图片显示的几种方法

发布时间：2020-06-18 09:02:08 阅读：358 作者：windows_phone 栏目：开发技术

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public partial class ImageShow : PhoneApplicationPage     {         public ImageShow()         {             InitializeComponent();         }           /// <summary>         /// 通过BitmapImage（URI）方式         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void Button_Click(object sender, RoutedEventArgs e)         {             string uri = "/PhoneApp1;component/Images/1.jpg";             BitmapImage bt = new BitmapImage(new Uri(uri,UriKind.RelativeOrAbsolute));             p_w_picpath2.Source = bt;           }          /// <summary>         /// 通过流Stream方式         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void Button_Click_1(object sender, RoutedEventArgs e)         {             string uri = "/PhoneApp1;component/Images/2.jpg";             Stream imgStream = Application.GetResourceStream(new Uri(uri,UriKind.RelativeOrAbsolute)).Stream;             BitmapImage bt = new BitmapImage();             bt.SetSource(imgStream);             p_w_picpath2.Source = bt;         }          private void Button_Click_2(object sender, RoutedEventArgs e)         {             WriteableBitmap wbt = new WriteableBitmap(300,300);             for (int i = 0; i < wbt.Pixels.Length; i++)             {                 wbt.Pixels[i] = int.MaxValue;             }             p_w_picpath2.Source = wbt;         }          private void Button_Click_3(object sender, RoutedEventArgs e)         {             WriteableBitmap wbt = new WriteableBitmap(this.LayoutRoot, null);             p_w_picpath2.Source=wbt;         }     }

Xaml

<Grid x:Name="LayoutRoot" Background="Transparent">         <Grid.RowDefinitions>             <RowDefinition Height="Auto"/>             <RowDefinition Height="Auto"/>             <RowDefinition Height="Auto"/>             <RowDefinition Height="Auto"/>             <RowDefinition Height="Auto"/>             <RowDefinition Height="Auto"/>         </Grid.RowDefinitions>         <Image Name="p_w_picpath2"  Height="400"></Image>         <Button Grid.Row="1" Click="Button_Click" Content="LoadImageByUri" Width="300"></Button>         <Button Grid.Row="2"  Click="Button_Click_1" Content="LoadImageByStream" Width="300"></Button>                  <Button Content="LoadFromWriteBitmapByPiexel" Click="Button_Click_2" Grid.Row="4"></Button>         <Button Content="LoadFromWriteBitmapByElement" Click="Button_Click_3" Grid.Row="5"></Button>     </Grid>