Improve company productivity with a Business Account.Sign Up

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 111
  • Last Modified:

javascript call

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
mcrmg
Asked:
mcrmg
  • 4
  • 2
1 Solution
 
Julian HansenCommented:
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
 
mcrmgAuthor Commented:
Sorry to reply late.

Where should I place

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


Thanks
0
 
mcrmgAuthor Commented:
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
Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
Julian HansenCommented:
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
 
mcrmgAuthor Commented:
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
 
mcrmgAuthor Commented:
thank you
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

Featured Post

Get expert help—faster!

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

  • 4
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now