WPF：后面的代码中按钮上的图像的字节数组

Question

I have tried many combinations of things but with no joy.

Here is what i think should work, but I get a blank button:

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;

Any suggestions welcome... this has to be done in the code behind also.

EDIT:

Sorry, just to add that I am using WPF, MVVM approach.

This code works on one dialog window but NOT on another:

So I open a dialog window from the main window and then open another dialog window, this code shows the image on the buttons fine... however when i open a 3rd dialog window, and try the same code, the buttons are blank...

_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;

If I use the above code to load the images into the buttons on the initial load of the window, the images are displayed OK... The issue seems to be when I select a button on the left column, then I display an amount (1 or more) of buttons for the items related to the clicked department. The image seems to be lost somewhere or not being pulled in correctly? Does that makes sense?

XAML:

<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>

Answer 1

Try this (without using the WinForms images)

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;