wpf 在组合框中显示字典 [key, value] 但在选择后只显示 [key]
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Show dictionary [key, value] in combobox but only [key] after selection
提问by user3357963
I have a dictionary which I want to allow the keys to be selected in a combobox but also display the value without having to create another column.
我有一个字典，我想允许在组合框中选择键，但也可以显示值而不必创建另一列。
For instance, if my dictionary consists of 3 items for now
例如，如果我的字典现在包含 3 个项目
Dictionary<string, double> test = new Dictionary<string, double>();
//KEY , VALUE
//"Item1" , 4.0
//"Item2" , 4.5
//"Item3" , 5.0
I want the combobox pulldown list to display the available selections showing BOTH key and value
我希望组合框下拉列表显示可用的选择，同时显示键和值
[Item1, 4.0]
[Item2, 4.5]
[Item3, 5.0]
and say if [Item2, 4.5]is selected then only the key is displayed in the combobox as the current selection, in this case the following would display after selection...
并说如果[Item2, 4.5]被选中，则只有键作为当前选择显示在组合框中，在这种情况下，选择后将显示以下内容...
Item2
Item2
I've tried the following but this shows [key,value]in both the combobox selection list and after selection
我尝试了以下操作，但这[key,value]在组合框选择列表和选择后都显示
comboboxColumn2.SelectedValuePath= "Key";
comboboxColumn2.ItemsSource = test;
I've also tried using combinations with comboboxColumn2.DisplayMemberPath= "Value";but cannot get it formatted as I would like.
我也尝试过使用与的组合，comboboxColumn2.DisplayMemberPath= "Value";但无法按照我的意愿对其进行格式化。
Can anyone say if it's possible and what the correct syntax is?
谁能说这是否可能以及正确的语法是什么？
EDIT:
编辑：
The combobox are actually ComboboxColumns so there are only 2 events available which don't appear very useful
组合框实际上是 ComboboxColumns，因此只有 2 个可用的事件看起来不是很有用
<DataGrid.Columns>
<DataGridComboBoxColumn Header="Department Id" x:Name="comboboxColumn1"
SelectedValueBinding="{Binding Department Id}" />
<DataGridComboBoxColumn Header="Department Id" x:Name="comboboxColumn2"
SelectedValueBinding="{Binding Department Name}"/>
</DataGrid.Columns>
回答by Vinicius
If you want to do this on code behind here it is :
如果你想在后面的代码上做到这一点，它是：
<ComboBox Height="23" HorizontalAlignment="Left" Margin="168,100,0,0" Name="comboBox1" VerticalAlignment="Top" Width="120" DropDownOpened="comboBox1_DropDownOpened" DropDownClosed="comboBox1_DropDownClosed" />
public MainPage()
{
InitializeComponent();
var source = new Dictionary<string, double>();
source.Add("Item1", 0.4);
source.Add("Item2", 0.3);
source.Add("Item3", 0.1);
var formateDSource = new Dictionary<string, string>();
foreach (var item in source)
{
formateDSource.Add(string.Format("[{0}, {1}]", item.Key, item.Value), item.Key);
}
comboBox1.ItemsSource = formateDSource;
comboBox1.DisplayMemberPath = "Value";
}
private void comboBox1_DropDownOpened(object sender, EventArgs e)
{
comboBox1.DisplayMemberPath = "Key";
}
private void comboBox1_DropDownClosed(object sender, EventArgs e)
{
comboBox1.DisplayMemberPath = "Value";
}
I just created an formatedSource and then changed the displayMemberPath according to your description.
我刚刚创建了一个 formatedSource，然后根据您的描述更改了 displayMemberPath。
Hope it helps
希望能帮助到你
