public string parseVariableFormula(List<Variable> allVariables, List<Variable> treeVariables)
{
if (treeVariables.Contains(this))
return "Recursive variable reference detected.";
treeVariables.Add(this);
Dictionary<string, Variable> variableNames = new Dictionary<string, Variable>();
foreach (Variable var in allVariables)
{
if (variableNames.ContainsKey(var.VariableName))
variableNames[var.VariableName] = null;
else
variableNames.Add(var.VariableName, var);
}
dotMath.EqCompiler eq = new dotMath.EqCompiler(variableFormula, true);
// eq.AddFunction(new CPow());
try
{
eq.Compile();
}
catch (Exception e)
{
return e.Message;
}
string[] usedVariables = eq.GetVariableList();
if (usedVariables != null)
{
if (usedVariables.Length != 0)
{
for (int i = 0; i < usedVariables.Length; i++)
{
if (!variableNames.ContainsKey(usedVariables[i]))
{
VariableValue = 0;
return "Unable to parse formula. There is no variable named " + usedVariables[i] + ".";
}
if (variableNames[usedVariables[i]] == null)
{
VariableValue = 0;
return "Unable to parse formula. There are multiple variables named " + usedVariables[i] + ".";
}
Variable currentVar = variableNames[usedVariables[i]];
if (currentVar.DerivedVariable)
{
string err = currentVar.parseVariableFormula(allVariables, treeVariables);
if (err != null)
{
VariableValue = 0;
return err;
}
}
eq.SetVariable(usedVariables[i], currentVar.VariableValue);
}
}
}
try
{
this.VariableValue = eq.Calculate();
}
catch (Exception e)
{
VariableValue = 0;
return e.Message;
}
treeVariables.Remove(this);
return null;
}
private string parseVariableFormula(List <Variable> allVariables, List <Variable> treeVariables)
{
if (treeVariables.Contains(this))
{
return(EQUATION_ERROR_RECURSIVE);
}
treeVariables.Add(this);
Dictionary <string, Variable> variableNames = new Dictionary <string, Variable>();
foreach (Variable var in allVariables)
{
if (variableNames.ContainsKey(var.VariableName))
{
variableNames[var.VariableName] = null;
}
else
{
variableNames.Add(var.VariableName, var);
}
}
dotMath.EqCompiler eq = new dotMath.EqCompiler(variableFormula, true);
// eq.AddFunction(new CPow());
try
{
eq.Compile();
}
catch (Exception e)
{
return(e.Message);
}
string[] usedVariables = eq.GetVariableList();
if (usedVariables != null)
{
for (int i = 0; i < usedVariables.Length; i++)
{
if (!variableNames.ContainsKey(usedVariables[i]))
{
VariableValue = 0;
return("Unable to parse formula. There is no variable named " + usedVariables[i] + ".");
}
if (variableNames[usedVariables[i]] == null)
{
VariableValue = 0;
return("Unable to parse formula. There are multiple variables named " + usedVariables[i] + ".");
}
Variable currentVar = variableNames[usedVariables[i]];
if (currentVar.DerivedVariable)
{
string err = currentVar.parseVariableFormula(allVariables, treeVariables);
if (err != null)
{
VariableValue = 0;
return(err);
}
}
eq.SetVariable(usedVariables[i], currentVar.VariableValue);
}
}
try
{
this.VariableValue = eq.Calculate();
}
catch (Exception e)
{
VariableValue = 0;
return(e.Message);
}
treeVariables.Remove(this);
return(null);
}
