System.OutOfMemoryException 将数据从超过 200 万行的数据表加载到

Question

我正在尝试将 DataTable 分配为 dataGrid1 dataGrid1.ItemsSource = dtselect.DefaultView 的 itemsource 但它给出 System.OutOfMemoryException我有一个包含多个 DataTable 的数据集。我在该按钮上随机创建一个按钮单击我想显示从 DataTable 到 dataGrid1 的数据，但这里的问题是 DataTable 有超过 200 万行，当我单击一个按钮时，它需要超过 2gb 的内存并给我系统。内存不足异常。Button = sender as Button;                    string content = button.Content.ToString();                    foreach (DataTable table in dsr.Tables)                    {                        if (table.TableName == content)                        {                            dataGrid1.ItemsSource = table.DefaultView;                            dtselect = table;                        }                    }我希望输出更少的内存使用和显示结果而不是 System.OutOfMemoryException

Answer 1

<Viewbox Grid.Row="3" Stretch="Fill">
                <DataGrid x:Name="dataGrid1" Grid.Row="3" VirtualizingPanel.VirtualizationMode="Recycling" BorderThickness="0" VirtualizingPanel.IsVirtualizing="True" CanUserSortColumns="True" EnableRowVirtualization="True" IsReadOnly="True" CanUserResizeColumns="True" CanUserAddRows="False"  VerticalAlignment="Bottom"  HorizontalAlignment="Stretch" VerticalScrollBarVisibility="Auto" 
                HorizontalScrollBarVisibility="Auto" ScrollViewer.CanContentScroll="True" Height="600" Width="auto" ItemsSource="{Binding}" AutoGenerateColumns="False" ScrollViewer.VerticalScrollBarVisibility="Auto"   Background="#b5d2fc"  ClipboardCopyMode="IncludeHeader" SelectionMode="Extended" CanUserDeleteRows="False">
                    <DataGrid.Columns>
                        <DataGridTextColumn Width="200" Header="Day"  Binding="{Binding Day}"/>
                        <DataGridTextColumn Width="200" Header="Date" Binding="{Binding Date}"/>
                        <DataGridTextColumn Width="200" Header="Time" Binding="{Binding Time}"/>
                        <DataGridTextColumn Width="200" Header="Lat" Binding="{Binding Lat}"/>
                        <DataGridTextColumn Width="200" Header="Long" Binding="{Binding Long}"/>
                        <DataGridTextColumn Width="400" Header="Address" Binding="{Binding Address}"/>
                        <DataGridTextColumn Width="200" Header="Accuracy" Binding="{Binding Accuracy}"/>
                        <DataGridTextColumn Width="200" Header="Type" Binding="{Binding Type}"/>
                    </DataGrid.Columns>
                </DataGrid>
                </Viewbox>

我只需添加 Viewbox，如果我加载两个以上具有大量数据的文件，我的代码就可以正常工作，那么它消耗的内存也更少