Form Validation of ASP.NET's DropDownList

[Wes Weems]

I'd like to have a 3 values in a drop down, and have a validator not allow a
form submit unless its 2 of the 3 values (eg, one of the values says "select
one")

I used custom validator and did a if(args.value == "0"){args.IsVal id =
false;)
however it seemed like it never even fired that validator, even though the
submit button CausesValidatio n = true,
Thanks,
Ronnyek

[Mike Moore [MSFT]]

Hi Wes,

First off, you can't have the drop lists set to autopostback. This is
because drop lists do not cause validation and you need validation.

Here's how I setup your scenario.

I have a drop list, a custom validator and a button as follows (the drop
list I load with two values "One" and "Two"):

<asp:dropdownli st id="DropDownLis t1" runat="server"
AutoPostBack="T rue"></asp:dropdownlis t>
<asp:customvali dator id="CustomValid ator2" runat="server"
ClientValidatio nFunction="Cust omValidator2_Va lidate">Error</asp:customvalid a
tor>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button>

The custom validator is not set to any ControlToValida te so that it will
execute even if the control it is validating is blank.

Then I set the validator's client script as follows
function CustomValidator 2_Validate(sour ce, arguments) {
if (document.all(" DropDownList1") .value == "Two")
{
arguments.IsVal id = false;
}
else
{
arguments.IsVal id = true;
}
}

---
I hope this helps.

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three straightforward
steps listed to improve your computer’s security.

This posting is provided "AS IS", with no warranties, and confers no rights.
--------------------

From: "Wes Weems" <ww**********@c harter.net>
Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
Subject: Form Validation of ASP.NET's DropDownList
Date: Sun, 19 Oct 2003 22:39:56 -0700
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I'd like to have a 3 values in a drop down, and have a validator not allow a form submit unless its 2 of the 3 values (eg, one of the values says "select one")

I used custom validator and did a if(args.value == "0"){args.IsVal id =
false;)
however it seemed like it never even fired that validator, even though the
submit button CausesValidatio n = true,
Thanks,
Ronnyek

[Mike Moore [MSFT]]

Hi Wes,

First off, you can't have the drop lists set to autopostback. This is
because drop lists do not cause validation and you need validation.

Here's how I setup your scenario.

I have a drop list, a custom validator and a button as follows (the drop
list I load with two values "One" and "Two"):

<asp:dropdownli st id="DropDownLis t1" runat="server"
AutoPostBack="T rue"></asp:dropdownlis t>
<asp:customvali dator id="CustomValid ator2" runat="server"
ClientValidatio nFunction="Cust omValidator2_Va lidate">Error</asp:customvalid a
tor>
<asp:Button id="Button1" runat="server" Text="Button"></asp:Button>

The custom validator is not set to any ControlToValida te so that it will
execute even if the control it is validating is blank.

Then I set the validator's client script as follows
function CustomValidator 2_Validate(sour ce, arguments) {
if (document.all(" DropDownList1") .value == "Two")
{
arguments.IsVal id = false;
}
else
{
arguments.IsVal id = true;
}
}

---
I hope this helps.

Thank you, Mike
Microsoft, ASP.NET Support Professional

Microsoft highly recommends to all of our customers that they visit the
http://www.microsoft.com/protect site and perform the three straightforward
steps listed to improve your computer’s security.

This posting is provided "AS IS", with no warranties, and confers no rights.
--------------------

From: "Wes Weems" <ww**********@c harter.net>
Newsgroups: microsoft.publi c.dotnet.framew ork.aspnet
Subject: Form Validation of ASP.NET's DropDownList
Date: Sun, 19 Oct 2003 22:39:56 -0700
Organization: Posted via Supernews, http://www.supernews.com
Message-ID: <vp************ @corp.supernews .com>
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2800.1158
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165
X-Complaints-To: ab***@supernews .com
Lines: 14
Path: cpmsftngxa06.ph x.gbl!TK2MSFTNG P08.phx.gbl!new sfeed00.sul.t-online.de!t-onlin
e.de!130.59.10. 21.MISMATCH!ira zu.switch.ch!sw itch.ch!in.100p roofnews.com!td s
net-transit!newspee r.tds.net!sn-xit-02!sn-xit-06!sn-post-02!sn-post-01!super
news.com!corp.s upernews.com!no t-for-mail Xref: cpmsftngxa06.ph x.gbl microsoft.publi c.dotnet.framew ork.aspnet:1852 57
X-Tomcat-NG: microsoft.publi c.dotnet.framew ork.aspnet

I'd like to have a 3 values in a drop down, and have a validator not allow a form submit unless its 2 of the 3 values (eg, one of the values says "select one")

I used custom validator and did a if(args.value == "0"){args.IsVal id =
false;)
however it seemed like it never even fired that validator, even though the
submit button CausesValidatio n = true,
Thanks,
Ronnyek