visual-studio - 部分声明不得在 Xamarin 中指定不同的基类

Question

我正在构建 Xamarin 跨平台应用

对于抽屉菜单，我遵循本教程:https://www.youtube.com/watch?v=aYjK0cPjZMQ

但问题是当我将 MainPage 从 ContentPage 更改为 MasterDetailPage 时，它显示了这个错误:

主页.XAML:

    <?xml version="1.0" encoding="utf-8" ?>
<MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:local="clr-namespace:Last_MSPL"
             x:Class="Last_MSPL.MainPage">

    <MasterDetailPage.Master>
        <ContentPage Title="Menu">
            <Grid BackgroundColor="Transparent">
                <Grid.RowDefinitions>
                    <RowDefinition Height="200" />
                    <RowDefinition Height="*" />
                </Grid.RowDefinitions>
                <Grid>
                    <Image Source="bg.png" Aspect="AspectFill" />
                    <StackLayout Padding="0,20,0,0" HorizontalOptions="CenterAndExpand" VerticalOptions="CenterAndExpand">
                        <Image Source="profile.png" Aspect="AspectFill" WidthRequest="85" HeightRequest="85" />
                        <Label Text="Xam Buddy" TextColor="White" FontSize="Large" />
                    </StackLayout>
                </Grid>
                <StackLayout  Grid.Row="1" Spacing="15">
                    <ListView x:Name="navigationDrawerList"
                  RowHeight="60"
                  SeparatorVisibility="None"
                  BackgroundColor="#e8e8e8"
                  ItemSelected="OnMenuItemSelected">
                        <ListView.ItemTemplate>
                            <DataTemplate>
                                <ViewCell>
                                    <!-- Main design for our menu items -->
                                    <StackLayout VerticalOptions="FillAndExpand"
                             Orientation="Horizontal"
                             Padding="20,10,0,10"
                             Spacing="20">
                                        <Image Source="{Binding Icon}"
                         WidthRequest="40"
                         HeightRequest="40"
                         VerticalOptions="Center" />
                                        <Label Text="{Binding Title}"
                         FontSize="Small"
                         VerticalOptions="Center"
                         TextColor="Black"/>
                                    </StackLayout>
                                </ViewCell>
                            </DataTemplate>
                        </ListView.ItemTemplate>
                    </ListView>
                </StackLayout>
            </Grid>
        </ContentPage>
    </MasterDetailPage.Master>
    <MasterDetailPage.Detail>
        <NavigationPage>
        </NavigationPage>
    </MasterDetailPage.Detail>

</MasterDetailPage>

帮助我解决这个问题，这样我才能继续前进，谢谢!

Answer 1

我只是清理我的项目，重建它就可以了因为从 xaml 生成的 .g.cs 没有被刷新所以它给出了这个错误