Word Clouds from VK

Recently, I sharply wanted to know how often the word “coffee” is found in the public of my friend, as well as to build a beautiful cloud of words, based on the frequency of their appearance in posts.
If you are interested in how to do it literally on your knee, using C #, then please under the cat.

Getting data from VK

First, install the appropriate library . Create an application VK.

var services = new ServiceCollection(); var vkApi = new VkApi(services); 

Let us log in, although this stage can be skipped, but then the number of available “walls” in VK will decrease dramatically.

  vkApi.Authorize(new ApiAuthParams { AccessToken = " ",Settings = Settings.All}); 

or:
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 vkApi.Authorize(new ApiAuthParams { Login = "Login", Password = "Password", Settings = Settings.All }); 

We get the last 100 posts on the selected wall.

 var posts=vkApi.Wall.Get(new WallGetParams { OwnerId = (long)Id,//   id    - Count = 100 }); 

From the existing collection will make one big line.

 foreach (var post in posts.WallPosts) { if (!string.IsNullOrEmpty(post.Text)) data += post.Text; } 

Next, you can clear the selected line of punctuation.

  data =Regex.Replace(data,"\\!|\\?|\\(|\\)|\"|\\#|\\,|»|«|-" , string.Empty); 

Well, we extract a collection of words.

  var words = data.Split(default(Char[]), StringSplitOptions.RemoveEmptyEntries).ToList(); 

At the penultimate stage we will compile a dictionary with the frequency of words.

 var wordsDictionary = new Dictionary<string, int>(); foreach (var word in words) { if (wordsDictionary.ContainsKey(word.ToLower())) wordsDictionary[word.ToLower()] += 1; else { wordsDictionary.Add(word.ToLower(),1); } } 

At the end, sort it and, if desired, save it to a file.

 wordsDictionary = wordsDictionary.OrderByDescending(x => x.Value).ToDictionary(x => x.Key, x => x.Value); 

Moving on to create a word cloud.

To do this, you must add a System.Drawing dependency to the project and this package .

Add a dependency to our application.

 using WordCloudGen = WordCloud.WordCloud; 

And form the image.

  var wc = new WordCloudGen(1024, 1024); wc.Draw(wordsDictionary.Keys.ToList(), wordsDictionary.Values.ToList()) .Save("cloudwords.jpg"); Console.WriteLine("pict create"); 

In conclusion, I would like to say thanks to the worldbeater user and remind you that the library for VC has excellent support in shopping center . By the way, the word "coffee" for 100 posts met 142 times.