C# Discussion Boards - CodeProject

Re: Passing a SQL 2005 vBinary document object (a Word document) to an instance of Word.Document.

20-Oct-08 6:53

No problem at all. You don't have to be sorry if your problem got solved.

If you feel afterwards that your post or my reply was somehow 'bad' or that something should have been figured out earlier, it's only part of the learning process and it goes both ways.

Mika

The need to optimize rises from a bad design.

My articles[^]

dunloe20-Oct-08 7:24

dunloe

20-Oct-08 7:24

I am an existentialist that happens to be a programmer. There is no right or wrong. In our realm just syntax, and the sharing of that syntax.

All the best,

dunloe

how to classify the content of textbox

lolla200619-Oct-08 8:47

19-Oct-08 8:47

hi...i wrote this code to read the input of textbox, and i wanna to classify each input to compute the given expression i want to store each operand in an index of arrayList ... as example:
suppose the input is : 22+99*7
then when i display the contents of the arrayKist results should be :
22
+
99
*

this is my Code please i realyy need help i stuck here: Confused | :confused:

private void equal_Click(object sender, EventArgs e)
        {
            ArrayList equation = new ArrayList();
            string input = textInput.Text;
            char[] Buffer = input.ToCharArray();
            string tempString="";
            try
            {
                FileStream historyFile = new FileStream("History.txt", FileMode.Append, FileAccess.Write);
                StreamWriter sw = new StreamWriter(historyFile);
                DateTime log = new DateTime();
                sw.WriteLine(input + ": @ time " + log.TimeOfDay + "@ date " + log.Date);
                sw.Close();
                historyFile.Close();
            }
            catch( FileNotFoundException l)
            {
                MessageBox.Show("Logs File Not Found !!","Error Message");
                FileStream exeptionFile = new FileStream("Errors.txt", FileMode.Append, FileAccess.Write);
                StreamWriter sw = new StreamWriter(exeptionFile);
                sw.WriteLine(l.ToString ());
                sw.Close();
                exeptionFile.Close();
            }           
            for (int i = 0; i < Buffer.Length; i++)
            {
                if (char.IsDigit(Buffer[i]))
                {
                    tempString += Buffer[i];
                    for (int j = i + 1; j < Buffer.Length; j++)
                    {
                        if(char.IsDigit (Buffer[j]))
                            tempString += Buffer[j];
                    }
                    //tempString += Buffer[i];
                    
                }                   
                else if (char.IsLetter (Buffer[i]))
                {
                    tempString += Buffer[i];
                    for (int j = i + 1; j < Buffer.Length; j++)
                    {
                        if (char.IsLetter(Buffer[j]))
                            tempString += Buffer[j];
                    }

                }
                else if (char.IsSymbol (Buffer[i]))
                {
                    tempString += Buffer[i];
                    for (int j = i + 1; j < Buffer.Length; j++)
                    {
                        if (char.IsSymbol(Buffer[j]))
                            tempString += Buffer[j];
                    }

                }
                equation.Add(tempString);      
               
            }
            for (int t=0; t<equation.Count ;t++)
                MessageBox.Show(equation[t].ToString());
            
            


            

        }

while(1)
System.out.println("I love Palestine ");

Wendelius19-Oct-08 9:07

19-Oct-08 9:07

You didn't quite indicate your exact problem.

However, perhaps you could use String.Split (for known operators) to find each operand and then test that operand is valid for example using Decimal.TryParse.

Hope this helps,

Mika

The need to optimize rises from a bad design.

My articles[^]

lolla200619-Oct-08 10:46

19-Oct-08 10:46

thanks mika...
my exact problem is that i cant get the operands exactly as extra operands are stored such the instead of storin just the 22 it stores also 2 and insted of 222 it stores two other operands 22 and 2 ... have i explained well??!!

there isnt just one operand to split around its all operands(mathmatical operations)...

what do think now?

thnx in advance..

while(1)
System.out.println("I love Palestine ");

Guffa19-Oct-08 15:33

Guffa

19-Oct-08 15:33

I can usually reduce posted code quite a bit, but this time it really got a lot smaller. Smile | :)

string[] equation = Regex.Split(textInput.Text, "([+-*/])");

Despite everything, the person most likely to be fooling you next is yourself.

lolla200622-Oct-08 7:14

22-Oct-08 7:14

ok gofa...thanks

but it gives compiler error on the word: Regex
Error 1 The name 'Regex' does not exist in the current context

while(1)
System.out.println("I love Palestine ");

Guffa22-Oct-08 22:05

Guffa

22-Oct-08 22:05

Add a using System.Text.RegularExpressions; to the code, or specify the full namespace of the class as System.Text.RegularExpressions.Regex.

Despite everything, the person most likely to be fooling you next is yourself.

Wendelius19-Oct-08 18:00

19-Oct-08 18:00

You can split all at once since the parameter for Split is an array. For example:

string [] split = words.Split(new Char [] {'+', '-', '*', '/'});

or you can use Regex as Guffa suggested.

However I thought that you don't want split with all operations at once since then you may have a problem in knowing what were the original operations.

The need to optimize rises from a bad design.

My articles[^]

lolla200622-Oct-08 7:17

22-Oct-08 7:17

hi...thanks alot
but i really have problem in determining what the operation order was

also..i tried the codeline you wrote but it gives a compiler erorr on the words:
Error 1 The name 'words' does not exist in the current context

i appraciate your help Rose | [Rose]

while(1)
System.out.println("I love Palestine ");

Wendelius22-Oct-08 8:46

Simple case statement looking for Enter key

22-Oct-08 8:46

For the compiler error: the words was only a variable name. In your case use the variable where you have the original string you want to split.

And then the logic (since this seems to be a homework assignment I won't go to full blown solution). One (brute force) way to handle this could be:
- create a class that holds information about the input string, number and operation (three separate properties)
- create a generic list for this type where you will store individual 'elements'
- break the operations one by one into parts and add them to the list to the place where you parsed them.

Something like following (let's say the class name is Operation:

First you have only one Operation instance in the list, which has three properties
1: text: 22+35-76+28*5, number: empty, operation: empty

if you split the text using plus, you could then have three instances on the list
1: text: empty, number: 22 operation: +
2: text: 35-76, number: empty, operation: +
3: text: 28*5, number: empty, operation: empty

then if you split using minus you could have four instances (note the order)
1: text: empty, number: 22 operation: +
2: text: empty, number: 35, operation: -
3: text: empty, number: 76, operation: +
4: text: 28*5, number: empty, operation: empty

and so on.

This won't entirely solve the issue you have, but perhaps gets you forward.

The need to optimize rises from a bad design.

My articles[^]

Brad Wick19-Oct-08 8:22

Brad Wick

19-Oct-08 8:22

I have the following case statement where I am looking for a enter key being pushed to be in the suffix. I need this to be a enter but I can not seem to figure out how to add the char(13) as I can not make it into a string and fit into the const setting. Can someone help me with this?

<code>
string keyAscii = e.KeyChar.ToString();
const string Prefix = "|~";
const string Sufix = "";

switch(keyAscii)
{
    case Prefix:
        // Code
        break;
    case Sufix:
        //Code
        break;
    default:
        //Code
        break;
}
</code>

Re: Simple case statement looking for Enter key

Wendelius19-Oct-08 9:14