有什么办法没有它上传到服务器，以显示在客户端浏览器的形象？ [英] Is there any way to display image in client browser without uploading it to server?

问题描述

我写一个简单的书在ASP.NET MVC创建页面。用户可以通过填写标题，年份等。并选择封面图片创建的书。当用户preSS创建按钮形式向外发送的图像和数据，以所谓的创建，然后我将图片保存到磁盘和数据的数据库控制器动作。

I am writing a simple "Book" create page in ASP.NET MVC. User can create book by filling title,year etc.. and selecting a cover image. When user press "Create" button Form sends image and data to Controller action called "Create" then I save image to disk and data to database.

但我要当文件dialog.To用户选择图像这样做是为了展示形象，据我所知，我必须上传图片到服务器，然后在客户端显示browser.But如果用户上传影像后取消了创建操作，图像将保留在服务器的disk.So我该如何处理这些临时的图像或有什么办法没有上传到服务器，以显示在客户端浏览器的形象？

But I want to display image when user select image by file dialog.To do this As far as I know I must upload image to server then display in client browser.But if a user cancels the "Create" operation after uploading image, the image will remain in the server's disk.So How can I deal with these temp images or Is there any way to display image in client browser without upload to server?

推荐答案

由于安全原因，您将不能没有他们上传到服务器，以显示图像的用户。从文件系统中显示图像被认为是一个安全隐患。

Due to security reasons, you will not be able to display the images to the users without uploading them to the server. Displaying images from file system is considered a security risk.

编辑：删除未使用的图像，你可以创建一个线程来运行清理例程将从定期上传目录中删除它们。

To remove the unused images, you can create a thread to run a cleanup routine to which will delete them from the upload directory regularly.

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