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Required Validation with AllowCustomText

4 Answers 150 Views

ComboBox

This is a migrated thread and some comments may be shown as answers.

Phil H. asked on 27 Oct 2014, 02:53 PM

Hi:

I have to to be persistent, but I can get the validation to be ignored. First the code (view):

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>

<%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<title></title>

</head>

<body>

<form id="form1" runat="server">

<telerik:RadScriptManager ID="RadScriptManager1" runat="server"></telerik:RadScriptManager>

<div>

<telerik:RadComboBox ID="haulerDropDown" runat="server"

DataSourceID = "haulerDataSource" DataTextField="Text" DataValueField="Value"

AllowCustomText="true" Width="200" >

</telerik:RadComboBox>

<asp:RequiredFieldValidator ID="RequiredFieldValidator5" runat="server"

ControlToValidate="haulerDropDown" ValidationGroup="HeaderValidationGroup"

ErrorMessage="'Hauler' is required" Text="*" ForeColor="Red"

/>

</div>

<asp:Button ID="Button1" runat="server" Text="Button" ValidationGroup="HeaderValidationGroup" />

<asp:ObjectDataSource ID="haulerDataSource" runat="server"

SelectMethod="Hauler" TypeName="App.DropDowns">

</asp:ObjectDataSource>

</form>

</body>

</html>

Code behind:

Option Strict On

Option Explicit On

Partial Class _Default

Inherits System.Web.UI.Page

Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

Dim _value As String = haulerDropDown.SelectedValue

Dim _i As Integer = 1

End Sub

End Class

and data for the data source (in App_Code):

Option Strict On

Option Explicit On

Imports Microsoft.VisualBasic

Namespace App

Public Class DropDown

Public Property Value() As String

Public Property Text() As String

Public Property Selected() As Boolean

Public Sub New()

Me.Value = ""

Me.Text = ""

Me.Selected = False

End Sub

Public Sub New(ByVal value As String, ByVal text As String)

Me.Value = value

Me.Text = text

Me.Selected = False

End Sub

Public Sub New(ByVal value As String, ByVal text As String, ByVal selected As Boolean)

Me.Value = value

Me.Text = text

Me.Selected = selected

End Sub

End Class

'

Public Class DropDowns

Public Function Hauler() As List(Of DropDown)

Dim _dropDown As List(Of DropDown) = _

New List(Of DropDown) From { _

New DropDown With {.Value = "9 Point", .Text = "9 Point"}, _

New DropDown With {.Value = "R. A.", .Text = "R. A."}, _

New DropDown With {.Value = "A. B.", .Text = "A. B."}, _

New DropDown With {.Value = "B. C.", .Text = "B. C."}, _

New DropDown With {.Value = "Beck", .Text = "Beck"}}

Return _dropDown

End Function

End Class

End Namespace

Now place a break point in the code behind on the _i int. Now launch the page. Click the button and all works as expected (does not submit and the * indicates a validation error). Now delete the text, and tab out and delete the text again and tab out (the combo-box should be empty now). Now click the button and the validation control does NOT stop the submit, and if you check the SelectedValue the combo-box is empty.

Phil

4 Answers, 1 is accepted

answered on 30 Oct 2014, 02:22 PM

Hi Phil,

What is the version of the .NET Framework you have? If you are using .NET 45 please look here:
http://www.telerik.com/forums/asp-net-4-5-unobtrusive-validation-and-radcontrols-for-asp-net-ajax

Please note that the standard ASP.NET RequiredFieldValidator is good for simple scenarios where it needs to validate more simple controls like textboxes. That's why if your logic is a bit complicated you can use CustomValidators.

Regards,
Hristo Valyavicharski
Telerik

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

Accepted

answered on 31 Oct 2014, 02:36 PM

ComboValidators.zip

I made a few tests with both Custom and RequiredField validators. Combo is working with both. Please check these videos:

RequiredFieldValidator - http://screencast.com/t/iDD0BiydH3Z
CustomFieldValidator - http://screencast.com/t/8G5VTZdxEeg

Testing sample is attached.

Regards,
Hristo Valyavicharski
Telerik

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

answered on 03 Nov 2014, 03:23 PM

Hi Hristo:

Thanks for all of your help. The empty value was getting to the code behind, via an IE delete feature in the combo-box text input field (x). I would prefer to use a validation solution so I am going with the following client side custom validation:

function customRequiredValidator(source, arguments) {

var control2Validate = source.controltovalidate;

var combo;

arguments.IsValid = true;

if (arguments.Value == "")

arguments.IsValid = false;

else {

combo = $find(control2Validate);

if (combo.get_value() == "") {

arguments.IsValid = false;

}

The above, I think is generic enough to support multiple combo-boxes on the page. It is also working in a form-view.

Phil