问题
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)
{
}
}
}
回答1:
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);
// ...
}
回答2:
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");
}
}
}
来源:https://stackoverflow.com/questions/19660775/how-to-use-open-file-dialog