WPF Datagrid在行中有數據，但不顯示文本

Question

也許這是爲時已晚，我一直在看我的屏幕太久，但這真的讓我難住。我有datagrid顯示數據，但我加入了2個表後試圖顯示數據。數據在那裏，因爲我仍然可以使鼠標雙擊事件工作，但沒有文本顯示在任何列或行中。

這是XAML。

<DataGrid Grid.Column="1" Grid.Row="1" Name="ProjectsSubGrid" ItemsSource="{Binding}" 
      AutoGenerateColumns="False" IsReadOnly="True" 
      MouseDoubleClick="ProjectsSubGrid_MouseDoubleClick" 
      Initialized="ProjectsSubGrid_Initialized"> 
    <DataGrid.Columns> 
     <DataGridTextColumn Binding="{Binding Path=ProjectName}" Header="Project Name"/> 
     <DataGridTextColumn Binding="{Binding Path=AllottedHours}" Header="Allotted Hours"/> 
     <DataGridTextColumn Binding="{Binding Path=InvoicedHours}" Header="Invoiced Hours"/> 
     <DataGridTextColumn Binding="{Binding Path=UninvoicedHours}" Header="Uninvoiced Hours"/> 
     <DataGridTextColumn Binding="{Binding Path=RemainingHours}" Header="Remaining Hours"/> 
    </DataGrid.Columns> 
</DataGrid> 

這是我設置DataContext的C＃代碼。

private void ProjectsSubGrid_Initialized(object sender, EventArgs e) 
{ 
    var list = from p in ProjectManagement.Context.Project 
       join a in ProjectManagement.Context.Account 
       on p.AccountId equals a.AccountId 
       select new ProjectView(){ 
        AccountId = a.AccountId, 
        ProjectId = p.ProjectId, 
        ProjectName = p.ProjectName, 
        InvoicedHours = p.InvoicedHours, 
        AccountName = a.CompanyName, 
        AllottedHours = p.AllottedHours, 
        RemainingHours = p.RemainingHours, 
        UninvoicedHours = p.UninvoicedHours 
       }; 
    ProjectsSubGrid.DataContext = list; 
} 

它適用於我使用下面的代碼，但只要我切換到它打破的連接表。

ProjectsSubGrid.DataContext = ProjectManagement.Context.Project.Where(p=>true); 

任何幫助將不勝感激。

Answer 1

感謝大家在這裏的幫助。我想這只是我昨晚看屏幕太久而已。我沒有發佈ProjectView類的代碼，這是問題所在。

我寫

public class ProjectView 
{ 
    public int ProjectId; 
    public string ProjectName; 
    public int AccountId; 
    public string AccountName; 
    public int AllottedHours; 
    public int InvoicedHours; 
    public int UninvoicedHours; 
    public int RemainingHours; 
} 

我固定它通過改變這

public class ProjectView 
{ 
    public int ProjectId { get; set; }  
    public string ProjectName { get; set; } 
    public int AccountId { get; set; } 
    public string AccountName { get; set; } 
    public int AllottedHours{ get; set; } 
    public int InvoicedHours { get; set; } 
    public int UninvoicedHours { get; set; } 
    public int RemainingHours { get; set; } 
} 

Answer 2

1）您只應在LoadGrid方法中設置的DataContext。

this.Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() => 
{ 
    ProjectsSubGrid.DataContext = list; 
})); 

2）將Name屬性設置爲DataGridTextColumn沒有意義。 3）更新您的LINQ查詢作爲

var list = (from p in ProjectManagement.Context.Project 
       join a in ProjectManagement.Context.Account 
       on p.AccountId equals a.AccountId 
       select new ProjectView(){ 
        AccountId = a.AccountId, 
        ProjectId = p.ProjectId, 
        ProjectName = p.ProjectName, 
        InvoicedHours = p.InvoicedHours, 
        AccountName = a.CompanyName, 
        AllottedHours = p.AllottedHours, 
        RemainingHours = p.RemainingHours, 
        UninvoicedHours = p.UninvoicedHours 
       }).ToList(); 

Answer 3

嘗試增加路徑的結合DataGridTextColumn聲明。 這是我以前的一個項目的一個例子。

<DataGrid Grid.Column="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" 
              ItemsSource="{Binding Addresses}" 
              AutoGenerateColumns="False" 
              CanUserAddRows="False" 
              IsReadOnly="True" 
              SelectionMode="Single" 
              IsEnabled="{Binding IsSelectionEnabled}" 
              SelectedItem="{Binding SelectedAddress}" 
              SelectedIndex="{Binding SelectedIndex}" 
              > 
     <DataGrid.Columns> 
      <DataGridTextColumn Binding="{Binding Path=Street}" Header="Street"/> 
      <DataGridTextColumn Binding="{Binding Path=Number}" Header="Number"/> 
      <DataGridTextColumn Binding="{Binding Path=PostalCode}" Header="PostalCode"/> 
      <DataGridTextColumn Binding="{Binding Path=City}" Header="City"/> 
      <DataGridTextColumn Binding="{Binding Path=Provence}" Header="Provence"/> 
      <DataGridTextColumn Binding="{Binding Path=Country}" Header="Country"/> 
     </DataGrid.Columns> 
    </DataGrid>