如何在Windows窗体C＃的资源​​文件夹中编辑文本文件

Question

I am trying to Edit a text file which is consist in resources folder of window form project. C#.

I am using this code but it is not writing over text file. No errors come from this

using (System.IO.StreamWriter file = new System.IO.StreamWriter(Namespace.Properties.Resources.textfile))
{
    for (int i = 0; i < res2.Count(); i++)
    {
        label3.Text = "Updating ... ";
        label3.Visible = true;
        label3.Refresh();

        file.WriteLine("asdasD");
    }
    file.Close();
}

Answer 1

As @LarsTech states in this answer , what you are trying to do is not recommended . Resource files are not meant to be written to--they should only be read from. If you want a place to put files, put them somewhere like Environment.SpecialFolders .

You could also use the AppData folder on the user's computer, which is typically used for exactly what you are trying to achieve:

string fileName = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "textfile.txt");    
using (System.IO.StreamWriter file = new System.IO.StreamWriter(fileName))
{
    //if the file doesn't exist, create it
    if (!File.Exists(fileName))
        File.Create(fileName);

    for (int i = 0; i < res2.Count(); i++)
    {
        label3.Text = "Updating ... ";
        label3.Visible = true;
        label3.Refresh();
        file.WriteLine("asdasD");
    }
}

As you can see, I removed the file.Close() since it isn't necessary if you are using the using block. You can do this if you are using a member which implements the IDisposable interface, which StreamWriter does.

This should take care of everything for you. You won't have to create any files or worry about where they are.

Answer 2

I am able to write and then read a file using your code in a console application. Can you run this code (console application) and tell me if you have any exception ?

    static void Main(string[] args)
    {

        string fileName = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "textfile.txt");
        using (System.IO.StreamWriter file = new System.IO.StreamWriter(fileName))
        {
            //if the file doesn't exist, create it
            if (!File.Exists(fileName))
                File.Create(fileName);

            for (int i = 0; i < 2; i++)
            {
                file.WriteLine("asdas2");
            }
        }

        using(System.IO.StreamReader fr = new StreamReader(fileName))
        {
            Console.WriteLine(fr.ReadToEnd());
        }
    }

Note, if you are trying to append to the existing file (write at the end of it and keep existing content), you need to use System.IO.StreamWriter(fileName, true).