Category Archives: internet

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 →

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 | 3 Comments

Get currency exchange rates in C#

Posted on December 2, 2016 by RodStephens

This example shows how you can get currency exchange rates from finance.yahoo.com. When it starts, the program uses the following code to get the currency exchange rates. // Get the currency symbols. private void Form1_Load(object sender, EventArgs e) { string … 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, internet, mathematics, stock prices, stocks, web, WebClient, Windows Forms programming | 3 Comments

Get stock prices from different exchanges in C#

Posted on December 1, 2016 by RodStephens

The example Get stock prices from the internet in C# shows how to download stock prices from download.finance.yahoo.com. It builds a URL of the following form to get prices for MCI, DIS, COKE, and PEP: http://download.finance.yahoo.com/d/quotes.csv?s=MCI+DIS+COKE+PEP&f=sl1d1t1c1 To get prices from … Continue reading →

Posted in finance, internet, mathematics, web | Tagged C#, C# programming, example, example program, finance, get stock prices, get stocks, internet, mathematics, stock prices, stocks, web, WebClient, Windows Forms programming | 1 Comment

Make a temperature forecast in C#

Posted on May 18, 2016 by RodStephens

The example Get weather forecast data in C# explains how to read weather forecast data from OpenWeatherMap. This example uses that data to list the forecast’s temperatures. The forecast data has (in part) the following structure. <weatherdata> … <forecast> <time … Continue reading →

Posted in internet, interoperability, web, XML | Tagged C#, C# programming, example, example program, internet, interoperability, temperature, temperature forecast, weather conditions, weather forecast, web, Windows Forms programming, XML | 5 Comments

Get weather forecast data in C#

Posted on May 16, 2016 by RodStephens

There are many sites that offer weather condition and weather forecast services. All of the ones I found required you to have a developer key, although most of them have a free membership that works for a simple program like … Continue reading →

Posted in internet, interoperability, web, XML | Tagged C#, C# programming, example, example program, internet, interoperability, weather conditions, weather forecast, web, Windows Forms programming, XML | Leave a comment

Display Google Maps for the computer’s location in C#

Posted on May 10, 2016 by RodStephens

This example combines the techniques of the following two posts to display the computer’s current location in Google Maps: Use the Location API to find the computer’s latitude and longitude in C# Display Google maps for an address inside a … Continue reading →