C# 後端檔案下載

private void DownFile(string filePath, string fileName)
{

        string sExtension = Path.GetExtension(filePath);

        string sContentType = GetContentType(sExtension);

        byte[] ary = null;

        FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);

        BinaryReader br = new BinaryReader(fs);

        int len = System.Convert.ToInt32(fs.Length);

        ary = br.ReadBytes(len);

        Response.AddHeader("Content-Disposition", "inline; filename=" + HttpUtility.UrlEncode(fileName, Encoding.UTF8));

        Response.ContentType = sContentType;

        Response.ContentEncoding = Encoding.Unicode;

        Response.AddHeader("Content-Length", ary.Length.ToString());

        Response.BinaryWrite(ary);

        fs.Close();

}

    private string GetContentType(string sExtName)

    {

        string sTypeName = "";

        switch (sExtName.Replace(".", "").Trim().ToLower())

        {

            case "ppt":

                sTypeName = "application/mspowerpoint";

                break;

            case "doc":

                sTypeName = "application/msword";

                break;

            case "docx":

                sTypeName = "application/msword";

                break;

            case "xls":

                sTypeName = "application/vnd.ms-excel";

                break;

            case "xlc":

                sTypeName = "application/vnd.ms-excel";

                break;

            case "xll":

                sTypeName = "application/vnd.ms-excel";

                break;

            case "xlm":

                sTypeName = "application/vnd.ms-excel";

                break;

            case "xlw":

                sTypeName = "application/vnd.ms-excel";

                break;

            case "pdf":

                sTypeName = "application/pdf";

                break;

            case "zip":

                sTypeName = "application/zip";

                break;

            case "jpg":

                sTypeName = "image/jpeg";

                break;

            case "png":

                sTypeName = "image/png";

                break;

            case "gif":

                sTypeName = "image/gif";

                break;

            case "bmp":

                sTypeName = "image/bmp";

                break;

            case "txt":

                sTypeName = "text/plain";

                break;

            default:

                sTypeName = "application/octet-stream";

                break;

        }

        return sTypeName;

}

Javascript 以 post 帶入參數並傳值

function post_to_url(params) {

            // The rest of this code assumes you are not using a library.
            // It can be made less wordy if you use one.
            var form = document.getElementById("form1");

            var hiddenField = document.createElement("input");
            hiddenField.setAttribute("type", "hidden");
            hiddenField.setAttribute("name", "login");
            hiddenField.setAttribute("value", params);

            form.appendChild(hiddenField);

            form.method = "post";
            form.submit();

        }

C# 編碼 & 解碼

        //編碼
        private string Encrypt(string text)
        {
            byte[] content = Encoding.UTF8.GetBytes(text);

            string keyStr = "webgenie";     //key
            byte[] key = Encoding.UTF8.GetBytes(keyStr);
            MD5CryptoServiceProvider provider_MD5 = new MD5CryptoServiceProvider();
            byte[] byte_pwdMD5 = provider_MD5.ComputeHash(key); //hash後使得長度固定
            RijndaelManaged provider_AES = new RijndaelManaged();
            ICryptoTransform encrypt_AES = provider_AES.CreateEncryptor(byte_pwdMD5, byte_pwdMD5);

            byte[] output = encrypt_AES.TransformFinalBlock(content, 0, content.Length);
            string encryptStr = Convert.ToBase64String(output);
            return encryptStr;
        }

        //解碼
        private string Decrypt(string text)
        {
            string encryptStr = text;
            byte[] Content = Convert.FromBase64String(encryptStr);
            string keyStr = "webgenie";
            byte[] key = Encoding.UTF8.GetBytes(keyStr);
            MD5CryptoServiceProvider provider_MD5 = new MD5CryptoServiceProvider();
            byte[] byte_pwdMD5 = provider_MD5.ComputeHash(key);
            RijndaelManaged provider_AES = new RijndaelManaged();
            ICryptoTransform decrypt_AES = provider_AES.CreateDecryptor(byte_pwdMD5, byte_pwdMD5);
            byte[] decrypt = decrypt_AES.TransformFinalBlock(Content, 0, Content.Length);
            string decryptStr = Encoding.UTF8.GetString(decrypt);
            return decryptStr;
        }

C# 判斷是否為手機瀏覽

string u = Request.ServerVariables["HTTP_USER_AGENT"];
        Regex b = new Regex(@"android.+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino", RegexOptions.IgnoreCase | RegexOptions.Multiline);
        Regex v = new Regex(@"1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(di|rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-", RegexOptions.IgnoreCase | RegexOptions.Multiline);

        //手機瀏覽本頁
        if ((b.IsMatch(u) || v.IsMatch(u.Substring(0, 4))))
        {
            Response.Redirect("~/Mobile/Default.aspx");
        }

FB 分享帶參數

//fb分享
    function FBShare() {

        var url = encodeURIComponent('<%= Request.Url.AbsoluteUri %>');
        alert(url);
        window.open("http://www.facebook.com/sharer.php?u=" + url + "&t=" + (new Date()).getTime(), "", "width=600,height=300");

    }

<a href="#" onclick="FBShare();"><img src="images/fb.png" alt="fb"></a>

Javascript 取得 get 值

<script type="text/javascript">
var url=window.location.toString();
var str="";
var str_value="";
if(url.indexOf("?")!=-1){
    var ary=url.split("?")[1].split("&");
    for(var i in ary){
        str=ary[i].split("=")[0];
     
        //tag為b
        if (str == "b") {
            str_value = decodeURI(ary[i].split("=")[1]);
        }
    }
}
alert(str_value);
</script>