Split the .txt file based on line count in C sharp

Yes, the code should work just as well in a Windows Forms application as a Console application because no UI elements have been used.

You could generalize it by reading the path of the file to split up from one textbox and the partition size from another textbox.

Hi Vulpes,

I have changed this in windows application.

string[] lines = File.ReadAllLines("C:\\Users\\VG\\Desktop\\nexgen.txt");

                int partitionSize = 2;

                int partitionNumber = (lines.Length - 1) / partitionSize;
                int partitionRemainder = (lines.Length - 1) % partitionSize;
                string[] partitionLines = new string[partitionSize + 1];
                partitionLines[0] = lines[0]; // copy heading 

                int part;
 
                for(part = 1; part <= partitionNumber; part++)
                {
                    int startIndex = (part - 1) * partitionSize + 1;
                   
                    Array.Copy(lines, startIndex, partitionLines, 1, partitionSize);

                    string fileName = "D:\\gopi" + part.ToString() + ".txt";

                    File.WriteAllLines(fileName, partitionLines);
               
                }

                if (partitionRemainder > 0)

                {

                    int startIndex = (part - 1) * partitionSize + 1;
         
                    partitionLines = new string[partitionRemainder + 1];
         
                    partitionLines[0] = lines[0];
         
                    Array.Copy(lines, startIndex, partitionLines, 1, partitionRemainder);
         
                    string fileName = "D:\\gopi" + part.ToString() + ".txt";

                    File.WriteAllLines(fileName, partitionLines );
 
                }

Hi Vulpes,

Your initial code is working fine. I tried this in windows application instead of console application.

I am very sorry to say this.

Thank you very much for your clarification. Could you please let me know this for windows application.

Well, the program's working fine with my own test file so I think the partition files must be there somewhere.

If you've put gopi.txt in the root directory of your D: drive, then try writing the partition files to the same drive so that you know exactly where they should be. So this line:

   string fileName = "gopi" + part.ToString() + ".txt";

should be changed to this:

   string fileName = "D:\\gopi" + part.ToString() + ".txt";

Yes, the Partition did not create.

That line is reading the existing file (I've called it gopi.txt but you may have called it something else) containing a header plus 1000 lines.

In the same directory, you should have 10 more files containing the header and 100 lines each.

These 'partition' files will be named gopi1.txt, gopi2.txt etc.

When you say the file did not save, do you mean that the partition files haven't been created at all or that they have been created but don't contain what they should?

Hi Vulpes,

The file did not save, Even I changed the file path. Below is the path.

string[] lines = File.ReadAllLines("D:\\gopi.txt");

Please help me.

Hi Vulpes,

While i put the breakpoints to all line i could saw the file has been split. But i dont know where it was saved. Could you please let me know the split-up file location.