object sender, EventArgs e)
        {
            string str1 = "xyz,pbb7,rx78";
            string[] str2=new string[]{str1.Split",");
            for (int p = 0; p < str2.Length; p++)
            {
                label1.Text = str2[p]+"\n";
            }
        }
private void button1_Click(object sender, EventArgs e)
        {
            string str1 = "xyz,pbb7,rx78";
            string[] str2=new string[]{str1.Split",");
            for (int p = 0; p < str2.Length; p++)
            {
                label1.Text = str2[p]+"\n";
            }
        }

I get all kinds of errors about my strings and arrays, but maybe it'll help you out at least a little bit.

Kilo · Mar 31st, 2008, 7:03 PM

Use this code with your variables.... remember to replace the comma in the split call with your delimiter.

 C# Syntax (Toggle Plain Text) 
            string str1 = "xyz,pbb7,rx78";
            string[] str2 = str1.Split(',');
            for (int i = 0; i < str2.Length; i++)
            {
                textbox1.Text = str2[i]+"\n";
            }
            string str1 = "xyz,pbb7,rx78";
            string[] str2 = str1.Split(',');
            for (int i = 0; i < str2.Length; i++)
            {
                textbox1.Text = str2[i]+"\n";
            }

Arla · Apr 2nd, 2008, 11:04 AM

Or just use i=i+13 in your loop?

If you KNOW each IP is 13 characters, and you don't have a delimiter...

Mar 31st, 2008, 5:13 AM	#1
csrocker101 Programmer Join Date: Dec 2006 Posts: 49 Rep Power: 0	Help Indexing ArrayList Hey everyone I have made an arraylist that takes a stream of information from a string I have made that contains some IP addresses. However I am having a problem assigning the information correctly to my ArrayList. Each IP address is approxiamtely 13 characters long. Here is my code.. (Toggle Plain Text) string IPAdressesofSystems = service.GetNearbySystems(host); ArrayList newList = new ArrayList(); for (int i = 0; i < IPAdressesofSystems.Length; i++) { newList.Add(IPAdressesofSystems.Substring(i, 13)); } string IPAdressesofSystems = service.GetNearbySystems(host); ArrayList newList = new ArrayList(); for (int i = 0; i < IPAdressesofSystems.Length; i++) { newList.Add(IPAdressesofSystems.Substring(i, 13)); } I am well aware it's because of the "i" index I am using in my Substring method is starting at the next incremented index. For example it starts out doing "index[0] = 150.542.234.23 index[1] = 45.543.245.21 index[2] = 4.342.233.29..etc.." because the i is incrementing by one which is making the starting index go up by one everytime. How would I make it so it records all 13 characters of Each IP adress?

Mar 31st, 2008, 7:25 AM	#3
Jabo Not a user? Join Date: Sep 2007 Posts: 272 Rep Power: 2	Re: Help Indexing ArrayList I tried to convert this to C# but I don't know enough about it to really do it. c# Syntax (Toggle Plain Text) private void button1_Click(object sender, EventArgs e) { string str1 = "xyz,pbb7,rx78"; string[] str2=new string[]{str1.Split","); for (int p = 0; p < str2.Length; p++) { label1.Text = str2[p]+"\n"; } } private void button1_Click(object sender, EventArgs e) { string str1 = "xyz,pbb7,rx78"; string[] str2=new string[]{str1.Split","); for (int p = 0; p < str2.Length; p++) { label1.Text = str2[p]+"\n"; } } I get all kinds of errors about my strings and arrays, but maybe it'll help you out at least a little bit.

Mar 31st, 2008, 7:03 PM	#4
Kilo Expert Programmer Join Date: Nov 2005 Location: In Pink Clam? Posts: 542 Rep Power: 0	Re: Help Indexing ArrayList Use this code with your variables.... remember to replace the comma in the split call with your delimiter. C# Syntax (Toggle Plain Text) string str1 = "xyz,pbb7,rx78"; string[] str2 = str1.Split(','); for (int i = 0; i < str2.Length; i++) { textbox1.Text = str2[i]+"\n"; } string str1 = "xyz,pbb7,rx78"; string[] str2 = str1.Split(','); for (int i = 0; i < str2.Length; i++) { textbox1.Text = str2[i]+"\n"; } __________________ "When in Rome, Do as the Romans Do" "Beauty is in the eye of the BEER holder" "Save your breath your going to need it for your blow up doll later" SearchLores.org

Apr 2nd, 2008, 11:04 AM	#5
Arla Hobbyist Programmer Join Date: Mar 2005 Posts: 227 Rep Power: 4	Re: Help Indexing ArrayList Or just use i=i+13 in your loop? If you KNOW each IP is 13 characters, and you don't have a delimiter...

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Programming Forums > Application Development > C#

Help Indexing ArrayList