首页 \ 问答 \ 为什么在Xamarin Media插件中使用ImageSource.FromStream而不是FromFile?(Why use ImageSource.FromStream instead of FromFile in Xamarin Media plugin?)

为什么在Xamarin Media插件中使用ImageSource.FromStream而不是FromFile?(Why use ImageSource.FromStream instead of FromFile in Xamarin Media plugin?)

我正在使用James Montemagno的Xamarin Media插件( https://github.com/jamesmontemagno/MediaPlugin ),他的使用示例显示了从捕获的照片以这种方式更新的图像:

        targetImage.Source = ImageSource.FromStream(() =>
        {
            var stream = file.GetStream();
            file.Dispose();
            return stream;
        });

这似乎同样有效:

        targetImage.Source = ImageSource.FromFile(file.Path);

但是我觉得詹姆斯的榜样必须展示出更好的方式,但我无法理解为什么 - 也许在一个平台或另一个平台上有些微妙的东西。 任何人都可以告诉我为什么Xamarin ImageSource应该单向设置?


I am using James Montemagno's Xamarin Media Plugin (https://github.com/jamesmontemagno/MediaPlugin) and his usage example shows an image being updated in this way from the captured photo:

        targetImage.Source = ImageSource.FromStream(() =>
        {
            var stream = file.GetStream();
            file.Dispose();
            return stream;
        });

This seems to work just as well:

        targetImage.Source = ImageSource.FromFile(file.Path);

However I feel that James' example must be showing a better way but I can't figure why -- maybe some subtle thing on one platform or another. Can anyone tell me why the Xamarin ImageSource should be set one way versus another?


原文:https://stackoverflow.com/questions/41663571
更新时间:2024-05-02 18:05

最满意答案

事实证明,由于我的nginx配置中的错误页面定义,我收到了这个奇怪的会话错误消息。

通过更正我的实体中的一些错误来解决未找到实体的问题。 Symfony开发人员栏为我提供了足够的信息来跟踪问题。


It turns out I was getting this strange session error message because of an error page definition in my nginx config.

The entity not found issue was resolved by correcting some errors in my entities. The Symfony developer bar provided me with enough information to track the issue down.

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