The question that I have is regarding converting the process of reading lines from a text file into an array instead of just reading it.
The error in my codes appear at string[] lines = File.ReadLines("c:\\file.txt"); with cannot implicitly convert....
Can someone please advise on the codes to save the results in an array format? I've placed the ReadAllLines code which is able to save the results in an array too. Thanks!
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.IO;
namespace Testing
{
class Analysis
{
static void Main()
{
string[] lines = File.ReadLines("c:\\file.txt");
foreach (string r in lines)
{
Console.WriteLine("-- {0}", r);
}
// Keep the console window open in debug mode.
Console.WriteLine("Press any key to exit.");
System.Console.ReadKey();
}
}
}
ReadAllLines Codes:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using System.IO;
namespace Testing
{
class ReadFromFile
{
static void Main()
{
string[] lines = System.IO.File.ReadAllLines
(#"C:\Users\Public\TestFolder\WriteLines2.txt");
System.Console.WriteLine("Contents of writeLines2.txt =:");
foreach (string line in lines)
{
Console.WriteLine("\t" + line);
}
// Keep the console window open in debug mode.
Console.WriteLine("Press any key to exit.");
System.Console.ReadKey();
}
}
}
File.ReadLines() returns an object of type System.Collections.Generic.IEnumerable<String>
File.ReadAllLines() returns an array of strings.
If you want to use an array of strings you need to call the correct function.
You could use Jim solution, just use ReadAllLines() or you could change your return type.
This would also work:
System.Collections.Generic.IEnumerable<String> lines = File.ReadLines("c:\\file.txt");
You can use any generic collection which implements IEnumerable, such as IList<String>.
string[] lines = File.ReadLines("c:\\file.txt").ToArray();
Although one wonders why you'll want to do that when ReadAllLines works just fine.
Or perhaps you just want to enumerate with the return value of File.ReadLines:
var lines = File.ReadLines("c:\\file.txt");
foreach (var line in lines)
{
Console.WriteLine("\t" + line);
}
Change string[] lines = File.ReadLines("c:\\file.txt"); to IEnumerable<string> lines = File.ReadLines("c:\\file.txt");
The rest of your code should work fine.
using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
namespace FileReader
{
class Program
{
static void Main(string[] args)
{
var lines = File.ReadAllLines("D:/Text.txt").ToList();
if(lines != null && lines.Count > 0)
{
foreach(var line in lines)
{
Console.WriteLine(line);
}
}
Console.ReadKey();
}
}
}
Related
I have many files in folder. and whenever there is any update in any file I Receive an event for that in my windows service application.
And I am looking for something by which I can validate the file with specific pattern. If it matches then only that file should be processed or else it should be ignored.
Something like this
if(File.Matches("genprice*.xml"))
{
DoSomething();
}
genprice20212604.xml
genprice20212704.xml
price20212604.xml
genprice20212704.txt
From above only #1 and #2 should be processed others should be ignored.
Your can try with regular expressions:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Text.RegularExpressions;
namespace ConsoleAppRegex
{
class Program
{
static void Main(string[] args)
{
string[] fileNames = new string[] { "genprice20212604.xml",
"genprice20212704.xml",
"price20212604.xml",
"genprice20212704.txt"};
Regex re = new Regex(#"genprice[^\.]*.xml");
foreach (string fileName in fileNames)
{
if (re.Match(fileName).Success)
{
Console.WriteLine(fileName);
}
}
Console.ReadLine();
}
}
}
I suggest to use Regex:
using System.Text.RegularExpressions;
using System.IO;
var reg = new Regex(#"genprice\d{8}$");
var fileNamesFromFolder = Direcotory.GetFiles(" #Folder´s path ", "*.xml")
.Where(path => reg.IsMatch(Path.GetFileNameWithoutExtension(path)))
.Select(Folder=>
Path.GetFileNameWithoutExtension(Folder));
foreach (var file in fileNamesFromFolder )
{
//Do something...
}
This question already has answers here:
How can I split a string with a string delimiter? [duplicate]
(7 answers)
Closed 5 years ago.
I am making a project, But i need to be able to split 1 row of text into 2 strings.
How would i go about doing this?
using System;
using System.Collections.Generic;
using System.Threading;
using System.Linq;
using System.IO;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
Console.Title = "Stinger";
Console.Write("Configuration FIle.... ");
Thread.Sleep(1000);
if (System.IO.File.Exists(#"C:\Stinger\Configuration\config.cfg"))
{
Console.Write("Found");
Thread.Sleep(1000);
Console.WriteLine("\r\n");
Console.WriteLine("--Configuration--");
string[] readText = File.ReadAllLines(#"C:\Stinger\Configuration\config.cfg");
foreach (string s in readText)
{
Console.WriteLine(s);
Thread.Sleep(1000);
}
}
else // Configuration File Else Statement
{
Console.WriteLine("Missing");
Thread.Sleep(4000);
}
}
}
And here is my Config Contents
fullscreen 1
I want to be able to make "fullscreen" and "1" part of the row 2 strings.
I've done continuous googling and reading articles on how to split.
But it's not making any sense to me.
Any help?
This is a simple string.Split and is actually very straightforward and fundamental.
Assuming this is the code where you are getting fullscreen 1 from, you can do something like this.
string[] readText = File.ReadAllLines(#"C:\Stinger\Configuration\config.cfg");
foreach (string s in readText)
{
string[] split= s.Split(" ");
Console.WriteLine(split[0]+" "+split[1]);
Thread.Sleep(1000);
}
The Console.WriteLine will print your expected output.
I'm trying to take html code from a page on the internet, save it as a text file, then read the text file find a part of the code, save it as a var and out put it to the console in c#.
this is the code i'm trying but it doesn't work
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication3
{
class StringSearch
{
static void Main()
{
string HTML = System.IO.File.ReadAllText(#"C:\Users\gamer\Desktop\HTML\code test.txt");
string sPattern = "code";
foreach (string s in HTML)
{
System.Console.Write("{0,24}", s);
if (System.Text.RegularExpressions.Regex.IsMatch(s, sPattern, System.Text.RegularExpressions.RegexOptions.IgnoreCase))
{
System.Console.WriteLine(" (match for '{0}' found)", sPattern);
}
else
{
System.Console.WriteLine();
}
}
System.Console.WriteLine("Press any key to exit.");
System.Console.ReadKey();
}
}
}
P.S if you know a way to capture a pages HTML code/part of a pages HTML code and out put it that would be even better
Thanks
I'm trying to get a simple text parser class to work in VS2015. I received the class code and built a basic Console Application, added the class Cawk and tried to compile/run it.
The main error that I get is
Argument 1: cannot convert from 'string' to 'System.IO.StreamReader'
It's clear that I can't figure out how to pass a filename through Main to Cawk. How do I give it an argument of a filename?
Any help or pointers would be appreciated.
My Program.cs:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication3
{
class Program
{
static void Main()
{
string input = #"c:\temp\test.txt";
Cawk.Execute(input);
}
}
}
Snippet of My Cawk.cs:
using System;
using System.Collections.Generic;
using System.IO;
namespace ConsoleApplication3
{
public static class Cawk
{
public static IEnumerable<Dictionary<string, object>> Execute(StreamReader input)
{
Dictionary<string, object> row = new Dictionary<string, object>();
string line;
//string[] lines = File.ReadAllLines(path);
//read all rows
while ((line = input.ReadLine()) != null)
{
Execute accepts a StreamReader not a string.
Cawk.Execute(new StreamReader(#"c:\temp\test.txt"))
However, you should close the stream after you are done with it.
using (var sr = new StreamReader(#"c:\temp\test.txt"))
{
Cawk.Execute(sr);
}
something like:
var sr = new System.IO.StreamReader(#"c:\temp\test.txt");
Cawk.Execute(sr);
Simply use the File class from the System.IO namespace.
Cawk.Execute(File.OpenText(#"c:\temp\test.txt"));
Like this:
string input = #"c:\temp\test.txt";
Cawk.Execute(new System.IO.StreamReader(input));
You can put using System.IO; to the top like the rest of the usings, then you don't have to write it out later.
I googled and found the solution at MSDN.
// Compose a string that consists of three lines.
string lines = "First line.\r\nSecond line.\r\nThird line.";
// Write the string to a file.
System.IO.StreamWriter file = new System.IO.StreamWriter("c:\\test.txt");
file.WriteLine(lines);
file.Close();
How to extend the lines to complex content which including some natural C# code lines.
eg. I want to write the information below to my test.cs file.
Why?
I am parsing a XML schema with C# Console Application. And i want to generate the Console Result to a .cs file during the compiler time.
using System;
using System.Collections.Generic;
using System.Text;
namespace CommonDef
{
public class CCODEData
{
public int iCodeId;
public string sCode;
public CODEDType cType;
public int iOccures;
}
[Description("CodeType for XML schema.")]
public enum CODEDType
{
cString = 1,
cInt = 2,
cBoolean = 3,
}
thank you.
If your source code is hardcoded as in your sample, you could use a C# literal string:
string lines =
#"using System;
using System.Collections.Generic;
using System.Text;
namespace CommonDef
..."
Anyway in such cases it is a better idea (more readable and maintainable) to have the whole text contents into a text file as an embedded resource in your assembly, then read it using GetManifestResourceStream.
(I'm assuming you're trying to build up the result programmatically - if you genuinely have hard-coded data, you could use Konamiman's approach; I agree that using an embedded resource file would be better than a huge verbatim string literal.)
In your case I would suggest not trying to build up the whole file into a single string. Instead, use WriteLine repeatedly:
using (TextWriter writer = File.CreateText("foo.cs"))
{
foreach (string usingDirective in usingDirectives)
{
writer.WriteLine("using {0};", usingDirective);
}
writer.WriteLine();
writer.WriteLine("namespace {0}", targetNamespace);
// etc
}
You may wish to write a helper type to allow simple indentation etc.
If these suggestions don't help, please give more details of your situation.
I know an answer has already been accepted but why not use an XSLT applied to the XML instead? this would mean that you could easily generate c#, vb.net, .net without having to recompile the app.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace FileHandling
{
class Class1
{
static void Main()
{
Console.WriteLine("Enter data");
ConsoleKeyInfo k;
//Console.WriteLine(k.KeyChar + ", " + k.Key + ", " + k.Modifiers );
string str="";
char ch;
while (true)
{
k = Console.ReadKey();
if ((k.Modifiers == ConsoleModifiers.Control) && (k.KeyChar == 23))
{
Console.WriteLine("\b");
break;
}
if (k.Key == ConsoleKey.Enter)
{
Console.WriteLine("");
str += "\n";
}
ch = Convert.ToChar(k.KeyChar);
str += ch.ToString();
}
Console.WriteLine(str);
Console.Read();
}
}
}