Adding to a list

John

Hi guys Ive been trying different ways in which one can add to a list and save up on lines of coding at the same time. Failing miserably however :(

What i am trying to do is have a feature where the user inputs 2 values via textboxes and then the system multiplies those values and adds random values to a list.

so if the values entered were 2 and 4 then the system should produce 8 random numbers and add them to a list.

Thanks guys!

6 Replies

Know the answer? Post it — somebody with the same question will find it here.

Vulpes14y ago
Accepted answer
It sounds to me like you're supposed to enter integers in the textboxes as you can, of course, only generate an integral number of random numbers.

However nothing is said about the random numbers themselves, whether they're integral or decimal and within what range. The following code assumes they're integers between 0 and 999 inclusive:

// declare at class level
private List lst = new List();
private Random rand = new Random();

// within some method
int val1 = Convert.ToInt32(txtval1.text);
int val2 = Convert.ToInt32(txtval2.Text);
int result = val1 * val2;
if (result < 1) return;
for(int i = 1; i <= result; i++) lst.Add(rand.Next(1000));
Vulpes14y ago
Even if the random numbers themselves are doubles, the numbers in the textboxes must be integers because you can't generate (for instance) 8.62 random numbers unless you're supposed to round off the result of the multiplication to the nearer whole number.
John14y ago
Will have a go now. Sam im alright with the first point is fine its the other three im baffled on. Everything is double because I want my random list to between the value of -0.5 to 0.5.
Sam Hobbs14y ago
Well John, you have two guesses. If either one is the answer then please mark it as the answer. If none of them is the answer then please clarify what you need.
Sam Hobbs14y ago
What do you need help with?
- getting 2 values via textboxes
- multiplying those values
- generating the number of random values
- adding the random values to a list
Krishna Garad14y ago
you can try this

on global level declare the list
List lst=new List();

in event where you want to multiply the values write

double val1=Convert.ToDouble(txtval1.text);
double val2=Convert.ToDouble(txtval2.Text);
double result=val1*val2;
lst.Add(result);