Solved

ASP.NET: Problem with multiple user controls on same page

Posted on 2008-10-14
4
501 Views
Last Modified: 2013-11-07
Hi,
I built a user control to validate and compare two values and I use it on my page. When I only have one instance of the user control, the control works fine. But When I put many of them on the same page, if I type a value in the first instance, it is reflected invisibly on the last one. This make that I can't make do my comparison(done with Javascript) any more. Does some one know why?


<%@ Control Language="C#" AutoEventWireup="true" CodeFile="TextBoxcompareDate.ascx.cs" Inherits="TextBoxcompareDate" %>
<%@ Register TagPrefix="Date" Namespace="userControls" Assembly="TextBoxDate" %>
 
<head >
    <title>Untitled Page</title>
    <script language="javascript" type="text/javascript">
 
function validateDates(source, arguements)
{
    var thevalue = arguements.Value;
    
    arguements.IsValid=false;    
    
    if(!validateDate(thevalue))
    {
        alert(source.errormessage);
        return;
    }
    arguements.IsValid=true;  
            
}
function compareStartEnd()
{ 
var stringFromDate = document.getElementById('<%=txtStart.ClientID%>').value;
var stringToDate = document.getElementById('<%=txtEnd.ClientID%>').value;
 
var FromDate = Date.parse(stringFromDate);
                var ToDate = Date.parse(stringToDate);
                if (FromDate > ToDate)
                    alert('The end date must be greather than the start date');
}
 
    </script>
</head>
<table width="100%">
    <tr>
        <td align="right" width="75%">
            <asp:Label ID="lblCaption" runat="server" Text="Title: " Font-Names="Verdana" Font-Size="10px" ForeColor="#000000"></asp:Label>
        </td>
        <td align="left" width="10%">
            <asp:TextBox 
                ID="txtStart" 
                runat="server" 
                MaxLength="10" 
                Width="80px"             
                style="padding: 2px;border:solid 1px #92C86A;background-color: #ffffff;font-family:Verdana;font-size: 11px;color:#000000;"
                onfocus="this.select();"></asp:TextBox>
         </td>
         <td align="center" width="5%">
            <span style="font-family:Verdana;font-size: 10px;font-weight:bold;color:#000000;">-</span>	        
         </td>
         <td align="left" width="10%">
            <asp:TextBox 
                ID="txtEnd" 
                runat="server" 
                MaxLength="10" 
                Width="80px" 
                style="padding: 2px;border:solid 1px #92C86A;background-color: #ffffff;font-family:Verdana;font-size: 11px;color:#000000;" 
                onfocus="this.select();" 
                onchange="compareStartEnd();" ></asp:TextBox>
        </td>            
    </tr>            
</table>
<asp:CustomValidator 
    ID="cuvStart" 
    runat="server" 
    ControlToValidate="txtStart" 
    ClientValidationFunction="validateDates" 
    ErrorMessage="Incorrect starting date." 
    SetFocusOnError="true"
    Display="None">&nbsp</asp:CustomValidator>
<asp:CustomValidator 
    ID="cuvEnd" 
    runat="server" 
    ControlToValidate="txtEnd" 
    ClientValidationFunction="validateDates" 
    ErrorMessage="Incorrect ending date" 
    SetFocusOnError="true"
    Display="None">&nbsp</asp:CustomValidator>

Open in new window

0
Comment
Question by:karakav
  • 2
4 Comments
 
LVL 13

Expert Comment

by:crazyman
ID: 22710780
This is beacuse your functions are not unique.
you can name your function like

function validateDates_<%=this.ClientID%>(source, arguements)


then hook up your validators in OnLoad like

cuvEnd.ClientValidationFunction = string.format("validateDates_{0}",this.ClientID);
0
 
LVL 8

Accepted Solution

by:
the_crazed earned 500 total points
ID: 22711004
as your function is part of the user control, you're redeclaring the same function over and over, changing the startid and endid

I'd take the function out of the control, put it in a common js file, and alter it to something like the code below.

then your onchange needs to be:
onchange="compareStartEnd(event);"
function compareStartEnd(e)
{ 
    if(!e) e=event;
    if(e.srcElement) var el = e.srcElement
    else var el = e.target;
 
    var endId = el.id;
    var startId = endId.replace("txtEnd","txtStart")
 
    var stringFromDate = document.getElementById(startId).value;
    var stringToDate = document.getElementById(endId).value;
 
    var FromDate = Date.parse(stringFromDate);
                var ToDate = Date.parse(stringToDate);
                if (FromDate > ToDate)
                    alert('The end date must be greather than the start date');
}

Open in new window

0
 
LVL 4

Author Closing Comment

by:karakav
ID: 31505832
Thanks a lot. Do you mind telling me how I can set back to focus to the control upon the error message?
0
 
LVL 8

Expert Comment

by:the_crazed
ID: 22718944
yep, you've got a pointer to the original control there in "el" so you just add this at the end:
el.focus();

Open in new window

0

Featured Post

Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

Question has a verified solution.

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

A long time ago (May 2011), I have written an article showing you how to create a DLL using Visual Studio 2005 to be hosted in SQL Server 2005. That was valid at that time and it is still valid if you are still using these versions. You can still re…
Real-time is more about the business, not the technology. In day-to-day life, to make real-time decisions like buying or investing, business needs the latest information(e.g. Gold Rate/Stock Rate). Unlike traditional days, you need not wait for a fe…
The viewer will learn the basics of jQuery, including how to invoke it on a web page. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery.: (CODE)
The viewer will learn the basics of jQuery including how to code hide show and toggles. Reference your jQuery libraries: (CODE) Include your new external js/jQuery file: (CODE) Write your first lines of code to setup your site for jQuery…

820 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