Question

I need to add arraylist of items in linq.Below is my sample code.

string[] _str = ("1.21,2.02,3.14,4.951,5.156").ToString().Split(',');
double Sum = 0.0;
for (int i = 0; i < _str.Length; i++)
{
  if (_str[i].ToString() != ",")
     Sum = Sum + Convert.ToDouble(_str[i]);
}

The above code i have done in for loop to get the sum of all items in the array list. I need to convert the same operation in linq.Please anyone help me solve this since i’m new to linq.

Thanks in advance.

Answer 1

string[] _str =  {"1.21","2.02","3.14","4.951","5.156"};
double Sum = 0.0;
for (int i = 0; i < _str.Length; i++)
{
    double.TryParse(_str[i],out val)
}

But if you are doing this for sake of learning linq

string[] _str = {"1.21","2.02","3.14","4.951","5.156"};
_str.Sum(x => 
    {  
       double val ; 
       if(double.TryParse(x, out val)){
         return val;
       }
       return 0.0;
    });

If you are sure that the string will always contain valid numeric strings. Then you can just use double.Parse(x).