Insert Logging In Functions ASP.NET

Question

I have an .ascx containing javascript and div elements.

I want insert a log statement inside a function for troubleshooting.

May I know how can I achieve it?

Below is my code snippet:

function SaveGroupCheck() {
    var isValid = true;
    var haveError = false;

    var schedule = document.getElementById("<%=ddlExecutionSchedule.ClientID%>").value;

    //INSERT LOGGING HERE - Value of 'schedule'//

    if (schedule == "Weekly")
    {
        var xday = document.getElementById("<%=chkSelectDay.ClientID%>");
        var checkbox = xday.getElementsByTagName("input");
        var counter = 0;
        for (var i = 0; i < checkbox.length; i++) {
            if (checkbox[i].checked) {
                counter++;
            }
        }

    //INSERT LOGGING HERE - Value of 'counter'//

        if (counter < 1) {
            $("#chkSelectDay").addClass('errorbox');
            $("#divSelectDay").addClass('has-error has-feedback');
            $("#lblSelectDay").addClass('has-error has-feedback');
        haveError = true;
        }
        else {
            $("#chkSelectDay").removeClass('errorbox');
            $("#divSelectDay").removeClass('has-error has-feedback');
            $("#lblSelectDay").removeClass('has-error has-feedback');
        }
    }

     //INSERT LOGGING HERE - Value of 'haveError'//

Below is a log which I attempted but failed. I will use a try-catch if the error info needs to be provided.

var logFileName = ConfigurationManager.AppSettings["logpath"] + "Debug_" + DateTime.Now.ToString("ddMMyyyy_hhmmss") + ".log";
var itemPerPage = document.getElementById("<%=txtItemsPerPage.ClientID%>").value;
Log(DateTime.Now.ToString("ddMMyyyy_hhmmss") + " - itemPerPage = " + itemPerPage);

*logpath configured in app.config.

Thank you for your time.

Answer 1

To log any javascript variables you can use :

console.log("Hello I'm the variable value");

and open chrome console to see the value.

If you want to send variable value to server you must go to ajax call by calling server method for logging.

I hope that I understood your question.