C # mutual calls between code and JavaScript Functions (1)

We use the Q & A method to answer the mutual calls between C # and JavaScript Functions:
1. How to access the C # function in JavaScript?
2. How to access the C # variable in JavaScript?
3. How to access existing JavaScript variables in C?
4. How to access JavaScript Functions in C?

Question 1: how to access the C # function in JavaScript?

The answer is as follows:

Execute functions in C # code in javaScript Functions:

Method 1:

1. Create a button to write the called or processed content to button_click in the background;
2. Write a js function on the front-end with the content document. getElementById ("btn1"). click ();
3. Call js functions on the frontend or backend to stimulate the click event, which is equivalent to accessing the c # function in the background;

Method 2:

1. function declaration is public

Background code (change public to protected)

The following is a reference clip: Public string ss () { Return (""); }

2. In html, you can call the foreground script

The following is a reference clip:

Method 3:

The following is a reference clip: Onclick = "javascript :__ doPostBack ('button1','') ">

Method 4:

The following is a reference clip: Script language = "javascript"> Function SubmitKeyClick () { If (event. keyCode = 13) { Event. cancelBubble = true; Event. returnValue = false; Document. all. FunName. value = "Name of the function you want to call "; Document. form [0]. submit (); } } <〈! -- Used to store the function you want to call --> --〉

In. CS, there are:

The following is a reference clip: Public Page_OnLoad () { If (! Page. IsPost ()) { String strFunName = Request. Form ["FunName"]! = Null? Request. Form ["FunName"]: ""; // Determine which function to call based on the value returned Switch (strFunName) { Case "enter ()": Enter (); // call this function Break; Case "Others ": // Call other functions Break; Default: // Call the default Function Break; } } } Public void enter () { //...... For example, calculating a value }