CODEWITHSUNDEEP
c#.netwinforms
Simon Gamlieli
Simon Gamlieli

Reputation: 129

Getting exception when trying to delete a line from a text file. How can i solve it?

In the top of form1:

StreamWriter recentfiles;
string[] lines;
string line = null;
int line_number = 0;
string RecentFiles = "";

In the constructor:

RecentFiles = @"e:\RecentFiles.txt";
if (!File.Exists(RecentFiles))
{
    recentfiles = new StreamWriter(RecentFiles);
    recentfiles.Close();
}
else
{
    lines = File.ReadAllLines(RecentFiles);
    items = File
            .ReadLines(@"e:\RecentFiles.txt")
            .Select(line => new ToolStripMenuItem()
            {
              Text = line
            })
            .ToArray();
}
for (int i = 0; i < items.Length; i++)
{
    if (!File.Exists(items[i].Text))
    {
        using (StreamReader reader = new StreamReader(RecentFiles))
        {
            using (StreamWriter writer = new StreamWriter(RecentFiles))
            {
                while ((line = reader.ReadLine()) != null)
                {
                    line_number++;

                    if (line_number == i)
                        continue;

                    writer.WriteLine(line);
                }
            }
        }
    }
}

In the text file RecentFiles for example in the first line I have:

d:\test.txt

In the second line:

e:\test\test.txt

What I want to do is that if one of the files in the text file is not exist remove it delete it from the RecentFiles.txt

But I'm getting exception on the line:

using (StreamWriter writer = new StreamWriter(RecentFiles))

The process cannot access the file 'e:\RecentFiles.txt' because it is being used by another process

How can i solve it ?

Upvotes: 1

Views: 70

Answers (2)

Enigmativity
Enigmativity

Reputation: 117084

It seems to me that this does what you need:

File.WriteAllLines(RecentFiles,
    File.ReadAllLines(RecentFiles)
        .Where(f => File.Exists(f)));

Upvotes: 0

Geoduck
Geoduck

Reputation: 9001

just make it better:

lines = File.ReadAllLines(RecentFiles);
List< ToolStripMenuItem > items = new List< ToolStripMenuItem >();
using (StreamWriter writer = new StreamWriter(RecentFiles))
{
    for (int i = 0; i < lines.Length; i++)
    {
        if (File.Exists(lines[i])) {
            writer.WriteLine(lines[i]);
            items.Add(new ToolStripMenuItem()
              {
                Text = lines[i]
              });
        }
    }
}

Upvotes: 2

Related Questions