Converting a string to a number

Question

Parsing some XML-files to use in databses.
One of the data is a persons height.
In files it is given in feet - like 5.58.
Convert.ToDouble(), double.Parse() and double.TryParse() all return 558 - which is not correct.
I have tried with both single and double as the type - and the result is the same. Conversion pretents there is no decimal point.

Anybody has any idea, why this simple task is not possible in Visual Studio 2015?

Rafnas T P · Answer

what is the data type for Person.Height?

Birger Sørensen · Answer

Removed VS 2015 and installed VS 2017 instead. Same problem (also can still not find tables in database, other than inside the IDE). Inserted a test: Person.Height = Double.Parse("5.58"); It still returns the number 558 If I write Person.Height = 5.58; everything is just fine; Person.Height IS = 5.58 So C sharp inside Viusal Studio appears to be C not very sharp...

Birger Sørensen · Answer

Yes. I also could split the string at the . and calculate the value myself, as it seems C# can only convert strings to integers, and has a multitude of different build in functions, that are supposed to domething else, but does just that. And I could invent a deep platter for my soup and hot water for my badth... Sorry...

Rafnas T P · Answer

you can try decimal also

Birger Sørensen · Answer

Person.Height is currently type Double Have tried float and Singe as well. Visual Studios version of C#, does not seem to accept float - it points to definition of type Single. Which actually is why I decided on double, as float would/should be adequate.....

Birger Sørensen · Answer

example snippets from XML (3000 files, some with more than one instance) 5.58 5.41 5.84 I do like this: Person.Height = double.Parse(ParseFileText("height", source, len)); // double.TryParse(ParseFileText("height", source, len), out Girl.Height); // Person.Height = Convert.ToDouble(ParseFileText("height", source, len)); @Rafnas - I have 3000+ that does this. So yes it does. I am aware, it shouldn't - which doesn't mean that what IS happening doesn't. Which in turn is why I ask here .... (I did try again, after you saying it is not possible - but it still does not do as you tell it to) Person is a struct, that also holds, name, age, address and other data. weight and year of birth are otheres - these are integers, that come out right. I use this function [debug version]: private String ParseFileText(String param, String source, int len) { String ret = ""; int beg = source.IndexOf(param + ">", len) + 1 + param.Length; int lgt = source.IndexOf(" if (lgt > 0) { ret = source.Substring(beg, lgt); } return ret; } Non debug version looks like this: private String ParseFileText(String param, String source, int len) { int beg = source.IndexOf(param + ">", len) + 1 + param.Length; int lgt = source.IndexOf(" return (lgt > 0) ? source.Substring(beg, lgt) : ""; } Which not surprisingly gives the exact same erroneous results in struct Person.

Rafnas T P · Answer

there is no way , you will be getting same output with decimal when you convert string with decimal places, please check your XML file what value exactly stored . it may be 558 not 5.58.

Vaibhav Deshmukh · Answer

Hi Birger, If you try below code it definately gives you expected output. double mySampleVariable1= Convert.ToDouble("5.58"); //String to double double mySampleVariable2= Convert.ToDouble(5.58f); //float to double

Nitin Sontakke · Answer

Could you please share the relevant portion of xml and piece of code you are using for the conversion?