[Tutorial] [C#] Upload to pastebin

[iAegle]

I made this some time ago, it basicly uploads the code to www.pastebin.com
Note that this can be done with alot of websites but the variables just have a different name
SIMPLE VERSION:
This one just uploads the file and dat's it.

First make a simple form with a few textboxes and a button:


then double click the button. All we do is send an array to a website and wait for the response. Here are the variables that you define:

Code:

System.Collections.Specialized.NameValueCollection Data = new System.Collections.Specialized.NameValueCollection(); Data["api_paste_name"] = textBox2.Text; Data["api_paste_expire_date"] = "N"; Data["api_paste_code"] = textBox1.Text; Data["api_dev_key"] = "YOUR DEV KEY HERE"; Data["api_option"] = "paste";

you devkey can be found here (you need a pastebin account): http://pastebin.com/api#1

textbox1.text will be the text that gets uploaded and textbox2.text is the title of the paste. The expiration codes can be found here: http://pastebin.com/api#6 the current one doesn't expire ("N" .. Never). Don't change the option: "paste".

now we gotta send that shit to www.pastebin.com, for this we use a WebClient (its in the System.Net namespace)

Code:

WebClient wb = new WebClient(); byte[] bytes = wb.UploadValues( "http://pastebin.com/api/api_post.php", Data );

now "bytes" will contain a byte array which we need to convert to a string:

Code:

string response; using ( MemoryStream ms = new MemoryStream( bytes ) ) using ( StreamReader reader = new StreamReader( ms ) ) response = reader.ReadToEnd();

now "response" will contains either an error or the link to the paste, to check if its an error just use:

Code:

if ( response.StartsWith( "Bad API request" ) ) { // do whatever you want when there's something wrong with the paste } else { // do the stuff if the paste is correct textBox3.Text = response; }

And there you go, now you can check the link and see if its working!

Here's my end result:

Code:

using System; using System.Collections.Generic; using System.ComponentModel; using System.Windows.Forms; using System.Net; using System.IO; namespace Pastebin { public partial class Form1 : Form { public Form1() { InitializeComponent(); textBox3.Enabled = false; textBox3.ReadOnly = true; } private void button1_Click( object sender, EventArgs e ) { Upload: System.Collections.Specialized.NameValueCollection Data = new System.Collections.Specialized.NameValueCollection(); Data["api_paste_name"] = textBox2.Text; Data["api_paste_expire_date"] = "N"; Data["api_paste_code"] = textBox1.Text; Data["api_dev_key"] = "4dd29af09faf6e39abcae2c910ad8f2e"; Data["api_option"] = "paste"; WebClient wb = new WebClient(); byte[] bytes = wb.UploadValues( "http://pastebin.com/api/api_post.php", Data ); string response; using ( MemoryStream ms = new MemoryStream( bytes ) ) using ( StreamReader reader = new StreamReader( ms ) ) response = reader.ReadToEnd(); if ( response.StartsWith( "Bad API request" ) ) { if ( MessageBox.Show( "Failed to upload!", "Error", MessageBoxButtons.RetryCancel, MessageBoxIcon.Error ) == DialogResult.Retry ) goto Upload; } else { if ( checkBox1.Checked ) response = "http://pastebin.com/raw.php?i=" + response.Substring( 20 ); Clipboard.SetText( response ); textBox3.Text = response; textBox3.Enabled = true; MessageBox.Show( "Succesfully uploaded! \r\nLink copied to clipboard.", "Success!" ); } } } }

I added a "Raw file" button so it shows the raw file .. kinda pointless but whatever

ADVANCED VERSION:
this version can upload a paste to an account, make it private and format it.

so we just copy and paste the stuff we have from the simple version, add 2 extra textboxes to the form which will be the username and password and we add a combobox for private/public.

Note: I replaced the bytes to text part with this function:

Code:

string ResponseText( byte[] bytes ) { using ( MemoryStream ms = new MemoryStream( bytes ) ) using ( StreamReader reader = new StreamReader( ms ) ) return reader.ReadToEnd(); }

First the login part, we need to get a "api_user_key" which we can get the same way as posting it. We need 3 things:

Code:

Data["api_user_name"] = textBox4.Text; Data["api_user_password"] = textBox5.Text; Data["api_dev_key"] = "YOUR DEV KEY";

then we send it again and wait for the response:

Code:

bytes = wb.UploadValues( "http://pastebin.com/api/api_login.php", Data ); response = ResponseText( bytes );

again check for errors:

Code:

if ( response.StartsWith( "Bad API request" ) )

if it doesn't return an error then:

Code:

Data["api_user_key"] = response;

now when you send the data it will be uploaded to that account

for formatted code we just add:

Code:

Data["api_paste_format"] = "FORMAT CODE HERE";

codes can be found here: http://pastebin.com/api#5

And the last one: Private/public pastes which is also pretty easy:

Code:

Data["api_paste_private"] = comboBox2.SelectedItem.ToString().ToLower() == "private" ? "1" : "0";

For this you need 2 options in your combobox, "Private" and "Public".

edit:
Here's the endresult for the advanced one:

Code:

using System; using System.Collections.Generic; using System.ComponentModel; using System.Windows.Forms; using System.Net; using System.IO; namespace Pastebin { public partial class Form1 : Form { public Form1() { InitializeComponent(); textBox3.Enabled = false; textBox3.ReadOnly = true; } string ResponseText( byte[] bytes ) { using ( MemoryStream ms = new MemoryStream( bytes ) ) using ( StreamReader reader = new StreamReader( ms ) ) return reader.ReadToEnd(); } private void button1_Click( object sender, EventArgs e ) { Upload: System.Collections.Specialized.NameValueCollection Data = new System.Collections.Specialized.NameValueCollection(); WebClient wb = new WebClient(); string response; byte[] bytes; if ( textBox4.Text != "Username" && textBox5.Text != "Password" ) { Data["api_user_name"] = textBox4.Text; Data["api_user_password"] = textBox5.Text; Data["api_dev_key"] = "4dd29af09faf6e39abcae2c910ad8f2e"; bytes = wb.UploadValues( "http://pastebin.com/api/api_login.php", Data ); response = ResponseText( bytes ); if ( response.StartsWith( "Bad API request" ) ) { if ( MessageBox.Show( "Login failed, do you want to upload it as guest?", "Login failed", MessageBoxButtons.YesNo, MessageBoxIcon.Error ) == DialogResult.Yes ) { Data["api_user_name"] = textBox4.Text; Data["api_user_password"] = textBox5.Text; goto SkipLogin; } else return; } Data["api_user_key"] = response; } SkipLogin: Data["api_paste_private"] = comboBox2.SelectedItem.ToString().ToLower() == "private" ? "1" : "0"; Data["api_paste_name"] = textBox2.Text; Data["api_paste_expire_date"] = "N"; Data["api_paste_code"] = textBox1.Text; Data["api_option"] = "paste"; bytes = wb.UploadValues( "http://pastebin.com/api/api_post.php", Data ); response = ResponseText( bytes ); if ( response.StartsWith( "Bad API request" ) ) { if ( MessageBox.Show( "Failed to upload!\r\n" + response, "Error", MessageBoxButtons.RetryCancel, MessageBoxIcon.Error ) == DialogResult.Retry ) goto Upload; } else { if ( checkBox1.Checked ) response = "http://pastebin.com/raw.php?i=" + response.Substring( 20 ); Clipboard.SetText( response ); textBox3.Text = response; textBox3.Enabled = true; MessageBox.Show( "Succesfully uploaded! \r\nLink copied to clipboard.", "Success!" ); } } } }

[Pozzuh]

Nice tutorial

[kokole]

C# tutorials spam attack

[iAegle]

C# tutorials spam attack

Yeah thats why I wanted to post this aswell :p We need more of these small things

[barata]

Well with all this small tutos you can make something big!

Keep em COMMING!

Thanks Barata...

[OrangePL]

I've brought C/C++ section back to life

good tutorial

[aosma8]

Nice work, keep it up !