Can I use OnTextChanged in JavaScript for TextBox

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Can I use OnTextChanged in JavaScript for TextBox

Postby Leo » Thu, 20 Nov 2003 03:25:39 GMT

Hi, 
I have my textbox control, I want to fire an event for 
TextChanged, how can I do this?
Thanks
Leo

Can I use OnTextChanged in JavaScript for TextBox

Postby Jon Paugh » Thu, 20 Nov 2003 05:32:52 GMT

try this:
set the "OnChange" attribute for your server side control 
to your js function in the onload event of your page's 
codebehind:

txtYourTextBox.Attributes.Add("onchange","yourfunction()");



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1.JavaScript for OnTextChanged event.

Hi.

I have created a web-based file manager. Now I'd like to watch a folder for 
changes, and when a change occurs I'd like to refresh my page.
Okay. So I have created a FileSystemWatcher set on the folder I need to 
watch. It works fine. The problem occurs when I need to trigger an automatic 
Refresh.
So I added two handlers - OnChanged and OnRename, in the same class as my 
filemanager.

In the handlers I tried to say Response.redirect(mypage) to force the 
refresh, but the error I got was: "Cannot redirect after HTTP headers have 
been sent."

So I tried to change the text of some textbox instead
<asp:textbox id="txtFileSystemWatcher" 
OnTextChanged="javascript:RefreshPage();" Visible=true  Width=500 
Runat=server></asp:textbox>

with this handler:
Private Sub OnChanged(ByVal source As Object, ByVal e As 
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    txtFileSystemWatcher.Text = "FileSystemWatcher: " & "File: " & 
e.FullPath & " " & e.ChangeType
End Sub

and add an OnTextChanged client-side event-handler which looks like this:

function RefreshPage() {
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}

which would force the refresh. However, now I have the following error:
BC30456: 'javascript' is not a member of 'ASP.BrowseFiles_aspx'.

So I changed the HTML to
<asp:textbox id="txtFileSystemWatcher" OnTextChanged="RefreshPage()" 
Visible=true  Width=500 Runat=server></asp:textbox>
and now, sure enough, I get
BC30456: 'RefreshPage' is not a member of 'ASP.BrowseFiles_aspx'.

I also tried in OnLoad of the page to register the event with
txtFileSystemWatcher.Attributes.Add("OnTextChanged", 
"javascript:RefreshPage()")
and
txtFileSystemWatcher.Attributes.Add("OnTextChanged", "RefreshPage()")

but it still does not work.

What am I missing here, please ?

Thank you, Alex 


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