i am trying to write a code to encrypt text using public key and decrypt using private key and passphrase.
I am not very good with programming language because i'm not a programming student. But for my mini-project, i need to write some program about encryption.
For the below code uses a text file from my c drive to encode using the public key. But i want to use openfiledialog to choose the file instead of directing it manually(not really practical)
Really appreciate if anyone can help me edit the codes. P.S. i don't really know how to apply openfiledialog to my code. i keep getting errors when i use informations from youtubes and google.
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms; using System.IO; using DidiSoft.Pgp; namespace TEST2 { public partial class Form1 : Form { PGPLib pgp = new PGPLib(); public Form1() { InitializeComponent(); } private void encryptButton_Click(object sender, EventArgs e) { string testingstring = pgp.EncryptString(testTextBox.Text, new FileInfo(@"c:\TCkeyPublic.txt")); encryptedtextTextBox.Text = testingstring; } private void decryptButton_Click(object sender, EventArgs e) { try { String plainString = pgp.DecryptString(encryptedtextTextBox.Text, new FileInfo(@"c:\TCkeyPrivate.txt"), passphraseTextBox.Text); decryptedtextTextBox.Text = plainString; encryptedtextTextBox.Text = ""; passphraseTextBox.Text = ""; } catch { MessageBox.Show("ERROR! Please check passphrase and do not attempt to edit cipher text"); } } private void passphraseTextBox_TextChanged(object sender, EventArgs e) { } private void Form1_Load(object sender, EventArgs e) { } } } 2 Answers
Assuming you're using WinForms.
Just create an instance of OpenFileDialog, call ShowDialog and if user didn't cancel the operation then read FileName property: it'll contain the full path of selected file. In code:
var dlg = new OpenFileDialog(); if (dlg.ShowDialog() != DialogResult.OK) return; new FileInfo(dlg.FileName, passphraseTextBox.Text); Of course you may need to let user quickly filter files to display, you can use Filter property for that:
var dlg = new OpenFileDialog(); dlg.Filter = "Text Files (*.txt)|*.txt|All Files (*.*)|*.*"; You can even allow multiple selection, set Multiselect to true and you'll get all selected files in the FileNames property:
var dlg = new OpenFileDialog(); dlg.Filter = "Text Files (*.txt)|*.txt|All Files (*.*)|*.*"; dlg.Multiselect = true; if (dlg.ShowDialog() != DialogResult.OK) return; foreach (var path in dlg.FileNames) { new FileInfo(path, passphraseTextBox.Text); // ... } private void decryptButton_Click(object sender, EventArgs e) { OpenFileDialog openFileDialog1 = new OpenFileDialog(); openFileDialog1.InitialDirectory = "c:\\" ; openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ; openFileDialog1.FilterIndex = 2 ; openFileDialog1.RestoreDirectory = true ; if(openFileDialog1.ShowDialog() == DialogResult.OK) { try { String plainString = pgp.DecryptString(encryptedtextTextBox.Text,new FileInfo(openFileDialog1.FileName), passphraseTextBox.Text); decryptedtextTextBox.Text = plainString; encryptedtextTextBox.Text = ""; passphraseTextBox.Text = ""; } catch { MessageBox.Show("ERROR! Please check passphrase and do not attempt to edit cipher text"); } } } ncG1vNJzZmirpJawrLvVnqmfpJ%2Bse6S7zGiorp2jqbawutJoaHJuZmWEeIGOoaawZaSkera%2FxGamqZ2eYrOquMRmm6KZnKS0