将具有 KeyValuePair 的实体绑定到 WPF 中的 Datagrid答案

【问题标题】：Bind Entity with KeyValuePair to Datagrid in WPF将具有 KeyValuePair 的实体绑定到 WPF 中的 Datagrid
【发布时间】：2019-01-02 13:33:43
【问题描述】：

下面是我的键值对类

public class GridExpression
{
    public int Count { get; set; }
    public string Title { get; set; }
    public KeyValuePair<string, double> T1 { get; set; }
    public KeyValuePair<string, double> T2 { get; set; }
    public KeyValuePair<string, double> T3 { get; set; }


}
ObservableCollection<GridExpression> grid = new 
ObservableCollection<GridExpression>();

我想将上面的 ObservableCollection 绑定到一个 Datagrid

如果我们使用 List 而不是 Keypairvalue

就像在 XAML 代码下面一样，我添加了 2 个 T1，一个带有 Grid，另一个带有 Wrappanel 网格至少显示文本块背景的浅绿色

<DataGrid x:Name="_timeframe_Copy" Margin="0,408.152,10,10" AlternatingRowBackground="#FFFFF5D4" AutoGenerateColumns="False"
    HorizontalAlignment="Right" Width="766.167">
    <DataGrid.Columns>
        <DataGridTextColumn Header="Count" Binding="{Binding Count}" />
        <DataGridTextColumn Header="Title" Binding="{Binding Title}" />
        <DataGridTemplateColumn Header="T1">
            <DataGridTemplateColumn.CellTemplate>
                <DataGridTemplateColumn Header="T1" MinWidth="10">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Grid x:Name="brdBroder" VerticalAlignment="Stretch" Margin="1" DataContext="{Binding T1, RelativeSource={RelativeSource AncestorType=Window}}">
                                <TextBlock Text="{Binding Key}" Margin="3,1" Background="Aqua" Foreground="White" />
                                <TextBlock Text="{Binding Value}" Margin="3,1" />
                            </Grid>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

                <DataGridTemplateColumn Header="T1" MinWidth="10">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <WrapPanel x:Name="brdBroder" VerticalAlignment="Stretch" Margin="1" DataContext="{Binding T1, RelativeSource={RelativeSource AncestorType=Window}}">
                                <TextBlock Text="{Binding Key}" Margin="3,1" Background="Aqua" Foreground="White" />
                                <TextBlock Text="{Binding Value}" Margin="3,1" />
                            </WrapPanel>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

                <DataGridTemplateColumn Header="T2" MinWidth="10">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <WrapPanel x:Name="brdBroder" VerticalAlignment="Stretch" Margin="1" DataContext="{Binding T2, RelativeSource={RelativeSource AncestorType=Window}}">
                                <TextBlock Text="{Binding Key}" Margin="3,1" Background="Aqua" Foreground="White" />
                                <TextBlock Text="{Binding Value}" Margin="3,1" />
                            </WrapPanel>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

                <DataGridTemplateColumn Header="T3" MinWidth="10">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <WrapPanel x:Name="brdBroder" VerticalAlignment="Stretch" Margin="1" DataContext="{Binding T2, RelativeSource={RelativeSource AncestorType=Window}}">
                                <TextBlock Text="{Binding Key}" Margin="3,1" Background="Aqua" Foreground="White" />
                                <TextBlock Text="{Binding Value}" Margin="3,1" />
                            </WrapPanel>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>
            </DataGridTemplateColumn.CellTemplate>
        </DataGridTemplateColumn>
    </DataGrid.Columns>
</DataGrid>

我不知道如何绑定键值对和绑定到Datagridtemplate

【问题讨论】：

标签： c# wpf

【解决方案1】：

问题在于您的DataContext 绑定。

DataGridTemplateColumn.CellTemplate 中的DataContext 是GridExpression。

这就是为什么你只需要改变这一行：

<WrapPanel x:Name="brdBroder" VerticalAlignment="Stretch" Margin="1" DataContext="{Binding T1, RelativeSource={RelativeSource AncestorType=Window}}">

到：

<WrapPanel x:Name="brdBroder" VerticalAlignment="Stretch" Margin="1" DataContext="{Binding T1}">

【讨论】：