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Category Archives: internet
Generate a random password in C#
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
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Why Twitter recently wanted you to change your password
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
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See if the internet is available in C#
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
Blank the WebBrowser control in C#
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
Download and display a text file whenever a program starts in C#
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
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Display the Astronomy Picture of the Day on the desktop in C#
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
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Download the Astronomy Picture of the Day in C#
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
Map between host names and IP addresses in C#
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
See if Internet Explorer uses a proxy in C#
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
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Graph currency rates over time in C#
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
Posted in finance, internet, mathematics, web
Tagged C#, C# programming, currency conversion rates, currency exchange rates, currency prices, example, example program, finance, get currency conversion rates, get currency exchange rates, get currency prices, get stock prices, get stocks, graph currency conversion rates, graph currency exchange rates, graph currency prices, graph currency rates, internet, mathematics, stock prices, stocks, web, WebClient, Windows Forms programming
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