Jan 15
Here is the code to read a text file from disk one line at a time into a string. This code ensures the file exists and properly closes the file if an exception occurs.
using System;
using System.IO;
namespace CSharp411
{
class Program
{
static void Main( string[] args )
{
string filePath = @"c:\temp\test.txt";
string line;
if (File.Exists( filePath ))
{
StreamReader file = null;
try
{
file = new StreamReader( filePath );
while ((line = file.ReadLine()) != null)
{
Console.WriteLine( line );
}
}
finally
{
if (file != null)
file.Close();
}
}
Console.ReadLine();
}
}
}
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thanks
Thank You very much.
It works perfect!
thanks , thanks it really helped me
Thanks….it works….
I need to get the line previous of the current line
there are any way to do this ???
A using() statement on the StreamReader would make this shorter and neater.
hello, i'm a student studying C# because of our final project..can anyone help me please about merging three text files which are from saved points gathered from zedgraph to be separated by comma..
for example
file1.txt contains
1
2
3
file2.txt contains
4
5
6
file3.txt contains
7
8
9
through which i need to have an output of
1 , 4 , 7
2 , 5 , 8
3 , 6 , 9
…thank you in advance.. this is very urgent and important..if you have any codes available..tnx.
@Jovit, here's a code snippet that may do what you want. You'll need to add error-handling, check to ensure the input files are the same length, strip any whitespace, etc. This also wouldn't be the best approach for very large files, but hopefully you get the idea.
string[] lines1 = File.ReadAllLines( "file1.txt" );
string[] lines2 = File.ReadAllLines( "file2.txt" );
string[] lines3 = File.ReadAllLines( "file3.txt" );
StringBuilder sb = new StringBuilder();
int count = lines1.Length;
for (int i = 0; i < count; i++)
{
string line = String.Format( "{0} , {1} , {2}", lines1[i], lines2[i], lines3[i] );
sb.AppendLine( line );
}
File.WriteAllText( "output.txt", sb.ToString() );
I have a CSV file that I open w/ C# via inline = rdr.ReadLine();While (inline != null) wrtr.writeline(blah blah….Wrtr.closeHow can I insert a new column in position number 27?
Hi Timm,
Is it possible to have this code read all line in a csv file like:
HD,dtv,bill,1234
CA,021502011,1234567890,0,12.45,,emmanuel de la cruz,las lomas,san juan,pr,00921
CA,023424555,3422354524,0,453.98,,ninette fonseca,rexile,bayamon,pr,00957
and select a field value from each line and sum it starting from the 2nd line?
Thanks in advanced.
i have a project:
" create index index on a text file, for creating an index, the user will be requried to specify the name of the file on which the index needs to be created and the name of the index file. if index has already been created on a file, a user should not be required to create it again the next time an operation is to performed on the file..
and load the files by index file
i'm learn programming in C#, 3 months ago
this project required write in windowapplication.
help me! thanks so much
IS there a way to read from a txt file line by line and string each individual line For example:
Lets say line one from the file is birthday
i want it to string birthday as birthdate then go to the next line and string as something else.
Please help!
[...] código se baseou no exemplo do colega timm, mas dei uma simplificada, deixando o código bem mais [...]