无法转换对象

为什么这个代码不工作无法转换对象

private void dataGrid_LoadingRow(object sender, Microsoft.Windows.Controls.DataGridRowEventArgs e) 
    { 
     //Highlighting rows 

     Product product = (Product)e.Row.DataContext; 

     if (product.Price > 100) 
     { 
      e.Row.Background = highlightBrush; 
     } 
     else 
     { 
      e.Row.Background = normalBrush; 
     } 
    } 

} 
class Product 
{ 
    public int IdBook ; 
    public string NameBook; 
    public string Author; 
    public string Description; 
    public string DateRegister; 
    public Int32 Price; 
}

XAML：

  <dg:DataGrid Name="dataGrid" AutoGenerateColumns="False" CanUserAddRows="False" CanUserDeleteRows="False" IsReadOnly="True"       


        HeadersVisibility="Column" SelectedIndex="-1" Margin="0,315,0,25" Background="#FF484040" BorderBrush="#FF484040" 

SelectionChanged="dataGrid_SelectionChanged" LoadingRow="dataGrid_LoadingRow"> 
      <dg:DataGrid.Columns> 
       <dg:DataGridTextColumn Binding="{Binding IdBook}" Header="IdBook" ></dg:DataGridTextColumn> 
       <dg:DataGridTextColumn Binding="{Binding NameBook}" Header="NameBook"></dg:DataGridTextColumn> 
       <dg:DataGridTextColumn Binding="{Binding Author}" Header="Author"></dg:DataGridTextColumn> 
       <dg:DataGridTextColumn Binding="{Binding Price}" Header="Price"></dg:DataGridTextColumn> 
       <dg:DataGridTextColumn Binding="{Binding DateRegister}" Header="DateRegister"></dg:DataGridTextColumn> 
       <dg:DataGridTextColumn Binding="{Binding Description}" Header=Description" Width="*"></dg:DataGridTextColumn> 
       <dg:DataGridTemplateColumn> 

        <dg:DataGridTemplateColumn.CellTemplate> 
         <DataTemplate> 
          <Button Click="Delete_Click" ToolTip="Delete" Height="30" Width="30" FlowDirection="RightToLeft" Style="{DynamicResource GlassButton}" 

Background="{DynamicResource TileBrush}"> 

          </Button> 
         </DataTemplate> 
        </dg:DataGridTemplateColumn.CellTemplate> 

       </dg:DataGridTemplateColumn> 
       <dg:DataGridTemplateColumn Width="15" > 
        <dg:DataGridTemplateColumn.CellTemplate> 
         <DataTemplate> 
          <CheckBox ToolTip="Select" Name="Checkbox" Height="15" Width="15" HorizontalContentAlignment="Center" HorizontalAlignment="Center" 

VerticalAlignment="Center" VerticalContentAlignment="Center"> 

          </CheckBox> 
         </DataTemplate> 
        </dg:DataGridTemplateColumn.CellTemplate> 
       </dg:DataGridTemplateColumn> 
      </dg:DataGrid.Columns> 


     </dg:DataGrid>

错误：

无法投类型的对象System.Data.DataRowView“键入 'BooksManagement_Version1.Product'。

来源

2011-07-31 mrJack

看来行的DataContext不是你所期望的。检查您是否绑定到Product的集合。此外，如果您可以发布DataGrid的xaml，这将是有益的。

来源

2011-07-31 06:46:24 Purvi

我没有抓到... – mrJack

我同意。看起来像您设置的wpf数据网格的ItemsSource不是Product类的集合。它实际上是一个DataTable（因为我们可以从错误中看出数据网格行的数据上下文是DataRowView而不是Product类）。 –

无法转换对象

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