wpf datagrid行中的小计单元格

问题描述：

如果激发CellEditEnding，我试图动态小计几行。现在，我正在循环整个集合以获得总数并将其放入总单元格中。请参见下面的代码：wpf datagrid行中的小计单元格

private void CalculateTotals() 
    { 
     foreach (var i in reviewItems) // total pay is calculated on data load 
     { 
      if (i.Total_Pay == null || i.IsApproved != true) //total pay is recalculated on save 
      { 
       i.Total_Pay = GetValue(i.Total_Bonus_Items) + GetValue(i.Total_Hourly_Pay) + 
        GetValue(i.Total_Line_Items) + GetValue(i.Total_Sick) + 
        GetValue(i.Total_Adjustments) + GetValue(i.Total_Vacation); 
       SavedSummary = false; 
      } 
     } 
    }

XAML如下

<DataGrid x:Name="SummaryGrid" Margin="10,66,10,0" CellEditEnding="SummaryGrid_CellEditEnding"> 
     <DataGrid.Columns> 
      <DataGridTextColumn Header="Employee" Binding="{Binding Emp_Name}" IsReadOnly="True"/> 
      <DataGridTextColumn Header="Period End" Binding="{Binding Week_End_Date, StringFormat=MM/dd/yyyy}" IsReadOnly="True" /> 
      <DataGridTextColumn Header="Load Pay" Binding="{Binding Total_Line_Items}" Visibility="{Binding Source={x:Reference LoadVisibility}}" IsReadOnly="True"/> 
      <DataGridTextColumn Header="Extra Items" Binding="{Binding Total_Bonus_Items}" Visibility="{Binding Source={x:Reference LoadVisibility}}" IsReadOnly="True"/> 
      <DataGridTextColumn Header="Hours" Binding="{Binding Total_Hourly_Pay}" Visibility="{Binding Source={x:Reference HourlyVisibility}, Path=Visibility}" IsReadOnly="True"/> 
      <DataGridTextColumn Header="Vacation" Binding="{Binding Total_Vacation}" Visibility="{Binding Source={x:Reference HourlyVisibility}, Path=Visibility}"/> 
      <DataGridTextColumn Header="Sick" Binding="{Binding Total_Sick}" Visibility="{Binding Source={x:Reference HourlyVisibility}, Path=Visibility}"/> 
      <DataGridTextColumn Header="Adjustments" Binding="{Binding Total_Adjustments}" Visibility="{Binding Source={x:Reference HourlyVisibility}, Path=Visibility}"/> 
      <DataGridTextColumn Header="Total Pay" Binding="{Binding Total_Pay}"/> 
      <DataGridTemplateColumn> 
       <DataGridTemplateColumn.Header> 
        Approved 
       </DataGridTemplateColumn.Header> 
       <DataGridTemplateColumn.CellTemplate> 
        <DataTemplate> 
         <CheckBox IsChecked="{Binding IsApproved, UpdateSourceTrigger=PropertyChanged}"/> 
        </DataTemplate> 

       </DataGridTemplateColumn.CellTemplate> 
      </DataGridTemplateColumn> 
     </DataGrid.Columns> 
    </DataGrid>

我有在主窗口一个复选框，我附于主键如Tag="{Binding tkey}"我的数据抓取，但我无法弄清楚如何从DataGridCellEditEndingEventArgs或sender中获取该事件。有没有一种方法来捕捉我使用标签来自哪一行？

答

很抱歉，如果我误解了。在任何其他有价值的单元格中编辑值之后，您需要更新Total，对吗？ DataGridCellEditEndingEventArgs存储您编辑的行数。使用这个，你只能计算和更新当前行的Total值。我在下面创建了一个简单的例子。它将属性val1-val3中的值相加并将总和放在名为“total”的属性中。

这是一个简单的类，用于根据数据源结构保留属性。请注意，您必须实施INotifyPropertyChanged界面才能更新UI。

public class DataItem:INotifyPropertyChanged 
{ 
    public DataItem(int v1,int v2,int v3) 
    { 
     val1 = v1; 
     val2 = v2; 
     val3 = v3; 
     total = v1 + v2 + v3; 
    } 

    private int _val1; 
    public int val1 
    { 
     get { return _val1; } 
     set { _val1 = value; InvokePropertyChanged(new PropertyChangedEventArgs("val1"));} 
    } 

    private int _val2; 
    public int val2 
    { 
     get { return _val2; } 
     set { _val2 = value; InvokePropertyChanged(new PropertyChangedEventArgs("val2")); } 
    } 

    private int _val3; 
    public int val3 
    { 
     get { return _val3; } 
     set { _val3 = value; InvokePropertyChanged(new PropertyChangedEventArgs("val3")); } 
    } 

    private int _total; 
    public int total 
    { 
     get { return _total; } 
     set { _total = value; InvokePropertyChanged(new PropertyChangedEventArgs("total")); } 
    } 

    public event PropertyChangedEventHandler PropertyChanged; 

    public void InvokePropertyChanged(PropertyChangedEventArgs e) 
    { 
     PropertyChangedEventHandler handler = PropertyChanged; 
     if (handler != null) handler(this, e); 
    } 
}

这是一个代码隐藏其中数据网格放置，这里的数据填充并加载到电网并且还datagrid_CellEditEnding事件被处理的主窗口。

public MainWindow() 
    { 
     InitializeComponent(); 
     list = new ObservableCollection<DataItem>(); 
     DataItem i1 = new DataItem(3,6,8); 
     DataItem i2 = new DataItem(1, 2, 6); 
     DataItem i3 = new DataItem(9, 7, 22); 
     list.Add(i1); 
     list.Add(i2); 
     list.Add(i3); 
     datagrid.ItemsSource = list; 
    } 

    public ObservableCollection<DataItem> list; 

    private void datagrid_CellEditEnding(object sender, DataGridCellEditEndingEventArgs e) 
    { 
     int index = e.Row.GetIndex(); 
     list[index].total = list[index].val1 + list[index].val2 + list[index].val3; 
    }

最后，XAML为DataGrid：

<DataGrid x:Name="datagrid" AutoGenerateColumns="False" CellEditEnding="datagrid_CellEditEnding"> 
     <DataGrid.Columns> 

      <DataGridTextColumn Header="Val1" Binding="{Binding Path=val1, UpdateSourceTrigger=PropertyChanged}"/> 
      <DataGridTextColumn Header="Val2" Binding="{Binding Path=val2, UpdateSourceTrigger=PropertyChanged}"/> 
      <DataGridTextColumn Header="Val3" Binding="{Binding Path=val3, UpdateSourceTrigger=PropertyChanged}"/> 
      <DataGridTextColumn Header="total" FontWeight="Black" Binding="{Binding Path=total}" /> 
     </DataGrid.Columns> 
    </DataGrid>

wpf datagrid行中的小计单元格

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