ComboBox を DataGrid の Selected Item にバインドする例はありますか? 私はたくさんの方法を試しましたが、うまくいかないようです。私はMVVMにかなり慣れていないので、何か間違ったことをしています。どんな助けでも大歓迎です。コンボボックスがデータグリッドに設定されているグリッドのデータコンテキストがありますが、データグリッドから行を選択してもコンボボックスは変更されません。すべてのテキスト ボックスにデータグリッドからのデータが取り込まれますが、コンボ ボックスは変更されません。問題のコンボボックスは cmbRoles です。
ありがとうございました、
RG
XAML は次のとおりです。
<UserControl x:Class="Compliance.Views.UserAdministrationView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Compliance"
xmlns:views="clr-namespace:Compliance.Views"
xmlns:helpers="clr-namespace:Compliance.Helpers"
xmlns:vm="clr-namespace:Compliance.ViewModels"
xmlns:telerik="http://schemas.telerik.com/2008/xaml/presentation"
mc:Ignorable="d"
d:DesignHeight="1000" d:DesignWidth="800">
<UserControl.Resources>
<helpers:ActiveStatusConverter x:Key="ActiveStatusConverter"/>
</UserControl.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center" Grid.Row="0" Margin="15">
<Label Content="User" Height="25" FontSize="14" HorizontalContentAlignment="Center" />
<Grid HorizontalAlignment="Center" VerticalAlignment="Top" DataContext="{Binding ElementName=usersDG, Path=SelectedItem}">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" MinHeight="35" />
</Grid.RowDefinitions>
<telerik:Label Content="User Name: " Grid.Column="0" Grid.Row="0" HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Grid.Column="1" Grid.Row="0" MinHeight="23" HorizontalAlignment="Left" VerticalAlignment="Center" MinWidth="180" MaxWidth="180" >
<TextBox.Text>
<Binding Path="UserName" Mode="TwoWay" ValidatesOnDataErrors="True" NotifyOnValidationError="True"/>
</TextBox.Text>
</TextBox>
<telerik:Label Content="First Name: " Grid.Column="2" Grid.Row="0" HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Grid.Column="3" Grid.Row="0" MinHeight="23" HorizontalAlignment="Left" VerticalAlignment="Center" MinWidth="180" MaxWidth="180">
<TextBox.Text>
<Binding Path="FirstName" Mode="TwoWay" ValidatesOnDataErrors="True" NotifyOnValidationError="True"/>
</TextBox.Text>
</TextBox>
<telerik:Label Content="Last Name: " Grid.Column="4" Grid.Row="0" HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Grid.Column="5" Grid.Row="0" MinHeight="23" HorizontalAlignment="Left" VerticalAlignment="Center" MinWidth="180" MaxWidth="180">
<TextBox.Text>
<Binding Path="LastName" Mode="TwoWay" ValidatesOnDataErrors="True" NotifyOnValidationError="True"/>
</TextBox.Text>
</TextBox>
<telerik:Label Content="Email: " Grid.Column="0" Grid.Row="1" HorizontalAlignment="Right" VerticalAlignment="Center" />
<TextBox Grid.Column="1" Grid.Row="1" MinHeight="23" HorizontalAlignment="Left" VerticalAlignment="Center" MinWidth="180" MaxWidth="180">
<TextBox.Text>
<Binding Path="Email" Mode="TwoWay" ValidatesOnDataErrors="True" NotifyOnValidationError="True"/>
</TextBox.Text>
</TextBox>
<telerik:Label Content="Active Status: " Grid.Column="2" Grid.Row="1" HorizontalAlignment="Right" VerticalAlignment="Center" />
<telerik:RadComboBox x:Name="comBoxActiveStatus" Grid.Column="3" Grid.Row="1" MinHeight="23" MinWidth="180" HorizontalAlignment="Left" VerticalAlignment="Center"
SelectedItem="{Binding Path=ActiveStatus,
Converter={StaticResource ResourceKey=ActiveStatusConverter},
Mode=TwoWay,
ValidatesOnExceptions=True,
NotifyOnValidationError=True}">
</telerik:RadComboBox>
<telerik:Label Content="Role: " Grid.Column="4" Grid.Row="1" HorizontalAlignment="Right" VerticalAlignment="Center" />
<telerik:RadComboBox x:Name="cmbRoles" DisplayMemberPath="RoleName"
Grid.Column="5"
Grid.ColumnSpan="3"
Grid.Row="1"
MinHeight="23"
HorizontalAlignment="Left"
ItemsSource="{Binding}"
Margin="5"
VerticalAlignment="Center"
MinWidth="180"
SelectedItem="{Binding RoleName}"
IsSynchronizedWithCurrentItem="True">
</telerik:RadComboBox>
<Button Grid.Column="0" Grid.Row="2" Grid.ColumnSpan="3" Content="Save User" Width="100" />
<Button Grid.Column="4" Grid.Row="2" Grid.ColumnSpan="3" Content="Add User" Width="100" />
</Grid>
</StackPanel>
<Border CornerRadius="10" BorderThickness="5" Grid.Row="1" VerticalAlignment="Top" HorizontalAlignment="Center">
<Grid HorizontalAlignment="Center" VerticalAlignment="Center">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
</Grid.RowDefinitions>
<Label Content="Users" Grid.Row="0" Height="25" FontSize="14" HorizontalContentAlignment="Center" />
<telerik:RadGridView x:Name="usersDG" ItemsSource="{Binding Users}" AutoGenerateColumns="False" ShowGroupPanel="False" IsReadOnly="True">
<telerik:RadGridView.Columns>
<telerik:GridViewDataColumn DataMemberBinding="{Binding UserName}" Header="User Name" />
<telerik:GridViewDataColumn DataMemberBinding="{Binding FirstName}" Header="First Name" />
<telerik:GridViewDataColumn DataMemberBinding="{Binding LastName}" Header="Last Name" />
<telerik:GridViewDataColumn DataMemberBinding="{Binding Email}" Header="Email" />
<telerik:GridViewDataColumn DataMemberBinding="{Binding Role.RoleName}" Header="Role Name" />
<telerik:GridViewDataColumn DataMemberBinding="{Binding ActiveStatus, Converter={StaticResource ActiveStatusConverter}}" Header="Active Status" />
</telerik:RadGridView.Columns>
</telerik:RadGridView>
</Grid>
</Border>
</Grid>