Vishal Vishal - 1 year ago 137
C# Question

How to convert list of strings to doubles?

EDIT : I had tried these two ways before -

List<double> doubleList =
stringList.ConvertAll(x => (double)x);

List<double> doubleList =
stringList.Select(x =>

and got this error:

Cannot convert type 'string' to'double'

I read about something similiar that convert ints to doubles...but I have List of strings which I need to convert to List of doubles and the ConvertAll() does not work neither the Select extension method. Can anyone please help me out.

Answer Source

The select method ought to work if you are using .NET 3.5 or newer:

List<double> result = l.Select(x => double.Parse(x)).ToList();

Here is some example code:

List<string> l = new List<string> { (0.1).ToString(), (1.5).ToString() };
List<double> result = l.Select(x => double.Parse(x)).ToList();
foreach (double x in result)



One thing to be aware of is which culture you are using to parse the strings. You might want to use the Parse overload that takes a culture and use CultureInfo.InvariantCulture for example.

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