如何将组合框单元格绑定到“拆分的"单元格? DataTabe列中的字符串 [英] How to bind ComboBox cell to "splitted" String in DataTabe Column

问题描述

大家好，

我无法弄清楚...例如，我有带有"ID"和名称"列的数据表"Table1".
行看起来像:
身份证名称
1个test1 | test2 | test3
2 test4 | test5 | test6

我这样绑定ID列:

Hi guys,

I can''t figured it out... For example I have DataTable "Table1" with "ID" and "Names" columns.
Rows look like:
ID Names
1 test1|test2|test3
2 test4|test5|test6

I bind ID column like this:

C#
...
DataSet dataset = new DataSet();
DataGridView.ItemSource = dataset.Table1.DefaultView;
...

XAML
...
<DataGrid.Columns>
 <DataGridTextColumn Binding="{Binding Path=ID}" Header="ID" />
...

这部分效果很好.但是如何在我的情况下为名称"绑定组合框列?

请给我指示.谢谢.

[更新]
每行的名称"在DataSet中具有类似"test1 | test2 | test3"的值.
我正在寻找使用ComboBox在DataGridView行中从DataSet中显示值"test1 | test2 | test3"的解决方案，其中将包含以下项目:
-test1
-test2
-test3

让我知道是否还不清楚

Timur.

This part works well. But how can I bind combobox column for "Names" in my situation?

Please give me direction. Thank you.

[UPDATE]
"Names" has values like "test1|test2|test3" in DataSet for each row.
I''m looking for solution to display value "test1|test2|test3" from DataSet in DataGridView row with ComboBox which will have items:
- test1
- test2
- test3

Let me know if it''s still unclear

Timur.

推荐答案

在您的ViewModel中定义一个属性，例如:

In your ViewModel define a property like:

public IEnumerable<string> Names
{
get
{
   return nameColumn.Split(''|'');
}
}

然后将您的ComboBox ItemsSource绑定到名称

好的，ViewModel将如下所示:

Then bind your ComboBox ItemsSource to Names

Ok, the ViewModel will look like:

public class MainViewModel
{
    private string contentNames = "test1|test2|test3";

    public IEnumerable<string> SplitContentNames
    {
        get
        {
            return contentNames.Split(''|'');
        }
    }
}

XAML如下所示:

The XAML will look like:

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>
    <ComboBox ItemsSource="{Binding SplitContentNames}"/>
</Grid>

MainViewWindow.cs后面的代码将像这样绑定DtaContext:

And the code behind of MainViewWindow.cs will bind the DtaContext like so:

this.DataContext = new MainViewModel();

然后将所选项目放入视图模型，为所选项目添加一个属性:

Then to get the selected item into your view model, add a property for your selected item:

public string SelectedName
{
    get;
    set;
}

然后使用XAML绑定SelectedValue:

and then bind the SelectedValue using XAML:

<ComboBox ItemsSource="{Binding SplitContentNames}" SelectedValue="{Binding SelectedName}"/>

现在，当您更改组合框中的值时，将在SelectedName属性中设置当前值.

Now when you change the value in the combobox the current value will be set in the SelectedName property.

好的，这里表示的任何解决方案都不适合我.

我又自己解决了.解决方法如下:

创建类，如:

Okay, any solutions represented here do not work for me.

I solved by myself again. Here is the solution:

Create class like:

[ValueConversion(typeof(String), typeof(String))]
public class StringSplitterConverter : IValueConverter
{

    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        return value.ToString().Split('|');
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        return value;
    }
}

在组合框绑定中使用此转换器:

Use this converter in combobox binding:

...
            <datagrid.resources>
                <local:stringsplitterconverter x:key="splitterConverter" xmlns:x="#unknown" xmlns:local="#unknown" />
            </datagrid.resources>
...
                    <datagridtemplatecolumn.celltemplate>
                        <datatemplate>
                            <combobox itemssource="{Binding Path=ContentNames, Converter={StaticResource splitterConverter}}"></combobox>
                        </datatemplate>
                    </datagridtemplatecolumn.celltemplate>

此解决方案效果很好.

This solution works great.

尝试一下

<datagridcomboboxcolumn header="Column Header" selecteditembinding="{Binding ID} DisplayMemberPath=" hold=" /></pre><br mode="></datagridcomboboxcolumn>

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