如何在 wpf 中截屏？
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how to screen capture in wpf?
提问by Tania Akter
I want to simple screen short on click.
我想在点击时简单地缩短屏幕。
I create a simple project from c# windows form.
我从 c# windows 窗体创建了一个简单的项目。
But I can not on wpf.
但是我不能上wpf。
Here is windows form code:
这是windows窗体代码：
using System.Drawing;
using System.Windows.Forms;
private void short_Click(object sender, EventArgs e)
{
System.Threading.Thread.Sleep(1000);
System.Windows.Forms.SendKeys.Send("{PRTSC}");
Image img = Clipboard.GetImage();
pictureBox1.Image = img;
img.Save("D:\myimg.jpg"); //Its save only one picture
}
But it save only one picture .
但它只保存一张图片。
Question for wpf:
wpf的问题：
1:How can I capture screen on click?
1：如何在点击时截屏？
2:How can I save multiple picture at a time?
2：如何一次保存多张图片？
Note:
笔记：
Just simple
很简单
Please help me anybody
请帮助我任何人
Please
请
回答by Artyom Shmarlovsky
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
[System.Runtime.InteropServices.DllImport("gdi32.dll")]
public static extern bool DeleteObject(IntPtr onj);
private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
{
Bitmap bitmap;
bitmap = new Bitmap((int) SystemParameters.PrimaryScreenWidth,(int) SystemParameters.PrimaryScreenHeight,PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(bitmap))
{
g.CopyFromScreen(0,0,0,0,bitmap.Size);
}
IntPtr handle = IntPtr.Zero;
try
{
handle = bitmap.GetHbitmap();
ImageControl.Source = Imaging.CreateBitmapSourceFromHBitmap(handle, IntPtr.Zero, Int32Rect.Empty,
BitmapSizeOptions.FromEmptyOptions());
bitmap.Save("D:\1.jpg"); //saving
}
catch (Exception)
{
}
finally
{
DeleteObject(handle);
}
}
}
XAML:
XAML：
<Window x:Class="WpfApplication1.MainWindow"
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:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:WpfApplication1"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition Height="Auto"></RowDefinition>
</Grid.RowDefinitions>
<Button Grid.Row="1" Height="10" Click="ButtonBase_OnClick"></Button>
<Image Grid.Row="0" x:Name="ImageControl"></Image>
</Grid>
回答by unkreativ
I use the following code to create a screenshot and show it on a wpf Image control. You should be able to save the bitmap as a jpeg or so
我使用以下代码创建屏幕截图并将其显示在 wpf Image 控件上。您应该能够将位图保存为 jpeg 左右
var bitmap = new Bitmap(Screen.AllScreens[SelectedScreen.Index].Bounds.Width, Screen.AllScreens[SelectedScreen.Index].Bounds.Height);
var graphics = Graphics.FromImage(bitmap);
graphics.CopyFromScreen(Screen.AllScreens[SelectedScreen.Index].Bounds.Left, Screen.AllScreens[SelectedScreen.Index].Bounds.Top, 0, 0, bitmap.Size);
this.Dispatcher.Invoke(() => this.PreviewImage.Source = this.ConvertBitmapToBitmapImage(bitmap));
