输出时去掉无效的0

Question

 string str = dt.Rows[i][j].ToString();
                                if (str.Contains(".") && str.EndsWith("0"))
                                {
                                    str = str.TrimEnd('0');
                                    str = str.TrimEnd('.');
                                    dt.Rows[i][j] = str;
                                }

Answer 1

嗯，如果没有小数点，不能这么做。需要判断，可以用正则表达式
string s1 = 1020;
string s2 = 1.020;
Console.WriteLine(Regex.Replace(s1, @"(?<=\d+\.\d+)0+"), "");
Console.WriteLine(Regex.Replace(s2, @"(?<=\d+\.\d+)0+"), "");