正在发送DataGrid(DataGridRowDetailsEventArgs e)AsyncResult

本文关键字：DataGridRowDetailsEventArgs AsyncResult DataGrid | 更新日期: 2023-09-27 18:28:13

您好。有一个DataGrid（operationGrid）RowDetailsTemplate，其中包含DataGrid（sumOperationGrid）

            <DataGrid AutoGenerateColumns="False" CanUserReorderColumns="False" CanUserResizeColumns="False" CanUserSortColumns="False" IsReadOnly="True" ItemsSource="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType=UserControl}, Path=OperCountUnits}" Name="operationGrid" RowDetailsVisibilityMode="VisibleWhenSelected" SelectionMode="Single" VerticalContentAlignment="Bottom" Grid.ColumnSpan="2" Margin="6,60,7,6" LoadingRowDetails="operationGrid_LoadingRowDetails" SelectionChanged="operationGrid_SelectionChanged">
                <DataGrid.Columns>
                    <DataGridTextColumn x:Name="Id" Binding="{Binding Path=Id}" Header="{Binding NumberOfOperation, Source={StaticResource resources}}" IsReadOnly="True" />
                    <DataGridTextColumn x:Name="StartedAt" Binding="{Binding Path=StartedAt, Converter={StaticResource ConvertCultureDate}}" Header="{Binding StartedAt, Source={StaticResource resources}}" IsReadOnly="True" />
                    <DataGridTextColumn x:Name="FinisedAt" Binding="{Binding Path=FinishedAt, Converter={StaticResource ConvertCultureDate}}" Header="{Binding FinishedAt, Source={StaticResource resources}}" IsReadOnly="True" />
                    <DataGridTextColumn x:Name="CountMode" Binding="{Binding Path=Description}" Header="{Binding CountMode, Source={StaticResource resources}}" IsReadOnly="True" />
                    <DataGridTextColumn x:Name="CurrencyCode" Header="{Binding CurrcencyCode, Source={StaticResource resources}}" IsReadOnly="True" />
                    <DataGridTextColumn x:Name="UnitId" Binding="{Binding Path=UnitId}" Header="UnitId" IsReadOnly="True" Visibility="Collapsed" />
                    <DataGridTextColumn x:Name="CountModeId" Binding="{Binding Path=CountModeId}" Header="CountModeId" IsReadOnly="True" Visibility="Collapsed" />
                    <DataGridTextColumn x:Name="HotListCount" Binding="{Binding Path=HotListCount}" Header="Фальш" IsReadOnly="True" Visibility="Collapsed" />
             </DataGrid.Columns>
                <DataGrid.RowDetailsTemplate>
                    <DataTemplate>
                        <DataGrid AutoGenerateColumns="False" IsReadOnly="True" ItemsSource="{Binding CurrencySum}" Name="sumOperationGrid" SelectionChanged="sumOperationGrid_SelectionChanged" SelectionMode="Single">
                            <DataGrid.Columns>
                                <DataGridTextColumn Binding="{Binding csId}" Visibility="Collapsed" />
                                <DataGridTextColumn Binding="{Binding CurrId}" Visibility="Collapsed" />
                                <DataGridTextColumn Binding="{Binding Curr}" Header="{Binding Currency, Source={StaticResource resources}}" />
                                <DataGridTextColumn Binding="{Binding TotalSum, Converter={StaticResource replaceNull}}" Header="{Binding Sum, Source={StaticResource resources}}" />
                          </DataGrid.Columns>
                        </DataGrid>
                    </DataTemplate>
                </DataGrid.RowDetailsTemplate>
            </DataGrid>

请求是针对WCF服务的，结果是一切都很好如果您通过委托提交数据，那么答案在数据网格（sumOperationGrid）中并显示。

  private delegate void CurrencySumByCurrentItemInvoke(DataGrid sumGrid,List<CurrencySum> sum );
   private void operationGrid_LoadingRowDetails(object sender, DataGridRowDetailsEventArgs e)
    {
        OperCountUnit _con = (OperCountUnit)e.Row.DataContext;
        DataGrid s2 = e.DetailsElement.FindName("sumOperationGrid") as DataGrid;
        client.BeginGetCurrencySumByCurrentItem((int)_con.Id,
            new AsyncCallback(
            delegate(IAsyncResult result)
            {
                List<CurrencySum> sum = client.EndGetCurrencySumByCurrentItem(result).ToList<CurrencySum>();
                if (sum != null)
                {
                    s2.Dispatcher.BeginInvoke(new CurrencySumByCurrentItemInvoke(GetCurrencySumByCurrentItemInvoke), new object[2] {s2, sum});
                }
            }
           ), null);
      }
    void GetCurrencySumByCurrentItemInvoke(DataGrid sumGrid, List<CurrencySum> sum)
    {
        sumGrid.ItemsSource = sum;
    }

尝试过了。

private void operationGrid_LoadingRowDetails(object sender, DataGridRowDetailsEventArgs e)
{
OperCountUnit _con = (OperCountUnit)e.Row.DataContext;
 DataGrid s2 = e.DetailsElement.FindName("sumOperationGrid") as DataGrid;
client.BeginGetCurrencySumByCurrentitem((int)_con.Id, new AsyncCallback        (GetCurrencySumByCurrentItemCallBack), null);
}
private delegate void CurrencySumByCurrentItemInvoke(DataGrid sumGrid,List<CurrencySum> sum );
private void GetCurrencySumByCurrentItemCallBack(IAsyncResult result)
{
DataGridRow opGrRow = (DataGridRow)(this.operationGrid.ItemContainergenerator.containerfromitem        (this.operationGrid.Items.Currentitem));
 ContentPresenter cpOpGrRow = FindVisualChild<ContentPresenter>(opGrRow);
DataTemplate dtOpGrRow = cpOpGrRow.ContentTemplate;
DataGrid s2 = (DataGrid)dtOpGrRow.FindName("sumOperationGrid", cpOpGrRow);
}
void GetCurrencySumByCurrentItemInvoke(DataGrid sumGrid, List<CurrencySum> sum)
{
sumGrid.ItemsSource = sum;
}
private childItem FindVisualChild<childItem>(DependencyObject obj)
where childItem : DependencyObject
{
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(obj); i++)
{
DependencyObject child = VisualTreeHelper.GetChild(obj, i);
if (child != null && child is childItem)
return (childItem)child;
else
{
childItem childOfChild = FindVisualChild<childItem>(child);
if (childOfChild != null)
return childOfChild;
}
}
return null;
}

因此

private void operationGrid_LoadingRowDetails(object sender, DataGridRowDetailsEventArgs e)
{
OperCountUnit _con = (OperCountUnit)e.Row.DataContext;
DataGrid s2 = e.DetailsElement.FindName("sumOperationGrid") as DataGrid;
client.BeginGetCurrencySumByCurrentitem((int)_con.Id, new AsyncCallback    (GetCurrencySumByCurrentItemCallBack), s2);
}
private delegate void CurrencySumByCurrentItemInvoke(DataGrid sumGrid,List<CurrencySum> sum );
private void GetCurrencySumByCurrentItemCallBack(IAsyncResult result)
{
DataGrid s2 = result.AsyncState as DataGrid
List<CurrencySum> sum = client.EndGetCurrencySumByCurrentitem(result).ToList<CurrencySum>();
if (sum != null)
{
s2.Dispatcher.BeginInvoke(new CurrencySumByCurrentItemInvoke(GetCurrencySumByCurrentItemInvoke),     new object[2] {s2, sum});
}

}
void GetCurrencySumByCurrentItemInvoke(DataGrid sumGrid, List<CurrencySum> sum)
{
sumGrid.ItemsSource = sum;
}

在这两种情况下，都归结为错误"调用线程无法访问此对象，因为此对象的所有者是另一个线程。"

如何从客户端删除委托的问题。是否在单独的函数中开始GetCurrencySumByCurrentItem并转发数据表s2？如何回到您的流中并将数据加载到表sumOperationGrid中？

正在发送DataGrid(DataGridRowDetailsEventArgs e)AsyncResult

如果我理解混乱的代码，我就不明白你为什么要到处通过数据网格。仅尝试在操作结束时通过传递sum来访问网格并设置ItemsSource。以下是回调函数的伪代码：

private void GetCurrencySumByCurrentItemCallBack(IAsyncResult result)
{
   if(sum != null)
   {
      this.Invoke(new Action(()=>
       {
          //get data grid 
          //set ItemSource
       })
   }
}

或者，如果您确实需要调用数据网格，请尝试这样做：

DataGrid myDataGrid;
private void operationGrid_LoadingRowDetails(object sender, DataGridRowDetailsEventArgs e)
{
    OperCountUnit _con = (OperCountUnit)e.Row.DataContext;
    myDataGrid = e.DetailsElement.FindName("sumOperationGrid") as DataGrid;
    //do stuff without passing grid
}
private void GetCurrencySumByCurrentItemCallBack(IAsyncResult result)
{
    List<CurrencySum> sum = client.EndGetCurrencySumByCurrentitem(result).ToList<CurrencySum>();
    if (sum != null)
    {
        myDataGrid.Dispatcher.BeginInvoke(new Action(()=>
         {
             myDataGrid.ItemSource = sum;
         });
}
是的。这是个好主意。非常感谢！ 
private void GetCurrencySumByCurrentItemCallBack(IAsyncResult result)
{
   if(sum != null)
   {
      this.Invoke(new Action(()=>
       {
          //get data grid 
          //set ItemSource
       })
   }
}

我更改了我的代码

    private void operationGrid_LoadingRowDetails(object sender, DataGridRowDetailsEventArgs e)
    {
        OperCountUnit _con = (OperCountUnit)e.Row.DataContext;
        client.BeginGetCurrencySumByCurrentItem((int)_con.Id, new AsyncCallback(GetCurrencySumByCurrentItemCallBack), null);
    }        
    private delegate void CurrencySumByCurrentItemInvoke(List<CurrencySum> sum);
    private void GetCurrencySumByCurrentItemCallBack(IAsyncResult result)
    {
        List<CurrencySum> sum = client.EndGetCurrencySumByCurrentItem(result).ToList<CurrencySum>();
        if (sum != null)
        {
            Dispatcher.Invoke(new CurrencySumByCurrentItemInvoke(GetCurrencySumByCurrentItemInvoke), new object[1] { sum });
        }        
    }
    void GetCurrencySumByCurrentItemInvoke(List<CurrencySum> sum)
    {
        DataGridRow opGrRow = (DataGridRow)(this.operationGrid.ItemContainerGenerator.ContainerFromItem(this.operationGrid.SelectedItem));
        DataGridDetailsPresenter cpOpGrRow = FindVisualChild<DataGridDetailsPresenter>(opGrRow);
        DataTemplate dtOpGrRow = cpOpGrRow.ContentTemplate;
        DataGrid s2 = (DataGrid)dtOpGrRow.FindName("sumOperationGrid", cpOpGrRow);
        s2.ItemsSource = sum;
    }
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