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Issue related scope of a variable [Resolved]

Posted by Amatya under JavaScript on 2/17/2016 | Points: 10 | Views : 1034 | Status : [Member] | Replies : 6
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I have a variable in A.aspx page in function A(), say temp = 2; Now i want this variable in B.aspx page in function B(). I tried much, but iam unable to get the variable value. Do reply if anyone know . Thanks in Advance

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Posted by: A2H on: 2/17/2016 [Member] [MVP] Silver | Points: 50

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As mentioned by RajNilari you can use Querystring to pass values between pages and To read the values from Querystring and then assign it in your Javascript function. if that is the case then you can use the below code to get the values from querystring in Javascript. 

function getParameterByName(name) {

            name = name.replace(/[\[]/, "\\\[").replace(/[\]]/, "\\\]");

            var regexString = "[\\?&]" + name + "=([^&#]*)";

            var regex = new RegExp(regexString);

            var found = regex.exec(window.location.search);

            if (found == null)

                return "";

            else

                return decodeURIComponent(found[1].replace(/\+/g, " "));

        }


You can then use above code like below if you querystring value is 
Response.Redirect("B.aspx?temp=2");

 //get the Temp value

        var tempValue = getParameterByName("temp");



source url : http://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript?page=1&tab=votes#tab-top

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A2H
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Posted by: Rajnilari2015 on: 2/17/2016 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

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@Amatya Sir, since you tagged as Javascript, so pass that as a query parameter from A.aspx

e.g. 
window.location.href = "B.aspx?temp=2"


However if you are passing that variable from Code behind then please use (in A.aspx) 

Response.Redirect("B.aspx?temp=2");


and in page B.aspx accept the temp using QueryString . e.g. 

protected void Page_Load(object sender, EventArgs e)

    {

	string v = Request.QueryString["temp"];

	if (v != null)

	{	    

	    Response.Write(v);

	}

    }


Hope that helps

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RNA Team

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Posted by: Amatya on: 2/17/2016 [Member] Silver | Points: 25

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I want in B.aspx not in B.aspx.cs page.

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mail Id ' adityagupta200@gmail.com
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Posted by: Amatya on: 2/17/2016 [Member] Silver | Points: 25

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 function SelectFeature()
        {
         
            
            var layerSelect = document.getElementById("layerSelect");
            var resultSelect = document.getElementById("resultSelect");
            
            reqParams = "COMMAND=<%=Command.GETSELECTIONXML%>";
            reqParams += "&SESSION=" + encodeURIComponent(session);
            reqParams += "&MAPNAME=" + encodeURIComponent(mapName);
            reqParams += "&LAYERNAME=" + encodeURIComponent(layerSelect.value);
            reqParams += "&IDLIST=" + results[resultSelect.value].idList.toJSONString();

            if (msie)
                reqHandler = new ActiveXObject("Microsoft.XMLHTTP");
            else
                reqHandler = new XMLHttpRequest();

            reqHandler.open("POST", "querycontroller.aspx", false);
            reqHandler.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
            reqHandler.send(reqParams);
            selectionXml = reqHandler.responseText;
            parent.parent.mapFrame.SetSelectionXML(selectionXml);
            //Response.Redirect("MapViewer.aspx?temp=2");
        }


This is my javascript function where i have to declare temp variable. This is my A.aspx page .

Now,

function OpenQueryBuilder() {
           debugger
           //
           //tempZ = 2;
          //tempVar = 1;
           ExecuteCmd(14);

           if (checkForMapFrame() == false) return;
           if (MGFrame.contentWindow != null && MGFrame.contentWindow.mapFrame != null) {
               MGFrame.contentWindow.GetTaskFrame().frames[1].location.href = "query/querymain.aspx?SESSION=" + MGFrame.contentWindow.mapFrame.GetSessionId() + "&MAPNAME=" + MGFrame.contentWindow.mapFrame.GetMapName();
               //MGFrame.contentWindow.GetTaskFrame().frames[1].bgColor = "White";
           }
           else {
               MGFrame.GetTaskFrame().frames[1].location.href = "query/querymain.aspx?SESSION=" + MGFrame.mapFrame.GetSessionId() + "&MAPNAME=" + MGFrame.mapFrame.GetMapName();
           }
           return;
       }


In the above function, which is in my say b.aspx i have to get the value of passed variable value




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mail Id ' adityagupta200@gmail.com
Thanks

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Posted by: Rajnilari2015 on: 2/17/2016 [Member] [Microsoft_MVP] [MVP] Platinum | Points: 25

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OK. So in that case get the URL and parse that to get the key (which is temp) and the value (temp value).
Here is an example 

var uRL= window.location.search;
uRL= uRL.split("?")[1].split("=")[1];


You can also refer this site ( http://dotnetprof.blogspot.in/2012/11/get-querystring-values-using-javascript.html ) which implements the full code.

Hope this helps.


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Thanks & Regards,
RNA Team

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Posted by: Amatya on: 2/17/2016 [Member] Silver | Points: 25

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I didnt got dear.. Still struggling

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mail Id ' adityagupta200@gmail.com
Thanks

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