将Base64编码字符串转换为文件

79

我有一个base64编码的字符串。

如何将这个base64编码的字符串写入文件?


首先,查看MSDN关于XmlTextreaderReadBase64方法的文档... http://msdn.microsoft.com/zh-cn/library/system.xml.xmltextreader.readbase64.aspx - undefined
3个回答

177

试试这个:

File.WriteAllBytes(@"c:\yourfile", Convert.FromBase64String(yourBase64String));

我想保存一个300kb的PDF文件并将其转换为base64字符串。虽然该文件已经成功保存,但无法正确打开。还有其他解决大文件的方法吗? - Naveen

2

-1

File.WriteAllBytes(@"c:\yourfile", Convert.FromBase64String(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感谢您为Stack Overflow社区做出的贡献。这可能是一个正确的答案,但如果您能提供代码的额外解释,那将对开发人员理解您的思路非常有帮助。对于不太熟悉语法或者正在努力理解概念的新手开发人员来说,这尤其有用。您是否可以编辑您的答案,以便为社区的利益提供更多细节? - Jeremy Caney

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