public void Serialize_Deserialize_Evaluate_38()
{
ExpressionParser parser = new ExpressionParser();
string func = "x+y+z";
double expected = 38;
// Values
parser.Values.Add("x", 5);
parser.Values.Add("y", 10);
parser.Values.Add("z", 23);
// Parse
double value = parser.Parse(func);
Assert.AreEqual(expected, value);
// Get expression
Expression expression = parser.Expressions[func];
MemoryStream stream = new MemoryStream();
// Serialize
expression.Save(stream);
stream.Flush();
stream.Position = 0;
// Deserialize
expression = new Expression();
expression.Load(stream);
value = parser.EvalExpression(expression);
Assert.AreEqual(expected, value);
}
private void btnExecute_Click(object sender, EventArgs e)
{
// get Numbers collection
List<double[]> collectSet = collectNumbers();
// Parse Expression
ExpressionParser parser = new ExpressionParser();
parser.Values.Add("a", 1);
parser.Values.Add("b", 1);
parser.Values.Add("c", 1);
string func = tbFormula.Text;
parser.Parse(func);
Expression expression = parser.Expressions[func];
// Reset
if (statisticTable.Rows.Count > 0)
statisticTable.Rows.Clear();
dataView.RowFilter = "1=1";
foreach (double[] arr in collectSet)
{
parser.Values["a"].SetValue(arr[0]);
parser.Values["b"].SetValue(arr[1]);
parser.Values["c"].SetValue(arr[2]);
double result = parser.EvalExpression(expression);
DataRow row = statisticTable.NewRow();
row["NumberA"] = arr[0];
row["NumberB"] = arr[1];
row["NumberC"] = arr[2];
row["Result"] = Math.Round(result, 4);
statisticTable.Rows.Add(row);
}
// Fetch to DataGridView
//dataGridView.DataSource = statisticTable;
}
private void button1_Click(object sender, EventArgs e)
{
ExpressionParser oParser = new ExpressionParser();
oParser.RequireParentheses = chkParant.Checked;
oParser.ImplicitMultiplication = chkImplicit.Checked;
int iIterations = 1000;
try
{
iIterations = Int32.Parse(textBox4.Text.Trim());
}
catch
{
textBox4.Text = iIterations.ToString();
}
foreach (Control c in valuePanel.Controls)
{
VariableValue varVal = c as VariableValue;
if (varVal == null) continue;
if (String.IsNullOrEmpty(varVal.Variable)
|| String.IsNullOrEmpty(varVal.Value)) continue;
double val = 0;
if (Double.TryParse(varVal.Value, out val))
{
oParser.Values.Add(varVal.Variable, val);
}
else
{
oParser.Values.Add(varVal.Variable, varVal.Value);
}
}
string sFunction = textBox1.Text.Trim();
double fResult = 0f;
try
{
Cursor = Cursors.WaitCursor;
Stopwatch watch = new Stopwatch();
watch.Start();
// Parse expression once
fResult = oParser.Parse(sFunction);
// Fetch parsed tree
Expression expression = oParser.Expressions[sFunction];
// Iterate and evaluate tree
for (int i = 0; i < iIterations; i++)
{
fResult = oParser.EvalExpression(expression);
}
watch.Stop();
textBox2.Text = "Result: " + fResult + "\r\n";
textBox2.Text += "Iterations: " + iIterations + "\r\n";
textBox2.Text += "Time consumed: " + watch.ElapsedMilliseconds + " milliseconds.\r\n\r\n";
try
{
Assembly oAssembly = Assembly.LoadFrom("info.lundin.math.dll");
textBox2.Text += String.Format("Assembly: {0}\r\n.NET Runtime: {1}", oAssembly.FullName, oAssembly.ImageRuntimeVersion);
}
catch { }
}
catch (Exception ex)
{
textBox2.Text = ex.Message;
}
finally
{
Cursor = Cursors.Default;
}
}
