[英]WPF: Byte array to Image on a button in code behind
我嘗試了許多事情的組合,但沒有喜悅。
這是我認為應該工作的,但是我得到了一個空白按鈕:
ImageConverter ic = new ImageConverter();
System.Drawing.Image img = (System.Drawing.Image)ic.ConvertFrom myByteArray);
Bitmap bitmap = new Bitmap(img);
MemoryStream ms = new MemoryStream();
ImageBrush brush = new ImageBrush();
bitmap.Save(ms, ImageFormat.Png);
ms.Position = 0
BitmapImage bi = new BitmapImage();
bi.BeginInit();
bi.CreateOptions = BitmapCreateOptions.None;
bi.CacheOption = BitmapCacheOption.OnLoad;
bi.StreamSource = ms;
bi.EndInit();
brush.ImageSource = bi;
button.Background = brush;
歡迎任何建議...這也必須在后面的代碼中完成。
抱歉,我要使用的是WPF,MVVM方法。
此代碼的工作在一個對話窗口,但沒有其他:
所以我從主窗口打開一個對話窗口,然后打開另一個對話窗口,此代碼很好地顯示了按鈕上的圖像...但是,當我打開第三個對話窗口並嘗試相同的代碼時,按鈕為空白。 。
_stockButtons[i].Width = 100;
_stockButtons[i].Height = 100;
ImageBrush brush2 = new ImageBrush();
BitmapImage bitmap2 = new BitmapImage();
bitmap2.BeginInit();
bitmap2.UriSource = new Uri(@"C:\Users\Kevin\Pictures\test.jpg");
bitmap2.EndInit();
brush2.ImageSource = bitmap2;
_stockButtons[i].Background = brush2;
如果我使用上面的代碼將圖像加載到窗口的初始加載按鈕上,則圖像顯示為OK。問題似乎是當我在左列中選擇一個按鈕時,我顯示了一個金額( 1個或更多)與所單擊部門相關的項目的按鈕。 圖像似乎在某處丟失或未正確拉入? 這有意義嗎?
<Window x:Class="Views.WindowsViews.SelectStockDialogWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:ViewModel="clr-namespace:ViewModels;assembly=ViewModels"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:dxc="http://schemas.devexpress.com/winfx/2008/xaml/core"
xmlns:dxd="http://schemas.devexpress.com/winfx/2008/xaml/docking"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:Support="clr-namespace:Support;assembly=Support"
xmlns:theme="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Royale"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" Title="Select stock item"
mc:Ignorable="d" WindowStartupLocation="CenterScreen" Width="585" Height="600" >
<Window.Resources>
<ResourceDictionary>
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/Views;component/Styles/Brushes.xaml" />
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</Window.Resources>
<dxd:DockLayoutManager Name="dlSalesScreen">
<dxd:DockLayoutManager.LayoutRoot>
<dxd:LayoutGroup Name="Root" Orientation="Horizontal" AllowSplitters="False">
<dxd:LayoutPanel AllowClose="False" AllowRename="False"
Caption="Departments" HorizontalScrollBarVisibility="Hidden"
CaptionAlignMode="AutoSize"
CaptionImageLocation="BeforeText" ShowPinButton="False" >
<!-- Scrollviewer for department buttons-->
<ScrollViewer x:Name="deptScrollviewer" Grid.Row="0" Grid.Column="0" Width="185" Height="Auto" HorizontalScrollBarVisibility="Hidden" VerticalScrollBarVisibility="Hidden" PanningMode="VerticalOnly">
<ItemsControl ItemsSource="{Binding Departments}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel VerticalAlignment="Top" Height="Auto" Orientation="Vertical" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</ScrollViewer>
</dxd:LayoutPanel>
<dxd:LayoutPanel AllowClose="False" AllowRename="False"
Caption="Available stock in department" Width="Auto"
CaptionAlignMode="AutoSize"
CaptionImageLocation="BeforeText" ShowPinButton="False">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="50" />
</Grid.RowDefinitions>
<!-- Scrollviewer for stock buttons-->
<ScrollViewer x:Name="stockScrollViewer" Grid.Row="0" Width="Auto" Height="Auto" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto" PanningMode="VerticalOnly">
<ItemsControl ItemsSource="{Binding StockItems, UpdateSourceTrigger=PropertyChanged}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel VerticalAlignment="Top" HorizontalAlignment="Left" Orientation="Horizontal" Width="400" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</ScrollViewer>
<Rectangle Grid.Row="1" Margin="0,0,0,0" Height="Auto" Fill="{StaticResource BottomRectangleGradient}" />
<Grid Name="gridButtonHolder" Grid.Row="2">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<GroupBox x:Name="grpStockItem" Grid.Column="0" Header="Selected Item" HorizontalAlignment="Left" Width="200" >
<Label x:Name="lblStockName" Content="{Binding SelectedStockItemLabel}" HorizontalAlignment="Left" />
</GroupBox>
<Button Name="btnSave" Content="Apply" Command="{Binding ConfirmSelectionCommand}" dxc:ThemeManager.ThemeName="Office2007Blue" Grid.Column="1" Width="110" Height="42" Margin="0,8,0,0" />
<Button Name="btnClose" Content="Cancel" dxc:ThemeManager.ThemeName="Office2007Blue" Grid.Column="2" Width="110" Height="42" Margin="0,8,0,0" />
</Grid>
</Grid>
</dxd:LayoutPanel>
</dxd:LayoutGroup>
</dxd:DockLayoutManager.LayoutRoot>
</dxd:DockLayoutManager>
</Window>
試試看(不使用WinForms圖像)
ImageBrush brush;
BitmapImage bi;
using (var ms = new MemoryStream(myByteArray))
{
brush = new ImageBrush();
bi = new BitmapImage();
bi.BeginInit();
bi.CreateOptions = BitmapCreateOptions.None;
bi.CacheOption = BitmapCacheOption.OnLoad;
bi.StreamSource = ms;
bi.EndInit();
}
brush.ImageSource = bi;
button.Background = brush;
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