Question

I have a question about Converting from TextBox to Text File. For small files work perfect but for big file it is too slow. I read TextBox line after lines ans then save it to text file. WHat did i do here wrong? I tried with stringbuilder but the result is the same.

My code:

  StreamWriter sw = File.CreateText(saveFileDialog2.FileName);
            //sw.WriteLine(richTextBox1.Text);
            //StringBuilder sw1 = new StringBuilder();

            for (int i = 0; i < richTextBox1.Lines.Length; i++)
            {
                sw.WriteLine(richTextBox1.Lines[i]);
                //sw1.AppendLine( richTextBox1.Lines[i]);
            }

            //sw.Write(sw1.ToString());
            sw.Flush();
            sw.Close();

Answer 1

You can try:

File.WriteAllText(filename, RichTextBox1.Text)

Or as mentioned in the comments:

File.WriteAllLines(filename, RichTextBox1.Lines)