open text file

[Bryan Thatcher]

Can someone post an example of opening a text file from c#. Thanks.

[sinc]

Here's one way to read a text file one line at a time:

using System;
using System.IO;

namespace Sample
{
    class Class1
    {
        void readFile(string filename)
        {
            string line;
            if (File.Exists(filename))
            {
                try
                {
                    StreamReader reader = new StreamReader(filename);
                    while ((line = reader.ReadLine()) != null)
                    {
                        // do something with input line
                    }
                }
                catch (Exception ex)
                {
                    // failure during read
                }
            }
        }
    }
}

[Madhuri]

You can use the using statement that automaltially manages clsing of file and meneory space ..

try
{
using( StreamReader reader = new StreamReader(filename))
{
while ((line = reader.ReadLine()) != null)
{
// do something with input line
}
}
}

[BlackBox]

I know this thread is from a little while ago... Just in case the OP (or someone else) wanted to actually open a text file, as in with Notepad, here's an example which includes a sub-function which accepts a single argument:

using Autodesk.AutoCAD.Runtime;

public class FOO
{
    public static void _OpenFile(string filePath)
    {
        System.Diagnostics.Process.Start(filePath); //<-- This is what opens the .TXT file
    }

    [CommandMethod("OpenFile")]
    public void OpenFile()
    {
        _OpenFile("<FilePath>\<FileName>.txt");
    }
}

Tested successfully using Civil 3D 2011