TryParse failing with negative numbers
Question
I'm having a problem getting TryParse to work correctly for me. I have a list of values that I am almost assured are valid (as they come from another component in our system) but I would like to make sure there is proper error handling in place.
Here is an example list of my values:
20.00
20.00
-150.00
And here is the method I originally wrote:
private decimal CalculateValue(IEnumerable<XElement> summaryValues)
{
decimal totalValue = 0;
foreach (XElement xElement in summaryValues)
{
decimal successful;
Decimal.TryParse(xElement.Value, out successful);
if (successful > 0)
totalValue += Decimal.Parse(xElement.Value);
}
return totalValue;
}
The variable 'successful' was returning false for -150.00, so I added NumberStyles:
private decimal CalculateValue(IEnumerable<XElement> summaryValues)
{
decimal totalValue = 0;
foreach (XElement xElement in summaryValues)
{
decimal successful;
Decimal.TryParse(xElement.Value, NumberStyles.AllowLeadingSign, null, out successful);
if (successful > 0)
totalValue += Decimal.Parse(xElement.Value, NumberStyles.AllowLeadingSign);
}
return totalValue;
}
However, now that I have the NumberStyles in there, none of the numbers will parse! I feel good about having IFormatProvider set to null as this is all within our system. Does anyone see what I may be doing wrong?
No correct solution
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