在Convert.FromBase64String中输入FileReader.readAsDataURL结果返回格式异常 [英] FileReader.readAsDataURL result returning format exception when entered in Convert.FromBase64String

问题描述

我正在使用以下内容将图像转换为base64编码的字符串.在使用javascript的客户端网站上:

I'm using the following to convert an image to a base64 encoded string. On the client website in javascript:

  var reader = new FileReader(); 
  reader.onloadend = function () {
                    data64 = reader.result;
                };

  reader.readAsDataURL(myFile);

现在，我将此数据传递给服务器，服务器将执行以下操作:

Now I pass this data to the server, which does the following:

 var data = Convert.FromBase64String(data64);

但是这会导致格式异常:

However this results in a format exception:

s的格式无效. s包含一个非base-64字符，两个以上的填充字符或这些填充字符中的非空白字符.

The format of s is invalid. s contains a non-base-64 character, more than two padding characters, or a non-white space-character among the padding characters.

我的输入文件是Windows 7上的示例图像之一->我的图片/示例图片/Tulips.jpeg

My input file is one of the sample images found on Windows 7 -> My Pictures/Sample Pictures/Tulips.jpeg

我如何尝试调试导致如此大结果输出的问题的原因?

How can I attempt to debug what is causing the problem for such a large result output?

推荐答案

好吧，我已经通过使用reader.readAsBinaryString来解决此问题，然后使用btoa对其进行了转换.

Okay, I have worked around this by using reader.readAsBinaryString instead and then converting this using btoa.

在Convert.FromBase64String

这篇关于在Convert.FromBase64String中输入FileReader.readAsDataURL结果返回格式异常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！