?
Solved

How to pass javascript parameter to C# fucntion parameter

Posted on 2010-09-09
8
Medium Priority
?
1,014 Views
Last Modified: 2012-05-10
Hii Dear
I have problem to call c# function from javascript with parameter which is pass in javascript function.

Its work fine if there is no parameter. But I want to pass javascript parameter value to C# function.

I have try following way.

<script type="text/javascript">    
function EventTrack(pIntEventID,pIntCategoryID,pLngMemberID,pStrAttributeA,pStrAttributeB,pStrAttributeC,pStrAttributeD,pStrAttributeE)
        {  
          var  lIntEventID=pIntEventID;            
          var  lIntCategoryID = pIntCategoryID;
           var lLngMemberID = pLngMemberID;
           var lStrAttributeA = pStrAttributeA;
           var lStrAttributeB = pStrAttributeB;
           var lStrAttributeC = pStrAttributeC;
           var lStrAttributeD = pStrAttributeD;
           var lStrAttributeE = pStrAttributeE;            
            //This is the function in C# page code
            <% trackEvent(%> lIntEventID <%=,%> lIntCategoryID <%=,%> lLngMemberID <%=,%> lStrAttributeA <%=,%> lStrAttributeB <%=,%> lStrAttributeC <%=,%> lStrAttributeD <%=,%> lStrAttributeE <%=);%>
           
            return true;
        }
    </script>

Thanks in advance
0
Comment
Question by:avacaralife
  • 4
  • 2
7 Comments
 
LVL 31

Expert Comment

by:MlandaT
ID: 33636235
I am doubtul about your approach here. You need ot realise that your Javascript code executes at the client side, and the c# code on the server side. You cannot pass 'parameters' in the manner you are attempting.

You need to perhaps create a number of textboxes or hidden input controls on the form and set the values of those textboxes, then initiate a postback which causes the necessary processin to be done on the server side.
0
 
LVL 2

Expert Comment

by:SandyAgo
ID: 33636276
Hi avacaralife,

Have you seen anything about PageMethods before? I was looking to call C# functions using javascript not too long ago and this is the best solution I could find.

Hava a look at these for some examples and info:
http://aspalliance.com/1922_PageMethods_In_ASPNET_AJAX.2
http://www.singingeels.com/Articles/Using_Page_Methods_in_ASPNET_AJAX.aspx
0
 

Author Comment

by:avacaralife
ID: 33636283
Thanks MlandaT,
Ok I will try the way suggest.
But if possible then I need to pass from java script.
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
LVL 31

Accepted Solution

by:
MlandaT earned 2000 total points
ID: 33636447
In aspx page you define a hidden input control (you would have one for each of the values you want to pass back):

<input type="hidden" name="htxtEventID" id="htxtEventID" value="" runat=server>
<!--We will use the txtFlag textbox to determine when we should execute the C# function-->
<asp:Textbox runat="server" ID="txtFlag" Width="0px" Text=""></asp:Textbox>

In the javascript you set the value of the input control and initiate a postback:

function EventTrack(pIntEventID,pIntCategoryID,pLngMemberID,pStrAttributeA,pStrAttributeB,pStrAttributeC,pStrAttributeD,pStrAttributeE)
        {  
                var  lIntEventID=pIntEventID;            
                //the rest of your variable declarations here

                document.getElementById("htxtEventID").value = lIntEventID;
                //set the values for the corresponding hidden input for each of your variables here

//by setting a value in the textbox txtFlag, we cause a TextChanged event to fire on the server. In this event we will call our c# function
                document.getElementById("<%#txtFlag.ClientID%>").value = "CallFunction";
                document.forms[0].submit();
        }

And in the txtFlag_TextChanged event handler in the .aspx.cs file you can check:

protected void txtFlag_TextChanged(object sender, EventArgs e)
{
      If (txtFlag.Text == "CallFunction") {

            //here call your C# function, taking values from the javascript... expand for all the variables you need.
            myCFunction(htxtEventID.Text);

      };
}


0
 
LVL 31

Expert Comment

by:MlandaT
ID: 33636471
SandyAgo's approach is also interesting.. I actually wasnt aware you could do that myself.
0
 

Author Comment

by:avacaralife
ID: 33636490
Thanks MlandaT,

Ok I will try this and reply you.
0
 
LVL 31

Expert Comment

by:MlandaT
ID: 33896067
Solutions were provided but no feedback was eventually given as to whether they helped find a working solution
0

Featured Post

Get expert help—faster!

Need expert help—fast? Use the Help Bell for personalized assistance getting answers to your important questions.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
How can you see what you are working on when you want to see it while you to save a copy? Add a "Save As" icon to the Quick Access Toolbar, or QAT. That way, when you save a copy of a query, form, report, or other object you are modifying, you…
Stellar Phoenix SQL Database Repair software easily fixes the suspect mode issue of SQL Server database. It is a simple process to bring the database from suspect mode to normal mode. Check out the video and fix the SQL database suspect mode problem.
Suggested Courses
Course of the Month9 days, 15 hours left to enroll

569 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question