In C#, you should assign the returned value from JavaScript to an array

I am in need of assistance with a javascript function that returns an array.

My main queries are:

  • (a) How can I call the Javascript function during OnInit or Onload?
  • (b) The javascript function outputs an array, and I would like to store it within an array in my c# code.

Your suggestions would be greatly appreciated.

Thank you.

Update1: Below is an example of the Javascript function:

function RenderUrl() 
{
    var url = "http://myurl.com/mypage?Id=420&Width=30"; //this is a sample url.

    var qsBegin = url.indexOf("?");
    var qsPattern = new RegExp("[?&]([^=]*)=([^&]*)", "ig");
    var match = qsPattern.exec(url);
    var params = new Array();

    while (match != null) 
        {
            var matchID = match[1];
                if ( matchID.charAt(0) == "&" ) 
            {
                    matchID = matchID.substr(1);
                }

                if ( params[match[1]] != null && !(params[match[1]] instanceof Array) ) 
            {
                    var subArray = new Array();
                    subArray.push(params[match[1]]);
                    subArray.push(unescape(match[2]));
                    params[match[1]] = subArray;
                }
            else if ( params[match[1]] != null && params[match[1]] instanceof Array ) 
            {
                    params[match[1]].push(unescape(match[2]));
            }
            else 
            {
                params[match[1]]=unescape(match[2]);
                }
            match = qsPattern.exec(url);
        }
    return params;
}

Update 2: Here is the current status of my c# code (not producing desired results yet, but still under review)

 private void ParseUrl(string Url)
{
    int WhereToBegin = Url.IndexOf("?");
    string pattern = @"[?&]([^=]*)=([^&]*)";
    Regex rgx = new Regex(pattern, RegexOptions.IgnoreCase);
    MatchCollection matches = rgx.Matches(Url);
    while (matches != null)
    {
        string matchID = matches[0].ToString();
        if (matchID.Substring(0, 1) == "&")
        {
            matchID = matchID.Substring(1);
        }

    //Code for adding elements to the new PARAMS array here (work in progress)
      ..
      ..    
    //End of array construction.

        matches = rgx.Matches(Url);
    }
    //Once everything is working properly, the array will be returned.
}

Answer №1

The code snippet you shared focuses on parsing parameters from the page's URL using JavaScript. However, in ASP.NET, you can easily retrieve this information directly from C# by accessing Request.QueryString or through other methods.

Answer №2

As far as I am aware, it is not possible to execute client side code directly from server side code.

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