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.NET Forum / Languages / C# / December 2005TryParse with HexNumber returning wrong value
Ok, Someone tell me what I'm doing wrong. The statement below is returning 527.0 in v, instead of the expected 215. Am I missing something? double v; if (Double.TryParse("0d7", NumberStyles.HexNumber, NumberFormatInfo.InvariantInfo, out v)) { ...... } Thanks, Greg Greg, It's not returning anything for me, actually, it throws an exception. In .NET 2.0, you can not use the hex modifier on floating point values. If you are using .NET 2.0, then I would recommend using the TryParse method on the Int32 structure. If not, then I would call the Parse method, and catch the exception. Then I would convert the int to a double through a cast. Hope this helps.  Signature- Nicholas Paldino [.NET/C# MVP] - mvp@spam.guard.caspershouse.com > Ok, Someone tell me what I'm doing wrong. The statement below is > returning 527.0 in v, instead of the expected 215. Am I missing [quoted text clipped - 11 lines] > > Greg That's interesting. I thought I was on .NET 2.0. I'll have to upgrade that. Did you get it to work properly using the Int32 structure, or did you try? I'll get my .NET upgraded and try the Int32. Thanks. >Greg, > [quoted text clipped - 8 lines] > > Hope this helps. Greg, It worked fine when I ran this using the TryParse method on Int32. Signature- Nicholas Paldino [.NET/C# MVP] - mvp@spam.guard.caspershouse.com > That's interesting. I thought I was on .NET 2.0. I'll have to > upgrade that. Did you get it to work properly using the Int32 [quoted text clipped - 16 lines] >> >> Hope this helps. Well, I thought there was a reason I had not upgraded to .NET 2.0; VS 2003 won't use it. So, I'll just catch a parse exception. Th'at's probably all the TryParse does, anyway. On a side note, I did think it was odd to provide a hex conversion for a double. Thanks for you help. Greg >Greg, > > It worked fine when I ran this using the TryParse method on Int32. Greg, Actually, the TryParse does not just catch the exception. The whole point of the TryParse method is to reduce the overhead involved with having to catch an exception if the string can not be parsed. Signature- Nicholas Paldino [.NET/C# MVP] - mvp@spam.guard.caspershouse.com > Well, I thought there was a reason I had not upgraded to .NET 2.0; VS > 2003 won't use it. [quoted text clipped - 12 lines] >> >> It worked fine when I ran this using the TryParse method on Int32. Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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