public static void ReadEquation()
{
{
try
{
string equation = "(a4234) * (3) + 12432 + b123";
List <string> operands = FindOperands(expression: equation);
// Remove the numaric values
var variables = operands.Where(p => p.Any(char.IsLetter)).ToArray();
DataTable dt = new DataTable();
// create columns with type
dt.AddColumnsWithType(typeof(double), variables);
// add values
// right now adding 10 random values
for (int i = 0; i < 10; i++)
{
DataRow dr = dt.NewRow(); //Creating a New Row
for (int k = 0; k < variables.Length; k++)
{
dr[variables[k]] = (1 * i) + k;
}
dt.Rows.Add(dr); // Add the Row to the DataTable
}
dt.CreateSolutionColumn(equation, typeof(double));
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
}
public double[] Post([FromBody] Data value)
{
var table = JsonConvert.DeserializeObject <List <Dictionary <string, string> > >(value.JsonData);
var variables = GetVariablesName(value.Equation);
DataTable dt = new DataTable();
var tableColHeader = table[0].Select(tk => tk.Key).ToArray();
if (tableColHeader.Any(bs => !variables.Contains(bs)))
{
throw new Exception("header do not match with variables");
}
;
// create columns with type
dt.AddColumnsWithType(typeof(double), tableColHeader);
// add values
// right now adding 10 random values
for (int i = 0; i < table.Count; i++)
{
DataRow dr = dt.NewRow(); //Creating a New Row
var row = table[i];
for (int k = 0; k < variables.Length; k++)
{
dr[variables[k]] = row[variables[k]];
}
dt.Rows.Add(dr); // Add the Row to the DataTable
}
dt.CreateSolutionColumn(value.Equation, typeof(double), value.resultColName);
var result = Enumerable.Range(0, dt.Rows.Count).Select(p => (double)dt.Rows[p][value.resultColName]).ToArray();
return(result);
}