Step 1: Firstly we're going to create a new Win Form Application project(I'll call it Cioban Mini Text Editor).



Step 2: To our form we will add three buttons(one for saving the file,one for reading the file,and the other for font),an openfile dialog,a savefile dialog,a font dialog, and rich textbox.Also,we'll ad a new namespace(System.IO).



Step 3: The design it's done.Let's start coding.

In my case:

button1 = open button;
button2 = save button;
button3 = the font button

This is the code

  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Windows.Forms;
  9. using System.IO;
  10. namespace Cioban_Mini_Text_Editor
  11. {
  12. public partial class Form1: Form
  13. {
  14. public Form1()
  15. {
  16. InitializeComponent();
  17. }
  18. private void button1_Click(object sender, EventArgs e)
  19. {
  20. openFileDialog1.ShowDialog(); //Shows the dialog
  21. if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK && openFileDialog1.FileName.Contains(".txt")) //Checks if it's all ok and if the file name contains .txt
  22. {
  23. string open = File.ReadAllText(openFileDialog1.FileName); //Reads the text from file
  24. richTextBox1.Text = open; //Shows the reded text in the textbox
  25. }
  26. else //If something goes wrong...
  27. {
  28. MessageBox.Show("The file you've chosen is not a text file");
  29. }
  30. }
  32. private void button2_Click(object sender, EventArgs e)
  33. {
  34. saveFileDialog1.ShowDialog(); //Opens the Show File Dialog
  35. if (saveFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK) //Check if it's all ok
  36. {
  37. string name = saveFileDialog1.FileName + ".txt"; //Just to make sure the extension is .txt
  38. File.WriteAllText(name, richTextBox1.Text); //Writes the text to the file and saves it
  39. }
  40. }
  41. private void button3_Click(object sender, EventArgs e)
  42. {
  43. fontDialog1.ShowDialog(); //Shows the font dialog
  44. if (fontDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK) {
  45. richTextBox1.Font = fontDialog1.Font; //Sets the font to the one selected in the dialog
  46. }
  47. }
  48. }
  49. }
Enjoy

Thanks guys.