C# 显示数据库默认值的WPF组合框
我正在使用MongoDB数据库,我想在combobox中显示来自MongoDB的数据作为默认值。但我不知道怎么做 这是我的XAMLC# 显示数据库默认值的WPF组合框,c#,wpf,mongodb,combobox,binding,C#,Wpf,Mongodb,Combobox,Binding,我正在使用MongoDB数据库,我想在combobox中显示来自MongoDB的数据作为默认值。但我不知道怎么做 这是我的XAML <DataGridTextColumn Header="Kaina" Binding="{Binding full_price}" CanUserReorder="False" IsReadOnly="True"/> <DataGridTextColumn Header="DV
<DataGridTextColumn Header="Kaina" Binding="{Binding full_price}" CanUserReorder="False"
IsReadOnly="True"/>
<DataGridTextColumn Header="DV" Binding="{Binding order_quantity}" CanUserReorder="False"
IsReadOnly="True"/>
<DataGridTemplateColumn Header="Stalviršio tipas">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox x:Name="TableTop" DropDownClosed="TableTop_DropDownClosed" Text="fg">
<ComboBoxItem Content="A" />
<ComboBoxItem Content="B" />
<ComboBoxItem Content="C" />
</ComboBox>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
我想将“桌面字母”从MongoDB显示到“桌面”组合框作为默认值。你能帮我吗?我找到了这个链接
应用了一些修改,它工作了
<DataGridTemplateColumn Header="Stalviršio tipas">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Grid>
<ComboBox x:Name="TableTop" DropDownClosed="TableTop_DropDownClosed" ItemsSource="{Binding}">
<ComboBoxItem Content="" />
<ComboBoxItem Content="A" />
<ComboBoxItem Content="B" />
<ComboBoxItem Content="C" />
</ComboBox>
<TextBlock Text="{Binding tabletop_letter}" IsHitTestVisible="False">
<TextBlock.Style>
<Style TargetType="TextBlock">
<Setter Property="Visibility" Value="Hidden"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=TableTop,Path=SelectedItem}" Value="{x:Null}">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
</Grid>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
您是否已完成代码中的MongoDB查询部分?是的,我已完成<代码>//查找“产品”集合中的所有文档-->var allDocuments=Classes.MdB.connectDbProducts().Find(new BsonDocument()).ToList()//将MongoDB数据绑定到GridView-->Classes.MdB.GridView(productsGrid,allDocuments)//将数据绑定到DataGrid-->公共静态void GridView(DataGrid DATAGRIDAS,列表游标){Binding bind bind=new Binding();DATAGRIDAS.DataContext=cursor;DATAGRIDAS.SetBinding(ListView.ItemsSourceProperty,bind);}
<DataGridTemplateColumn Header="Stalviršio tipas">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<Grid>
<ComboBox x:Name="TableTop" DropDownClosed="TableTop_DropDownClosed" ItemsSource="{Binding}">
<ComboBoxItem Content="" />
<ComboBoxItem Content="A" />
<ComboBoxItem Content="B" />
<ComboBoxItem Content="C" />
</ComboBox>
<TextBlock Text="{Binding tabletop_letter}" IsHitTestVisible="False">
<TextBlock.Style>
<Style TargetType="TextBlock">
<Setter Property="Visibility" Value="Hidden"/>
<Style.Triggers>
<DataTrigger Binding="{Binding ElementName=TableTop,Path=SelectedItem}" Value="{x:Null}">
<Setter Property="Visibility" Value="Visible"/>
</DataTrigger>
</Style.Triggers>
</Style>
</TextBlock.Style>
</TextBlock>
</Grid>
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>