当更改ItemsSource时GridView列的宽度不会更新

我有一个GridView，我在代码隐藏中设置ItemsSource。网格中的所有列都在XAML中定义，并且所有列宽均为“自动”。当我最初设置网格的ItemsSource时，列的宽度设置正确。当更改ItemsSource时GridView列的宽度不会更新

现在，根据用户的操作，网格的ItemsSource可能被设置为一个新的EntityCollection。我注意到的是，列宽保持与之前的ItemsSource一样。也就是说，当为网格设置新的ItemsSource时，列宽似乎不会自动调整。在设置列宽时，代码隐藏或XAML中有没有办法强制Grid使用新的ItemsSource？我认为这将是GridView在ItemsSource重置时自动执行的操作。

<ScrollViewer VerticalScrollBarVisibility="Auto"> 
    <ListView> 
     <ListView.View> 
      <GridView> 
       <GridView.Columns> 
        <GridViewColumn Width="Auto" Header="Status"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <Image Width="16" Height="16" Source="{Binding Path=Blocking}" /> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
        <GridViewColumn Width="Auto" Header="Title"> 
         <GridViewColumn.CellTemplate> 
          <DataTemplate> 
           <TextBlock TextTrimming="CharacterEllipsis" Text="{Binding}" /> 
          </DataTemplate> 
         </GridViewColumn.CellTemplate> 
        </GridViewColumn> 
       </GridView.Columns> 
      </GridView> 
     </ListView.View> 
    </ListView> 
</ScrollViewer>

来源

2012-01-31 Igal

你试图迫使' 'GridView'上的UpdateLayout（）'？它可能是它本身，但以防万一， – 2012-01-31 12:22:38

我已经尝试过，但它并没有帮助 – Igal 2012-01-31 12:36:33

使用此代码更新后的ItemsSource：

public void AutoSizeGridViewColumns(ListView listView) 
{ 
    GridView gridView = listView.View as GridView; 
    if (gridView != null) 
    { 
     foreach (var column in gridView.Columns) 
     { 
      if (double.IsNaN(column.Width)) 
       column.Width = column.ActualWidth; 
      column.Width = double.NaN; 
     } 
    } 
}

来源

2012-02-01 07:26:14 Igal

我已经创建了下面的类，并在应用程序中使用等。无论需要到位的GridView的

/// <summary> 
/// Represents a view mode that displays data items in columns for a System.Windows.Controls.ListView control with auto sized columns based on the column content  
/// </summary> 
public class AutoSizedGridView : GridView 
{   
    protected override void PrepareItem(ListViewItem item) 
    { 
     foreach (GridViewColumn column in Columns) 
     { 
      //setting NaN for the column width automatically determines the required width enough to hold the content completely. 
      //if column width was set to NaN already, set it ActualWidth temporarily and set to NaN. This raises the property change event and re computes the width. 
      if (double.IsNaN(column.Width)) column.Width = column.ActualWidth; 
      column.Width = double.NaN;    
     }    
     base.PrepareItem(item); 
    } 
}

来源

2013-04-01 14:05:45 user1333423

当更改ItemsSource时GridView列的宽度不会更新

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