WPF-数据网格对话框-从下拉列表中选择项目后更改显示值

本文关键字:项目 选择 显示 下拉列表 数据网 数据 网格 对话框 WPF- | 更新日期: 2023-09-27 18:21:59

我在XAML中指定了一个数据网格作为

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

列数是根据用户的选择动态设置的。

//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");

我以以下方式添加新列

    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,当下拉列表展开时,它包含字典中的值。但在用户选择任何项目后,键都应该显示在一个单元格中。屏幕

你能帮我做这件事吗?

WPF-数据网格对话框-从下拉列表中选择项目后更改显示值

这是一个基于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数组实际上是映射对象的数组时。您可以注意到,该解决方案使用了两种样式;一个用于选择值时的组合编辑状态(EditingElementStyle),另一个用于组合仅显示选定值时的状态(ElementStyle)。因此,当组合失去焦点时,将显示分数"Key",而当您编辑组合选择值(选择值)时,会显示口头分数值。此解决方案要求DataGridComboBoxColumn ItemsSource是键/值对的集合,如以下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>

让我知道你是否需要代码隐藏版本而不是XAML代码。我希望这会有所帮助,亲爱的。

更新:1.列项目源代码(只需在代码后面设置):

 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.评分数据编码:

   public class ScoreData
{
    public string ScoreVerbal { get; set; }
    public int Score { get; set; }
}
  1. 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;
    
  2. 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>
    

    仅此而已,如果代码出现问题,我将很乐意提供帮助。看待