System.IndexOutOfRangeException in c# window form - loops

Question

I have been trying too parse 2 parameter using for loop but it only loop once and locates one parameter. This is my code.
By providing rectangle 70,80 command in the form, I am trying to draw shapes but while passing through check variable for loop works only once. It does not increments but returns value only after first execution then goes to check number of parameter then rejects with error Array out of bounds.
public String[] ParameterSplit;
public IDictionary<string, int> VariableDictionary = new Dictionary<string, int>();
public IDictionary<string, int> MethodVariableDictionary = new Dictionary<string, int>();
public Boolean AlreadyInArray = false;
public Boolean Value1IsVariable = false;
public Boolean Value2IsVariable = false;
public int value = 0;
public int value1 = 0;
public int value2 = 0;
public CommandParser()
{
}
//This method is used for the validation of commands and parameters which passes thorough
//singleline command and multiline command method
public string[] CommandParsers(string input, int lineCount)
{
string[] text = { };
string[] inputcommand = input.Split(',', ' ');
if (inputcommand[0].ToUpper() == "MOVETO")
{
if(inputcommand.Length < 4)
{
Convert.ToInt32(inputcommand[1]);
Convert.ToInt32(inputcommand[2]);
text = inputcommand;
}
}
else
{
if (inputcommand[0].ToUpper() == "DRAWTO")
{
if (inputcommand.Length == 3)
{
Convert.ToInt32(inputcommand[1]);
Convert.ToInt32(inputcommand[2]);
text = inputcommand;
}
else
{
MessageBox.Show($"ERROR: Provide correct parameter for moveto in line no {lineCount}");
string[] strings = { "moveto,100,100" };
text = strings;
}
}
else if (inputcommand[0].ToUpper() == "RECTANGLE")
{
ParameterSplit = inputcommand[1].Split(",".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
CheckForVariable();
if (ParameterSplit.Length == 2)
{
}
else
{
Convert.ToInt32(ParameterSplit[0]);
Convert.ToInt32(ParameterSplit[1]);
text = ParameterSplit;
}
}
else if (inputcommand[0].ToUpper() == "CIRCLE")
{
if (inputcommand.Length == 2)
{
Convert.ToInt32(inputcommand[1]);
text = inputcommand;
}
else
{
MessageBox.Show("ERROR: Provide correct parameter for circle in line no " + lineCount );
string[] strings = { "circle,20" };
text = strings;
}
}
else if (inputcommand[0].ToUpper() == "TRIANGLE")
{
if (inputcommand.Length == 3)
{
Convert.ToInt32(inputcommand[1]);
Convert.ToInt32(inputcommand[2]);
text = inputcommand;
}
else
{
MessageBox.Show("ERROR: Provide correct parameter for triangle in line no "+ lineCount);
string[] strings = { "triangle,20,60" };
text = strings;
}
}
else if (inputcommand[0].ToUpper() == "PEN")
{
Pen = true;
string[] validateinput = { "pen", inputcommand[1] };
text = validateinput;
switch (inputcommand[1])
{
case "red":
color = Color.Red;
break;
case "blue":
color = Color.Blue;
break;
case "yellow":
color = Color.Yellow;
break;
case "green":
color = Color.Green;
break;
case "violet":
color = Color.Violet;
break;
}
}
else if (inputcommand[0].ToUpper() == "FILL")
{
string[] validateinput = { "fill", inputcommand[1] };
text = validateinput;
switch (inputcommand[1])
{
case "on":
fill = true;
break;
case "off":
fill = false;
break;
}
}
else if (inputcommand.Length > 2)
{
text = inputcommand;
//checks if the middle element is a "="
if(inputcommand[1].ToUpper() == "=")
{
//check if the variable is already stored or not
//StoreVarialable();
foreach(KeyValuePair<string,int> variable in VariableDictionary)
{
if (variable.Key.Equals(inputcommand[0]))
{
AlreadyInArray = true;
}
}
foreach(KeyValuePair<string,int> variable in VariableDictionary)
{
if(variable.Key.Equals(inputcommand[2]))
{
value1 = variable.Value;
Value1IsVariable = true;
}
}
if(inputcommand.Length.Equals(5))
{
foreach(KeyValuePair<string,int> variable in VariableDictionary)
{
if (variable.Key.Equals(inputcommand[4]))
{
value2 = variable.Value;
Value2IsVariable = true;
}
}
if (AlreadyInArray)
{
VariableDictionary.Remove(inputcommand[0]);
}
}
try
{
if (Value1IsVariable.Equals(false))
{
value1 = Convert.ToInt32(inputcommand[2]);
}
if (Value2IsVariable.Equals(false))
{
if (inputcommand.Length.Equals(5))
{
value2 = Convert.ToInt32(inputcommand[4]);
}
}
if (inputcommand.Length > 3)
{
if (inputcommand[3].Equals("+"))
{
value = value1 + value2;
}
else if (inputcommand[3].Equals("-"))
{
value = value1 - value2;
}
else
{
//InvalidOperator();
}
}
else
{
try
{
value = int.Parse(inputcommand[2]);
}
catch (FormatException ex)
{
//If it is not an integer throw an error
//ValueIsIncorrect();
}
}
//Adds the variable with the inputted value if it is an integer
// VariableDictionary.Add(inputcommand[0], value);
}
catch (FormatException ex)
{
//If it is not an integer throw an error
//ValueIsIncorrect();
//return;
}
}
else
{
}
}
else
{
string[] validateinput = { "error" };
text = validateinput;
}
//end of condition
}
return text;
}
public void CheckForVariable()
{
//Loops through all the parameters
for (int i = 0; i<ParameterSplit.Length ; i++)
{
int index = i;
try
{
//Checks if the parameter is an int
int test = int.Parse(ParameterSplit[index]);
}
catch
{
Boolean foundVariable = false;
foreach (KeyValuePair<string, int> variable in MethodVariableDictionary)
{
if (variable.Key.Equals(ParameterSplit[index]))
{
//if it is then assign the parameter the integer value of the variable
ParameterSplit[index] = variable.Value.ToString();
//ErrorList = ErrorList + variable.Key + ParameterSplit[i] + Environment.NewLine; ;
foundVariable = true;
}
}
if (foundVariable == false)
{
//if it is not then loop through the VariableDictionary to check if the parameter is a variable name
foreach (KeyValuePair<string, int> variable in VariableDictionary)
{
if (variable.Key.Equals(ParameterSplit[i]))
{
//if it is then assign the parameter the integer value of the variable
ParameterSplit[i] = variable.Value.ToString();
}
}
}
}
}
}
//This method is used to get the color from pen by returning its values
internal Color getColor()
{
return color;
}
}
I tried this where I have to check 2 parameter using for loop inside CheckForVariable method