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如何在Xamarin表格的网格中插入背景图像pcl

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我需要将背景放到网格上，即PNG图像 . 我在网上找不到具体的解决方案，你可以从xaml添加吗？或必须通过c＃行动？

谢谢 .

<StackLayout VerticalOptions="FillAndExpand" x:Name="allContent" HorizontalOptions="FillAndExpand" Orientation="Vertical" Spacing="0">    
<Grid Grid.Row="1">
              <Grid.ColumnDefinitions>
                <ColumnDefinition Width="2*"></ColumnDefinition>
                <ColumnDefinition Width="6*"></ColumnDefinition>
                <ColumnDefinition Width="2*"></ColumnDefinition>
              </Grid.ColumnDefinitions>
              <Grid.RowDefinitions>
                <RowDefinition Height="1*"></RowDefinition>
                <RowDefinition Height="2*"></RowDefinition>
                <RowDefinition Height="2*"></RowDefinition>
                <RowDefinition Height="2*"></RowDefinition>
                <RowDefinition Height="2*"></RowDefinition>
              </Grid.RowDefinitions>
              <ActivityIndicator x:Name="loading" Grid.Row="0" Grid.Column="1" IsVisible="false" Color="#008ECC" IsRunning="true" />
              <Label TextColor="#fff" Grid.Row="1" Grid.Column="1" Text="" />
              <Entry FontSize="24" Grid.Row="1" Grid.Column="1" Placeholder="Username" x:Name="UsernameEntry" Text="" />
              <Label TextColor="#fff" Grid.Row="2" Grid.Column="1" Text="" />
              <Entry FontSize="24" Grid.Row="2" Grid.Column="1" Placeholder="Password" IsPassword="True" x:Name="PasswordEntry" Text="" />
              <Button x:Name="LoginButton" Grid.Row="3" Grid.Column="1" Text="Accedi" Clicked="Login_OnClicked"/>
              <Label TextColor="#fff" Text="Ricorda accesso" Grid.Row="3" Grid.Column="1"></Label>
              <Switch x:Name="switchRememberPassword" Grid.Row="4" Grid.Column="1"></Switch>              
              <Label x:Name="recuperaPassword" Grid.Row="4" Grid.Column="1" TextColor="#fff" Text="Recupera credenziali di accesso" FontSize="12"></Label>
            </Grid>
</StackLayout>
c# xaml xamarin xamarin.forms portable-class-library

4 回答

  • 0

    您可以将其添加为Grid的子项，并添加Grid.ColumnSpan和Grid.RowSpan属性以跨越所有网格 . 例如：

    <Grid>
        <Image HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" Aspect="AspectFill" Source="" Grid.Row="6" Grid.Column="4" Grid.RowSpan="2" Grid.ColumnSpan="2"/>
            <!-- My other properties here code here-->
     </Grid>

    （此外，如果您的网格位于ContentPage上并占据整个屏幕，则可以使用页面的属性BackgroundImage）

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  • 3
    <RelativeLayout>
<Image Aspect="Fill" Source="Jupiter.png" Opacity="0.3"
            RelativeLayout.WidthConstraint=
              "{ConstraintExpression Type=RelativeToParent, Property=Width}"
            RelativeLayout.HeightConstraint=
              "{ConstraintExpression Type=RelativeToParent, Property=Height}"/>
<Grid RelativeLayout.WidthConstraint=
          "{ConstraintExpression Type=RelativeToParent, Property=Width}"
        RelativeLayout.HeightConstraint=
          "{ConstraintExpression Type=RelativeToParent, Property=Height}">

  <Label Text="Hello world from XAML" VerticalOptions="Center"
     HorizontalOptions="Center" FontSize="30"/>
</Grid>
    回复于
  • 1

    你可以使用RelativeLayout

    <RelativeLayout>
       <Image Source="backgroundimage"   RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=1}" 
     RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Factor=1}" />
       <Grid RelativeLayout.WidthConstraint="{ConstraintExpression Type=RelativeToParent, Property=Width, Factor=1}" 
     RelativeLayout.HeightConstraint="{ConstraintExpression Type=RelativeToParent, Property=Height, Factor=1}"> 

//Your grid content


       </Grid>
    </RelativeLayout>
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  • 0

    在Xamarin Forms XAML上没有ImageBrush，也没有gridView ..只是类似的网格布局，而现在，它只接受背景颜色

    要添加图像，您应该执行以下操作：

    <Grid>
<Image Source="imgBackground.png" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" Aspect="AspectFill"/>
</Grid>
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