WPF Datagrid刷新显示成员路径为空 [英] WPF Datagrid refresh Displaymember path empty

问题描述

我想刷新我的DataGrid并在网络上找到以下代码：

  dataGridView.ItemsSource = null; 
 dataGridView.ItemsSource = ItemsSourceObjects; 
  

除了字符串/列之外它还有效名称不会与对象一起显示对象/

编辑：

 < DataGridTextColumn Binding ={Binding TId}Header =idMinWidth =20MaxWidth =60 /> 
< DataGridTextColumn Binding ={Binding TChassisManufacturer}Header =Project NameMinWidth =122MaxWidth =200/> 
< DataGridTextColumn Binding ={Binding ProjectStatusM}Header =StatusMinWidth =122MaxWidth =100/> 
  

解决方案

以下是一个示例：

您不需要调用刷新。当您从我的添加/删除项目时， dg 会自动更新。

XAML：

 < Window x：Class =MainWindow
 xmlns = http://schemas.microsoft.com/winfx/2006/xaml/presentation
 xmlns：x =http://schemas.microsoft.com/winfx/2006/xaml
 xmlns：local =clr-namespace：WpfApplication1> 
< DataGrid Name =dataGridViewItemsSource ={Binding}AutoGenerateColumns =False> 
< DataGrid.Columns> 
< DataGridTextColumn Binding ={Binding TId}Header =idMinWidth =20MaxWidth =60/> 
< DataGridTextColumn Binding ={Binding TChassisManufacturer}Header =Project NameMinWidth =122MaxWidth =200/> 
< DataGridTextColumn Binding ={Binding ProjectStatusM}Header =StatusMinWidth =122MaxWidth =100/> 
< /DataGrid.Columns> 
< / DataGrid> 
< / Window> 
  

C＃：

 code> public partial class MainWindow：Window 
 {
 ObservableCollection< myClass> my = new ObservableCollection< myClass>（）; 
 
 public MainWindow（）
 {
 InitializeComponent（）; 
 dataGridView.DataContext = my; 
 my.Add（new myClass {TId = 1，TChassisManufacturer =Sony，ProjectStatusM =Done}）; 
 my.Add（new myClass {TId = 2，TChassisManufacturer =Apple，ProjectStatusM =Doing}）; 
} 
} 
 
 class myClass：INotifyPropertyChanged 
 {
 public event PropertyChangedEventHandler PropertyChanged; 
 
 int id; 
 public int TId 
 {
 get 
 {
 return id; 
} 
 set 
 {
 id = value; 
 if（PropertyChanged！= null）PropertyChanged（this，new PropertyChangedEventArgs（TId））; 
} 
} 
 
字符串名称; 
 public string TChassisManufacturer 
 {
 get 
 {
返回名称; 
} 
 set 
 {
 name = value; 
 if（PropertyChanged！= null）PropertyChanged（this，new PropertyChangedEventArgs（TChassisManufacturer））; 
} 
} 
 
 string status; 
 public string ProjectStatusM 
 {
 get 
 {
 return status; 
} 
 set 
 {
 status = value; 
 if（PropertyChanged！= null）PropertyChanged（this，new PropertyChangedEventArgs（ProjectStatusM））; 
} 
} 
} 
  

I want to Refresh my DataGrid and found the following coding on the web:

dataGridView.ItemsSource = null;
dataGridView.ItemsSource = ItemsSourceObjects;

It does work except for the string/column Names does not get displayed with the objects only the objects/items itself.

Any Ideas on why this is happening?

EDIT:

 <DataGridTextColumn Binding="{Binding TId}" Header="id" MinWidth="20" MaxWidth="60"/>
 <DataGridTextColumn Binding="{Binding TChassisManufacturer}" Header="Project Name" MinWidth="122" MaxWidth="200"/>
 <DataGridTextColumn Binding="{Binding ProjectStatusM}" Header="Status" MinWidth="122" MaxWidth="100"/>

解决方案

Here is an example:

You don't need to call refresh. When you add/delete items from my, dg will auto update for you.

XAML:

<Window x:Class="MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication1">
    <DataGrid Name="dataGridView" ItemsSource="{Binding}" AutoGenerateColumns="False">
        <DataGrid.Columns>
            <DataGridTextColumn Binding="{Binding TId}" Header="id" MinWidth="20" MaxWidth="60"/>
            <DataGridTextColumn Binding="{Binding TChassisManufacturer}" Header="Project Name" MinWidth="122" MaxWidth="200"/>
            <DataGridTextColumn Binding="{Binding ProjectStatusM}" Header="Status" MinWidth="122" MaxWidth="100"/>
        </DataGrid.Columns>
    </DataGrid>
</Window>

C#:

public partial class MainWindow : Window
{
    ObservableCollection<myClass> my = new ObservableCollection<myClass>();

    public MainWindow()
    {
        InitializeComponent();
        dataGridView.DataContext = my;
        my.Add(new myClass { TId = 1, TChassisManufacturer = "Sony", ProjectStatusM = "Done" });
        my.Add(new myClass { TId = 2, TChassisManufacturer = "Apple", ProjectStatusM = "Doing" });
    }
}

class myClass : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    int id;
    public int TId
    {
        get
        {
            return id;
        }
        set
        {
            id = value;
            if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("TId"));
        }
    }

    string name;
    public string TChassisManufacturer
    {
        get
        {
            return name;
        }
        set
        {
            name = value;
            if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("TChassisManufacturer"));
        }
    }

    string status;
    public string ProjectStatusM
    {
        get
        {
            return status;
        }
        set
        {
            status = value;
            if (PropertyChanged != null) PropertyChanged(this, new PropertyChangedEventArgs("ProjectStatusM"));
        }
    }
}

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