CODEWITHSUNDEEP
c#documentinformation-retrieval
M.B
M.B

Reputation: 11

How can I use Google Search in my C# project?

i build mini Question Answering System in C#. I need retrieve document by google Search. What is google tools name, i can use it in my project?

Thanks

Upvotes: 1

Views: 1017

Answers (2)

Mark Wilkins
Mark Wilkins

Reputation: 41222

One possibility is to set up a custom Google search engine. Then you also need to create a developer key, which I believe is done under the console.

After setting that up, you can make REST style call with code such as the following, which retrieves the results as JSON:

WebClient w = new WebClient();

string result;
string uri;
string googleAPIKey = "your developer key";
string googleEngineID = "your search engine id";
string template = "https://www.googleapis.com/customsearch/v1?key={0}&cx={1}&q={2}&start={3}&alt=json";
int startIndex = 1;
int gathered = 0;

uri = String.Format(template, googleAPIKey, googleEngineID, "yoursearchstring", startIndex);
result = w.DownloadString(uri);

For extracting the information from the JSON results, you can use something like Json.NET. It makes it extremely easy to read the information:

JObject o = JObject.Parse(result);

Then you can directly access the desired information with a single line of code.

One important piece of information is that the search API free usage is extremely limited (100 requests per day). So for a real-world application it would probably be necessary to pay for the search. But depending on how you use it, maybe 100 requests per day is sufficient. I wrote a little mashup using the Google search API to search for Stackoverflow site information of interest and then used the StackExchange API to retrieve the information. For that personal use, it works very well.

Upvotes: 3

cbley
cbley

Reputation: 1755

I've never used it before (and it's alpha), but take a look at Google APIs for .NET Framework library.

Upvotes: 2

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