uploadify 上传文件 文件名乱码解决方法

使用 uploadify 出现上传时文件名中文乱码，    

context.Response.ContentType = "text/plain";

context.Request.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");

context.Response.Charset = "utf-8";

后台处理返回处理结果出现中文乱码

context.Response.ContentType = "text/plain";

context.Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF-8");
context.Response.Charset = "utf-8";