我在 XAML 中设置DataGrid
了两个s(从此处DataGridComboBoxColumn
复制):
<DataGrid x:Name="joinGrid" AutoGenerateColumns="False" CanUserAddRows="True">
<DataGrid.Columns>
<DataGridComboBoxColumn>
<DataGridComboBoxColumn.ElementStyle>
<Style TargetType="ComboBox">
<Setter Property="IsDropDownOpen" Value="True" />
<Setter Property="ItemsSource" Value="{Binding Path=TableAColumns}" />
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<TextBlock Text="{Binding}"></TextBlock>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</DataGridComboBoxColumn.ElementStyle>
<DataGridComboBoxColumn.EditingElementStyle >
<Style TargetType="ComboBox">
<Setter Property="ItemsSource" Value="{Binding Path=TableAColumns}" />
<Setter Property="IsDropDownOpen" Value="True" />
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<TextBlock Text="{Binding}"></TextBlock>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</DataGridComboBoxColumn.EditingElementStyle>
</DataGridComboBoxColumn>
<DataGridComboBoxColumn>
<DataGridComboBoxColumn.ElementStyle>
<Style TargetType="ComboBox">
<Setter Property="IsDropDownOpen" Value="True" />
<Setter Property="ItemsSource" Value="{Binding Path=TableBColumns}" />
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<TextBlock Text="{Binding}"></TextBlock>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</DataGridComboBoxColumn.ElementStyle>
<DataGridComboBoxColumn.EditingElementStyle>
<Style TargetType="ComboBox">
<Setter Property="ItemsSource" Value="{Binding Path=TableBColumns}" />
<Setter Property="IsDropDownOpen" Value="True" />
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<TextBlock Text="{Binding}"></TextBlock>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
</DataGridComboBoxColumn.EditingElementStyle>
</DataGridComboBoxColumn>
</DataGrid.Columns>
</DataGrid>
除了少数例外,因为老实说,我不明白丢失的部分应该包含什么。我正在尝试将列绑定到实体类中包含的字符串列表:
class JoinBlockDTO
{
public List<string> TableAColumns { get; set; }
public List<string> TableBColumns { get; set; }
}
在我后面的代码中,我设置了网格ItemsSource
:
DataGrid dg = (DataGrid)GetTemplateChild("joinGrid");
List<JoinBlockDTO> l = new List<JoinBlockDTO>();
List<string> colAList = (from DataRowView row in sourceA
select row.Row.Field<string>(0)).ToList();
List<string> colBList = (from DataRowView row in sourceB
select row.Row.Field<string>(0)).ToList();
((DataGridComboBoxColumn)dg.Columns[0]).ItemsSource = colAList; //doesn't work without this
((DataGridComboBoxColumn)dg.Columns[1]).ItemsSource = colBList; //doesn't work without this
l.Add (new JoinBlockDTO(){TableAColumns = colAList, TableBColumns = colBList});
dg.ItemsSource = l;
最初,所有这些都会渲染一个包含所有空白单元格的 2 x 2 网格。我单击两次以查看一个下拉列表,其中包含正确绑定的字符串列表。但是,当我从下拉列表中选择一个值并将焦点移到外部时,单元格将留空。有人可以指出应该向 XAML 添加或修改什么吗?有没有更简单的方法来做这个绑定?我已经阅读了许多有关此组合框列绑定的帖子,但无法理解发生了什么。(使用VS2010)