WPF GridView控件与多个复选框列和选择全部列标题 [英] WPF GridView with Multiple Checkbox Columns and Select All Column Header

问题描述

我有包含几个GridViewColumns一个ListView。一些列的两个复选框。每个列标题包含一个复选框，以及与检查/该列中取消选中所有复选框的意图。每一行的复选框被绑定到我的视图模型属性。我见过几个帖子所在的场景是复选框中的一列，但没有这些解决方案会为我工作，因为我有复选框的4列。我还需要从一个访问持久化选择的状态下（全部，没有复选框一列的部分或可能被选中）。

I have a ListView containing several GridViewColumns. Several of the columns are checkboxes. Each column header consists of a checkbox as well, with the intention of checking/unchecking all the checkboxes in that column. Each row's checkboxes are bound to properties in my view model. I've seen several postings where the scenario is a single column of checkboxes, but none of those solutions will work for me, as I have 4 columns of checkboxes. I also need to persist the state of the selections from one visit to the next (all, some or none of the checkboxes in a column could be checked).

下面是XAML为我的ListView的缩写版本：

Here's an abbreviated version of the XAML for my ListView:

<ListView ItemsSource="{Binding AveragingParameters}">
  <ListView.View>
    <GridView AllowsColumnReorder="False">

      <GridViewColumn Header="Parameter">
        <GridViewColumn.CellTemplate>
          <DataTemplate>
            <DockPanel>
              <TextBlock Text="{Binding Name}" />
            </DockPanel>
          </DataTemplate>
        </GridViewColumn.CellTemplate>
      </GridViewColumn>

      <GridViewColumn>
        <GridViewColumn.CellTemplate>
          <DataTemplate>
            <Grid HorizontalAlignment="Stretch">
              <CheckBox  x:Name="chkAvg" IsChecked="{Binding CalcAverage}" />
            </Grid>
          </DataTemplate>
        </GridViewColumn.CellTemplate>
        <Grid>
          <CheckBox x:Name="chkAvgSelectAll" Content="Avg" ToolTip="Select All" />
        </Grid>
      </GridViewColumn>

      <GridViewColumn>
        <GridViewColumn.CellTemplate>
          <DataTemplate>
            <Grid HorizontalAlignment="Stretch">
              <CheckBox  x:Name="chkMin" IsChecked="{Binding CalMin}" />
            </Grid>
          </DataTemplate>
        </GridViewColumn.CellTemplate>
        <Grid>
          <CheckBox x:Name="chkMinSelectAll" Content="Min" ToolTip="Select All" />
        </Grid>
      </GridViewColumn>

    </GridView>
  </ListView.View>
</ListView>

我一直使用命令和命令参数试，对的PropertyChanged Checked属性的事件，在我的code办理托运事件背后，但没有给我足够的信息来知道如何收集我在改变必然。

I've tried using Commands and Command Parameters, PropertyChanged events on the Checked property, and handling the Checked event in my code behind, but nothing gives me enough information to know what to change in the collection I'm bound to.

我想我可以为每个单独的事件处理程序，但我希望能在一个单一的事件处理程序，如果可能的话来处理这个问题，因为最终我将创建一个自定义的控制是更malluable位列的条款显示

I suppose I could create a separate event handler for each, but I'd like to be able to handle this in a single event handler if possible, because eventually I will be creating a custom control that is a bit more malluable in terms of the columns displayed.

在此先感谢

推荐答案

我已经解决使用命令我的问题包含我想设置模型属性的名称并设置为多绑定一个CommandParameter一个标签沿绑定到标签和复选框的IsSelected属性。在code如下：

I've solved my issue using a Command along with a Tag containing the name of the model property I want set and a CommandParameter set to a multi-binding that is bound to the Tag and the Checkbox's IsSelected property. The code follows:

我的视图的XAML中的资源：

My View's Xaml Resources:

<UserControl.Resources>
   <converters:NameValueMultiBindingConverter x:Key="SelectAllConverter" />
</UserControl.Resources>

我的视图的XAML中：

My View's Xaml:

<ListView ItemsSource="{Binding AveragingParameters}">
  <ListView.View>
    <GridView AllowsColumnReorder="False">

      <GridViewColumn Header="Parameter">
        <GridViewColumn.CellTemplate>
          <DataTemplate>
            <DockPanel>
              <TextBlock Text="{Binding Name}" />
            </DockPanel>
          </DataTemplate>
        </GridViewColumn.CellTemplate>
      </GridViewColumn>

      <GridViewColumn>
        <GridViewColumn.CellTemplate>
          <DataTemplate>
            <Grid HorizontalAlignment="Stretch">
              <CheckBox  x:Name="chkAvg" IsChecked="{Binding CalcAverage}" />
            </Grid>
          </DataTemplate>
        </GridViewColumn.CellTemplate>

        <CheckBox x:Name="chkAvgSelectAll" Content="Avg" 
                  Tag="CalcAvg" Command="SelectAllCheckedCommand" 
                  ToolTip="Select All">
            <MultiBinding Converter="{StaticResource SelectAllConverter}">
              <Binding Path="Tag" RelativeSource="{RelativeSource self}" />
              <Binding Path="IsChecked" RelativeSource="{RelativeSource self}" />
            </MultiBinding>
        </CheckBox>
      </GridViewColumn>

      <GridViewColumn>
        <GridViewColumn.CellTemplate>
          <DataTemplate>
            <Grid HorizontalAlignment="Stretch">
              <CheckBox  x:Name="chkMin" IsChecked="{Binding CalMin}" />
            </Grid>
          </DataTemplate>
        </GridViewColumn.CellTemplate>

        <CheckBox x:Name="chkMinSelectAll" Content="Avg" 
                  Tag="CalcMin" Command="SelectAllCheckedCommand" 
                  ToolTip="Select All">
            <MultiBinding Converter="{StaticResource SelectAllConverter}">
              <Binding Path="Tag" RelativeSource="{RelativeSource self}" />
              <Binding Path="IsChecked" RelativeSource="{RelativeSource self}" />
            </MultiBinding>
        </CheckBox>
      </GridViewColumn>

    </GridView>
  </ListView.View>
</ListView>

我MultiValueConverter：

My MultiValueConverter:

public class NameValueMultiBindingConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter,
                          System.Globalization.CultureInfo culture)
    {

        var parameters = (object[])values;
        return new NameValueConverterResult 
                        { 
                           Name = (string)parameters[0], 
                           Value = parameters[1] 
                        };
    }

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, 
                                System.Globalization.CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

我使用转换器中的结果对象：

The result object I'm using in the converter:

public class NameValueConverterResult
{
    //The name of the model property to set
    public string Name { get; set; }

    //The value we're setting it to
    public object Value { get; set; }
}

该DelegateCommand（我使用PRISM）和处理器在我的视图模型

The DelegateCommand (I'm using PRISM) and handler in my View Model

public ICommand SelectAllCheckedCommand { get; private set; }
private void OnSelectAllCheckedCommand(object arg )
{
   if (arg == null || !(arg is NameValueConverterResult)) return;

   NameValueConverterResult prop = arg as NameValueConverterResult;

   //Reflect on the model to find the property we want to update.
   PropertyInfo propInfo = Averagers.FirstOrDefault().GetType().GetProperty(prop.Name);
   if (propInfo == null) return;

   //Set the property on the Model
   foreach (var item in Averagers)
      propInfo.SetValue(item, prop.Value, null);
} 

我希望我没有滥用计算器提供我想出了解决方案。我不知道这里的​​礼仪。

I hope I'm not abusing StackOverflow providing the solution I came up with. I wasn't sure of the etiquette here.

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