Question

I m completely new to WPF i want to get selected element in mygrid its have array of contacts objects i need access to the selected contact and get the Contactid to use in some methods like deleteContactByID() when user click the delete Button and refresh the grid to hide the row is deleted

<Window x:Class="WPFClient.ListOFContacts"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="ListOFContacts" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" Height="450" Width="700" xmlns:my="clr-namespace:WPFClient.PhoneBookServiceReference" Loaded="Window_Loaded">
    <Window.Resources>
        <CollectionViewSource x:Key="contactViewSource" d:DesignSource="{d:DesignInstance my:Contact, CreateList=True}" />
    </Window.Resources>
        <Grid DataContext="{StaticResource contactViewSource}" Name="myGrid" AllowDrop="True" ShowGridLines="False">
        <DataGrid AutoGenerateColumns="False" EnableRowVirtualization="True" Height="387" HorizontalAlignment="Left" ItemsSource="{Binding}" Margin="12,12,0,0" Name="contactDataGrid" RowDetailsVisibilityMode="VisibleWhenSelected" VerticalAlignment="Top" Width="654" SelectionChanged="contactDataGrid_SelectionChanged">

             <DataGrid.Columns>

                <DataGridTemplateColumn x:Name="nameColumn" Header="Name" Width="auto">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Path=Name}" />
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>


                <DataGridTemplateColumn x:Name="emailColumn" Header="Email" Width="auto">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Path=Email}" />
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>


                <DataGridTemplateColumn x:Name="phoneNumberColumn" Header="Phone Number" Width="auto">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Path=PhoneNumber}" />
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>



                <DataGridTemplateColumn x:Name="addressColumn" Header="Address" Width="auto">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Path=Address}" />
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>


                <DataGridTemplateColumn x:Name="mobilColumn" Header="Mobil" Width="auto">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Path=Mobil}" />
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>


                <DataGridTemplateColumn x:Name="Delete" Header="Delete" Width="auto">
                    <DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Button Name="btnDelete">Delete</Button>
                        </DataTemplate>
                    </DataGridTemplateColumn.CellTemplate>
                </DataGridTemplateColumn>

            </DataGrid.Columns>
        </DataGrid>
    </Grid>
</Window>

Answer 1

您应该将 DataGrid 的 Sective 属性绑在您数据格式类型中的属性上。在删除处理器上,您只需访问您的类型属性即可获得选中的联系人。在您的情况下 :

<DataGrid SelectedItem={Binding SelectedContact} AutoGenerateColumns="False" EnableRowVirtualization="True" Height="387" HorizontalAlignment="Left" ItemsSource="{Binding}" Margin="12,12,0,0" Name="contactDataGrid" RowDetailsVisibilityMode="VisibleWhenSelected" VerticalAlignment="Top" Width="654" SelectionChanged="contactDataGrid_SelectionChanged">

如果您已将 DataContext 设置为 ViewModel , 那么您就需要在您的视图模式类中拥有一个属性 < code> SectiveContact , 正如您可能对其它属性所做的那样。

public Contact SelectedContact
{
    get; set; // Calling the NotifyPropertyChanged 
}

然后在您的处理器中,您只需要访问选中的 Contact proeprty 即可获得选中的联系人。

void handler()
{
    var selectedContact = SelectedContact;
    var contactId = selectedContact.ContactId; 
}

我希望这能消除你们的疑虑。

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