Comments by Member 11561872 (Top 42 by date)

So i read somewhere else on here you can append to string by using sting += appendage so i tried that. The code is updated now but it just returns "Line 000 = System.String[] System.String[]..." indefinitely

ok so I figured out how to get rid of the error. I simply added the line "DNA = "";". But now it won't show the results. It merely adds "Line 001 =" to the list box. Would it reset DNA back to "" after the loop completes?

i updated the question to show it

ok. How would i do that? I've actually been trying while loops. My current code has this:

public partial class frmDNA : Form
{
int x = 1;
String Path;
StreamReader DNAFile = new StreamReader("/documents/visual studio 2013/Projects/DNA/DNA.txt");
int Index;
int Lines = File.ReadLines("/documents/visual studio 2013/Projects/DNA/DNA.txt").Count();
public frmDNA()
{
InitializeComponent();
}

private void btnPrint_Click(object sender, EventArgs e)
{
String DNA;
string[ ] DNAarray = new string[Lines];
int Begin, end;
Begin = 0;
end = 4;
while (Index < DNAarray.Length && !DNAFile.EndOfStream)
{
DNAarray[Index] = DNAFile.ReadToEnd();
while (Begin < end)
{
DNA = "Lines " + x + " = " + DNAarray[Begin];
Begin++;
}
end += 5;
x++;
Index++;
lstOut.Items.Add(DNA);
}



}
}

But the line lstOut.Items.Add(DNA); says DNA is unassigned.

but the problem is the file is organized as such:
ABC
DEF
GHI
JKL
MNO
PQR
STU
VWX
YZA

And can be in different formats in other files the user may try. I need the output to be
Line 001: ABC DEF GHI JKL MNO and so on

I tried a test to make sure the file opened and the path was fine. But I want the path to be changeable in the code. I created a string called Path then when they click open I assign the path of the opened file to the string Path. Next I need to assign that string to the streamreader. But it says it can't assign it to a no static variable in a class setting. I need it to be versatile cause the file needs to be opened and manipulated with other buttons also. Pretty much so they can open one file to this list and change files and open to another list that analyzes it differently.

Text

Then I mean read. I need to take lines of a text file and output them to a listbox. I can't do actual code atm as I'm away from the computer but I have the file opened and the data put into a simple string array. But I don't know how to make it so each line reads specific text then has a specific number of groups after.

It's windows but it's a virtual boot on a Mac. The path works though. When I change it to "Path" it says it can't set it equal to the non static variable in a class setting.

aren't they the same thing?

if i change the DNAFile to equal "new StreamReader(Path); i get errors

Ok so i did that. But now i can't assign the streamreader equal to the string. currently it looks like this:
public partial class
{
String Path;
StreamReader DNAFile = new StreamReader("/documents/visual studio 2013/Projects/DNA/DNA.txt");
}

And under private voice btn_click:
{
if (openDNAfile.ShowDialog() == DialogResult.OK)
{
try
{
Path = openDNAfile.FileName;
DNAFile = new StreamReader(Path);

}
catch
{

}
}
}

if i change the DNAFile to equal "new StreamReader(Path); i get errors

Ok so i did that. But now i can't assign the streamreader equal to the string. currently it looks like this:
public partial class
{
String Path;
StreamReader DNAFile = new StreamReader("/documents/visual studio 2013/Projects/DNA/DNA.txt");
}

And under private voice btn_click:
{
if (openDNAfile.ShowDialog() == DialogResult.OK)
{
try
{
Path = openDNAfile.FileName;
DNAFile = new StreamReader(Path);

}
catch
{

}
}
}

Thanks. And +5 for the .AddRange. Actually fixed another problem i ran into once i got the file to load. First it would output "String Array[ ]" for each item in the file. but i took out the for each statement and just added the array and it worked fine!

Actually the below solution worked with enetering "E&xit" into the text property. However i do not know what registering the event does. I just did what i could find based on online research.

I was not aware I could simply use "&" in designer mode to do this. I worked though. Thanks!

ok, so my instructor went over timers today. We created a timer named "timer1" with the toolbox.
i used int time as my counter. Under btnNewProblem i had:
timer1.enabled = true;
and under btnCheckAnswer i had:
timer1.enabled = false;
time = 0;
then by double clicking the timer on the form i created a tick event handler under which i had:
time++;
if (time > 1)
{
lblTimer.text = time.ToString() + "Seconds";
}
else
{
lblTimer.text = time.ToString() + "second";

and i actually understand what happening. The timers ticks trigger everything under it to happen. int time is originally set to 0, but is raised by 1 each time the timer ticks, which is set to an interval of 1000 milliseconds (1 second). So when btnNewProblem is clicked, the timer starts ticking, changing the label until btnCheckAnswer is clicked, stopping the timer and thus stopping the ticks. And by setting int time to 0 after stopping you reset your timer without changing it until the new problem button is pressed. ^.^

Sorry, I was doing this at work and my shift ended. It's bedtime now but I'll compile it in the morning and let you know! Thanks!

Declare an integer set it = to itself + 1 each time the handler was called between the 2 button presses?

Nothing with the timer. It revolves around the user answering math problems. When the user submits their answer (The second button click) it puts the elapsed time into the label

Would that just be timer.start( ); ?

For which i do thank you. I don't quite understand yet but i am learning!

Ok so how is that done?

I can't use a stopwatch for this assignment

Looking back at the link i can see what's happening better but i still don't see what's happening. What i see is this:
aTimer is the name of the timer
2000 is the interval in milliseconds. its really just 2 seconds.
the elapsed time property is equal to itself plus the OnTimedEvent method. Right?
But when looking at the event method it doesn't have a value to add. it just writes to the console. So where does it get a value?

Right but we haven't really gone over them. I got them by double clicking the button on the forms GUI. We haven't discussed the parts or how to create them.

ok, so i'm reading event handlers in my book. (I've already looked for timers. they don't even show up in the index). Im guessing it would be useful because the timer needs measured in seconds and it would be called each second independently of when the buttons clicked. So when either of the buttons are clicked would i be able to stop the timer at the current value and call that value specifically? If so then it would be as easy as subtracting the start value from the end value. Or am i thinking to much?

I was actually. He hasn't really touched on timers too much and i can't find anything online that explains the difference between the 2

To be honest I don't know. But I don't think this is going in the right direction. We haven't even gone over event-handler-methods yet.

I still don't understand what I'm doing wrong. Based on everything we've been taught and all the research I've done my problem is occurring in the line:
time += Convert.ToInt32(Timer.Interval) / 1000;
But i don't know what to change. I would imagine I need to change Interval but anything i change it to breaks the code with the error "Input string was not in a correct format."

I checked that page already, but i don't see were it outputs it to a label? it outputs to the console with a separate event but i can't have that.

Ok, First I'm sorry I'm not picking this up right away. This is actually for a introduction class so I'm just a beginner with coding.
Second, if i set x = rnd.Next(0,13); under btnNewProblem like in your example, it will change private x = -1; so that when i write z = x+y; in btnNewProblem, if x=5 and y=6 z should equal 11. So when i write under btnAnswerCheck to compare z to int Answer it should compare 11 to the user input correct? Was that followable?

Actually looking closer, I have noticed some things that may not work. I need it to be under the btnNewProblem method. This is because it needs to create a new set of random variables each time the button is clicked.

Thanks OriginalGriff. I can still set x, y, and z to the random variables right? they don't need to be -1? i.e. private int x = rnd.Next();?

It forces me to create a new class when i create a new event handler. Im using the variable in the event created for the btnNewProblem, and then i need to fetch it and use it in the event for the btnCheckAnswer. I updated with an example of my code.

I attemped to clarify it and added a snippet of code from my project. All editing was done after the "Edit" line.