What are the problems of calling each other between C # code and function

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One of the problems of calling each other between C # code and # function

Q: how do I access the C # function in #?

A:

# execute the function in the C# code in the function:

Method 1. First, set up a button to write the called or processed content to button_click in the background.

2. Write a js function in the foreground with the content document.getElementById ("btn1"). Click ()

3. Call the js function in the foreground or background to fire the click event, which is equal to visiting the background c # function

Method 2: 1. The function is declared as public

Background code (you can also change public to protected)

Public string ss () {return ("a");}

2. You can call <% = fucntion ()% > in html

Foreground script

< script language=# > var a = "<% = ss ()% >"; alert (a); < / script >

Method 3: 1.

< script language= "#" >