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aspx thread: Can you force client-side processing on a Web Form Button Control?
Message #1 by "Linda Hunnicutt" <lhunni@s...> on Tue, 14 Aug 2001 20:52:26
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Has anyone found a way to force a Web Form Button Control to process on
the client, then either 1)continue on to the server or 2) cancel server
processing? (This would be similar functionality to
the "onbeforeserverevent" in the "old" Design Time Controls in InterDev.)
Thanks.
Message #2 by "Jeremy Stephenson" <jeremy@a...> on Fri, 17 Aug 2001 22:59:08
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You could, for example, force the web form to do some client side
processing first, like so:
<form id="myform" method="post" runat="server" onsubmit="return
validateForm(this);">
and some JavaScript:
function validateForm(objForm){
if (someTestCondition){
alert("Something went wrogn");
return false;
}
else {
return true;
}
}
if the return value is false, the page post will be cancelled. probably.
Cheers
> Has anyone found a way to force a Web Form Button Control to process
on
> the client, then either 1)continue on to the server or 2) cancel server
> processing? (This would be similar functionality to
> the "onbeforeserverevent" in the "old" Design Time Controls in InterDev.)
> Thanks.
Message #3 by "Linda H" <lhunni@s...> on Thu, 23 Aug 2001 18:49:40
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That works at the form level, but has anyone found a way to force a Web
Form BUTTON control to process on the client before it goes to the
server? When I insert this control within a form:
<asp:Button id=btnTest runat="server" onclick="return Foo this);">
</asp:Button>
I get the following error message:
Compiler Error Message: BC30456: The name 'return' is not a member
of 'ASP.WebForm1_aspx'.
> You could, for example, force the web form to do some client side
> processing first, like so:
>
> <form id="myform" method="post" runat="server" onsubmit="return
> validateForm(this);">
>
> and some JavaScript:
>
> function validateForm(objForm){
> if (someTestCondition){
> alert("Something went wrogn");
> return false;
> }
> else {
> return true;
> }
> }
>
> if the return value is false, the page post will be cancelled. probably.
>
> Cheers
>
>
>
> > Has anyone found a way to force a Web Form Button Control to process
> on
> > the client, then either 1)continue on to the server or 2) cancel
server
> > processing? (This would be similar functionality to
> > the "onbeforeserverevent" in the "old" Design Time Controls in
InterDev.)
> > Thanks.
Message #4 by Ankur Kalsi <akalsi@q...> on Thu, 23 Aug 2001 11:08:23 -0700
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The following script should work:
Place the following code between the <HEAD> section:
<script for=3DbtnTest event=3Donclick>
if (someTestCondition)
{
alert("Something went wrong");
return false;
}
</script>
Place this within a <FORM> control:
<asp:Button id=3DbtnTest runat=3D"server" onclick=3D"DeleteRecord">
"DeleteRecord" can be a server side function.
AK
-----Original Message-----
From: Linda H [mailto:lhunni@s...]
Sent: Thursday, August 23, 2001 11:50 AM
To: ASP+
Subject: [aspx] Re: Can you force client-side processing on a Web Form
Button Control?
That works at the form level, but has anyone found a way to force a Web
Form BUTTON control to process on the client before it goes to the
server? When I insert this control within a form:
<asp:Button id=3DbtnTest runat=3D"server" onclick=3D"return Foo
this);">
</asp:Button>
I get the following error message:
Compiler Error Message: BC30456: The name 'return' is not a member
of 'ASP.WebForm1_aspx'.
> You could, for example, force the web form to do some client side
> processing first, like so:
>
> <form id=3D"myform" method=3D"post" runat=3D"server"
onsubmit=3D"return
> validateForm(this);">
>
> and some JavaScript:
>
> function validateForm(objForm){
> if (someTestCondition){
> alert("Something went wrogn");
> return false;
> }
> else {
> return true;
> }
> }
>
> if the return value is false, the page post will be cancelled.
probably.
>
> Cheers
>
>
>
> > Has anyone found a way to force a Web Form Button Control to
process
> on
> > the client, then either 1)continue on to the server or 2) cancel
server
> > processing? (This would be similar functionality to
> > the "onbeforeserverevent" in the "old" Design Time Controls in
InterDev.)
> > Thanks.
Message #5 by "Jason Lung" <jason@e...> on Thu, 23 Aug 2001 15:17:33 -0400
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How can i keep track of the Integer (i) in order to do my increment? Thx
in advance
----------------------------------------------------------------------
Public Class WebForm1
Inherits System.Web.UI.Page
Protected WithEvents lbl_Username As System.Web.UI.WebControls.Label
Protected WithEvents lbl_Password As System.Web.UI.WebControls.Label
Protected WithEvents txb_Username As
System.Web.UI.WebControls.TextBox
Protected WithEvents txb_Password As
System.Web.UI.WebControls.TextBox
Protected WithEvents btn_Reset As System.Web.UI.WebControls.Button
Protected WithEvents lbl_ErrorMessage As
System.Web.UI.WebControls.Label
Protected WithEvents lbl_Welcome As System.Web.UI.WebControls.Label
Protected WithEvents btn_Submit As System.Web.UI.WebControls.Button
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Dim i As Integer
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
If Not Page.IsPostBack Then
lbl_ErrorMessage.Text =3D "Welcome to My Site !"
End If
End Sub
Private Sub btn_Submit_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles btn_Submit.Click
i =3D i + 1
lbl_ErrorMessage.Text =3D "Welcome back to My Login ! for " & i
&
" times ?!"
End Sub
Private Sub btn_Reset_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles btn_Reset.Click
txb_Username.Text =3D ""
txb_Password.Text =3D ""
End Sub
End Class
Message #6 by Todd Carrico <ToddC@m...> on Thu, 23 Aug 2001 14:59:48 -0500
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You need to keep it in the Session, either using session variable, or
sending it to the page in a hidden field.
Something along those lines.
tc
-----Original Message-----
From: Jason Lung [mailto:jason@e...]
Sent: Thursday, August 23, 2001 2:18 PM
To: ASP+
Subject: [aspx] RE: Can you force client-side processing on a Web Form But
ton Control?
How can i keep track of the Integer (i) in order to do my increment? Thx
in advance
----------------------------------------------------------------------
Public Class WebForm1
Inherits System.Web.UI.Page
Protected WithEvents lbl_Username As System.Web.UI.WebControls.Label
Protected WithEvents lbl_Password As System.Web.UI.WebControls.Label
Protected WithEvents txb_Username As
System.Web.UI.WebControls.TextBox
Protected WithEvents txb_Password As
System.Web.UI.WebControls.TextBox
Protected WithEvents btn_Reset As System.Web.UI.WebControls.Button
Protected WithEvents lbl_ErrorMessage As
System.Web.UI.WebControls.Label
Protected WithEvents lbl_Welcome As System.Web.UI.WebControls.Label
Protected WithEvents btn_Submit As System.Web.UI.WebControls.Button
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
Private Sub Page_Init(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Init
'CODEGEN: This method call is required by the Web Form Designer
'Do not modify it using the code editor.
InitializeComponent()
End Sub
#End Region
Dim i As Integer
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
If Not Page.IsPostBack Then
lbl_ErrorMessage.Text = "Welcome to My Site !"
End If
End Sub
Private Sub btn_Submit_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles btn_Submit.Click
i = i + 1
lbl_ErrorMessage.Text = "Welcome back to My Login ! for " & i &
" times ?!"
End Sub
Private Sub btn_Reset_Click(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles btn_Reset.Click
txb_Username.Text = ""
txb_Password.Text = ""
End Sub
End Class
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