如何将图标(位图)转换为ImageSource? [英] How to convert icon (Bitmap) to ImageSource?

问题描述

我的wpf应用程序中有一个按钮和一个名为image1的图像.我想从位置或文件路径的文件图标添加image1的图像源.这是我的代码:

I have a button and an image named as image1 in my wpf app. I want add image source of the image1 from a file icon of a location or file path. Here is my code:

using System.Windows;
using System.Windows.Media.Imaging;
using System.IO;
using System.Drawing;

namespace WpfApplication2
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void Button_Click_1(object sender, RoutedEventArgs e)
        {
            Icon ico = System.Drawing.Icon.ExtractAssociatedIcon(@"C:\WINDOWS\system32\notepad.exe");
            image1.Source = ico.ToBitmap();
        }
    }
}

错误提示

无法将类型'System.Drawing.Bitmap'隐式转换为'System.Windows.Media.ImageSource'

Cannot implicitly convert type 'System.Drawing.Bitmap' to 'System.Windows.Media.ImageSource'

如何解决这个问题?

推荐答案

Farhan Anam建议的解决方案可以使用，但并不理想:从文件中加载图标，将其转换为位图，保存到流中并重新加载从流中.效率很低.

The solution suggested by Farhan Anam will work, but it's not ideal: the icon is loaded from a file, converted to a bitmap, saved to a stream and reloaded from the stream. That's quite inefficient.

另一种方法是使用 System.Windows.Interop.Imaging 类及其

Another approach is to use the System.Windows.Interop.Imaging class and its CreateBitmapSourceFromHIcon method:

private ImageSource IconToImageSource(System.Drawing.Icon icon)
{
    return Imaging.CreateBitmapSourceFromHIcon(
        icon.Handle,
        new Int32Rect(0, 0, icon.Width, icon.Height),
        BitmapSizeOptions.FromEmptyOptions());
}

private void Button_Click_1(object sender, RoutedEventArgs e)
{
    using (var ico = System.Drawing.Icon.ExtractAssociatedIcon(@"C:\WINDOWS\system32\notepad.exe"))
    {
        image1.Source = IconToImageSource(ico);
    }
}

请注意在转换后将 using 块用于处置原始图标.不这样做会导致手柄泄漏.

Note the using block to dispose the original icon after you converted it. Not doing this will cause handle leaks.

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