Help: Can't format string using String.Format

roman_s

I cant seem to format my strAverageDensity which originally is in this example strAverageDensity = 30.000000123 using: string.Format("{0:0.00}", strAverageDensity); need it to equal 30.00 in this case but 2 decimal places instead its still strAverageDensity = 30.000000123 so this is the code:

            EditSubCategory E = new EditSubCategory();

                SubCategory C = GlobalContextManager.Instance.Cache.GetSubCategory((int)R.Cells\[0\].Value);
                Category CC = GlobalContextManager.Instance.Cache.GetCategory(C.CategoryId);

              string strAverageDensity = Convert.ToString(GlobalContextManager.Instance.Conversions.ConvertMetricWeightToDefault(C.AverageDensity));

                E.ParentCategory = CC;
                E.Category = C.Name;
                E.IsActivated = C.IsEnabled;
                E.OriginalCategory = C.Name;

                strAverageDensity = string.Format("{0:0.00}", strAverageDensity);
                E.AverageDensity = strAverageDensity;

Ennis Ray Lynch Jr

strAverageDensity should be of type float or double and not string to take advantage of numeric format strings.

Need custom software developed? I do custom programming based primarily on MS tools with an emphasis on C# development and consulting. I also do Android Programming as I find it a refreshing break from the MS. "And they, since they Were not the one dead, turned to their affairs" -- Robert Frost

OriginalGriff

Try:

strAverageDensity = string.Format("{0:0.00}", C.AverageDensity);

which I assume is a float / double. Strings do not use numeric formats!

Real men don't use instructions. They are only the manufacturers opinion on how to put the thing together.

Luc Pattyn

you failed to show an essential line of source code. Now compare yours to this:

		float f=30.01234f;
		log(string.Format("{0:0.00}", f));
		string s="30.01234";
		log(string.Format("{0:0.00}", s));

:)

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ignrod

As has already been pointed out, this format string works with numeric types. Why don't you try?

double dAverageDensity = Double.Parse(strAverageDensity);
strAverageDensity = String.Format("{0:0.00}", dAverageDensity);

Martin shooster

hi dear friend. i am a regular programmer,but i think :doh: this line of your program can be change string strAverageDensity = Convert.ToString(GlobalContextManager.Instance.Conversions.ConvertMetricWeightToDefault(C.AverageDensity)); instead of Convert.ToString(...) use of System.Convert.ToString(...). i hope success for you. M.Shooster

PIEBALDconsult

You could try Substring.... :-O

Luc Pattyn

substring is chopping strings, not rounding numbers. :)

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PIEBALDconsult

He seems to want to round a string.

Luc Pattyn

Yes it sure looks that way, although he never said it explicitly. So he should parse and either round or format, as ignrod suggested. :)

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PIEBALDconsult

Luc Pattyn wrote:

he should parse and either round or format

I disagree. :-D