Question

how do i retrieve variable contents from an aspx page

Asked by: bluedragon99

new to asp.net

I simply want to be able to retrieve the value of fileName as shown below in the codebehind (vb.net) on button click..Thanks!


aspx
    
<div id="divHidden" style="visibility: hidden; width: 0px; height: 0px">
  <input type=file id="fileInput">
</div> 

<input type=button value="click here to get a file" onclick="getFile();"> 
<script language=javascript>
function getFile()
{
  document.all["fileInput"].click();
  var fileName = document.all["fileInput"].value;
 }
</script> 
 

 Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
    'how do i retrieve fileName here??
 End Sub 
                                  
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Asked On
2009-11-06 at 10:35:14ID24878861
Topics

Programming for ASP.NET

,

Visual Studio

Participating Experts
2
Points
500
Comments
13

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Answers

 

by: baiju_nagoriPosted on 2009-11-06 at 10:40:03ID: 25761772

add a runat="server" tag and then use the id to get the value in code behind

 

by: bluedragon99Posted on 2009-11-06 at 10:43:04ID: 25761800

trying to figure out how to access the id...new to this!

 

by: slightwvPosted on 2009-11-06 at 10:59:39ID: 25761969

See if this helps.

<script language="vb" runat="server"> 
Sub Submitbtn_click(sender as object, e as eventargs)
	response.write("<br/>You selected " & fileInput.value)
End Sub  
</script> 

<html>
<body>
  <form id="f1" runat="server"> 
  	<input type="file" id="fileInput" runat="server"> 
	<asp:button id="mybutton" text="click here" runat="server" onclick="Submitbtn_click"/> 
 
  </form>
</body>
</html>
                                              
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by: bluedragon99Posted on 2009-11-06 at 11:04:46ID: 25762028

maybe i'm confused, how would i go about using the code below on the .vb side?  it appears that has to all be done on the .aspx side

<script language="vb" runat="server"> 
Sub Submitbtn_click(sender as object, e as eventargs)
        response.write("<br/>You selected " & fileInput.value)
End Sub  
</script> 

                                              
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by: bluedragon99Posted on 2009-11-06 at 11:06:32ID: 25762056

basically i need the text box below filled with the filename var from the jscript

  <asp:TextBox ID="TheScanFile" runat="server" Width="337px"></asp:TextBox>

                                              
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by: slightwvPosted on 2009-11-06 at 11:06:57ID: 25762061

It was easier to put the code inline for the example.  Just take the code out of the aspx page and move the procedure into the code behind file.

 

by: slightwvPosted on 2009-11-06 at 11:08:16ID: 25762080

>>basically i need the text box below filled with the filename var from the jscript

That's not really what you asked for.  Can you please post exactly what you are after?

 

by: bluedragon99Posted on 2009-11-06 at 11:09:20ID: 25762090

fileInput.Value has no value at the codebehind after clicking another button on the page...is that a postback issue clearing the var?

 

by: bluedragon99Posted on 2009-11-06 at 11:10:17ID: 25762100

on button click in the codebehind i simply need to access the var filename from the script on the aspx side

 

by: slightwvPosted on 2009-11-06 at 11:14:06ID: 25762135

This page takes everything from end-to-end.

http://www.4guysfromrolla.com/webtech/091201-1.shtml

 

by: bluedragon99Posted on 2009-11-06 at 11:16:35ID: 25762166

I'm normally an app guy, this is mainly the reason i don't do web dev....just passing a var to the code behind is seemingly major surgery... frustrating!

 

by: slightwvPosted on 2009-11-06 at 11:18:20ID: 25762187

I know the feeling.  I'm a DBA that dabbles in .Net.  It's not that bad once you get used to it.

 

by: bluedragon99Posted on 2009-11-06 at 11:25:05ID: 25762244

tossed the jscript, you're code worked great.  Thanks!

20120131-EE-VQP-002

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