how can I go to aspx.cs only if js return true?

Question

I did like this in js (i need to check if the credit card details are correct). so I want instead of the return true to send it to aspx.cs

if (submit != "") {

            if (card != "" && validity != "" && digits != "") {  

                if (card.length == 16) {  

                    for (var i = 0; i < card.length; i++) {  
                        if (card[i] >= 0 && card[i] <= 9) {  

                            for (var i = 0; i < validity.length; i++) {  
                                if (validity[i] >= 0 && validity[i] <= 9) {  

                                    for (var i = 0; i < digits.length; i++) {  
                                        if (digits[i] >= 0 && digits[i] <= 9) {  

                                            if (digits.length == 3) {  
                                                return true;  
                                            }  
                                        }  
                                    }  
                                }  
                            }  
                        }  
                    }  
                }  
            }  
        }

Answer 1

Hi @shilat shay ,

so I want instead of the return true to send it to aspx.cs

Based on your description, it looks like you want to send this result to the backend in WebForms project using javascript, right? If this is the case, you could use the ajax request with jquery.js to implement this requirement, like this:

And the WebMethod in asp.cs:

   [WebMethod]  
   public static string MethodName(string name)  
   {  
       return "Hello " + name;  
   }  

In addition, you need to set RedirectMode.Off in RouteConfig.cs. Something like this:

If I misunderstood anything on this question, please let me know.

Best regards,
Xudong Peng

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