Compare and update file contents in folders (source,target)

TAN WhoAMI

I have 2 directories (source, target) which contain multiple files with the same filenames, e.g 001.txt, 002.txt, 003.txt... and so on

for example on the source directory with this 001.txt file

[ZERO_POINT_004]

X=0.000000

Y=52000.000000

Z=50827.000000

ZD=38530.000000

[ZERO_POINT_005]

X=-38000.000000

Y=52000.000000

Z=50827.000000

ZD=38530.000000

[ZERO_POINT_006]

X=-76000.000000

Y=52000.000000

Z=50827.000000

ZD=38530.000000

[ZERO_POINT_LEFT_001]

X=0.000000

Y=0.000000

Z=50827.000000

ZD=38530.000000

[ZERO_POINT_LEFT_002]

X=-38000.000000

Y=0.000000

Z=50827.000000

ZD=38530.000000

[ZERO_POINT_LEFT_003]

X=-76000.000000

Y=0.000000

Z=50827.000000

ZD=38530.000000

and on the target directory with this 001.txt file

[ZERO_POINT_004]

X=0.000000

Y=52000.000000

Z=50827.000000

ZD=38530.000000

[ZERO_POINT_005]

X=-38000.000000

Y=52000.000000

Z=50827.000000

ZD=38530.000000

[ZERO_POINT_006]

X=-76000.000000

Y=52000.000000

Z=50827.000000

ZD=38530.000000

Notice that the file in the target directory contain information similar to that from the source directory, but less those highlighted in red. How do I copy the contents difference (in Red color) to the file in the target directory? The contents difference copied over must be on the same lines as what the file in the source directory.

4 Replies

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Vulpes11y ago
Accepted answer
OK, I think I'm clear what the problem is now :)

Try something like this.

I've assumed that each section will consist of the header plus 4 more lines:

using System;
using System.IO;
using System.Collections.Generic;

class Program
{
static void Main()
{
string sourceDir = @"c:\whatever1"; // insert source directory path
string targetDir = @"c:\whatever2"; // insert target directory path
var headers = new List();
var lines = new string[5];
string line = null;

foreach(string sourcePath in Directory.GetFiles(sourceDir, "*.txt"))
{
string fileName = Path.GetFileName(sourcePath);
string targetPath = targetDir + "\\" + fileName;
if (!File.Exists(targetPath)) continue;

// get a list of section headers from target file
headers.Clear();

using (var sr = new StreamReader(targetPath))
{
while((line = sr.ReadLine()) != null)
{
if(line.Length > 0 && line[0] == '[') headers.Add(line);
}
}

// now look for non-existing headers in source file
using (var sr = new StreamReader(sourcePath))
{
while((line = sr.ReadLine()) != null)
{
if(line.Length > 0 && line[0] == '[' && !headers.Contains(line))
{
lines[0] = line;
for(int i = 1; i <= 4; i++) lines[i] = sr.ReadLine();
File.AppendAllLines(targetPath, lines);
}
}
}
}
}
}
0
TAN WhoAMI11y ago
I would try out your solutions, thank you very much Vulpes
0
TAN WhoAMI11y ago
yes Vulpes...you did miss something here, which I did not explain fully...

Step 1:
Copy all files from source directory#1 to target directory -- completed.

Step 2:
Conversion factor needed for files on target directory: e.g -- completed.
[ZERO_POINT_004]
X=0.000000
Y=52000.000000
Z=50827.000000
ZD=38530.000000
becomes
[ZERO_POINT_004]
X=0.000000
Y=26000.000000
Z=25413.500000
ZD=38530.000000

Step 3 is what I am stuck:
Now, there is another source directory#2 which is similar to source directory#1, but contains something new. Example, it contains
[ZERO_POINT_LEFT_001]
X=0.000000
Y=0.000000
Z=50827.000000
ZD=38530.000000
[ZERO_POINT_LEFT_002]
X=-38000.000000
Y=0.000000
Z=50827.000000
ZD=38530.000000
[ZERO_POINT_LEFT_003]
X=-76000.000000
Y=0.000000
Z=50827.000000
ZD=38530.000000

I need those new contents (highlighted in red) from source directory#2 to be copied to the files in the target directory. The files in source directory#2 and target directory are having the same filenames.

0
Vulpes11y ago
I'm probably missing something here but, if you want similarly named files in both the source and target directories to have the same content, couldn't you just copy them over from the source directory and overwrite the existing files in the target directory?
0