C#

xiecsuk wrote:

That's all I want to do; replace the old with the new value

writer.Seek(0);

const string filename = "wwwroot/Counter/Counter.txt";
using (var counterStream = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite, FileShare.None))
{
    int visits;
    using (var reader = new StreamReader(counterStream))
    {
        string line = reader.ReadLine;
        int.TryParse(line, out visits);
    }
    
    visits = visits + 1;
    counterStream.Seek(0L, SeekOrigin.Begin);
    
    using (var writer = new StreamWriter(counterStream))
    {
        writer.Write(visits);
    }
}

An exception of type 'System.ObjectDisposedException' occurred in System.IO.FileSystem.dll but was not handled in user code

Additional information: Cannot access a closed file.

using (var reader = new StreamReader(counterStream, System.Text.Encoding.UTF8, true, 4096, true))

var reader = new StreamReader(counterStream);
string line = reader.ReadLine;
int.TryParse(line, out visits);
...

You have to do the following to get the saved Counter :
1.1. Open the File
1.2. Read your Value
1.3. Close the File

And you have to do the following to save the Counter :
2.1. Open the File
2.2. Write your Value
2.3. Close the File

private static int _count;
private static readonly string _fileName = @"C:\my\file\path\and.name";
private static readonly Object _sync = new Object();

public static void Increment()
{
   lock(_sync)
   {
      _count++;

      File.WriteAllText(_fileName, _count.ToString());
   }         
}

void AppStartEvent()
{
   lock(_sync)
   {
      var seed = File.ReadAllText(_fileName);
      int result = 0;
      if(int.TryParse(seed,out result))
      {      
         _count = result;
      }else{
         _count = 0;
      }
   }   
}

Member 13014278 wrote:

I want do the same thing but in desktop. Is it possible?

public void ShowCursorLoadImage()
        {
            Form frm = new Form();
            PictureBox pb = new PictureBox() { Image = Image.FromFile(@"C:\Users\bfernandes\Documents\KinectMControl\src\KinectV2MouseControl\bin\Release\Images\lamp1.bmp") };
            frm.Cursor = new Cursor(((Bitmap)pb.Image).GetHicon());
            frm.WindowState = FormWindowState.Maximized;
            frm.TransparencyKey = frm.BackColor = System.Drawing.Color.Turquoise;
            frm.FormBorderStyle = FormBorderStyle.None;
            frm.ShowDialog();

        }