Category Archives: internet

Generate a random password in C#

Posted on May 9, 2018 by RodStephens

As I mentioned in a recent post, you should always use a strong password for every login. Remember, a computer can perform millions or billions of operations per second, so your daughter’s birthday or the name of your son’s guinea … Continue reading →

Posted in algorithms, cryptography, internet | Tagged algorithms, C#, C# programming, cryptography, example, example program, internet, password, password generator, Windows Forms programming | Leave a comment

Why Twitter recently wanted you to change your password

Posted on May 8, 2018 by RodStephens

A few days ago, Twitter asked all of its users to change their passwords. The reason they did that was that they found a bug in their system that made an internal log file store passwords in an unencrypted form. … Continue reading →

Posted in cryptography, internet, miscellany | Tagged C#, C# programming, cryprography, encryption, example, example program, internet, miscellany, password manager, passwords, Twitter, Windows Forms programming | Leave a comment

See if the internet is available in C#

Posted on March 1, 2018 by Rod Stephens

There are many ways you can test your network to see if the internet is available. Some methods may indicate that the network is connected if your local network is available even though the internet is not. Even if you … Continue reading →

Posted in internet, interoperability | Tagged availability, C#, C# programming, example, example program, google, internet, internet available, interoperability, network, network availabile, ping, Windows Forms programming | Leave a comment

Blank the WebBrowser control in C#

Posted on February 4, 2018 by Rod Stephens

If a program displays a web page in a WebBrowser control and then that page become irrelevant to the program, you may want to blank the control. Doing that is as easy as making the control navigate to the special … Continue reading →

Posted in controls, internet, web | Tagged blank WebBrowser control, C#, C# programming, clear WebBrowser control, controls, example, example program, internet, web, WebBrowser, WebBrowser control, Windows Forms programming | Leave a comment

Download and display a text file whenever a program starts in C#

Posted on December 30, 2017 by Rod Stephens

When this example starts, it downloads a file from the internet and displays it. You could do something similar to display a message of the day or announcements for your program. The program uses the following Load event handler to … Continue reading →

Posted in files, internet, web | Tagged C#, C# programming, download, download files, example, example program, files, internet, web, Windows Forms programming | Leave a comment

Display the Astronomy Picture of the Day on the desktop in C#

Posted on January 25, 2017 by RodStephens

This example combines the techniques from the following two posts: Download the Astronomy Picture of the Day in C# Set the Windows desktop picture in C# This example uses two settings, LastLoadTime and LastUrl, to determine whether it is a … Continue reading →

Posted in graphics, image processing, internet, system | Tagged Astronomy Picture of the Day, C#, C# programming, desktop image, desktop picture, download, download images, download pictures, example, example program, graphics, image processing, internet, system, Windows Forms programming | Leave a comment

Download the Astronomy Picture of the Day in C#

Posted on January 24, 2017 by RodStephens

Each day the Astronomy Picture of the Day web page does exactly what you would expect: it displays a different astronomy picture. The pictures include planets, nebulae, spacecraft, and other astronomy-related images, and the page includes an explanation of the … Continue reading →

Posted in graphics, image processing, internet | Tagged Astronomy Picture of the Day, C#, C# programming, download, download images, download pictures, example, example program, graphics, image processing, internet, Windows Forms programming | Leave a comment

Map between host names and IP addresses in C#

Posted on January 11, 2017 by Rod Stephens

When you enter a host name and click Go, the program uses the following code to look up the host and display the IP addresses associated with it. using System.Net; … // Display the entered host’s IP address. private void … Continue reading →

Posted in internet, network, system | Tagged C#, C# programming, DNS look up, DNS lookup, example, example program, host name, internet, IP address, IP addresses, map host name, network, reverse DNS look up, reverse DNS lookup, system, Windows Forms programming | Leave a comment

See if Internet Explorer uses a proxy in C#

Posted on December 28, 2016 by Rod Stephens

This example determines whether the system has Internet Explorer configured to use a proxy. Internet Explorer lets you specify proxy settings. In the Tools menu, select Internet Options. On the Connections tab, click the LAN Settings button. The goal of … Continue reading →

Posted in internet, network, system | Tagged C#, C# programming, example, example program, internet, Internet Explorer, network, proxy, proxy settings, system, Windows Forms programming | Leave a comment

Graph currency rates over time in C#

Posted on December 2, 2016 by RodStephens

This example, which shows how to graph currency rates for a specific currency, is a bit longish. Sorry about that. It uses Yahoo Query Language (YQL), which you can use to perform a wide variety of queries on Yahoo’s data. … Continue reading →