小编Atu*_*uka的帖子

我是xamarin.forms的新手.请帮我解释如何在Stack Layout或Frame中添加click事件

<Frame Grid.Column="0" BackgroundColor="#ffffff" Grid.Row="0" HasShadow="true" OutlineColor = "Black">
</Frame>


<StackLayout Grid.Column="0" BackgroundColor="#313FA0" Grid.Row="0">
</StackLayout>

在给出edittext字段中输入的时候,如果有人将IP地址的IP地址格式放入应该像这些000.000.0.000 plz帮助我那么显示错误

在HTML5中: -

<div data-role="content">
     <form id="form">
         <div data-role="fieldcontain">
                    <label for="ip">IP Address/System Name</label>
                    <input name="ip" id="ip" type="text" pattern="((^|\.)((25[0-5])|(2[0-4]\d)|(1\d\d)|([1-9]?\d))){4}$">                       
         </div>
         <div style="text-align:center;">                   
                    <div data-role="button" data-theme="b" data-inline="true" id="button1">Update</div>
         </div> 
</div>

如何在ListView中使用数据绑定创建Grid？我正在用Xamarin.Forms创建这个应用程序.

如果我不知道我需要多少行和列,如何在ListView绑定中动态创建Grid？

这是我到目前为止:

<ListView x:Name="List" HasUnevenRows="True">
  <ListView.ItemTemplate>
   <DataTemplate>
    <ViewCell>
      <ViewCell.View>
        <Grid Padding="10,10,10,10">
          <Grid.RowDefinitions>
            <RowDefinition Height="200"></RowDefinition>
          </Grid.RowDefinitions>
          <Grid.ColumnDefinitions>
            <ColumnDefinition  Width="200"></ColumnDefinition>
          </Grid.ColumnDefinitions>
          <StackLayout BackgroundColor="#313FA0" Grid.Row="0" Grid.Column="0" HeightRequest="200" WidthRequest="200">
            <Label Text="{Binding NUMBER}" FontSize="50" TextColor="White" HorizontalOptions="CenterAndExpand" VerticalOptions="CenterAndExpand"/>
            <Label Text="{Binding NAME}" FontSize="30" TextColor="White" HorizontalOptions="CenterAndExpand" VerticalOptions="CenterAndExpand"/>
          </StackLayout>
        </Grid>
      </ViewCell.View>
    </ViewCell>
   </DataTemplate>
  </ListView.ItemTemplate>
</ListView>

在此代码中,只创建了一行和一列.如果我有多个数据点,我该如何解决这个问题？例如,如果我需要一行有两列.

提前致谢.

我是Xamarin.Forms的新手,我需要加载消息,我可以显示加载消息,请帮助我

码:-

<AbsoluteLayout>
  <StackLayout HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand" AbsoluteLayout.LayoutBounds="0, 0, 1, 1"
  AbsoluteLayout.LayoutFlags="All" Padding="30" >
  <Grid>
   //something
  </Grid>
  </StackLayout>
  <ContentView x:Name="overlay" AbsoluteLayout.LayoutBounds="0, 0, 1, 1"  AbsoluteLayout.LayoutFlags="All" IsVisible="False" BackgroundColor="#C0808080" Padding="10, 0">
    <ActivityIndicator  WidthRequest="110" HeightRequest="70" IsRunning="True" IsVisible="True" Color="Black" HorizontalOptions="CenterAndExpand" VerticalOptions="CenterAndExpand"/>
  </ContentView>
</AbsoluteLayout>

Thanx提前

干杯