工作需要筆記

if(!string.IsNullOrEmpty(Session["emp_num"] as string))
{
//The code
}
http://stackoverflow.com/questions/7172910/checking-session-if-empty-or-not

Encode
public static string Base64Encode(string plainText)
{
var plainTextBytes =System.Text.Encoding.UTF8.GetBytes(plainText);
returnSystem.Convert.ToBase64String(plainTextBytes);
}

Page.RegisterClientScriptBlock("AlertMsg", "<script language=\'javascript\'>alert(\'" + msg + "\')</script>");
 
http://www.dotblogs.com.tw/mis0800/archive/2014/03/15/144401.aspx?fid=72169

string encoded = System.Web.HttpUtility.UrlEncode(input);
string decoded =  System.Web.HttpUtility.UrlDecode(encoded);

enum Colors { None=0, Red = 1, Green = 2, Blue = 4 };
string[] colorStrings = { "0", "2", "8", "blue", "Blue", "Yellow", "Red, Green" };

http://stackoverflow.com/questions/19098797/fastest-way-to-flatten-un-flatten-nested-json-objects/19101235#19101235
 
http://jsfiddle.net/3rmstg5p/7/
 

注意jQuery內傳的參數名稱和WebService的參數名稱要一致！
 
The Other Reason

Not using JSON.stringify to pass parameter value.
If you not supply type in jQuery, it will use GET method which is not accept in your webservice configuration. Add  ( type : "POST ) in your jQuery code to use POST method.
You are actually request data from different domain. Cross Domain Request (CORS)which is not allowed. Please read here
Content type not supply or not correct. Use "application/json; charset=utf-8"
DataType not not supply or not correct. Use json or jsonp

void Application_BeginRequest(object sender, EventArgs e)
{
HttpApplication app = sender as HttpApplication;
if(app.Request.Path.IndexOf("FriendlyPage.html") > 0)
{
app.Context.RewritePath("/UnfriendlyPage.aspx?SomeQuery=12345");
}
}
http://www.codeproject.com/Articles/33341/URL-Rewriting-using-ASP-NET-for-SEO

Response.Redirect("http://www.flashwolves.com" + HttpContext.Current.Request.Url.PathAndQuery);
 
http://stackoverflow.com/questions/593709/how-to-get-the-url-of-the-current-page-in-c-sharp

DataSet 廠商專頁ds = DBstatic.廠商專頁ds;
DataRow[] updateRow = 廠商專頁ds.Tables[0].Select("專頁編號 = '" + 專頁編號 + "'");
updateRow[0]["欄位名稱"] = 欄位變數;
DBstatic.廠商專頁ds = 廠商專頁ds;