/// <summary>
///
/// </summary>
/// <param name="testFileName"></param>
/// <returns></returns>
private static List <Question> ReadFile(string testFileName)
{
List <Question> testQuestion = new List <Question>();
try
{
using (StreamReader sr = new StreamReader(testFileName, Encoding.UTF8))
{
TestTitle = sr.ReadLine();
string questionTypeFromFile;
while ((questionTypeFromFile = sr.ReadLine()) != null)
{
questionTypeFromFile = questionTypeFromFile.ToUpperInvariant();
if (questionTypeFromFile.Equals(Constants.QuestionType.K.ToString()))
{
KeyTermQuestion k = new KeyTermQuestion();
k.KeyTerm = sr.ReadLine();
k.ValidateAndSetMedia((Constants.MediaType)Enum.Parse(typeof(Constants.MediaType), sr.ReadLine()), sr.ReadLine());
k.Definition = sr.ReadLine();
k.Explanation = k.KeyTerm + ": " + k.Definition;
testQuestion.Add(k);
}
else if (questionTypeFromFile.Equals(Constants.QuestionType.M.ToString()))
{
MultipleChoiceQuestion m = new MultipleChoiceQuestion();
m.Question = sr.ReadLine();
m.ValidateAndSetMedia((Constants.MediaType)Enum.Parse(typeof(Constants.MediaType), sr.ReadLine()), sr.ReadLine());
m.NumberOfChoices = Int32.Parse(sr.ReadLine());
for (int x = 0; x <= m.NumberOfChoices; x++)
{
m.Choices.Add(sr.ReadLine());
}
string tempExplanation = sr.ReadLine();
if (tempExplanation.ToLowerInvariant().Equals("null") || String.IsNullOrEmpty(tempExplanation))
{
m.Explanation = "The answer is: " + m.Choices[0];
}
else
{
m.Explanation = tempExplanation;
}
testQuestion.Add(m);
}
else if (questionTypeFromFile.Equals(Constants.QuestionType.T.ToString()))
{
TrueFalseQuestion t = new TrueFalseQuestion();
t.Question = sr.ReadLine();
t.ValidateAndSetMedia((Constants.MediaType)Enum.Parse(typeof(Constants.MediaType), sr.ReadLine()), sr.ReadLine());
t.Answer = Boolean.Parse(sr.ReadLine());
string tempExplanation = sr.ReadLine();
if (tempExplanation.ToLowerInvariant().Equals("null") || String.IsNullOrEmpty(tempExplanation))
{
t.Explanation = "The answer is: " + t.Answer;
}
else
{
t.Explanation = tempExplanation;
}
testQuestion.Add(t);
}
else
{
throw new ArgumentException("Corrupt data file. Check structure and values.");
}
}
}
}
catch (FileNotFoundException ex)
{
throw new FileNotFoundException("Cannot find test file: " + ex.ToString());
}
catch (IOException ex)
{
throw new IOException("Cannot open test file: " + ex.ToString());
}
return(testQuestion);
}
/// <summary>
/// Creates an array list of test questions.
/// </summary>
/// <param name="testFileName">The name of the test data file</param>
/// <param name="questionOrder">Question order setting: Default to display questions as read from the file, Random to randomize the order.</param>
/// <param name="termDisplay">Term display settings: TermAsQuestion to display terms as question (Default); DefinitionAsQuestion to display definitions as question; Mixed to mix it up.</param>
/// <returns>A formatted list of test questions created from test data objects.</returns>
public static List <TestQuestion> GetTest(string testFileName, Constants.QuestionOrder questionOrder, Constants.TermDisplay termDisplay)
{
List <TestQuestion> testQuestions = new List <TestQuestion>();
List <Question> testData = ReadFile(testFileName);
List <int> ktIndex = new List <int>();
for (int x = 0; x < testData.Count; x++)
{
if (testData[x].QuestionType == Constants.QuestionType.K)
{
ktIndex.Add(x);
}
}
int ktCount = 0;
for (int x = 0; x < testData.Count; x++)
{
Constants.QuestionType qt = testData[x].QuestionType;
RandomNumbers rn;
switch (qt)
{
case Constants.QuestionType.K:
KeyTermQuestion kt = (KeyTermQuestion)testData[x];
int ktNumberOfChoices = ((ktIndex.Count - 1) < 3 ? (ktIndex.Count - 1) : 3);
List <string> ktTempChoices = new List <string>();
rn = new RandomNumbers((ktIndex.Count - 1), ktCount, ktNumberOfChoices);
bool displayTermAsQuestion = true;
switch (termDisplay)
{
case Constants.TermDisplay.DefinitionAsQuestion:
displayTermAsQuestion = false;
break;
case Constants.TermDisplay.Mixed:
displayTermAsQuestion = (Random.Next(2) == 0 ? false : true);
break;
case Constants.TermDisplay.TermAsQuestion:
default:
break;
}
if (displayTermAsQuestion)
{
for (int y = 0; y <= ktNumberOfChoices; y++)
{
ktTempChoices.Add(((KeyTermQuestion)testData[ktIndex[rn.UniqueArray[y]]]).Definition);
}
testQuestions.Add(new TestQuestion(qt, kt.KeyTerm, kt.MediaType, kt.MediaFileName, ktNumberOfChoices, ktTempChoices, rn.IndexLocation, kt.Explanation));
}
else
{
for (int y = 0; y <= ktNumberOfChoices; y++)
{
ktTempChoices.Add(((KeyTermQuestion)testData[ktIndex[rn.UniqueArray[y]]]).KeyTerm);
}
testQuestions.Add(new TestQuestion(qt, kt.Definition, kt.MediaType, kt.MediaFileName, ktNumberOfChoices, ktTempChoices, rn.IndexLocation, kt.Explanation));
}
ktCount++;
break;
case Constants.QuestionType.M:
MultipleChoiceQuestion mc = (MultipleChoiceQuestion)testData[x];
List <string> mcTempChoices = new List <string>();
rn = new RandomNumbers(mc.NumberOfChoices, 0, mc.NumberOfChoices);
for (int i = 0; i <= mc.NumberOfChoices; i++)
{
mcTempChoices.Add(mc.Choices[rn.UniqueArray[i]]);
}
testQuestions.Add(new TestQuestion(qt, mc.Question, mc.MediaType, mc.MediaFileName, mc.NumberOfChoices, mcTempChoices, rn.IndexLocation, mc.Explanation));
break;
case Constants.QuestionType.T:
TrueFalseQuestion tf = (TrueFalseQuestion)testData[x];
List <string> tfTempChoices = new List <string> {
"true",
"false"
};
testQuestions.Add(new TestQuestion(qt, tf.Question, tf.MediaType, tf.MediaFileName, 1, tfTempChoices, (tf.Answer ? 0 : 1), tf.Explanation));
break;
default:
throw new ArgumentException("Corrupt data. Check structure and values.");
}
}
if (questionOrder == Constants.QuestionOrder.Random)
{
RandomNumbers qoArray = new RandomNumbers(testQuestions.Count);
for (int x = 0; x < testQuestions.Count; x++)
{
TestQuestion temp = testQuestions[x];
testQuestions[x] = testQuestions[qoArray.UniqueArray[x]];
testQuestions[qoArray.UniqueArray[x]] = temp;
}
}
return(testQuestions);
}
