Remove characters from request.querystring

Question

I have some code which gets the DrawingId from an url like the one below:

/Queue/Queue.aspx?Mode=Autosearch&DrawingID=188320"

My issue is after running another part of the program, that url becomes this:

/Queue/Queue.aspx?Mode=Autosearch&DrawingID=188320?DrawingRequestId=376333&doQuerySearch=true&start=&end=&Ind=&Model=&status=Open&manager=&source=&assignee=&title=&features=&parts=&pas=&customer=&number=&project=&startIndex=1&endIndex=10&pageSize=10&total=193&date=Extended&qsEnd=

Is there a good way remove everything after 188320? Also is there a good way to extract the DrawingRequestId of 376333?

Here is the code for DrawingID:

public string DrawingId
{
  get
  {
   if (Request.QueryString["DrawingID"] != "" && Request.QueryString["DrawingID"] != null)
   {
     return Request.QueryString["DrawingID"];
   }
  return null;
  }
}

This part won't run because the DrawingId becomes incorrect:

List<string> featureCodes = drawingBusiness.GetFeatureCodesByDrawingId(long.Parse(DrawingId));

This code doesn't work because instead of DrawingId just being 188320,

it becomes 188320?DrawingRequestId=376333

Here is the javascript where I assume the problem is starting:

function CloseAndRefresh() {
        var parentUrl = window.top.location.href;
        if (parentUrl.indexOf("Queue/Queue.aspx") != -1) {

            if (window.location.search === "") {
                window.location.href = window.top.location
            }
            else {
                window.top.location.href = window.top.location + window.location.search;
            }
        }
        else {
            if (window.location.search === "") {
                window.location.href = window.top.location
            }
            else {
                window.top.location.href = window.top.location + window.location.search;
            }
        }
    }

Answer 1

To remove all the code appended to your url you can do something like:

var longURL = "/Queue/Queue.aspx?Mode=Autosearch&DrawingID=188320?DrawingRequestId=376333&doQuerySearch=true&start=&end=&Ind=&Model=&status=Open&manager=&source=&assignee=&title=&features=&parts=&pas=&customer=&number=&project=&startIndex=1&endIndex=10&pageSize=10&total=193&date=Extended&qsEnd=";

var shortURL = longURL.split('?').slice(0, -1).join('?');

console.log(shortURL) // "/Queue/Queue.aspx?Mode=Autosearch&DrawingID=188320"

To extract the DrawingRequestId you can do something like:

var longURL = "/Queue/Queue.aspx?Mode=Autosearch&DrawingID=188320?DrawingRequestId=376333&doQuerySearch=true&start=&end=&Ind=&Model=&status=Open&manager=&source=&assignee=&title=&features=&parts=&pas=&customer=&number=&project=&startIndex=1&endIndex=10&pageSize=10&total=193&date=Extended&qsEnd=";

var drawingRequestId = parseInt(longURL.substr(longURL.indexOf('DrawingRequestId=')+17, 6));

console.log(drawingRequestId) // 376333