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Category Archives: internet
Get a weather forecast from openweathermap.org in C#
This example displays a weather forecast from openweathermap.org. To get a forecast or other data, you build a URL describing your request and navigate to it. You then parse the returned XML or JSON data to see what openweathermap.org has … Continue reading
Posted in internet, web, XML
Tagged C#, C# programming, example, example program, forecasts, internet, JSON, weather, weather forecast, web, Windows Forms programming, XML
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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
Posted in internet, interoperability
Tagged availability, C#, C# programming, example, example program, google, internet, internet available, interoperability, network, network availabile, ping, Windows Forms programming
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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
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
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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
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
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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
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
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