JS calls C # background functions to obtain background parameters (html obtains C # parameters)

C # It is easy and convenient to interact with the background by having its own background controls. However, sometimes html controls have to be used. how to interact with the background is a problem. For example, html obtains background parameters and uploads them to PHP for database operations. The following is a brief introduction to JS calling background functions to obtain parameters to be uploaded to the foreground.

 

C # background code (Default. aspx. cs ):

1 public string getParameter () 2 {3 string parameter = "this is the parameter to be passed to the foreground"; 4 return parameter; 5}

 

Part of Default. aspx code:

Note that this part of code should be written in the aspx page and cannot be placed in a separate JS file, because the '<% = getParameter () %>' method must be recognized in aspx.

<Script type = "text/javascript"> function change (){
Var f = '<% = getParameter () %>'; alert (f);} window. onload = change; </script>

Running result: