write and read from file

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I have this code to reverse message entered from textBox and then show the result of reverse in another textBox ,how can using file the first file have the message and other file print in it the result of reverse

C#

for (int i = textBox1.Text.Length - 1; i >= 0; i--)
           {
               richTextBox2.Text += '\n';
               richTextBox1.Text += textBox1.Text[i].ToString();
           }

           for (int i = 0; i <= textBox1.Text.Length - 1; i++)
           {

               richTextBox2.Text += textBox1.Text[i].ToString();
           }

Posted 8-Jan-15 8:59am

neveen neveen

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ZurdoDev 8-Jan-15 15:43pm

What?

[no name] 8-Jan-15 15:57pm

Your question is not clear. Especially because you write about files and your code does not use filesystem.
I assume you used something like Google translate...one tip: translate the english back to your language and cross check again.
Bruno

[no name] 8-Jan-15 16:34pm

Bruno Sprecher,I write this code and use the textbox to insert the data and show it ,Idon't know how can I use file in c#,and why u assume that I used something like Google translate ):

CHill60 8-Jan-15 17:18pm

Bruno won't see your response unless you use the Reply link to his post. However his assumption probably came from the fact we couldn't really follow what you meant ... a "feature" that is common with google translate :-)

BillWoodruff 8-Jan-15 17:54pm

Are you wanting to read a file to get data for one of the TextBoxes ?

Yes, or no, please.

[no name] 9-Jan-15 2:47am

I want to use this my code but the read instead of I enter data from textbox I need read it from file and print the result in another file

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Suvendu Shekhar Giri · Answer 1 · 2015-01-08T09:51:00

Solution 1

No need to use loop. Try this

C#

char[] arr = textBox1.Text.Trim().ToCharArray();
Array.Reverse(arr);
richTextBox2.Text = new string(arr);

Hope, it helps :)

Update:
Using file read/write:

C#

string text = System.IO.File.ReadAllText(@"D:\YourFolder\file1.txt");
char[] arr = text.Trim().ToCharArray();
Array.Reverse(arr);
System.IO.File.WriteAllLines(@"D:\YourFolder\file2.txt",new string(arr));

Posted 8-Jan-15 9:51am

Suvendu Shekhar Giri

Updated 8-Jan-15 11:04am

v3

Comments

[no name] 8-Jan-15 16:49pm

where is the file??! (:

Suvendu Shekhar Giri 8-Jan-15 17:05pm

Sorry dear :( missed that thing.
Check the updated answer. Is this what you were looking for?

[no name] 9-Jan-15 8:59am

@Suvendu Shekhar,please I have error in this line System.IO.File.WriteAllLines(@"D:\YourFolder\file2.txt",new string(arr));
has some invalid arguments

[no name] 9-Jan-15 9:36am

I use the file in this way but I have problem is for ex: if I enter "send"in new1.txt the result in new2.txt reverse this okay but each char print in new line string path1 = "E:/new1.txt";
string path2 = "E:/new2.txt";

// Open the file to read from.
string[] readText = File.ReadAllLines(path1);
foreach (string s in readText)
{

char[] arr = s.Trim().ToCharArray();
Array.Reverse(arr);
foreach (char s2 in arr)
{
textBox1.Text += s2.ToString();

string appendText = s2 + Environment.NewLine;

File.AppendAllText(path2, appendText);

}
}

BillWoodruff 9-Jan-15 15:08pm

You should revise your original question to include this information.

Of course each character has a newline added: you are adding it in your loop.

You are doing this rather waste-of-time exercise about as inefficiently as possible.