WPF DataGrid中不顯示數據，但秀行

我試圖做一個簡單的WPF項目，我有一個問題： DataGrid綁定到一個ObservableCollection，它不顯示的數據，但它顯示了正確的它的外觀WPF DataGrid中不顯示數據，但秀行

這裏rows.Here的量是XAML：

<Window x:Class="008.MainWindow" 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
     xmlns:local="clr-namespace:008" 
     mc:Ignorable="d" 
     Title="MainWindow"> 

    <StackPanel> 
     <StackPanel Orientation="Horizontal" Margin="10"> 
      <Button Name="AddButton" HorizontalAlignment="Left" Margin="10">Add an element</Button> 
      <Button Name="DeleteOldButton" HorizontalAlignment="Left" Margin="10">Delete old files</Button> 
      <Button Name="ShowPop" HorizontalAlignment="Left" Margin="10">Show most popular element</Button> 
     </StackPanel> 

     <DataGrid Name="dgrid" CanUserResizeColumns="True" 
        CanUserAddRows="False" 
        IsReadOnly="True" 
        DataContext="files" 
        ItemsSource="{Binding}" 

        Width="Auto"> 
      <DataGrid.Columns> 
       <DataGridTextColumn Header="Name" Binding="{Binding Name}"/> 
       <DataGridTextColumn Header="Date created" Binding="{Binding Created}"/> 
       <DataGridTextColumn Header="Times Open" Binding="{Binding TimesOpen}"/> 

      </DataGrid.Columns> 
     </DataGrid> 

    </StackPanel> 
</Window>

而這裏的代碼：

public partial class MainWindow : Window 
    { 
    ObservableCollection<File> files; 

    public MainWindow() 
    { 

     InitializeComponent(); 
     files = new ObservableCollection<File>(); 
     files.Add(new File("r", DateTime.Now)); 
     files.Add(new File("o", DateTime.Now)); 
     files.Add(new File("a", DateTime.Now)); 
     files.Add(new File("d", DateTime.Now)); 

    } 

}

我已經嘗試了窗口的DataContext設置爲文件，也沒有工作

UPD：這裏的文件類：

class File 
    { 
     public string Name { get; set; } 
     public DateTime Created { get; set; } 
     public int TimesOpen { get; set; } 

     public File(string s, DateTime d) 
     { 
      Created = d; 
      Name = s; 
      TimesOpen = 0; 
     } 
     public void Open() 
     { 
      TimesOpen++; 
     } 
    }

UPD：實現了INotifyPropertyChanged的。沒有幫助。該文件定義如下：

class File: INotifyPropertyChanged 

    { 
     public event PropertyChangedEventHandler PropertyChanged; 
     private string name; 
     public string Name 
     { 
      get { return name; } 
      set 
      { 
       if (!value.Equals(name,StringComparison.InvariantCulture)) { 
        OnPropertyChanged("Name"); 
        name = value; 
       }      
      } 

     } 
     private DateTime created; 
     public DateTime Created 
     { 
      get { return created; } 
      set 
      { 
       if (!created.Equals(value)) 
       { 
        OnPropertyChanged("Created"); 
        created = value; 
       } 
      } 
     } 
     private int times_open; 
     public int TimesOpen 
     { 
      get { return times_open; } 
      set 
      { 
       if (times_open != value) 
       { 
        OnPropertyChanged("TimesOpen"); 
        times_open = value; 
       } 
      } 
     } 

     public File(string s, DateTime d) 
     { 
      Created = d; 
      Name = s; 
      TimesOpen = 0; 
     } 

     void OnPropertyChanged(string name) 
     { 
      if (PropertyChanged != null) 
      { 
       PropertyChanged(this, new PropertyChangedEventArgs(name)); 
      } 
     } 

     public void Open() 
     { 
      TimesOpen++; 
     } 
    } 
}

來源

2015-12-14 small-j

你能告訴我們文件類型的定義嗎？ –

是的，當然，請參閱UPD –

您是否嘗試過使文件實現INotifyPropertyChanged？把它放在Name，Created和TimeOpen屬性上。 –

有你做錯了一些事情 - 你應該設置的datacontext爲窗口
- 你的項目源爲界的文件。但等待..
- 文件需要在你的DataContext屬性，即主窗口
- 另外，你應該想想你的模型

<DataGrid Name="dgrid" CanUserResizeColumns="True" 
     CanUserAddRows="False" 
     IsReadOnly="True" 
     ItemsSource="{Binding Files}" 
     Width="Auto"> 

    <DataGrid.Columns> 
     <DataGridTextColumn Header="Name" Binding="{Binding Name}"/> 
     <DataGridTextColumn Header="Date created" Binding="{Binding Created}"/> 
     <DataGridTextColumn Header="Times Open" Binding="{Binding TimesOpen}"/> 
    </DataGrid.Columns> 
</DataGrid>

在你的代碼執行INotifyPropertyChanged的使用背後

public partial class MainWindow : Window 
{ 
    public ObservableCollection<File> Files {get; set;} 


    public MainWindow() 
    { 

     InitializeComponent(); 
     DataContext = this; 
     Files = new ObservableCollection<File>(); 
     Files.Add(new File("r", DateTime.Now)); 
     Files.Add(new File("o", DateTime.Now)); 
     Files.Add(new File("a", DateTime.Now)); 
     Files.Add(new File("d", DateTime.Now)); 
     Files.Add(new File("d", DateTime.Now)); 
     Files.Add(new File("d", DateTime.Now)); 
    } 
}

來源

2015-12-14 19:37:53 amuz

實施INotifyPropertyChanged，嘗試設置DataContext這兩個文件，使文件公共屬性 - 什麼都沒有 –

@ small-j不，你不應該設置datacontext文件。如上所示，在mainwindow的構造函數中將datacontext設置爲this。然後您將ItemsSource設置爲文件。你可以複製上面的代碼。你甚至不需要實現INotifyPropertyChanged來查看網格中的數據。當您想要稍後通知UI數據更改時，INotifyPropertyChanged會很有用。 – amuz

謝謝大家 –

試試這個.. MainWindow.xaml.cs：

public partial class MainWindow : Window 
{ 
    public MainWindow() 
    { 

     InitializeComponent(); 
     Files = new ObservableCollection<File>(); 
     Files.Add(new File("r", DateTime.Now)); 
     Files.Add(new File("o", DateTime.Now)); 
     Files.Add(new File("a", DateTime.Now)); 
     Files.Add(new File("d", DateTime.Now)); 
     DataContext = this; 
    } 
} 

public ObservableCollection<File> Files { get; set; }

MainWindow.xaml（snippet）：

<DataGrid Name="dgrid" CanUserResizeColumns="True" 
        CanUserAddRows="False" 
        IsReadOnly="True" 
        ItemsSource="{Binding Files}" 
        Width="Auto"> 
    <DataGrid.Columns> 
     <DataGridTextColumn Header="Name" Binding="{Binding Name}"/> 
     <DataGridTextColumn Header="Date created" Binding="{Binding Created}"/> 
     <DataGridTextColumn Header="Times Open" Binding="{Binding TimesOpen}"/> 
    </DataGrid.Columns> 
</DataGrid>

來源

2015-12-14 19:38:12 Borophyll

WPF DataGrid中不顯示數據，但秀行

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