WPF

Question

我在 XAML 中指定了一个数据网格作为

    <DataGrid Name="grAssessment">
    </DataGrid>

列数根据用户的选择动态设置。

//define number of alternatives
int num = Alternatives.Children.Count - 1;

列是带有字典选项的组合框

Dictionary<int, string> scores = new Dictionary<int, string>();
scores.Add(1, "the same");
scores.Add(3, "moderate superiority");
scores.Add(5, "strong superiority");
scores.Add(7, "very strong superiority");
scores.Add(9, "extremely superiority");

我按以下方式添加新列

    for (int i = 0; i < num; i++)
    {
        DataGridComboBoxColumn col = new DataGridComboBoxColumn();
        grAssessment.Columns.Add(col);
        col.Width = new DataGridLength(1, DataGridLengthUnitType.Star);
        col.ItemsSource = scores;
        col.DisplayMemberPath = "Value";
        col.SelectedValuePath = "Key";                 
    }

我真正想要的是，当下拉菜单展开时，它包含字典中的值。但是在用户选择任何项目后，Key 应该显示在一个单元格中。 screen

你能帮我解决这个问题吗？

Answer 1

这是基于 xaml 的问题解决方案； 1. XAML代码：

                <DataGridComboBoxColumn Header="Scores" 
                                    SelectedValueBinding="{Binding ScoreData, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}">
                <DataGridComboBoxColumn.ElementStyle>
                    <Style TargetType="ComboBox">
                        <Setter Property="ItemsSource" Value="{StaticResource ScoresAndDescription}"/>
                        <Setter Property="DisplayMemberPath" Value="Score"></Setter>
                        <Setter Property="IsReadOnly" Value="True"/>
                    </Style>
                </DataGridComboBoxColumn.ElementStyle>
                <DataGridComboBoxColumn.EditingElementStyle>
                    <Style TargetType="ComboBox">
                        <Setter Property="ItemsSource" Value="{StaticResource ScoresAndDescription}"/>
                        <Setter Property="DisplayMemberPath" Value="ScoreVerbal"></Setter>
                        <Setter Property="IsReadOnly" Value="True"/>
                    </Style>
                </DataGridComboBoxColumn.EditingElementStyle></DataGridComboBoxColumn>

当simpleDataGrid:ScoreData数组实际上是你映射对象的数组。您会注意到该解决方案使用了两种样式；当您 select 一个值时，一个用于组合编辑状态 (EditingElementStyle)，当组合仅显示 selected 值时，第二个 (ElementStyle) 用于状态。因此，当组合失去对它的关注时，将显示得分 "Key"，而当您编辑组合 selected 值（select 值）时，将显示口头得分值。此解决方案要求 DataGridComboBoxColumn ItemsSource 是 key/value 对的集合，如下所示 xaml 代码：

       <x:Array Type="simpleDataGrid:ScoreData" x:key>
        <simpleDataGrid:ScoreData Score="1" ScoreVerbal="the same"/>
        <simpleDataGrid:ScoreData Score="3" ScoreVerbal="moderate superiority"/>
        <simpleDataGrid:ScoreData Score="5" ScoreVerbal="strong superiority"/>
        <simpleDataGrid:ScoreData Score="7" ScoreVerbal="the samvery strong superioritye"/>
        <simpleDataGrid:ScoreData Score="9" ScoreVerbal="extremely superiority"/>
    </x:Array>

告诉我您是否需要版本背后的代码而不是 XAML 代码。希望对您有所帮助，问候。

更新： 1. Column items源码（在后面的代码中设置即可）：

 private ObservableCollection<ScoreData> _scores = new ObservableCollection<ScoreData>(

    new List<ScoreData> 
    {
        new ScoreData{Score = 1, ScoreVerbal = "the same"},
        new ScoreData{Score = 3, ScoreVerbal = "moderate superiority"},
        new ScoreData{Score = 5, ScoreVerbal = "strong superiority"},
        new ScoreData{Score = 7, ScoreVerbal = "the samvery strong superioritye"},
        new ScoreData{Score = 9, ScoreVerbal = "extremely superiority"},
    } );

2。分数数据代码：

   public class ScoreData
{
    public string ScoreVerbal { get; set; }
    public int Score { get; set; }
}

列创建代码（将其设置为列创建方法的一部分）：

    var col = new DataGridComboBoxColumn();
    dataGrid.Columns.Add(col);
    col.Width = new DataGridLength(1, DataGridLengthUnitType.Star);
    col.ItemsSource = _scores;
    col.Header = "Added In Code";
    col.SelectedValueBinding = new Binding("ScoreData");
    //bring the ElementStyle from the xaml code by its key
    var elementStyle = this.FindResource("ElementStyle") as Style;
    col.ElementStyle = elementStyle;
    //bring the EditingElementStyle from the xaml code by its key
    var editingElementStyle = this.FindResource("EditingElementStyle") as Style;
    col.EditingElementStyle = editingElementStyle;

Xaml 代码（将其设置为 window.xaml 或 app.xaml 资源的一部分）：

<Style x:Key="ElementStyle" TargetType="ComboBox">
    <Setter Property="DisplayMemberPath" Value="Score"></Setter>
    <Setter Property="IsReadOnly" Value="True"/>
</Style>
<Style x:Key="EditingElementStyle" TargetType="ComboBox">
    <Setter Property="DisplayMemberPath" Value="ScoreVerbal"></Setter>
    <Setter Property="IsReadOnly" Value="True"/>
</Style>

就是这样，如果代码有问题，我很乐意提供帮助。关注

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c#

datagridcomboboxcolumn