Save text file with a new name without changing the contents

and then it jumps to Catch (Exception ex) block.. Why?

is it because I'm passing (file). What is wrong in my code?

string[] files = Files;
            if (Files.Length > 0)
            {
                foreach (string file in files)
                {
                    try
                    {
   var list = new List();

                        using (var reader = new StreamReader(file))
                            {
                                for (int i = 0; i < 26; i++)
                                {
                                    list.Add(reader.ReadLine());
                                }
                            }

 private string[] SelectFiles(string oldPath)
        {
            string file = openFileDialog1.FileName;
            openFileDialog1.InitialDirectory = oldPath;
  
 openFileDialog1.Filter = "Txt files*.txt";
            openFileDialog1.Multiselect = true;
            openFileDialog1.RestoreDirectory = true;

            System.Windows.Forms.DialogResult dr = openFileDialog1.ShowDialog();
            if (dr == DialogResult.OK)
            {
                foreach (string fileName in openFileDialog1.SafeFileNames)
                {
                    textBox1.Text += fileName + Environment.NewLine;
                }
            }
            Files = Directory.GetFiles(oldPath,"*.txt"); // it gets all files from the directory of type Txt.
            return Files;

}

string file = openFileDialog1.FileName;

if (dr == DialogResult.OK)

{

for each (string filename in openFileDialog1.SafeFileNames)

{

OpenFile.Txt += filename+ Environment.NewLine;

}

{

  try

    {

     var list = new List<string>();

     using (var reader = new StreamReader(file))

     {

         for (int i = 0; I < 26; i++)

                {                             
                

                list.Add(reader.ReadLine());

                }

      }

    string newFileName = string.Concat(newPath,

{

  try

    {

     var list = new List<string>();

     using (var reader = new StreamReader(file))

     {

         for (int i = 0; I < 26; i++)

                {                             
                

                list.Add(reader.ReadLine());

                }

      }

    string newFileName = string.Concat(newPath,

 This code works fine, but the problem is with the new file(as you noticed), the file will contain only 26 lines because of the list parameter that I passed to WriteAllLines method. So, Do you think there is alternative solution to move or copy the old file to the new location  and reads only first 26 lines to get the new file's name? I mean the name of the new file will be changed based on the lines that I will pass from my list which contains 26 lines but the content of the new file will remain the same.

 Hello  again Vulpes.

Based on your assumption, the code works perfectly.  However, I think I didn't
give the right clarification for the  problem.

My text file contains several lines and each line expresses  the relative
value. Suppose I have (n) numbers of text files in my folder and  I need to
dynamically let me code to read those files at one go. For  each file it
will go to line 3, line 4 and line five to read the  correspondence values to
each line and push them in the file name in order to  save the file.

For example: one of the original file called:  "File1.txt",  //  where file1.txt is one of (n) files.txt.

and  my code finds the values :VAL1, VAL2, VAL3 in the lines 3,4 and 5 from  this
file. In this case the new file name would be: File1-VAL1-VAL2-VAL3.txt  and it
will be saved in the same or other directory in my computer.   This should
be done to all of the files in this folder at one go without  changing the
entire contents of the original/old and the new files.

So  basically my code will work like copying this file to another or same location  and give a new file name by pushing/adding the three values to the old file name  by separating the values by any separator.



I managed to write  the following methods, but still incomplete:

//Manual  process:

public void RenameFileAndCopy() 

         {

         string oldPath = @"C:\TXT_files\File1.txt";  //suppose it's  one file out
of 70 files.

          string newpath = @"C:\TXT_UpdatedFiles\";

         string newFileName = "new  file name"; //  I gave the new file name (but
not based on the values on the  lines. 

         FileInfo f1 = new FileInfo(oldPath);  

            if(f1.Exists)

              {

                  if(!Directory.Exists(newpath))

                  {

                      Directory.CreateDirectory(newpath);
                 }

                  f1.CopyTo(string.Format("{0}{1}{2}",  newpath, newFileName,  f1.Extension));

                  MessageBox.Show("Creation  completed");

              }

         }

 public void RenameFile() 

         {

      DirectoryInfo DI = new DirectoryInfo("C:\\TXT_Files"); 

     FileInfo [] FI = DI.GetFiles("*.txt");

             foreach (FileInfo file in FI)

              {

                 // Do the renaming here

                 File.Move(file.FullName,
Path.Combine(file.DirectoryName, "1" + file.Name));

             }

public void ReadNumberOfLines()

         {

   //Load my text file(s)

   TextReader tr = new StreamReader("File1.txt");

    //No of lines to be  loaded

   int NumberOfLines = 70; // it will read from  the start to end of the file.

 //Array for each line:

 string[] LinesList = new string[NumberOfLines];

//Read the number of lines and add them into  array

   for (int i=1; i< NumberOfLines;i++)

             {

                 LinesList[i] = tr.ReadLine();

             }

//This will write the 3^rd, 4^th and  5^th lines into the
old file name: Example: Default1-VA1-VA2-Val3.txt

?  ??????????????