我想将变量中的数据保存到 XML 文件中，并在重新启动程序后对其进行编码

Question

我想将变量保存在 XML 文件中，如果我再次启动程序，我想将保存的数据加载到程序/变量中。 我怎么能这样做？ ATM XML 已创建，但变量的数据始终以“0,0”保存。

见图片

        double fixcosts = 0.0;
        double costs = 0.0;
        Maths math = new Maths();

        int month = DateTime.Today.Month;

        if (month == 1)
        {

            XDocument January_costs_categories = new XDocument(new XDeclaration("1.0", "utf-8", "yes"),
                                                                new XElement("CostsCategories",
                                                                    new XElement("Fixcosts", fixcosts + " Euro"),
                                                                    new XElement("Costs", costs + " Euro")));


            Console.WriteLine("\n JANUARY COSTS \n");
            Console.WriteLine($"Fixcosts = {fixcosts}");
            Console.WriteLine($"Costs = {costs}");

            Console.WriteLine("\n\nHow much you wanna add?");
            double howMuch = Convert.ToDouble(Console.ReadLine());

            fixcosts = math.Addieren(fixcosts, howMuch);
            Console.Clear();

            Console.WriteLine("\n JANUARY COSTS \n");
            Console.WriteLine($"Fixcosts = {fixcosts}");
            Console.WriteLine($"Costs = {costs}");



            January_costs_categories.Save(@"C:\Users\tobia\Desktop\Neuer Ordner\fixcosts_january.xml");
        }
    }
}

}

Answer 1

您在分配变量之前创建了 XDocument。 将带有new XDocument(...的行移至调用Save()之前。