下载文件 文件名 乱码的问题.

之前看到博友们一些文章解决asp.net的下载文件名的乱码,但是貌似针对其他浏览器比如Firefox的中文还是有乱码,空格出现+号(这时候IE,Chrome没问题)

刚才试了试,用这个方法可以搞定了IE,Chrome,Firefox.其他没测试,先贴上代码:

public class UrlEncoder 
    { 
        /// <summary> 
        /// Encodes non-US-ASCII characters in a string. 
        /// </summary> 
        /// <param name="s"></param> 
        /// <returns></returns> 
        public static string ToHexString(string s) 
        { 
            char[] chars = s.ToCharArray(); 
            StringBuilder builder = new StringBuilder(); 
            for (int index = 0; index < chars.Length; index++) 
            { 
                bool needToEncode = NeedToEncode(chars[index]); 
                if (needToEncode) 
                { 
                    string encodedString = ToHexString(chars[index]); 
                    builder.Append(encodedString); 
                } 
                else 
                { 
                    builder.Append(chars[index]); 
                } 
            } 
            return builder.ToString(); 
        } 
        /// <summary> 
        /// Determines if the character needs to be encoded. 
        /// </summary> 
        /// <param name="chr"></param> 
        /// <returns></returns> 
        private static bool NeedToEncode(char chr) 
        { 
            string reservedChars = "$-_.+!*'(),@=&"; 
            if (chr > 127) 
                return true; 
            if (char.IsLetterOrDigit(chr) || reservedChars.IndexOf(chr) >= 0) 
                return false; 
            return true; 
        } 
        /// <summary> 
        /// Encodes a non-US-ASCII character. 
        /// </summary> 
        /// <param name="chr"></param> 
        /// <returns></returns> 
        private static string ToHexString(char chr) 
        { 
            UTF8Encoding utf8 = new UTF8Encoding(); 
            byte[] encodedBytes = utf8.GetBytes(chr.ToString()); 
            StringBuilder builder = new StringBuilder(); 
            for (int index = 0; index < encodedBytes.Length; index++) 
            { 
                builder.AppendFormat("%{0}", Convert.ToString(encodedBytes[index], 16)); 
            } 
            return builder.ToString(); 
        } 
    }

然后在下载下面中:

response.ContentType = "application/octet-stream"; 
response.HeaderEncoding = Encoding.UTF8; 
string encodefileName = UrlEncoder.ToHexString(fileName); 
string userAgent = request.UserAgent.ToUpper(); 
string fileNameHead = null;
if (userAgent.IndexOf("FIREFOX") > 0) 
    fileNameHead = string.Format("attachment;filename*=utf8''{0}", encodefileName); 
else 
    fileNameHead = string.Format("attachment;filename={0}", encodefileName);
response.AddHeader("Content-Disposition", fileNameHead); 

就成了.