Decrypting multiple text files and storing in multiple text

Robin Bura

11y1.3kVisual Basic .NET

I have a program given below. I wanna process multiple text file at once and display the result in different text file.

Please help.

namespace TMSDescriptionSample

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

string error = "";

string encryptedText = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory + "input.txt");

string decryptedText = TMSDecryptionAPI.DecryptString(encryptedText, ref error); //pass the encrypted text to this function and it will return the decrypted text.

File.WriteAllText(AppDomain.CurrentDomain.BaseDirectory + "ouput.txt", decryptedText);

MessageBox.Show("Done");

}

10 Replies

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Robin Bura11y ago
Here is some of the enrypted files: https://www.dropbox.com/s/rnw45rtnhq1ad85/UploadedData.rar?dl=0
Vulpes11y ago
Well, it's clearly not going to work if you haven't created files with those names in the base directory!

Although there's an easy way to iterate through all .txt files in a particular directory, before you do that, I'd create some specimen files - called input.txt and input1.txt - to check your encryption API is working OK.
Robin Bura11y ago
Then also its not working.

Here is link of program:

https://www.dropbox.com/s/vzzgpmzeez2dz4w/TMSDecryptionAPI%20v1.0%2010092012.rar?dl=0

If I don't know the names of input files in the directory.
Vulpes11y ago
That will be because you haven't yet created a file called input2.txt in that directory.

If you just want to work with what you've already got, then change this line:

string[] inputFiles = {"input.txt", "input1.txt", "input2.txt"};

to this:

string[] inputFiles = {"input.txt", "input1.txt"};
Robin Bura11y ago
error is generated, attached herewith
Vulpes11y ago
Sure, my original suggestion would now become:

private void button1_Click(object sender, EventArgs e)
{
string[] inputFiles = {"input.txt", "input1.txt", "input2.txt"};

for(int i = 0; i < inputFiles.Length; i++)
{
string error = "";
string encryptedText = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory + inputFiles[i]);
string decryptedText = TMSDecryptionAPI.DecryptString(encryptedText, ref error);

if (error != "")
{
MessageBox.Show(error + " when decrypting " + inputFiles[i] + " which has been skipped");
}
else
{
File.AppendAllText(AppDomain.CurrentDomain.BaseDirectory + "output.txt", decryptedText);
}
}

MessageBox.Show("Done");
}

If you want to ensure that the decrypted text for each file starts on a new line in output.txt, you could change:

File.AppendAllText(AppDomain.CurrentDomain.BaseDirectory + "output.txt", decryptedText);

to:

File.AppendAllText(AppDomain.CurrentDomain.BaseDirectory + "output.txt", decryptedText + Environment.NewLine);
Robin Bura11y ago
can u please explain with code snippet
Vulpes11y ago
If you want to write all the output to a single file then, to avoid overwriting what has already been written, you'll need to use File.AppendAllText rather than File.WriteAllText for each file.
Robin Bura11y ago
It is not resolving the issue,

Input files are many from a directory and output should be one.

Here is code i designed for two input files

private void button1_Click(object sender, EventArgs e)
{
string error = "";
string encryptedText = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory + "input.txt");
string decryptedText = TMSDecryptionAPI.DecryptString(encryptedText, ref error); //pass the encrypted text to this function and it will return the decrypted text.
string encryptedText1 = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory + "input1.txt");
string decryptedText1 = TMSDecryptionAPI.DecryptString(encryptedText1, ref error); //pass the encrypted text to this function and it will return the decrypted text.
File.WriteAllText(AppDomain.CurrentDomain.BaseDirectory + "ouput.txt", decryptedText + decryptedText1);

MessageBox.Show("Dongfve");
}
}
}
Vulpes11y ago
It's just a matter of generalizing the code to deal with multiple files.

For example:

private void button1_Click(object sender, EventArgs e)
{
string[] inputFiles = {"input1.txt", "input2.txt", "input3.txt"};
string[] outputFiles = {"output1.txt", "output2.txt", "output3.txt"};

for(int i = 0; i < inputFiles.Length; i++)
{
string error = "";
string encryptedText = File.ReadAllText(AppDomain.CurrentDomain.BaseDirectory + inputFiles[i]);
string decryptedText = TMSDecryptionAPI.DecryptString(encryptedText, ref error);

if (error != "")
{
MessageBox.Show(error + " when decrypting " + inputFiles[i] + " which has been skipped");
}
else
{
File.WriteAllText(AppDomain.CurrentDomain.BaseDirectory + outputFiles[i], decryptedText);
}
}

MessageBox.Show("Done");
}

If this takes too long or makes the UI unresponsive, then you may need to consider using background threads to spread the load.