Question

我正在尝试创建一个datagrid，其中的条目具有来自json的属性。问题是应该根据json中的信息动态生成许多属性。

我尝试的第一件事就是用他们自己的吸气剂来制作一个很长的所有可能属性列表。 seters。但这是一个非常长的列表，感觉应该有一个自动解决方案来解决这个问题。这包含在Datagrid Entry View Model的末尾。所以我可以在以下情况下绑定到Number：

Number = obj.NUMBER;

之后我研究了动态类型和expandoObjects。我了解到，显然不可能将WPF绑定到expandoObject的扩展属性。所以我无法绑定到expando.Number

expando.Number = obj.NUMBER

我还尝试按照创建帮助程序类的this示例来帮助进行绑定，但我似乎无法使其工作。当我运行我的解决方案时，我收到一个错误，指出属性“Numberz”不存在。所以我无法绑定到Numberz：

AddProperty("Numberz", typeof(string));
SetPropertyValue("Numberz", obj.NUMBER);

目前我没有想法，所以如果这里有人能提供帮助，我将非常感激。也许还有一些最后的笔记。我不是一个非常有经验的程序员，我正在尝试使用MVVM模式。

数据网格条目视图模型

public class DatagridEntryViewModel：ICustomTypeProvider，INotifyPropertyChanged { #region Fields

    /// <summary>
    /// Custom Type provider implementation - delegated through static methods.
    /// </summary>
    private readonly CustomTypeHelper<DatagridEntryViewModel> _helper = new CustomTypeHelper<DatagridEntryViewModel>();

    #endregion

    #region Constructor

    public DatagridEntryViewModel(ExitCoil model) 
    {
        _helper.PropertyChanged += (s, e) => PropertyChanged(this, e);

        dynamic Json = JObject.Parse(model.JsonCoilData);
        //CreationDatePost = Json.CREATION_DATE_S_POST;
        ////Number = Json.NUMBER;
        //CreationDatePost = Json.CREATION_DATE_S_POST;
        ////LeverageOrder = Json.LEVERAGE_ORDER;
        //Client = Json.CLIENT;
        //Skinned = Json.SKINNED;

        dynamic expando = new ExpandoObject();
        dynamic obj = JsonConvert.DeserializeObject<ExpandoObject>(Json.ToString());
        //AddProperty("Numberz", typeof(string));
        //SetPropertyValue("Numberz", obj.NUMBER);
        //expando.AddItem("Number");
        //expando[0] = obj.NUMBER;
        //Number = expando.Number;


        Model = model;

        //var settings = new JsonSerializerSettings();
        //settings.Converters.Add(new Models.DynamicJsonConverter());
        //var serializer = JsonSerializer.Create(settings);
        //JsonReader reader = new JsonTextReader(new StringReader(JsonString));

        //var Data = serializer.Deserialize<DynamicObject>(reader);
    }

    #endregion

    #region Model & proxy

    private ExitCoil _model;
    public ExitCoil Model
    {
        set { _model = value; }
    }

    #endregion

    #region Public Methods

    // Methods to support dynamic properties.
    public static void AddProperty(string name)
    {
        CustomTypeHelper<DatagridEntryViewModel>.AddProperty(name);
    }

    public static void AddProperty(string name, Type propertyType)
    {
        CustomTypeHelper<DatagridEntryViewModel>.AddProperty(name, propertyType);
    }

    public static void AddProperty(string name, Type propertyType, List<Attribute> attributes)
    {
        CustomTypeHelper<DatagridEntryViewModel>.AddProperty(name, propertyType, attributes);
    }

    public void SetPropertyValue(string propertyName, object value)
    {
        _helper.SetPropertyValue(propertyName, value);
    }

    public object GetPropertyValue(string propertyName)
    {
        return _helper.GetPropertyValue(propertyName);
    }

    public PropertyInfo[] GetProperties()
    {
        return _helper.GetProperties();
    }

    Type ICustomTypeProvider.GetCustomType()
    {
        return _helper.GetCustomType();
    }

    public event PropertyChangedEventHandler PropertyChanged = delegate { };
    private void RaisePropertyChanged([CallerMemberName] string propertyName = "")
    {
        PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }

    #endregion

    #region Properties

    //public string Number { get; private set; }

    //public string CreationDatePost { get; private set; }

    //public string LeverageOrder { get; private set; }

    public string Client { get; private set; }

    //public int OrderZnTop { get; private set; }

    //public int OrderZnBottom { get; private set; }

    //public string OrderAspect { get; private set; }

    //public string OderSideTrimming { get; private set; }

    //public string OrderPassivation { get; private set; }

    //public string OrderOilType { get; private set; }

    //public string OrderOilQuantity { get; private set; }


    #endregion

}

数据网格视图模型

public class DatagridViewModel : MainViewModelBase
    {
        #region Singleton

        public static DatagridViewModel Instance = new DatagridViewModel();

        #endregion

        #region Fields

        private ObservableCollection<DatagridEntryViewModel> _coilEntries = new ObservableCollection<DatagridEntryViewModel>();
        private readonly IViewManager _viewManager;
        private readonly IDockManager _dockManager;

        #endregion

        #region Properties

        public ObservableCollection<DatagridEntryViewModel> CoilEntries
        {
            get { return _coilEntries; }
            set
            {
                _coilEntries = value;
                RaisePropertyChanged(() => CoilEntries);
            }
        }

        public ProductionExitCoilReport Report { get; set; }

        #endregion

        #region Constructor

        public DatagridViewModel()
        {
            _viewManager = Globals.Container.Resolve<IViewManager>();
            _dockManager = Globals.Container.Resolve<IDockManager>();


            getReport();

            foreach (var Coil in Report.Coils)
            {
                CoilEntries.Add(new DatagridEntryViewModel(Coil));
            }
        }

        #endregion

        #region Methods

        public void getReport()
        {
            var proxy = new Proxy<IReportService>();
            proxy.Open();
            var LijnId = new LijnIdentificatie { Department = "HDG", Firm = "LIE", LineNumber = "05" };
            var Periode = new Period { FromDate = new DateTime(2017 - 11 - 10), FromShift = 1, ToDate = new DateTime(2017 - 11 - 10), ToShift = 1 };
            var request = new ProductionReportRequest() { LijnIdentificatie = LijnId, Period = Periode };
            Report = proxy.Service.GetProductionExitCoilReport(request);


        }

        #endregion
    }

Datagrid XAML

<DataGrid x:Class="Promo.Presentation.Views.CoilGrid"
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            xmlns:mc="http://schemas.openxmlformats.org/marukp-compatibility/2006" 
            xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
            xmlns:local="clr-namespace:Promo.Presentation.Views"
            xmlns:components="clr-namespace:Promo.Presentation.Components"
            xmlns:Data="clr-namespace:Promo.Presentation.ViewModels"
            AutoGenerateColumns="False"
            GridLinesVisibility="none"
            Background="White"
            Height="Auto"
            Width="Auto"
            MinWidth="500"
            MinHeight="500"
            DataContext="{x:Static Data:DatagridViewModel.Instance}"
            ItemsSource="{Binding CoilEntries}"
            IsReadOnly="True"
            HeadersVisibility="Column"
            Padding="10"
          >

    <DataGrid.Resources>
        <ResourceDictionary>
            <ResourceDictionary.MergedDictionaries>
                <ResourceDictionary Source="../Styles/Colors.xaml"/>
                <ResourceDictionary Source="../Styles/Datagrid.xaml"/>
            </ResourceDictionary.MergedDictionaries>
        </ResourceDictionary>
    </DataGrid.Resources>

    <DataGrid.Columns>
        <DataGridTextColumn Binding="{Binding Numberz}" Header="Rolnummer" MaxWidth="125"/>
        <DataGridTextColumn Binding="{Binding CreationDatePost}" Header="Post" MaxWidth="200"/>
        <DataGridTextColumn Binding="{Binding LeverageOrder}" Header="Leverage order" MaxWidth="200"/>
        <DataGridTextColumn Binding="{Binding Client}" Header="Client" MaxWidth="400"/>
        <DataGridTextColumn Binding="{Binding OrderZnTop}" Header="Order zinc top" MaxWidth="200"/>
        <DataGridTextColumn Binding="{Binding OrderZnBottom}" Header="Order zinc bottom" MaxWidth="200"/>
        <DataGridTextColumn Binding="{Binding OrderAspect}" Header="Order aspect" MaxWidth="125"/>
        <DataGridCheckBoxColumn Binding="{Binding OrderSideTrimming, Converter={local:StringToBoolConverter}}" Header="Order Side Trimming" MaxWidth="200"/>
        <DataGridTextColumn Binding="{Binding OrderPassivation}" Header="Order Passivation" MaxWidth="200"/>

        <DataGridCheckBoxColumn Binding="{Binding Skinned, Converter={local:StringToBoolConverter}}" Header="Skinned" MaxWidth="200"/>
    </DataGrid.Columns>

</DataGrid>

Json的一部分

{“NUMBER”：“G571015110”，“CREATION_DATE_S_POST”：“2017-05-11T00：00：00”“LEVERAGE_ORDER”：“FD72BIGA5W / 8”，“客户”：“ARCELORMITTAL BELGIUM SA”}

Answer 1

如果您拥有包含所有属性的json，那么Visual Studio可以为您生成类！不需要创造他们自己。我过去曾做过类似的情况，这是以前做过的要将json点击生成的类粘贴到要生成代码的.cs文件中，然后在Visual Studio菜单中单击Edit，接下来选择Paste Special，然后选择{ {1}}。
这应该会让你更容易。

Datagrid的动态/扩展条目

1 个答案: