Run SQL to add new question type to database:

insert into QuestionType values(NEWID(),'ESSAY','Essay')

Add the view in /Views/StudentExam/TakeExam.cshtml

@if (Model.QuestionType == "ESSAY"){
<!--Add the rich text editor code here-->
}

Explore rich text editor options:

• https://www.tiny.cloud/tinymce/
• https://quilljs.com/

Add a “mark essay” section in /Views/Result/StudentQuestionAnswer

@if (item.QuestionType == "ESSAY"){
	<form asp-action="MarkEssay" asp-controller="Result">
		<div class="color-primarycolor">@Resource.StudentAnswer</div>
		<div><textarea class="form-control" rows="3" readonly>@item.AnswerText</textarea></div>
		<label for="[email protected]">Marks Obtained:</label>
		<input type="number" name="Marks" placeholder="Enter the marks" class="form-control" required />
		<!--Add other hidden inputs for the id fields too, like:-->
		<input type="text" name="StudentId" value="@item.StudentId" class="form-control" hidden />
		<input type="text" name="QuestionId" value="@item.QuestionId" class="form-control" hidden />
		<input type="text" name="StudentId" value="@item.StudentId" class="form-control" hidden />
		<input type="text" name="AnswerId" value="@item.AnswerId" class="form-control" hidden />
		<button type="submit" class="btn btn-primary">Submit Marks</button>
	</form>
}

Add code in Result controller to save the mark

[HttpPost]
public IActionResult MarkEssay(int Marks, Guid? StudentId, Guid? QuestionId, Guid? AnswerId, Guid? ExamId)
{
    //Add code to save the marks
    
    TempData["NotifySuccess"] = "Marks submitted successfully.";
    //result/studentquestionanswer?eId=5b6c52c0-5697-4166-b504-6ddcda14b6aa&sId=877b218c-3bb5-4295-9198-e73636ef778e&num=1
    return RedirectToAction("studentquestionanswer", "Result",new{eid=ExamId,sid=StudentId});