private static bool IsDigitAnswerQuestion(HtmlStore quest)
{
bool retValue = false;
if (quest.SubItems.Count != 1)
{
return(retValue);
}
HtmlStore answer = quest.SubItems[0];
bool isTrue = answer.IsTrue;
if (isTrue)
{
string st = answer.Html;
st = st.Trim();
st = st.Replace("<br/>", "");
st = st.Replace(" ", "");
st = st.Replace("±", "±");
int pos = st.IndexOf("±");
if (pos == -1)
{
if (isFloat(st))
{
retValue = true;
st = st.Replace(",", ".");
answer.Html = st + "±0";
}
else
{
double?dValue = HtmlStore.GetFractionValue(st);
if (dValue.HasValue)
{
retValue = true;
st = dValue.Value.ToString().Replace(",", ".");
answer.Html = st + "±0";
}
}
}
else
{
string subst1 = st.Substring(0, pos);
string subst2 = st.Substring(pos + 1);
if (isFloat(subst1) && isFloat(subst2))
{
retValue = true;
answer.Html = st;
}
else
{
double?dValue = HtmlStore.GetFractionValue(subst1);
if (dValue.HasValue && isFloat(subst2))
{
retValue = true;
st = dValue.Value.ToString().Replace(",", ".");
answer.Html = st + "±" + subst2.ToString();
}
}
}
}
return(retValue);
}
public override bool?IsRightAnswer(Dictionary <string, List <string> > _requestParams, ref string message, ref string questAnswer)
{
List <string> ans = GetValueList(_requestParams, "tcv_testortext", ref questAnswer);
if (ans == null || ans.Count == 0)
{
return(false);
}
string answer = questAnswer.Replace(';', '.');
if (answer.EndsWith("."))
{
answer = answer.Remove(answer.Length - 1, 1);
}
var rightAns = _htmlStore.SubItems.Where(c => c.IsTrue == true);
if (rightAns.Count() == 0)
{
return(false);
}
string right = rightAns.First().Html.Trim();
string sep = CultureInfo.CurrentCulture.NumberFormat.CurrencyDecimalSeparator;
if (sep == ".")
{
answer = answer.Replace(",", ".");
right = right.Replace(",", ".");
}
else
{
answer = answer.Replace(".", ",");
right = right.Replace(".", ",");
}
int pos = right.IndexOf("±");
if (pos < 0)
{
return(false);
}
string stTrue = right.Substring(0, pos);
string stDelta = right.Substring(pos + 1, right.Length - pos - 1);
double flTrue = 0;
double flDelta = 0;
double flUserAnsver = 0;
try
{
flTrue = double.Parse(stTrue, NumberStyles.Any, CultureInfo.CurrentCulture.NumberFormat);
flDelta = double.Parse(stDelta, NumberStyles.Any, CultureInfo.CurrentCulture.NumberFormat);
if (flDelta == 0)
{
flDelta = 0.0001;
}
flUserAnsver = 0.0f;
}
catch (Exception ex)
{
message = ex.Message;
return(null);
}
try
{
double?fractionValue = HtmlStore.GetFractionValue(answer);
if (fractionValue.HasValue)
{
flUserAnsver = fractionValue.Value;
answer = flUserAnsver.ToString();
}
else
{
flUserAnsver = double.Parse(answer, NumberStyles.Any, CultureInfo.CurrentCulture.NumberFormat);
}
}
catch
{
message = "Ответом должно быть десятичное число например \"-3.1415926\".";
return(null);
}
if ((flUserAnsver <= flTrue + flDelta) && (flUserAnsver >= flTrue - flDelta))
{
return(true);
}
else
{
var tv = stTrue.Split(new string[] { sep }, StringSplitOptions.RemoveEmptyEntries);
if (tv.Length != 2)
{
return(false);
}
int fractionLength = tv[1].Length;
flUserAnsver = Math.Round(flUserAnsver, fractionLength);
if ((flUserAnsver <= flTrue + flDelta) && (flUserAnsver >= flTrue - flDelta))
{
return(true);
}
}
return(false);
}