iam creating an app for a handheld with windows embedded handheld 6.5, iam stuck with reading the content of text file and loading into a string. the file is tab delimeted with 3 columns (barcode, desc, price).the code will be executed on form load, i have written the below using c# on vb2005 releasing on windows 6 classic emulator, but the streamreader is always null. i have written the below please any advices, i appreciate the help!

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;

private void Form1_Load(object sender, EventArgs e)
{
    string fileloc = "fileexample.txt";               
    StreamReader sr = new StreamReader(fileloc);
    string s = sr.ReadToEnd();                   
}

CodePudding user response：

OK:

How can I read all text when ReadAllText is unavailable?

The compact-framework edition does not implement it. The .net version, however, is simply implemented like this:

public static class File
{
    public static String ReadAllText(String path)
    {
        using (var sr = new StreamReader(path, Encoding.UTF8))
        {
            return sr.ReadToEnd();
        }
    }
}

Note the second argument to StreamReader: Encoding.UTF8.

See also:

Compact Framework: A problem with reading a file

Windows CE doesn't have the concept of "current directory". The OS tries to open \list.txt when passing "list.txt". You always have to specify the full path to the file. ...

In full framework I use:

string dir = Path.GetDirectory(Assembly.GetExecutingAssembly().Location);
string filename = Path.Combine(dir, "list.txt");
StreamReader str = new StreamReader(filename);

STRONG SUGGESTIONS:

1. Specify an encoding (e.g. UTF8)
2. Set a breakpoint in this method and single-step through your code.

CodePudding user response：

Try use

File.ReadAllText("Full File Path");

and use the Full file path like C:\fileexample.txt