Azure Cognitive Services (3) Computer Vision API-Analyze images using C # code

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　　In the previous section of Azure Cognitive Services (2) Computer Vision API-analyzing images , the author describes how to use the API test console for debugging.

This chapter describes how to call the Analyze image feature using C # code.

We need to prepare:

1.Azure China Account

2. API Key for the computer Vision API

3. Analysis of the picture url:https://leizhangstorage.blob.core.chinacloudapi.cn/azureblog/analyzeimagesample.jpg

　　

Now start the text:

1. We have access to: HTTPS://DEV.COGNITIVE.AZURE.CN/DOCS/SERVICES/56F91F2D778DAF23D8EC6739/OPERATIONS/56F91F2E778DAF14A499E1FA

You can see that the following code Sample is available in different development languages:

　　

2. We copied C # Code, which is a Windows Console

Modify variables according to the contents of the comment

(1) API Key

(2) JPG image URL

The code is as follows:

        Static voidMain (string[] args)            {makerequest (); Console.WriteLine ("Hit ENTER to exit ...");        Console.ReadLine (); }        Static Async voidmakerequest () {varClient =NewHttpClient (); varqueryString = httputility.parsequerystring (string.            Empty); //Request Headers//Enter the API Key hereClient. Defaultrequestheaders.add ("Ocp-apim-subscription-key","{API Key}"); //Request Parameters//Enter visual Features herequerystring["Visualfeatures"] ="Categories,tags,description,faces,imagetype,color,adult"; querystring["Details"] =""; querystring["language"] ="en"; varURI ="https://api.cognitive.azure.cn/vision/v1.0/analyze?"+queryString;            Httpresponsemessage response; //Enter the JPG image path used here            strings =@"{"url" ":"+@""" Https://leizhangstorage.blob.core.chinacloudapi.cn/azureblog/analyzeimagesample.jpg "" }"; //Request Body            byte[] Bytedata =Encoding.UTF8.GetBytes (s); using(varContent =Newbytearraycontent (bytedata)) {content. Headers.contenttype=NewMediatypeheadervalue ("Application/json"); Response=awaitclient.                Postasync (URI, content); varContents =awaitResponse.                  Content.readasstringasync (); }        }

Azure Cognitive Services (3) Computer Vision API-Analyze images using C # code