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闫驚鏵（Jinhua Yan） edited this page Nov 24, 2024 · 7 revisions

If you are concerned about memory usage, please use the following methodsissues 77

 var screenCaptureExt = new ScreenCaptureExt(); screenCaptureExt.SnapCanceled += ScreenCaptureExt_SnapCanceled; screenCaptureExt.SnapCompleted += ScreenCaptureExt_SnapCompleted; private void ScreenCaptureExt_SnapCompleted(System.Windows.Media.Imaging.BitmapSource bitmap) { //Completed } private void ScreenCaptureExt_SnapCanceled() { //Canceled }

CSharp

Application.Current.Dispatcher.Invoke(new Action(delegate { var screenCapturer = new ScreenCapture(); screenCapturer.SnapCompleted += ScreenCapturer_SnapCompleted; screenCapturer.SnapCanceled += ScreenCapturer_SnapCanceled; screenCapturer.Capture(); })); private void ScreenCapturer_SnapCanceled() { //Canceled } private void ScreenCapturer_SnapCompleted(CroppedBitmap bitmap) { //Completed }

When the loaded resource dictionary cannot be written in App.xaml, ScreenCapture and ScreenCut cannot be used normally when written in Window.Resources.

Solution 1

Introduce resources to the current page

<Window x:Class="WpfScreenCapture.ScreenCaptureWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:WpfScreenCapture" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:wd="https://github.com/WPFDevelopersOrg/WPFDevelopers" Title="Window1" Width="800" Height="450" mc:Ignorable="d"> <Window.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="pack://application:,,,/WPFDevelopers;component/Themes/Light.Blue.xaml" /> <!-- 需要注意 wd:Resources 必须在配色主题后，Theme="Dark" 为黑色皮肤 --> <wd:Resources Theme="Light" /> <ResourceDictionary Source="pack://application:,,,/WPFDevelopers;component/Themes/Theme.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Window.Resources> <Button Margin="0,10" HorizontalAlignment="Center" VerticalAlignment="Top" Click="Button_Click" Content="ScreenCapture" /> </Window>

Send its own Resources when showing the ScreenCapture control.

private void Button_Click(object sender, RoutedEventArgs e) { Dispatcher.Invoke(new Action(delegate { ScreenCapture screenCapturer = new ScreenCapture(resources: this.Resources); screenCapturer.Capture(); })); }

Solution 2

Start ScreenCapture in process mode

private void Button_Click(object sender, RoutedEventArgs e) { ScreenCaptureExt screenCaptureExt = new ScreenCaptureExt(); screenCaptureExt.SnapCanceled += ScreenCaptureExt_SnapCanceled; screenCaptureExt.SnapCompleted += ScreenCaptureExt_SnapCompleted; }
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