Load your Google Forms page data from dotnet C# with ease! ;) #GoogleFormsToolkitLibrary

LoadGoogleFormStructure.cs

// using HtmlAgilityPack;
// using Newtonsoft.Json.Linq;

/// <summary>
/// Loading Google Form's generic information
/// and Question Field list data including
/// Question Type, Answer Options, Submission Id, etc
/// </summary>
/// <param name="yourGoogleFormsUrl"></param>
/// <returns></returns>
public async Task<GoogleForm> LoadGoogleFormStructureAsync(string yourGoogleFormsUrl)
{
	HtmlWeb web = new HtmlWeb();
	var htmlDoc = await web.LoadFromWebAsync(yourGoogleFormsUrl).ConfigureAwait(false);

	var htmlNodes = htmlDoc.DocumentNode.SelectNodes("//script").Where(
		x => x.GetAttributeValue("type", "").Equals("text/javascript") &&
			 x.InnerHtml.Contains("FB_PUBLIC_LOAD_DATA_"));

	var fbPublicLoadDataJsScriptContent = htmlNodes.First().InnerHtml;

	// cleaning up "var FB_PUBLIC_LOAD_DATA_ = " at the beginning and 
	// and ";" at the end of the script text  
	var beginIndex = fbPublicLoadDataJsScriptContent.IndexOf("[", StringComparison.Ordinal);
	var lastIndex = fbPublicLoadDataJsScriptContent.LastIndexOf(";", StringComparison.Ordinal);
	var fbPublicJsScriptContentCleanedUp = fbPublicLoadDataJsScriptContent
												.Substring(beginIndex, lastIndex - beginIndex).Trim();

	var jArray = JArray.Parse(fbPublicJsScriptContentCleanedUp);

	GoogleForm googleForm = new GoogleForm();
	googleForm.QuestionFieldList = new List<GoogleFormField>();

	var description = jArray[1][0].ToObject<string>();
	var title = jArray[1][8].ToObject<string>();
	var formId = jArray[14].ToObject<string>();
	var formDocName = jArray[3].ToObject<string>();

	googleForm.Description = description;
	googleForm.Title = title;
	googleForm.FormId = formId;
	googleForm.FormDocName = formDocName;

	var arrayOfFields = jArray[1][1];

	foreach (var field in arrayOfFields)
	{
		// Check if this Field is submittable or not
		// index [4] contains the Field Answer 
		// Submit Id of a Field Object 
		// ex: ignore Fields used as Description panels
		// ex: ignore Image banner fields
		if (field.Count() < 4 && !field[4].HasValues)
			continue;

		GoogleFormField googleFormField = new GoogleFormField();

		// Load the Question Field data
		var questionTextValue = field[1]; // Get Question Text
		var questionText = questionTextValue.ToObject<string>();

		var questionTypeCodeValue = field[3].ToObject<int>(); // Get Question Type Code   
		var isRecognizedFieldType = Enum.TryParse(questionTypeCodeValue.ToString(),
										out GoogleFormsFieldTypeEnum questionTypeEnum);

		var answerOptionsList = new List<string>();
		var answerOptionsListValue = field[4][0][1].ToList(); // Get Answers List
		// List of Answers Available
		if (answerOptionsListValue.Count > 0)
		{
			foreach (var answerOption in answerOptionsListValue)
			{
				answerOptionsList.Add(answerOption[0].ToString());
			}
		}

		var answerSubmitIdValue = field[4][0][0]; // Get Answer Submit Id
		var isAnswerRequiredValue = field[4][0][2]; // Get if Answer is Required to be Submitted
		var answerSubmissionId = answerSubmitIdValue.ToObject<string>();
		var isAnswerRequired = isAnswerRequiredValue.ToObject<int>() == 1 ? true : false; // 1 or 0

		googleFormField.QuestionText = questionText;
		googleFormField.QuestionType = questionTypeEnum;
		googleFormField.AnswerOptionList = answerOptionsList;
		googleFormField.AnswerSubmissionId = answerSubmissionId;
		googleFormField.IsAnswerRequired = isAnswerRequired;

		googleForm.QuestionFieldList.Add(googleFormField);
	}

	return googleForm;
}

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