1. Advertising
    y u no do it?

    Advertising (learn more)

    Advertise virtually anything here, with CPM banner ads, CPM email ads and CPC contextual links. You can target relevant areas of the site and show ads based on geographical location of the user if you wish.

    Starts at just $1 per CPM or $0.10 per CPC.

Pre Populate form field based on URL

Discussion in 'C#' started by hershel, Nov 9, 2011.

0
  1. #1
    Hi i have the following URL:

    www.mysite.com/product.aspx?PID=1000

    I want to pre-populate a form field with the "PID" value in the URL -

    I have tried using:

    <input type="text" id="PID" value="<%=Request.QueryString("PID")%>">

    but it does not work.

    Can anyone help?

    Thanks
     
    hershel, Nov 9, 2011 IP
  2. DaveCS

    DaveCS Peon

    Messages:
    18
    Likes Received:
    0
    Best Answers:
    0
    Trophy Points:
    0
    #2
    You can do several things.
    1. Catch the query string in the page_load event like so.

    If Request.QueryString.Count > 0 Then
            Dim strQuery As String = Request.QueryString("PID").ToString
            If Not String.IsNullOrEmpty(strQuery) And strQuery.Contains("PID") Then
                  txtPID.Text=strQuery
            End If
        End If
    Code (markup):
    You can get the query string with javascript and call the function in the bodyonload
    hacky badly named variables but works
    
<script type="text/javascript"> 
         function display()
 {              var tabvalueTest = getQueryVariable("PID");
              if (tabvalueTest == 'undefined')
 {                 
 return  
            }  
            var tabvalue = getQueryVariable("PID"); 
             if (tabvalue != "") 
{                   document.getElementById('txtPID').value = tabvalue; //some textbox field 
             }  
                   }  
    </script> <script type="text/javascript">  
   function getQueryVariable(variable)
 {         var query = window.location.search.substring(1);
         var vars = query.split("&"); 
        for (var i = 0; i < vars.length; i++)
 {             var pair = vars[i].split("="); 
            if (pair[0] == variable) 
{                 return pair[1];  
           }      
   }    
 }  
</script>
    Code (markup):
    then
    
<body onload="display()">
    Code (markup):
    You can also use url rewriting and just throw a "PID" number at the page and have it add a variable during load.
     
    DaveCS, Nov 23, 2011 IP