Develop Reference

How combine two different Paths

I have two different Paths:
C:\Project\v4.0\Tool\Custom\CustomCompanyNames\Template\file\file.xml
C:\Destination\New\Place\Bin\Debug\output
I need a way two get values from two different paths
Expected Path:
C:\Destination\New\Place\Bin\Debug\output\CustomCompanyNames\file\file.xml
How can i solve it ?
Custom is a fix folder
All directories after Customs have different names
My Solution bad programmed:
Custom ist the first path
Destination the second path
private void test()
{
string result = destination;
string[] custom = customs.Split('\\');
foreach (var s in custom)
{
if(s.Contains("custom") || result.Contains("custom"))
{
if(s.Contains("templates")) break;
result = Path.Combine(result, s);
}
}
}

Instead of Splitting the path use IndexOf to find the Custom part and then Substring from it.
string path1 = #"C:\Project\v4.0\Tool\Custom\CustomCompanyNames\Template\file\file.xml";
string path2 = #"C:\Destination\New\Place\Bin\Debug\output";
string splitter = #"Custom\";
string desiredSection = path1.Substring(path1.IndexOf(splitter) + splitter.Length);
string output = Path.Combine(path2, desiredSection);

C# removing last delimited field from a string split

I am a beginner c# programmer and just had a quick question on an application I am building. My process reads in multiple files with the purpose of stripping out specific records based on a 1 or 0 pipe delimited field in the text file. It is the last delimited field in the file actually. If it is a 0, I write it to a temp file (which will later replace the original that I read), if it is anything else I do not. And not to try to get it too confusing but there are two types of records in the file, a header row, and then that is followed by a few supp rows. The header row is the only one that has the flag, so as you can tell from below, if the bool gets set to a good record by being 0, it writes the header record along with all supp records below it until it hits a bad one in which case it will negate writing them until the next good one.
However, what I am trying to do now (and would like to know the easiest way), is how to write the header record without the last pipe delimited field (IE the flag). Since it should always be the last 2 characters of the row (for example "0|" or "1|" as the preceeding pipe is needed), should it be a string trim on my inputrecord string? Is there an easier way? Is there a way to do a split on the record but not actually include the last field (in this case, field 36)? Any advice would be appreciated. Thank you,
static void Main(string[] args)
{
try
{
string executionDirectory = RemoveFlaggedRecords.Properties.Settings.Default.executionDirectory;
string workDirectory = RemoveFlaggedRecords.Properties.Settings.Default.workingDirectory;
string[] files = Directory.GetFiles(executionDirectory, "FilePrefix*");
foreach (string file in files)
{
string tempFile = Path.Combine(workDirectory,Path.GetFileName(file));
using (StreamReader sr = new StreamReader(file,Encoding.Default))
{
StreamWriter sw = new StreamWriter(tempFile);
string inputRecord = sr.ReadLine();
bool goodRecord = false;
bool isheaderRecord = false;
while (inputRecord != null)
{
string[] fields = inputRecord.Split('|');
if (fields[0].ToString().ToUpper() == "HEADER")
{
goodRecord = Convert.ToInt32(fields[36]) == 0;
isheaderRecord = true;
}
if (goodRecord == true && isheaderRecord == true)
{
// I'm not sure what to do here to write the string without the 36th field***
}
else if (goodRecord == true)
{
sw.WriteLine(inputRecord);
}
inputRecord = sr.ReadLine();
}
sr.Close();
sw.Close();
sw = null;
}
}
string[] newFiles = Directory.GetFiles(workDirectory, "fileprefix*");
foreach (string file in newFiles)
{
string tempFile = Path.Combine(workDirectory, Path.GetFileName(file));
string destFile = Path.Combine(executionDirectory, Path.GetFileName(file));
File.Copy(tempFile, destFile, true);
if (File.Exists(destFile))
{
File.Delete(tempFile);
}
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
finally
{
// not done
}
}

One way you could do this - if what you want at that point in the code is to always write all but the final element in your string[] - is construct a for loop that terminates before the last item:
for (int i = 0; i < fields.Length - 1; i++)
{
// write your field here
}
This is assuming that you want to write each field individually, and that you want to iterate through fields in the first place. If all you want to do is just write a single string to a single line without using a loop, you could do this:
var truncatedFields = fields.Take(fields.Length - 1);
And then just write the truncatedFields string[] as you see fit. One way you could accomplish all this in a single line might look like so:
sw.WriteLine(String.Join("|", fields.Take(fields.Length - 1)));

goodRecord = fields.Last().Trim() == "0";
if (inputRecord.Contains("|") string outputRecord = inputRecord.Substring(1, inputRecord.LastIndexOf("|"));

string manipulation using Directory.GetFiles()

i am assigning images[] with an array that holds images file names with full path of given Directory.
string[] images = DirLoad.FileNamesArray(
IO.Loaders.PathType.full,
IO.Loaders.FileExtension.jpg
);
...now, that images[] stores all the file names i need, as I had to use the full path to get it done,
using Directory.GetFiles()
Next action requires it as a local file name.
(each is then passed as string type parameter to another method)
so my question is :
How can i omit first part - HttpRuntime.AppDomainAppPath ...if it's same in every element of array ?
this is usage example, the string is currentDir i need to trim from each element in images[]
public class IO
{
public class Loaders
{
readonly string currentDir = HttpRuntime.AppDomainAppPath;
public string selecedDirName { get; set; }
/// <summary>
/// assign The Loaders.selectedDir First before calling
/// </summary>
/// <param name="foldertoLoad"></param>
/// <returns></returns>
public enum PathType
{
full, local
}
public enum FileExtension
{
jpg,png,txt,xml,htm,js,aspx,css
}
public string[] FileNamesArray(PathType SelectedPathMode, FileExtension selectedfileType)
{
string thisFolder = "";
string thatFileType= string.Format("*.{0}",selectedfileType.ToString());
switch (SelectedPathMode)
{
case PathType.full:
thisFolder = Path.Combine(currentDir, selecedDirName);
break;
case PathType.local:
thisFolder = selecedDirName;
break;
default:
break;
}
string[] foundArr = Directory.GetFiles(thisFolder, thatFileType);
return foundArr;
}
}
}
Update , this is what i've tried
string fileName;
string[] images = DirLoad.FilesArray(IO.Loaders.PathType.full, IO.Loaders.FileExtention.jpg);
foreach (var currImage in images)
{
int startingAt = DirLoad.currentDir.Length ;
int finalPoint = currImage.Length - startingAt;
fileName = new String(currImage.ToCharArray(startingAt, finalPoint));
baseStyle.Add(string.Format("{0}url({1}) {2}", BackGroundCssProp, fileName, imageProps));
}
return baseStyle.ToArray();

Still I fail to understand, what you're trying to accomplish from the beginning to the end, but..If you are having an array of full paths and you need to get only filenames from these paths, you can do the following:
Actually files may contain random, absolutely different paths, but according to what I have caught from the question, et it be:
var files = Directory.GetFiles(#"path");
Then you may use Path.GetFileName Method to retrieve only filename from these paths, through a simple Enumerable.Select LINQ-statement:
var fileNamesOnly = files.Select(f => Path.GetFileName(f));

I am not entirely sure what you exactly need. For your sentence:
the string is currentDir i need to trim from each element in images[]
You can try the following using LINQ:
string currDir = "SomeString";
string[] images = new string[] { "SomeStringabc1.jpg", "SomeStringabc2.jpg", "SomeStringabc3.jpg", "abc.jpg" };
string[] newImages = images.Select(r => r.StartsWith(currDir)
? r.Replace(currDir, "") : r)
.ToArray();
Or using string.TrimStart
string[] newImages = images.Select(r => r.TrimStart(currDir.ToCharArray())).ToArray();

sorry but it is not clear to me... if you want only the filename from whole path then you can simply use Split for it, split the whole path with special character and use last array element.
once you will get all the path in your "images" array you can try below code.
for example:-
for(i=0;i<images.length;i++)
{
string [] cuttofilename=images[i].split('\');
string filename=cuttofilename[cuttofilename.lentgh-1];
}

In C# how can I prepare a string to be valid for windows directory name

I am writing a C# program which reads certain tags from files and based on tag values it creates a directory structure.
Now there could be anything in those tags,
If the tag name is not suitable for a directory name I have to prepare it to make it suitable by replacing those characters with anything suitable. So that directory creation does not fail.
I was using following code but I realised this is not enough..
path = path.replace("/","-");
path = path.replace("\\","-");
please advise what's the best way to do it..
thanks,

Import System.IO namespace and for path use
Path.GetInvalidPathChars
and for filename use
Path.GetInvalidFileNameChars
For Eg
string filename = "salmnas dlajhdla kjha;dmas'lkasn";
foreach (char c in Path.GetInvalidFileNameChars())
filename = filename.Replace(System.Char.ToString(c), "");
foreach (char c in Path.GetInvalidPathChars())
filename = filename.Replace(System.Char.ToString(c), "");
Then u can use Path.Combine to add tags to create a path
string mypath = Path.Combine(#"C:\", "First_Tag", "Second_Tag");
//return C:\First_Tag\Second_Tag

You can use the full list of invalid characters here to handle the replacement as desired. These are available directly via the Path.GetInvalidFileNameChars and Path.GetInvalidPathChars methods.

The characters you must now use are: ? < > | : \ / * "
string PathFix(string path)
{
List<string> _forbiddenChars = new List<string>();
_forbiddenChars.Add("?");
_forbiddenChars.Add("<");
_forbiddenChars.Add(">");
_forbiddenChars.Add(":");
_forbiddenChars.Add("|");
_forbiddenChars.Add("\\");
_forbiddenChars.Add("/");
_forbiddenChars.Add("*");
_forbiddenChars.Add("\"");
for (int i = 0; i < _forbiddenChars.Count; i++)
{
path = path.Replace(_forbiddenChars[i], "");
}
return path;
}
Tip: You can't include double-quote ("), but you can include 2 quotes ('').
In this case:
string PathFix(string path)
{
List<string> _forbiddenChars = new List<string>();
_forbiddenChars.Add("?");
_forbiddenChars.Add("<");
_forbiddenChars.Add(">");
_forbiddenChars.Add(":");
_forbiddenChars.Add("|");
_forbiddenChars.Add("\\");
_forbiddenChars.Add("/");
_forbiddenChars.Add("*");
//_forbiddenChars.Add("\""); Do not delete the double-quote character, so we could replace it with 2 quotes (before the return).
for (int i = 0; i < _forbiddenChars.Count; i++)
{
path = path.Replace(_forbiddenChars[i], "");
}
path = path.Replace("\"", "''"); //Replacement here
return path;
}
You'll of course use only one of those (or combine them to one function with a bool parameter for replacing the quote, if needed)

The correct answer of Nikhil Agrawal has some syntax errors.
Just for the reference, here is a compiling version:
public static string MakeValidFolderNameSimple(string folderName)
{
if (string.IsNullOrEmpty(folderName)) return folderName;
foreach (var c in System.IO.Path.GetInvalidFileNameChars())
folderName = folderName.Replace(c.ToString(), string.Empty);
foreach (var c in System.IO.Path.GetInvalidPathChars())
folderName = folderName.Replace(c.ToString(), string.Empty);
return folderName;
}

Searching strings in txt file

I have a .txt file with a list of 174 different strings. Each string has an unique identifier.
For example:
123|this data is variable|
456|this data is variable|
789|so is this|
etc..
I wish to write a programe in C# that will read the .txt file and display only one of the 174 strings if I specify the ID of the string I want. This is because in the file I have all the data is variable so only the ID can be used to pull the string. So instead of ending up with the example about I get just one line.
eg just
123|this data is variable|
I seem to be able to write a programe that will pull just the ID from the .txt file and not the entire string or a program that mearly reads the whole file and displays it. But am yet to wirte on that does exactly what I need. HELP!
Well the actual string i get out from the txt file has no '|' they were just in the example. An example of the real string would be: 0111111(0010101) where the data in the brackets is variable. The brackets dont exsist in the real string either.
namespace String_reader
{
class Program
{
static void Main(string[] args)
{
String filepath = #"C:\my file name here";
string line;
if(File.Exists(filepath))
{
StreamReader file = null;
try
{
file = new StreamReader(filepath);
while ((line = file.ReadLine()) !=null)
{
string regMatch = "ID number here"; //this is where it all falls apart.
Regex.IsMatch (line, regMatch);
Console.WriteLine (line);// When program is run it just displays the whole .txt file
}
}
}
finally{
if (file !=null)
file.Close();
}
}
Console.ReadLine();
}
}
}

Use a Regex. Something along the lines of Regex.Match("|"+inputString+"|",#"\|[ ]*\d+\|(.+?)\|").Groups[1].Value
Oh, I almost forgot; you'll need to substitute the d+ for the actual index you want. Right now, that'll just get you the first one.
The "|" before and after the input string makes sure both the index and the value are enclosed in a | for all elements, including the first and last. There's ways of doing a Regex without it, but IMHO they just make your regex more complicated, and less readable.

Assuming you have path and id.
Console.WriteLine(File.ReadAllLines(path).Where(l => l.StartsWith(id + "|")).FirstOrDefault());

Use ReadLines to get a string array of lines then string split on the |

You could use Regex.Split method

FileInfo info = new FileInfo("filename.txt");
String[] lines = info.OpenText().ReadToEnd().Split(' ');
foreach(String line in lines)
{
int id = Convert.ToInt32(line.Split('|')[0]);
string text = Convert.ToInt32(line.Split('|')[1]);
}

Read the data into a string
Split the string on "|"
Read the items 2 by 2: key:value,key:value,...
Add them to a dictionary
Now you can easily find your string with dictionary[key].

first load the hole file to a string.
then try this:
string s = "123|this data is variable| 456|this data is also variable| 789|so is this|";
int index = s.IndexOf("123", 0);
string temp = s.Substring(index,s.Length-index);
string[] splitStr = temp.Split('|');
Console.WriteLine(splitStr[1]);
hope this is what you are looking for.

private static IEnumerable<string> ReadLines(string fspec)
{
using (var reader = new StreamReader(new FileStream(fspec, FileMode.Open, FileAccess.Read, FileShare.Read)))
{
while (!reader.EndOfStream)
yield return reader.ReadLine();
}
}
var dict = ReadLines("input.txt")
.Select(s =>
{
var split = s.Split("|".ToArray(), 2);
return new {Id = Int32.Parse(split[0]), Text = split[1]};
})
.ToDictionary(kv => kv.Id, kv => kv.Text);
Please note that with .NET 4.0 you don't need the ReadLines function, because there is ReadLines
You can now work with that as any dictionary:
Console.WriteLine(dict[12]);
Console.WriteLine(dict[999]);
No error handling here, please add your own

You can use Split method to divide the entire text into parts sepparated by '|'. Then all even elements will correspond to numbers odd elements - to strings.
StreamReader sr = new StreamReader(filename);
string text = sr.ReadToEnd();
string[] data = text.Split('|');
Then convert certain data elements to numbers and strings, i.e. int[] IDs and string[] Strs. Find the index of the given ID with idx = Array.FindIndex(IDs, ID.Equals) and the corresponding string will be Strs[idx]
List <int> IDs;
List <string> Strs;
for (int i = 0; i < data.Length - 1; i += 2)
{
IDs.Add(int.Parse(data[i]));
Strs.Add(data[i + 1]);
}
idx = Array.FindIndex(IDs, ID.Equals); // we get ID from input
answer = Strs[idx];