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

debugcn Published at Dev

Simon Gamlieli

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 ?

Garr Godfrey

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]
              });
        }
    }
}

Collected from the Internet

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