Hi folks,
I've got a bit of a problem. I have a situation where I build forms
completely dynamically based on a form definition supplied from a database.
Anyway, I noticed that required fields weren't validating on the server
side, so I've whittled the code down to the example below which illustrates
the problem.
Basically, when I programmaticall y create a control and a required field
validator, and don't use client side validation, the server side validation
is performed, but ignored - and my button's Click handler is still called. I
can obviously work around this by doing a if( ! Page.IsValid ) return in
the handler, but the validation system is supposed to ensure that if page
content isn't valid, the button's handler won't be called.....
In the example below, you'll see that the button handler DOES get called,
even though Page.IsValid is false. But here's something interesting - remove
the throw and the redirect from the handler, and you'll see that yes, the
handler still get's called, but when the processing has finished, the page
shows the errors as it should.....
anyway, the code is below, any help would be greatly appreciated, I'm about
to chuck my PC out the window with this one as I don't know whether I'm
doing something really daft or if I've discovered an "issue" in the
framework....
Cheers,
Tony
testit.aspx:
<%@ Page language="c#" Codebehind="val test.aspx.cs" AutoEventWireup ="false"
Inherits="trini ty.admin.develo per.sampler.val test" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<body>
<form id="Form1" method="post" runat="server">
<asp:Validation Summary ID="_summary" ShowMessageBox= "True" Runat="server"/>
<asp:PlaceHolde r ID="_form" Runat="server"/>
<asp:Button ID="_save" Text="Save" Runat="server"/>
</form>
</body>
</HTML>
testit.aspx.cs:
using System;
using System.Collecti ons;
using System.Componen tModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.Sess ionState;
using System.Web.UI;
using System.Web.UI.W ebControls;
using System.Web.UI.H tmlControls;
namespace trinity.admin.d eveloper.sample r
{
/// <summary>
/// Summary description for valtest.
/// </summary>
public class valtest : System.Web.UI.P age
{
protected System.Web.UI.W ebControls.Text Box TextBox1;
protected System.Web.UI.W ebControls.Butt on Button1;
protected System.Web.UI.W ebControls.Vali dationSummary _summary;
protected System.Web.UI.W ebControls.Plac eHolder _form;
protected System.Web.UI.W ebControls.Butt on _save;
protected System.Web.UI.W ebControls.Requ iredFieldValida tor
RequiredFieldVa lidator1;
private void Page_Load(objec t sender, System.EventArg s e)
{
// Put user code to initialize the page here
TextBox b = new TextBox();
b.ID = "theTextBox ";
_form.Controls. Add(b);
RequiredFieldVa lidator v = new RequiredFieldVa lidator();
v.EnableClientS cript = false;
v.ControlToVali date = "theTextBox ";
v.ErrorMessage = "Problem";
v.ID = "thevalidat or";
_form.Controls. Add(v);
}
#region Web Form Designer generated code
override protected void OnInit(EventArg s e)
{
//
// CODEGEN: This call is required by the ASP.NET Web Form Designer.
//
InitializeCompo nent();
base.OnInit(e);
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeCompo nent()
{
this._save.Clic k += new System.EventHan dler(this._save _Click);
this.Load += new System.EventHan dler(this.Page_ Load);
}
#endregion
private void _save_Click(obj ect sender, System.EventArg s e)
{
if( ! Page.IsValid ) throw new Exception("I shouldn't get called here!");
Response.Redire ct("/", true);
}
}
}
