c# - 将 WPF 中的对象序列化为 XML

Question

所以我正在使用 MVVM 在 WPF 中构建一个应用程序，我想将各种对象模型数据保存为 XML。使用Serialize an object to XML我可以正确地将对象序列化为 XML，但我遇到的问题是 MVVM 本身。
我无法在 ViewModel 代码的 ICommand 段内直接访问对象的模型(例如，当我点击保存时，它会转到 ViewModel 内的 ICommand 方法)。
我已将模型设置为可序列化问题，我只是无法将其直接传递给我的序列化方法(包含在它自己的静态帮助程序类中)，所以即使我没有收到“意外类型”的回复(因为 VieWModel 不可序列化)我最终会得到很多多余的垃圾，而不仅仅是被序列化的 Model 类。

我不确定我是否只是设计不正确，或者是否有更好的方法或...？

附言所有这些字段都被写入适当绑定(bind)的 TextBox 控件中。现在我只是尝试处理名称字段，以避免其他数据类型无法正常工作时出现任何类型的问题。

编辑:根据评论中的要求，现在的目标只是能够在几个文本框中写入一些文本(名字、中间名、姓氏)，然后将其保存到 XML 文件中。

有问题的总结模型:

namespace XMLaw.Model
{
    [Serializable]
    public class ClientModel
    {
        private string firstName { get; set; }
        private string middleName { get; set; }
        private string lastName { get; set; }
        private DateTime dateOfBirth { get; set; }
        private string ssn { get; set; } //Format: AA ## ## ## A, spaces optional
        private string address { get; set; }
        private string phone { get; set; }

        public event PropertyChangedEventHandler PropertyChanged;

        private void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        #region Name Properties
        public string FirstName
        {
            get { return firstName; }
            set
            {
                if( firstName != value )
                {
                    firstName = value;
                    OnPropertyChanged("FirstName");
                }
            }
        }
        public string MiddleName
        {
            get { return middleName; }
            set
            {
                if (middleName != value)
                {
                    middleName = value;
                    OnPropertyChanged("MiddleName");
                }
            }
        }
        public string LastName
        {
            get { return lastName; }
            set
            {
                if (lastName != value)
                {
                    lastName = value;
                    OnPropertyChanged("LastName");
                }
            }
        }
        #endregion

        public DateTime DateOfBirth
        {
            get { return dateOfBirth; }
            set
            {
                if ( dateOfBirth != value )
                {
                    DateTime dt = Convert.ToDateTime(value); //This will probably need to revisited since DateTime objects are fucking stupid
                    dateOfBirth = dt.Date;
                    OnPropertyChanged("DateOfBirth");
                }
            }
        }

        public string SSN
        {
            get { return ssn; }
            set
            {
                if( ssn != value)
                {
                    ssn = value;
                    OnPropertyChanged("SSN");
                }
            }
        }

        public string Address
        {
            get { return address; }
            set
            {
                if( address != value)
                {
                    address = value;
                    OnPropertyChanged("Address");
                }
            }
        }

        public string Phone
        {
            get { return phone; }
            set
            {
                if( phone != value )
                {
                    phone = value;
                    OnPropertyChanged("Phone");
                }
            }
        }

    }
}

和有问题的ViewModel(调用序列化的Save命令在底部)

namespace XMLaw.ViewModel
{
    public class ClientViewModel : INotifyPropertyChanged
    {
        private ClientModel client;
        private string displayMessage;
        private ICommand btnSave;

        public event PropertyChangedEventHandler PropertyChanged;
        private void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        public ClientViewModel()
        {
            client = new ClientModel();
        }

        public ClientModel ClientModel
        {
            get { return client; }
        }

        public string DisplayMessage
        {
            get { return displayMessage; }
            set
            {
                if( displayMessage != value)
                {
                    displayMessage = value;
                    OnPropertyChanged("DisplayMessage");
                }
            }
        }

        public ICommand SaveCommand
        {
            get
            {
                if (btnSave == null)
                    btnSave = new Save();
                return btnSave;
            }
            set { btnSave = value; }
        }

        protected class Save : ICommand
        {

            public bool CanExecute(object param) { return true; }
            public event EventHandler CanExecuteChanged; //Compiler yells at you if you don't implement this from inhereted ICommand
            public void Execute(object param)
            {
                ClientViewModel viewModel = (ClientViewModel)param;
                //TODO: Insert XML serialization and save to a file
                var xml = Helper.Serialize(param);


                //Placeholder to make sure the button works
                viewModel.DisplayMessage = "You clicked the button at " + DateTime.Now;
            }
        }


    }
}

还有我厚着脸皮从上面链接拿来的Serailization方法

public static class Helper
{
    public static string Serialize<T>(this T value)
    {
        if (value == null)
        {
            return string.Empty;
        }
        try
        {
            var xmlserializer = new XmlSerializer(typeof(T));
            var stringWriter = new StringWriter();
            using (var writer = XmlWriter.Create(stringWriter))
            {
                xmlserializer.Serialize(writer, value);
                return stringWriter.ToString();
            }
        }
        catch (Exception ex)
        {
            throw new Exception("An error occurred", ex);
        }
    }
}

Answer 1

将您的客户端模型更改为此:

[Serializable]
    public class ClientModel
    {
        private string firstName;
        private string middleName;
        private string lastName;
        private DateTime dateOfBirth;
        private string ssn;
        private string address;
        private string phone;


        public event PropertyChangedEventHandler PropertyChanged;

        private void OnPropertyChanged(string propertyName)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        #region Name Properties
        public string FirstName {
            get { return firstName; }
            set {
                if (firstName != value)
                {
                    firstName = value;
                    OnPropertyChanged("FirstName");
                }
            }
        }
        public string MiddleName {
            get { return middleName; }
            set {
                if (middleName != value)
                {
                    middleName = value;
                    OnPropertyChanged("MiddleName");
                }
            }
        }
        public string LastName {
            get { return lastName; }
            set {
                if (lastName != value)
                {
                    lastName = value;
                    OnPropertyChanged("LastName");
                }
            }
        }
        #endregion

        public DateTime DateOfBirth {
            get { return dateOfBirth; }
            set {
                if (dateOfBirth != value)
                {
                    DateTime dt = Convert.ToDateTime(value); //This will probably need to revisited since DateTime objects are fucking stupid
                    dateOfBirth = dt.Date;
                    OnPropertyChanged("DateOfBirth");
                }
            }
        }

        public string SSN {
            get { return ssn; }
            set {
                if (ssn != value)
                {
                    ssn = value;
                    OnPropertyChanged("SSN");
                }
            }
        }

        public string Address {
            get { return address; }
            set {
                if (address != value)
                {
                    address = value;
                    OnPropertyChanged("Address");
                }
            }
        }

        public string Phone {
            get { return phone; }
            set {
                if (phone != value)
                {
                    phone = value;
                    OnPropertyChanged("Phone");
                }
            }
        }

    }

用法:

 var xx = new ClientModel();
            xx.FirstName = "John";
            xx.LastName = "Smith";
            xx.DateOfBirth = DateTime.Now;

            var result = xx.Serialize();

结果:

http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\"> John Smith 2016-07-11T00:00:00+02:00

编辑:

这段代码:

public void Execute(object param)
            {
                ClientViewModel viewModel = (ClientViewModel)param;
                //TODO: Insert XML serialization and save to a file
                var xml = Helper.Serialize(param);


                //Placeholder to make sure the button works
                viewModel.DisplayMessage = "You clicked the button at " + DateTime.Now;
            }

应替换为:

public void Execute(object param)
            {
                ClientModel model= (ClientModel )param;
                //TODO: Insert XML serialization and save to a file
                var xml = Helper.Serialize(param);


                //Placeholder to make sure the button works
                viewModel.DisplayMessage = "You clicked the button at " + DateTime.Now;
            }

确保您的 Param 是 ClientModel 类型。

我也强烈建议您了解 how DataBinding works 的基础知识

编辑 2(命令之类的东西):

class Save : ICommand
    {
        public ClientModel Model { get; set; }
        public bool CanExecute(object param) { return true; }
        public event EventHandler CanExecuteChanged; //Compiler yells at you if you don't implement this from inhereted ICommand
        public void Execute(object param)
        {
            //TODO: Insert XML serialization and save to a file
            var xml = Helper.Serialize(this.Model);


            //Placeholder to make sure the button works
            viewModel.DisplayMessage = "You clicked the button at " + DateTime.Now;
        }
    }

用法:

public ICommand SaveCommand
        {
            get
            {
                if (btnSave == null)
                    btnSave = new Save();
btnSave.Model = this.ClientModel;

                return btnSave;
            }
            set { btnSave = value; }
        }