Txt File Problem C#

[ziron999]

been working on this all day and cant figure out a solution

for (int i = 0; i < NumberOfLines; i++)
{
ID[i] = tr.ReadLine();
lines = ID[i].Split(new Char[] { ' ' });
comboBox1.Items.Add(lines[0]);
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
textBox1.Text = lines[1];
}

ok problem is lines[1] only reads the end of the array and i allways get the last result no matter what i do to try to change it, but lines[0] works fine??? how can i get the textbox to only show the right thing based on what lines[0] is.
example lines[0] = 1
how can i get lines[1] to display the first line.
lines[0] = 2
how can i get lines[1] to display the 2nd line and so forth.

[ziron999]

or at least tell me how i can do this

string[,] threebythree = new string[Int16.Parse(ID[i]), Int16.Parse(lines[i])];
because even with the conversions i get
ERROR: Input string was not in a correct format.

[tlhintoq]

Not exactly sure what the goal here is... But looks like if you pick the second item from a list box (iteration 1 since it is zero indexed) that you want the second line of your file to appear in a text box. Fourth item selected in the listbox = fourth item in the text box. Is that the goal?

Both are zero-indexed. So take the .SelectedIndex value from the listbox and use that as the line number index to show in the text box.

If I have mis-understood your goal and lead you astray, my deepest apologies.

[ziron999]

sry i said it in a confusing way.

The text file has this in it:
0 string1 5
1 string2 10
2 string3 15

lines[0] is 0, 1, 2
lines[1] is string1, string2, string3
lines[2] is 5, 10, 15

ID[0] is 0 string1 5
ID[1] is 1 string2 10
ID[2} is 2 string3 15

when i try to write lines[1] to textbox1.text im getting string3 only.
i dont know the code to make it string1 first then string2, then string3.
so its reading the last array first.
i would like to make it possible to just have an array like (ID[i], lines[i]) thats what i tried doing in the reply but of course that doesnt work.

[ziron999]

i know how to write it to a text file and it works 100%

for (int i = 0; i < NumberOfLines; i++)
{
ID[i] = tr.ReadLine();
lines = ID[i].Split(new Char[] { ' ' });
comboBox1.Items.Add(lines[0]);
PrintValues(lines[1]);
}

private void PrintValues(IEnumerable myList)
{
System.Collections.IEnumerator myEnumerator = myList.GetEnumerator();
while (myEnumerator.MoveNext())
tw.Write("{0}", myEnumerator.Current);
tw.WriteLine();
}

each time i select a new ID it writes to the file with the correct lines[1] i want to do the same thing but have it just write into the textbox not a file...

[r035198x]

Well then just set it as the textbox's Text property.

[ziron999]

i've allready tried that it doesnt work correctly....thats the whole reason i made this post, if i try lines[1] in the textbox i get the last array only aka string3.

[r035198x]

i've allready tried that it doesnt work correctly....thats the whole reason i made this post, if i try lines[1] in the textbox i get the last array only aka string3.

That's because you are adding the values in a loop and at each run the previous value gets overwritten. So at the end you have only the last value set. Use a StringBuilder and append the text to a StringBuilder in the loop. You then set the value of the textbox after the loop using the string stored in the StringBuilder.

[ziron999]

ok then thats what i havnt learned how to do before how do you make a stringbuilder.

[r035198x]

ok then thats what i havnt learned how to do before how do you make a stringbuilder.

Se this article

[ziron999]

according to that a string builder can do the same thing but theres a difference in speed, i tried that and it does show all the strings together now string1string2string3 in the textbox but now i've gotta split that up...

i figured out a way to do it without the string builder though thx for your help the last post did make me realize what i did wrong.

[r035198x]

according to that a string builder can do the same thing but theres a difference in speed, i tried that and it does show all the strings together now string1string2string3 in the textbox but now i've gotta split that up...

i figured out a way to do it without the string builder though thx for your help the last post did make me realize what i did wrong.

Glad you got it.

[Plater]

You could have just been saying your loop:
mytextbox.Append(lines[1]+"\r\n");