public static void OnTxtInputTextChange(object sender, EventArgs e)
{
TextBox txt = sender as TextBox;
Tuple <int, Type> pair = (Tuple <int, Type>)txt.Tag;
if (txt.Text == "") // TEXT BOX EMPTY
{
argBoxes[pair.Item1].LblRHS.ForeColor = Color.Gray;
argBoxes[pair.Item1].LblRHS.Text = pair.Item2.Name;
}
else
{
object evaluated = JSEval.Eval(txt.Text);
if (evaluated.ToString() != "" && (evaluated.GetType().Name == pair.Item2.Name || pair.Item2 == typeof(object)))
{
argBoxes[pair.Item1].LblRHS.ForeColor = Color.Gray;
argBoxes[pair.Item1].LblRHS.Text = evaluated.ToString();
EvaluateFormula();
}
else
{
argBoxes[pair.Item1].LblRHS.ForeColor = Color.Red;
argBoxes[pair.Item1].LblRHS.Text = "Invalid Input";
}
}
}
public static void EvaluateFormula()
{
int loopCount = argBoxes.Count;
if (currentFunction.Arguments.Count == 0)
{
loopCount -= 1;
}
object[] args = new object[loopCount];
for (int i = 0; i < loopCount; i++)
{
object value = JSEval.Eval(argBoxes[i].TxtInput.Text);
if (value == null || value.ToString() == "")
{
lblResult.Text = "Formula Result = ";
return;
}
else
{
args[i] = value;
}
}
dynamic func = currentFunction.BindedFunction;
lblResult.Text = "Formula Result = " + func(args).ToString();
}
public object Eval(Func <string, string[], object> onFormula, Dictionary <string, object> parameters, List <Tuple <FormulaNode, object> > trace = null)
{
object v = null;
if (Right != null)
{
var r = Right.Eval(onFormula, parameters, trace);
if (Operation == "f" && Left.Formula == "!")
{
v = !Convert.ToBoolean(r); //("!" + r).ToLower().GetValue<bool>();
}
else if (Operation == "f" && Left.Formula == "+")
{
v = Convert.ToDecimal(r);
}
else if (Operation == "f" && Left.Formula == "-")
{
v = -Convert.ToDecimal(r);
}
else if (Operation == "f" && onFormula != null)
{
v = onFormula(Left.Formula, (r + "").Split(","));
}
else if (Operation == "f")
{
v = new JSEval().Eval("System.Math." + CultureInfo.CurrentCulture.TextInfo.ToTitleCase(Left.Formula) + "(" + r + ")"); //("System.Math." + CultureInfo.CurrentCulture.TextInfo.ToTitleCase(Left.Formula) + "(" + r + ")").GetValue<decimal>(); //hack просто Math. нельзя, т.к. будет использоваться JScript.Math
}
if (v == null)
{
var l = Left.Eval(onFormula, parameters, trace);
if (Operation == "+")
{
if (r is string || l is string)
{
v = "" + l + r;
}
else
{
v = Convert.ToDecimal(l) + Convert.ToDecimal(r);
}
}
else if (Operation == "-")
{
v = Convert.ToDecimal(l) - Convert.ToDecimal(r);
}
else if (Operation == "*")
{
v = Convert.ToDecimal(l) * Convert.ToDecimal(r);
}
else if (Operation == "/")
{
v = Convert.ToDecimal(l) / Convert.ToDecimal(r);
}
else if (Operation == "^")
{
v = Math.Pow(Convert.ToDouble(l), Convert.ToDouble(r));
}
//для Eval сойдёт и строковое представление параметроов
else if (Operation == ",")
{
v = (((l is bool || l is string) ? l : Convert.ToDecimal(l).ToString(CultureInfo.InvariantCulture)) + ","
+ ((r is bool || r is string) ? r : Convert.ToDecimal(r).ToString(CultureInfo.InvariantCulture))).ToLower();
}
if (v == null)
{
var lr = Left.GetRightVal(onFormula, parameters, trace);
var rl = Right.GetLeftVal(onFormula, parameters, trace);
if (lr is string || rl is string)
{
v = new JSEval().Eval("'" + lr + "'" + (Operation == "=" ? "==" : (Operation == "<>" ? "!=" : Operation)) + "'" + rl + "'");
}
else if (Operation == "<")
{
v = Convert.ToDecimal(lr) < Convert.ToDecimal(rl) && (!(l is bool) || (bool)l) && (!(r is bool) || (bool)r);
}
else if (Operation == ">")
{
v = Convert.ToDecimal(lr) > Convert.ToDecimal(rl) && (!(l is bool) || (bool)l) && (!(r is bool) || (bool)r);
}
else if (Operation == "<=")
{
v = Convert.ToDecimal(lr) <= Convert.ToDecimal(rl) && (!(l is bool) || (bool)l) && (!(r is bool) || (bool)r);
}
else if (Operation == ">=")
{
v = Convert.ToDecimal(lr) >= Convert.ToDecimal(rl) && (!(l is bool) || (bool)l) && (!(r is bool) || (bool)r);
}
else if (Operation == "=")
{
v = l is bool && r is bool?Convert.ToBoolean(l) == Convert.ToBoolean(r) : Convert.ToDecimal(lr) == Convert.ToDecimal(rl) && (!(l is bool) || (bool)l) && (!(r is bool) || (bool)r);
}
else if (Operation == "!=" || Operation == "<>")
{
v = l is bool && r is bool?Convert.ToBoolean(l) != Convert.ToBoolean(r) : Convert.ToDecimal(lr) != Convert.ToDecimal(rl) && (!(l is bool) || (bool)l) && (!(r is bool) || (bool)r);
}
else if (Operation == "&&" || Operation == "&")
{
v = Convert.ToBoolean(l) && Convert.ToBoolean(r);
}
else if (Operation == "||" || Operation == "|")
{
v = Convert.ToBoolean(l) || Convert.ToBoolean(r);
}
}
}
}
if (v == null)
{
if (parameters != null && parameters.ContainsKey(Formula))
{
return(parameters[Formula]);
}
var c = Formula[0]; if ((c == '\'' || c == '"') && Formula[Formula.Length - 1] == c)
{
return(Formula.Substring(1, Formula.Length - 2));
}
try { return(decimal.Parse(Formula, CultureInfo.InvariantCulture)); }
catch
{
try { return(bool.Parse(Formula)); }
catch (Exception ex) { throw new Exception("'" + Formula + "' is undefined.", ex); }
}
}
if (trace != null)
{
trace.Add(new Tuple <FormulaNode, object>(this, v));
}
return(v);
}
