D
Daniel
Is there any other way can override this event, like javascript onchange
added to the attribute of this dropdownlist?
Thanks
added to the attribute of this dropdownlist?
Thanks
S
Shaun C McDonnell
Set the AutoPostBack property to "true" on the DropDownList.
Shaun
Shaun
D
Daniel
Yes, i've done that, but still cannot fire up, there is a javascript
onChange on this dropdownlist, i wonder it will affect this.
Thanks.
onChange on this dropdownlist, i wonder it will affect this.
Thanks.
M
martin
try returning "true" from the dropdown list
<select ddl... onchange="myevent();return true;"
I noticed that I had to use this method on a checkbox that poste back.
make sure that true is returne before the call to the .net generated
javascript.
HTH
cheers
martin
<select ddl... onchange="myevent();return true;"
I noticed that I had to use this method on a checkbox that poste back.
make sure that true is returne before the call to the .net generated
javascript.
HTH
cheers
martin
A
avnrao
you said you are adding it as an attribute..
if you are doing this..
DropDownList1.Attributes.Add("onchange","alert(2);return;");
make sure that you should not have the return status after your javascript
executes. remove the RETURN from above line.
asp.net spits out the html like this..
<select name="DropDownList1"
onchange="alert(2);return;__doPostBack('DropDownList1','')"..
so having return on onchange would not fire post back.
Av.
if you are doing this..
DropDownList1.Attributes.Add("onchange","alert(2);return;");
make sure that you should not have the return status after your javascript
executes. remove the RETURN from above line.
asp.net spits out the html like this..
<select name="DropDownList1"
onchange="alert(2);return;__doPostBack('DropDownList1','')"..
so having return on onchange would not fire post back.
Av.
S
Steven Cheng[MSFT]
HI Daniel,
I've also found some other former threads you posted discussing on this
problem. Since this is a strange behavior , I'd like to confirm some other
things:
1. Are there any other controls which can autopostback such as "TextBox" ,
"CheckBox" also suffering the problem?
2. Does this problem occur in many pages or just one particular page?
3. What about creating a new simple web project and a page to do the same
test?
Here is a test page I use to test on my side, please have a check to see
whether it works.
==================aspx page=====================
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>AutoPostBack</title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema"
content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<table width="100%" align="center">
<tr>
<td>
<asp:TextBox id="TextBox1" runat="server"
AutoPostBack="True"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp
ropDownList id="DropDownList1" runat="server"
AutoPostBack="True">
<asp:ListItem Value="aaa" Selected="True">aaa</asp:ListItem>
<asp:ListItem Value="bbb">bbb</asp:ListItem>
<asp:ListItem Value="ccc">ccc</asp:ListItem>
<asp:ListItem Value="ddd">ddd</asp:ListItem>
</aspropDownList></td>
</tr>
<tr>
<td>
<asp:ListBox id="ListBox1" runat="server" AutoPostBack="True">
<asp:ListItem Value="aaa">aaa</asp:ListItem>
<asp:ListItem Value="bbb">bbb</asp:ListItem>
<asp:ListItem Value="ccc">ccc</asp:ListItem>
<asp:ListItem Value="ddd">ddd</asp:ListItem>
</asp:ListBox></td>
</tr>
</table>
</form>
</body>
</HTML>
==============code behind=====================
Public Class AutoPostBack
Inherits System.Web.UI.Page
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
Protected WithEvents DropDownList1 As
System.Web.UI.WebControls.DropDownList
Protected WithEvents ListBox1 As System.Web.UI.WebControls.ListBox
'NOTE: The following placeholder declaration is required by the Web
Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
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
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
End Sub
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles TextBox1.TextChanged
Response.Write("TextBox1 is AutoPostBack!")
End Sub
Private Sub DropDownList1_SelectedIndexChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
DropDownList1.SelectedIndexChanged
Response.Write("DropDownList1 is AutoPostBack!")
End Sub
Private Sub ListBox1_SelectedIndexChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
ListBox1.SelectedIndexChanged
Response.Write("ListBox1 is AutoPostBack!")
End Sub
End Class
=====================================================
Regards,
Steven Cheng
Microsoft Online Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
Get Preview at ASP.NET whidbey
http://msdn.microsoft.com/asp.net/whidbey/default.aspx
I've also found some other former threads you posted discussing on this
problem. Since this is a strange behavior , I'd like to confirm some other
things:
1. Are there any other controls which can autopostback such as "TextBox" ,
"CheckBox" also suffering the problem?
2. Does this problem occur in many pages or just one particular page?
3. What about creating a new simple web project and a page to do the same
test?
Here is a test page I use to test on my side, please have a check to see
whether it works.
==================aspx page=====================
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>AutoPostBack</title>
<meta name="GENERATOR" content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" content="Visual Basic .NET 7.1">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema"
content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<table width="100%" align="center">
<tr>
<td>
<asp:TextBox id="TextBox1" runat="server"
AutoPostBack="True"></asp:TextBox>
</td>
</tr>
<tr>
<td>
<asp
ropDownList id="DropDownList1" runat="server"AutoPostBack="True">
<asp:ListItem Value="aaa" Selected="True">aaa</asp:ListItem>
<asp:ListItem Value="bbb">bbb</asp:ListItem>
<asp:ListItem Value="ccc">ccc</asp:ListItem>
<asp:ListItem Value="ddd">ddd</asp:ListItem>
</asp
ropDownList></td></tr>
<tr>
<td>
<asp:ListBox id="ListBox1" runat="server" AutoPostBack="True">
<asp:ListItem Value="aaa">aaa</asp:ListItem>
<asp:ListItem Value="bbb">bbb</asp:ListItem>
<asp:ListItem Value="ccc">ccc</asp:ListItem>
<asp:ListItem Value="ddd">ddd</asp:ListItem>
</asp:ListBox></td>
</tr>
</table>
</form>
</body>
</HTML>
==============code behind=====================
Public Class AutoPostBack
Inherits System.Web.UI.Page
#Region " Web Form Designer Generated Code "
'This call is required by the Web Form Designer.
<System.Diagnostics.DebuggerStepThrough()> Private Sub
InitializeComponent()
End Sub
Protected WithEvents TextBox1 As System.Web.UI.WebControls.TextBox
Protected WithEvents DropDownList1 As
System.Web.UI.WebControls.DropDownList
Protected WithEvents ListBox1 As System.Web.UI.WebControls.ListBox
'NOTE: The following placeholder declaration is required by the Web
Form Designer.
'Do not delete or move it.
Private designerPlaceholderDeclaration As System.Object
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
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
End Sub
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e
As System.EventArgs) Handles TextBox1.TextChanged
Response.Write("TextBox1 is AutoPostBack!")
End Sub
Private Sub DropDownList1_SelectedIndexChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
DropDownList1.SelectedIndexChanged
Response.Write("DropDownList1 is AutoPostBack!")
End Sub
Private Sub ListBox1_SelectedIndexChanged(ByVal sender As
System.Object, ByVal e As System.EventArgs) Handles
ListBox1.SelectedIndexChanged
Response.Write("ListBox1 is AutoPostBack!")
End Sub
End Class
=====================================================
Regards,
Steven Cheng
Microsoft Online Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
Get Preview at ASP.NET whidbey
http://msdn.microsoft.com/asp.net/whidbey/default.aspx
D
Daniel
Hi, steven
There is a listbox on the same page, on the design page, i double click
this, and in the code behind i have the below, and i make it autopostback
true.
Private Sub lstCTSUnit_SelectedIndexChanged(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles lstCTSUnit.SelectedIndexChanged
Response.Write("Test from Fei")
End Sub
It doesnot work!
Strange, AND i really need help!
Thanks!
There is a listbox on the same page, on the design page, i double click
this, and in the code behind i have the below, and i make it autopostback
true.
Private Sub lstCTSUnit_SelectedIndexChanged(ByVal sender As System.Object,
ByVal e As System.EventArgs) Handles lstCTSUnit.SelectedIndexChanged
Response.Write("Test from Fei")
End Sub
It doesnot work!
Strange, AND i really need help!
Thanks!
S
Steven Cheng[MSFT]
Hi Daniel,
What about the demo page I provided in the last reply? Is it also not
working? If a new created page or even a simple page in a new created
project still suffering the problem. I'm afraid there must be some thing
incorrect with the ASP.NET 's installation on the machine. You can try use
the aspnet_regiis.exe tool in the
"{driver}:\WINDOWS\Microsoft.NET\Framework\v1.1.4322" folder and type the
following command:
aspnet_regiis -u
aspnet_regiis -i
to uninstall and reinstall the ASP.NET on the machine. Thanks
Regards,
Steven Cheng
Microsoft Online Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
Get Preview at ASP.NET whidbey
http://msdn.microsoft.com/asp.net/whidbey/default.aspx
What about the demo page I provided in the last reply? Is it also not
working? If a new created page or even a simple page in a new created
project still suffering the problem. I'm afraid there must be some thing
incorrect with the ASP.NET 's installation on the machine. You can try use
the aspnet_regiis.exe tool in the
"{driver}:\WINDOWS\Microsoft.NET\Framework\v1.1.4322" folder and type the
following command:
aspnet_regiis -u
aspnet_regiis -i
to uninstall and reinstall the ASP.NET on the machine. Thanks
Regards,
Steven Cheng
Microsoft Online Support
Get Secure! www.microsoft.com/security
(This posting is provided "AS IS", with no warranties, and confers no
rights.)
Get Preview at ASP.NET whidbey
http://msdn.microsoft.com/asp.net/whidbey/default.aspx