绑定到List< String>的DataGridComboBoxColumnColumn。 [英] DataGridComboBoxColumn Binding to a List<String>

问题描述

我有一个包含数据网格的WPF应用程序。数据网格绑定到我的对象OrderBlock，其中包含Orders类型的列表。

I have a WPF application that contains a datagrid. The datagrid is bound to my object OrderBlock which contains a List of type Orders.

<DataGrid DataContext="{Binding OrderBlock}"
                  Name="dataGridOrdersGood" 
                  ItemsSource="{Binding Orders}"

这工作正常，并在我的datagrid中很好地显示。我的列表中有一个属性（StatusGood），但我想显示为组合框，其中只能有两个值 Send或 Hold。

This works fine and displays nicely in my datagrid. There is one property (StatusGood) in my List though that I would like to display as a combobox where there can be only two values, "Send" or "Hold".

因此，我试图将组合框值绑定到List StatusList，如下所示。然后尝试将实际值绑定到我的对象。

So I was trying to bind the combobox values to the List StatusList as shown below. Then trying to bind the actual value to my object.

public class ViewModel : INotifyPropertyChanged 
{
    public List<string> StatusList;

    // constructor
    public ViewModel() 
    {
        StatusList = new List<string>();
        StatusList.Add("Hold");
        StatusList.Add("Send");
    }
 }

<DataGridComboBoxColumn Header="Status Good" SelectedItemBinding="{Binding StatusList}"    SelectedValuePath="{Binding StatusGood}"/>

但是，除了空的组合框以外，什么都没有显示。我不明白为什么我的组合框至少没有显示对象的价值？我提供的是列表，因此我再次不明白为什么它没有显示任何内容。

However nothing is displayed other than a empty combobox. I do not understand why at the very least my combobox is not showing the value of my object? I am providing a list so again I do not understand why it's not showing anything.

我是WPF的新手，必须努力理解它。我已经引用了，但显然没有完全理解。 http://msdn.microsoft.com/en-us /library/system.windows.controls.datagridcomboboxcolumn.aspx

I'm new to WPF and must struggling to understand it. I have referenced but obviously not fully understand it. http://msdn.microsoft.com/en-us/library/system.windows.controls.datagridcomboboxcolumn.aspx

任何帮助都会很棒！
谢谢，
M

Any help would be great! Thanks, M

推荐答案

看起来DataGridComboBoxColumn-> SelectedItemBinding必须在您的情况下：

It looks like DataGridComboBoxColumn->SelectedItemBinding has to be in your case:

 SelectedItemBinding="{Binding StatusGood}"

，还必须设置DataGridComboBoxColumn的ItemsSource属性，并修改ViewModel以提供组合值以使用property（StatusList）代替字段。

and you have to set also ItemsSource property of the DataGridComboBoxColumn and modify your ViewModel for providing combo values to use property(StatusList) instead of field.

VM：

public class ViewModel 
{
    public List<string> StatusList { get; set; }

    // constructor
    public ViewModel()
    {
        StatusList = new List<string>();
        StatusList.Add("Hold");
        StatusList.Add("Send");
    }

}

XAML：

 <DataGrid.Resources>
        <local:ViewModel x:Key="ComboItems"  />
 </DataGrid.Resources>

<DataGridComboBoxColumn SelectedItemBinding="{Binding StatusGood}" ItemsSource="{Binding Path=StatusList, Source={StaticResource ComboItems}}" >

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