图像转换成数据：图像/ PNG;对于网页disaplay的base64 [英] Converting image into data:image/png;base64 for web page disaplay

问题描述

如果人访问 jQuery的，文件的上传演示页并会尽量上传图片，然后会看JSON响应，他会注意到上传图像的preVIEW的格式返回：

If one visits jQuery-File-Upload Demo page and will try to upload an image, and then will look at the JSON response, he would notice that a preview of an uploaded image is returned in a format:

"thumbnail_url":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFAAAABQCAI...

据我了解，一个图像是越来越转换成字符串并发送回客户端。

As far as I understand, an images is getting transformed into string and sent back to the client.

如何能做到在C＃教学贯彻ASP.NET后端为同一演示？

How can I do it in C# to impelement ASP.NET back end for the same demo?

推荐答案

我记得以前看过一个问题的答案回，而由非常能干competent_tech和思考：我从来不知道你能做到这一点！

I remember reading an answer to a question a while back by the very competent competent_tech and thinking "I never knew you could do that!"

在这个问题的答案就是一个例子了解如何设置一个ASP.Net图像的src要以base64恩您在上面看到codeD数据。

In that answer is an example about how to set the src of an ASP.Net image to be the base64 encoded data you see above.

它有效地归结为一个设置ASP的src：Image控件如下：

It effectively boils down to setting the src of an ASP:Image control as follows:

imgCtrl.Src = @"data:image/gif;base64," + Convert.ToBase64String(File.ReadAllBytes(Server.MapPath(@"/images/your_image.gif")));

根据记得在图像上更改内容类型！

Remember to change the content type depending on the image!

这篇关于图像转换成数据：图像/ PNG;对于网页disaplay的base64的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！