我有一个绑定到枚举的DataGridComboBoxColumn。下拉列表会正确显示enum的值,但组合框最初不会显示任何值。我试图将所选值绑定到DataTable的Gender属性,该属性是我的DataGrid的来源。我在类似SelectedItemBinding="{Binding Gender}"
或SelectedValueBinding="{Binding Gender}"
的类似问题中尝试了这些方法,但它们对我不起作用。
我也尝试过将组合框放在DataGridTemplateColumn内,但最初我尝试SelectedValue="{Binding Gender}"
和SelectedValuePath="{Binding Gender}"
却没有显示Gender值,但无济于事。 SelectedIndex = "0"
有用,但是对我来说毫无用处,因为我希望初始值来自某个属性。
当我将属性绑定到DataGridTextColumn时,绑定将起作用,因为它显示正确的值,即male / female。
XAML:
<ObjectDataProvider x:Key="genderEnum" xmlns:sys="clr-namespace:System;assembly=mscorlib" MethodName="GetValues" ObjectType="{x:Type sys:Enum}">
<ObjectDataProvider.MethodParameters>
<x:Type TypeName="enumLoc:Gender"/>
</ObjectDataProvider.MethodParameters>
</ObjectDataProvider>
<Grid DataContext="ViewMembers.xaml.cs">
<DataGrid x:Name="memberDataGrid" AutoGenerateColumns="False" EnableRowVirtualization="True" ItemsSource="{Binding Path=memberTable, Mode=TwoWay}" RowDetailsVisibilityMode="VisibleWhenSelected" Width="1200" Height="600" GridLinesVisibility="None" >
<DataGrid.Columns>
<DataGridComboBoxColumn x:Name="memberGenderColumn" SelectedItemBinding="{Binding Gender}" ItemsSource="{Binding Source={StaticResource genderEnum}}" Header="Gender" Width="60">
<DataGridTemplateColumn Header="Gender">
<DataGridTemplateColumn.CellTemplate>
<DataTemplate>
<ComboBox ItemsSource="{Binding Source={StaticResource genderEnum}}" SelectedValue="{Binding Gender}" />
</DataTemplate>
</DataGridTemplateColumn.CellTemplate>
</DataGridTemplateColumn>
XAML.cs:
DataTable memberTable = new DataTable();
MemberDatabase members = MemberDatabase.GetApplicationDatabase();
public ViewMembers()
{
InitializeComponent();
memberTable = members.GetAllMembers();
memberTable.AsEnumerable().ToList().ForEach(row =>
{
var cellList = row.ItemArray.ToList();
row.ItemArray = cellList.Select(x => x.ToString().Trim()).ToArray();
});
this.DataContext = memberTable;
memberDataGrid.ItemsSource = memberTable.DefaultView;
}
答案 0 :(得分:2)
您可以通过创建一个非常简单的转换器类(从int
转换为枚举)来实现此目的:
public class EnumConverter : IValueConverter
{
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
return (Gender)value;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
return value;
}
}
XAML:
<DataGrid x:Name="memberDataGrid" ...>
<DataGrid.Resources>
<local:EnumConverter x:Key="EnumConverter" />
</DataGrid.Resources>
<DataGrid.Columns>
<DataGridComboBoxColumn x:Name="memberGenderColumn"
SelectedItemBinding="{Binding Gender, Converter={StaticResource EnumConverter}}"
ItemsSource="{Binding Source={StaticResource genderEnum}}" Header="Gender" Width="60">
</DataGridComboBoxColumn>
</DataGrid.Columns>
</DataGrid>