Solved

javascript call

Posted on 2016-10-14
6
57 Views
Last Modified: 2016-10-31
Hi,

For some reason, the code is only "accurate" for the first time you run it. After the second time, it is showing the value that submitted from the previous time, kind of confused.  thanks

    <script type = "text/javascript">
        function Confirm() {
            var confirm_value = document.createElement("INPUT");
            confirm_value.type = "hidden";
            confirm_value.name = "confirm_value";
            if (confirm("Report name exists already. Do you want to replace this report?")) {
                confirm_value.value = "Yes";
            } else {
                confirm_value.value = "No";
            }
            document.forms[0].appendChild(confirm_value);
        }
    </script>

 <asp:Button id="SaveReportbtn" onclick="SaveReportbtn_Click"  CustomParameter="listBox1" runat="server" text="Save Report" />Report" />

Open in new window



                    ScriptManager.RegisterStartupScript(this, GetType(), "myFunction", "Confirm();", true);     

                    string confirmValue = Request.Form["confirm_value"];
                    if (confirmValue == "Yes")
                    {
                        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked YES!')", true);
                     
                    }
                    else
                    {
                        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked NO!')", true);
                     


                    }

Open in new window

0
Comment
Question by:mcrmg
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
6 Comments
 
LVL 57

Expert Comment

by:Julian Hansen
ID: 41844417
Every time you click the button a new hidden input is being created.
    <script type = "text/javascript">
        function Confirm() {
            // CREATED HERE
            var confirm_value = document.createElement("INPUT");
            confirm_value.type = "hidden";
            confirm_value.name = "confirm_value";
            if (confirm("Report name exists already. Do you want to replace this report?")) {
                confirm_value.value = "Yes";
            } else {
                confirm_value.value = "No";
            }
             // ADDED HERE
            document.forms[0].appendChild(confirm_value);
        }
    </script>

Open in new window

So what ends up happening is this
<input type="hidden" name="confirm_value" value="Yes" />
<input type="hidden" name="confirm_value" value="No" />

Open in new window

You will have two controls with confirm_value as the name - only one will win on the server side - which is probably why you are seeing an "older" value.

Two options
1. Don't create the element dynamically - put it on the page with an empty value and an id - then simply set the value by id
document.getElementById('confirm_value').value = 'Yes';

Open in new window


2. This is only an option if you want the entire history. Give each new instance of the control a unique name so that you can retrieve the values on the server side.

I am thinking that 1 is probably the valid answer here.
0
 

Author Comment

by:mcrmg
ID: 41846885
Sorry to reply late.

Where should I place

document.getElementById('confirm_value').value = 'Yes';


Thanks
0
 

Author Comment

by:mcrmg
ID: 41848304
This is my code, for some reason, it is sending empty value.  Thank you

    <script type = "text/javascript">
        function Confirm() {
            var confirm_value = document.createElement("INPUT");
            confirm_value.type = "hidden";
            confirm_value.name = "confirm_value";
            if (confirm("Report name exists already. Do you want to replace this report?")) {
                //confirm_value.value = "Yes";
                document.getElementById('confirm_value').value = 'Yes';
                //alert('111');
            } else {
            //confirm_value.value = "No";
            document.getElementById('confirm_value').value = 'No';
            //alert('000');
            }
            
           // document.forms[0].appendChild(confirm_value);
            
        }
    </script>

<form>
<input type="text" id="confirm_value" value="">
</form>

Open in new window


code behind
                    ScriptManager.RegisterStartupScript(this, GetType(), "myFunction", "Confirm();", true);     

                    string confirmValue = Request.Form["confirm_value"];
                    this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert(" + confirmValue + ")", true);
                    
                    if (confirmValue == "Yes")
                    {
                        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked YES!')", true);
                    }
                    else
                    {
                        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert('You clicked NO!')", true);


                    }

Open in new window

0
Salesforce Made Easy to Use

On-screen guidance at the moment of need enables you & your employees to focus on the core, you can now boost your adoption rates swiftly and simply with one easy tool.

 
LVL 57

Accepted Solution

by:
Julian Hansen earned 500 total points
ID: 41848339
Take out lines 3-5 of the first listing
Add a hidden input to the page with id=confirm_value and name=confirm_value
0
 

Author Comment

by:mcrmg
ID: 41850476
I think I found out the problem. But needs direction on how to solve this.

When a button is clicked, it calls the function in the code-behind first, then call the javascript function before the YES/NO is set.  

How can I cal javascript first then pass it to code behind?  thanks
0
 

Author Closing Comment

by:mcrmg
ID: 41867218
thank you
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

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

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…
Are you ready to implement Active Directory best practices without reading 300+ pages? You're in luck. In this webinar hosted by Skyport Systems, you gain insight into Microsoft's latest comprehensive guide, with tips on the best and easiest way…

751 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