How to pass a variable in url in c#

Question

I am trying to pass a string into a url in C#:

using (var client = new WebClient()) { var responseStr = client.DownloadString("http://api.openweathermap.org/data/2.5 /weather?q=Groningen,nl&APPID=%207b030ffcc7338cc5f1adc4ca8e6205aa"); }

I there a way to pass a string variable, instead of ?q=Groningen So I could use a text field to get the weather of a city.

I could not find the answer.

Thank you

Why don't you use string concatenation? Did you encounter a problem? — Panagiotis Kanavos
– Panagiotis Kanavos, Commented Dec 24, 2014 at 14:45

Kavindu Dodanduwa · Accepted Answer · 2014-12-24 14:39:09Z

In C# you can use + operator to concatenate strings.

So you can use something like following,

using (var client = new WebClient()) { var responseStr = client.DownloadString("http://api.openweathermap.org/data/2.5 /weather?q="+CHOICE+",nl&APPID=%207b030ffcc7338cc5f1adc4ca8e6205aa"); }

CHOICE is the variable with your desired location.

More on concatenate : here

Thank you. It worked. I tried it before. But then the blue lined url was no longer 100%. So I thought it was not going to work. I thought i needed Request.Querie.

Christos · Accepted Answer · 2014-12-24 14:31:35Z

You could use string concatenation to do so:

var url = "http://.....q="+city+"&....."; var responseStr = client.DownloadString(url);

where city is the variable that holds the city you want to pass.

Salman Mushtaq · Accepted Answer · 2017-09-19 11:27:01Z

Webclient client = new Webclient(); string city = "Lahore"; string appId = "123456789"; string url = "http://api.openweathermap.org/data/2.5/weather?APPID="+appId+"&q="+city+""; var json = client.DownloadString(json);

Now de-serialize josn response as per your requirement.

Either using any way below

JavaScriptSerializer

JSON.Net library

DataContractJsonSerializer

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