When I Concatenate Two Decimal Variables It Shows Error Input String Was Not In Correct Format ?

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C#

string vbn = chrs1 + "." + chm1;
                    double sh = Convert.ToDouble(vbn);
                    string chm1str = chm1.ToString();
                    string chmstr = chm.ToString();
                    chmstr = chmstr.Substring(Math.Max(0, chmstr.Length - 1));
                    chm1str = chm1str.Substring(Math.Max(0, chm1str.Length - 1));

                    string s = chrs1 + "." + chm1;
                    totaltimeptod = Decimal.Round(Convert.ToDecimal(s), 2, MidpointRounding.AwayFromZero);

                    totaltime = Convert.ToDecimal(chrs + "." + chm);

Posted 18-Jan-16 22:19pm

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CPallini 19-Jan-16 4:24am

What is the offending line? What are the input values? Details, details, we need details, after all.

[no name] 19-Jan-16 4:35am

What is the input value of variables chrs1, chm1, chm, chrs

amagitech 19-Jan-16 4:42am

it's not clear.

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Sébastien Bancquart · Answer 1 · 2016-01-18T23:45:00

You write chm.ToString(), so I assume chm is not a string, but a decimal or other things.
You cannot concatenate strings and decimals in the same operation, there is a nonsense for the interpreter.
if you write chrs1 + "." . chm1, you MUST have chrs1 and chm1 defined as a string, because there is no implicit conversion between decimal and string.
You must write something like chrs1.ToString() + "." + chm1.ToString();
But be aware of some problems you can have, if chrs1 and chms1 are not integer...what will you do with the multiple dots in your string ?