I'm currently reading the content of a .srt like this:
var assetURL = "some url";
var textFromFile = (new WebClient()).DownloadString(assetURL);
However, I need to be able to loop through all lines, like this:
string[] text = File.ReadAllLines(#"subs.srt");
foreach (string line in text)
{
// Do something
}
I can't do it like that because File.ReadAllLines does not support URIs. Any idea how I can accomplish this?
You can always split a string by Environment.NewLine with String.Split:
string[] lines = textFromFile.Split(new []{ Environment.NewLine }, StringSplitOptions.None);
You can use StringReader:
using (var sr = new StringReader(textFromFile))
{
string line;
while ((line = sr.ReadLine()) != null)
{
// sth with a line
}
}
Why it could be better than splitting by Environment.NewLine? It will handle both cases - when the new line character is \r\n or \n.
Related
I need to read all of .txt file and save data to array/list. File looks like this:
row11 row12 row13
row21 row22 row23
row31 row32 row33
between strings are only spaces.
Next I will insert data from array/list<> to mysql, but it is not problem.
Thanks.
EDIT: I need insert 3 columns to mysql like .txt file.
Use String.Split(Char[], StringSplitOptions) where the first parameter specifies that you want to split your string using spaces and tabs, and the second parameter specifies that you ignore empty entries (for cases where there are multiple spaces between entries)
Use this code:
var lines = System.IO.File.ReadAllLines(#"D:\test.txt");
var data = new List<List<string>>();
foreach (var line in lines)
{
var split = line.Split(new[]{' ', '\t'}, StringSplitOptions.RemoveEmptyEntries);
data.Add(split.ToList());
}
You can use File.ReadLines() to read the lines from the file, and then Regex.Split() to split each line into multiple strings:
static IEnumerable<String> SplitLines(string path, string splitPattern)
{
foreach (string line in File.ReadAllLines(path))
foreach (string part in Regex.Split(line, splitPattern))
yield return part;
}
To split by white space, you can use the regex pattern \s+:
var individualStrings = SplitLines(#"C:\path\to\file.txt", #"\s+");
You can use the ToList() extension method to convert it to a list:
List<string> individualStrings = SplitLines(#"D:\test\rows.txt", #"\s+").ToList();
As long as there are never spaces in the "values", then a simple line-by line parser will work.
A simple example
var reader = new StreamReader(filePath);
var resultList = new List<List<string>>();
string line;
while ((line = reader.ReadLine()) != null)
{
var currentValues = new List<string>();
// You can also use a StringBuilder
string currentValue = String.Empty;
foreach (char c in line)
{
if (Char.IsWhiteSpace(c))
{
if (currentValue.Length > 0)
{
currentValues.Add(currentValue);
currentValue = String.Empty;
}
continue;
}
currentValue += c;
}
resultList.Add(currentValues);
}
Here's a nifty one-liner based off Amadeusz's answer:
var lines = File.ReadAllLines(fileName).Select(l => l.Split(new[] { ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries)).SelectMany(words => words);
I have seen many examples that show StreamReader taking the arugment "Properties.Resources.someTextFile, and apparently they work great. However, in .net 4.5 I still get:
//while not end of file, read lines of file and split into array
string myFile = Properties.Resources.data;
string line;
StreamReader reader = new StreamReader(myFile);
while ((line = reader.ReadLine()) != null)
{
string[] array = line.Split('#');
string tickerSymbol = array[0];
string regPattern = array[1];
....
So, what am I doing wrong?
By accessing the data text file resource through Properties.Resources the resulting variable myFile should contain the string contents of the file.
string myFile = Properties.Resources.data;
var lines = myFile.Split(new[] { Environment.NewLine }, StringSplitOptions.None);
foreach(var line in lines)
{
// Process each line...
}
I am trying to get a list of words (below) to be put into an array. I want each word to be in it's own index.
Here is my code that I have so far.
string badWordsFilePath = openFileDialog2.FileName.ToString();
StreamReader sr = new StreamReader(badWordsFilePath);
string line = sr.ReadToEnd();
string[] badWordsLine = line.Split(' ');
int BadWordArrayCount = 0;
foreach (string word in badWordsLine)
{
badWords[BadWordArrayCount] = word;
BadWordArrayCount = BadWordArrayCount + 1;
}
int test = badWords.Length;
MessageBox.Show("Words have been imported!");
BadWordsImported = true;
Here is the list of words I want to import.
label
invoice
post
document
postal
calculations
copy
fedex
statement
financial
dhl
usps
8
notification
n
irs
ups
no
delivery
ticket
If someone could give me an example of how to get this to work, that would be a huge help.
Simplified code:
string badWordsFilePath = openFileDialog2.FileName.ToString();
string[] badWords = File.ReadAllLines(badWordsFilePath);
int test = badWords.Length;
MessageBox.Show("Words have been imported!");
BadWordsImported = true;
If every word starts on a new line then you do not need to create a for loop. The Split method will convert to an array for you.
string badWordsFilePath = openFileDialog2.FileName.ToString();
StreamReader sr = new StreamReader(badWordsFilePath);
string line = sr.ReadToEnd();
string[] badWords = line.Split('\n');
You are splitting on space, but there is a newline between each word. Split on newline instead:
string[] badWordsLine = line.Split(new string[]{ Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
Then you have to create the array to put the words in:
badWords = new string[badWordsLine.Length];
However, to loop through a string array just to copy the strings to a string array seems pointless. Just assing the string array to the variable. Also, you forgot to close the stream reader, which is best taken care of with a using block:
string badWordsFilePath = openFileDialog2.FileName.ToString();
string line;
using (StreamReader sr = new StreamReader(badWordsFilePath)) {}
line = sr.ReadToEnd();
}
badWords = line.Split(new string[]{ Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
int test = badWords.Length;
MessageBox.Show("Words have been imported!");
BadWordsImported = true;
Maybe try this modification? It allows on splitting on various white spaces.
string badWordsFilePath = openFileDialog2.FileName.ToString();
StreamReader sr = new StreamReader(badWordsFilePath);
string line = sr.ReadToEnd();
string[] badWordsLine = line.Split(new string[] {" ", "\t", "\r\n"}, StringSplitOptions.RemoveEmptyEntries);
int BadWordArrayCount = 0;
foreach (string word in badWordsLine)
{
badWords[BadWordArrayCount] = word;
BadWordArrayCount = BadWordArrayCount + 1;
}
int test = badWords.Length;
MessageBox.Show("Words have been imported!");
BadWordsImported = true;
Do you have to use a StreamReader? If you do not have to, then this code is clearer (in my opinion).
string text = File.ReadAllText(badWordsFilePath);
string[] words = Regex.Split(text, #"\s+");
If you're 100% certain that each word is on its own line and there are no empty lines, this might be overkill; and the File.ReadAllLines suggestion by #Ulugbek Umirov is simpler.
So, I know my headline is a bit confusing, I will explain.
My code looks like this:
string filename = "C:\\C#\\maplist.txt"; // please put the text file path.
string filename2 = "C:\\C#\\zemaplist.txt";
string map;
StreamReader sr = new StreamReader(filename);
StreamWriter sw = new StreamWriter(filename2);
List<string> maps = new List<string> { };
while ((map = sr.ReadLine()) != null)
{
maps.Add(map);
}
sr.Close();
for (int i = 0; i < maps.Count; i++)
{
Console.WriteLine(maps[i]);
sw.WriteLine(maps[i]);
}
sw.Close();
and what i need to do is when the code read a new line, in my line there is
"Hey,Hey"
I want to split the , from each other so I can take both of them as other parameters, so that the first Hey will be added to maps and the other hey will be maps2,
How can I do that?
You can use Split() function to Split the given String based on delimiter.
Try This:
while ((map = sr.ReadLine()) != null)
{
maps.Add(map.Split(',')[0].Trim());
maps2.Add(map.Split(',')[1].Trim());
}
Simple Code:
using System.IO;
string filename = "C:\\C#\\maplist.txt"; // please put the text file path.
string filename2 = "C:\\C#\\zemaplist.txt";
string map;
StreamWriter sw = new StreamWriter(filename2);
List<string> maps = new List<string> { };
List<string> maps2 = new List<string> { };
String [] allLines = File.ReadAllLines(filename);
foreach(String line in allLines)
{
maps.Add(line.Split(',')[0].Trim());
maps2.Add(line.Split(',')[1].Trim());
}
for (int i = 0; i < maps.Count; i++)
{
Console.WriteLine(maps[i]);
sw.WriteLine(maps[i]);
}
sw.Close();
Solution 2:
String mapItem1="";
String mapItem2="";
if(maps.Count == maps2.Count)
{
for(int i=0;i<maps.Count;i++)
{
mapItem1=maps[i];
mapItem2=maps2[i];
}
}
while ((map = sr.ReadLine()) != null)
{
string[] split = map.Split(',');
//First Hey would be split[0], second Hey would be split[1]
maps.Add(split[0].Trim());
maps2.Add(split[1].Trim());
}
The Split method should help you out with that.
If you want to trim leading whitespace characters, you can use the .Trim() method on a string.
Use Split().
string heys = "Hey,Hey";
string[] splitArray = heys.Split(',');
Then you have:
splitArray[0] = "Hey";
splitArray[1] = "Hey";
Why even bother reading line by line? Read the entire file, replace the new line chars for a "," (to prevent last and first elements from different lines to be treated as one), and loop through a clean string.
string fileContent = Regex.Replace(File.ReadAllText("test.txt"), #"\r", ",");
List<string> mapList = new List<string>();
foreach (string map in Regex.Split(fileContent.Replace(#"\s+", ""), ","))
{
mapList.Add(map.Trim());
}
Am trying to read a text file in asp.net where the file is not in a particular format, so i just wanted to read that file up to special characters(*) and skip the rest.
In general it is of the format
00000 AFCX TY88YYY
12366 FTTT TY88YYY
** File Description
// This is so and so Description
** End of Description
12345 TYUI TY88YYY
45677 RERY TY88YYY
string file = "TextFile1.txt";
List<string> lines = new List<string>();
using (StreamReader r = new StreamReader(f))
{
string line;
while ((line = r.ReadLine()) != null && !line.StartsWith("*"))
{
lines.Add(line);
}
}
This will give you a list of all the lines except those beginning with *:
string[] yourFileContents = File.ReadAllLines(filePath);
List<string> contentsWithoutAsterix =
yourFileContents.Where(line => line.First() != '*').ToList();
PS (edit):
If you just want lines until the first occurence of *, do this instead:
List<string> contentsWithoutAsterix =
yourFileContents.TakeWhile(line => line.First() != '*').ToList();