ASP. Before and after the call method

Several similar marker symbols in asp: <%=...%><%#...%><%%><%@%> Interpretation and usage

A: <% #%>: is executed when the bound control DataBind () method is executed for data binding

such as: <% # Container.DataItem ("tit")%>

<%=%>: Called during program execution to display background variable values

Such as:

*.aspx: <%= AAA%>

*.cs: Protected string aaa= "name";

<%%>: Inline code blocks can be embedded in the page file *.aspx or *.ascx file inside the background code

Such as:

<%

for (int i=0;i<100;i++)

{

Reaponse.write (i.ToString ());

}

%>

<%@%> is the front code import namespace on *.aspx page,

Such as:

<%@ importnamespace= "System.Data"%>

1.JavaScript accessing C # functions
2.JavaScript accessing C # variables
Access to existing variables in JavaScript in 3.c#

4. How to access JavaScript functions in C #
JavaScript access to C # functions
method One,

1, first set up a button, in the background will be called or processed content written in Button_Click;

2, write a JS function in the foreground, the content is document.getElementById ("Btn1"). Click ();

3, in the foreground or background call JS function, fire click event, equal access to the background C # function;
method Two,
1.
function declared as public or protected

2, in the HTML with <%=fucntion ()%> can call

method Three,

<script language= "JavaScript" > Function __doPostBack (eventtarget, eventargument) {var frontform = document. Form1; 　　Refers to runat=server form frontform.__eventtarget.value = Eventtarget; 　　Frontform.__eventargument.value = eventargument; Frontform.submit (); } </script> <input id= "Button1" type= "button" Name= "Button1" value= "button" onclick= "Javascript:__dopostback (' Button1 ', ') ' > 

Accessing C # Variables in JavaScript
Method One: 1, through the page hidden domain access <input id= "xx" type= "hidden"
runat= "Server" >
Method Two: 1, if the background defines the public STRING
N; The format of the variable referenced in the foreground JS is ' <%=n%> ' or ' +<%=n%>+ '

Method Three: 1, or you can register a script on the page after the server-side variable is assigned a value
"<script language= ' JavaScript ' >var
temp= "+ tmp +" </script> "
TMP is a background variable, and then JS can directly access the temp to get the value.

Existing variables for accessing JavaScript in C #
Method One: 1. The foreground uses the static text control to hide the field and writes the value of the JS variable to it;

2, backstage with request["id" to get the value;
Method Two: You can use a cookie or session
accessing JavaScript functions in C #

Method One: 1, page.registerstartupscript ("GGG", "<script>setvisible (1);</script>");

Method Two: Use the literal class, and then

ASP. Before and after the call method