WPF Datagrid refresh Displaymember path empty

问题

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"/>

回答1:

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"));
        }
    }
}

来源：https://stackoverflow.com/questions/35576725/wpf-datagrid-refresh-displaymember-path-empty

标签

wpf

c#-4.0

datagrid

wpf-controls