CustomValidator.ServerValidate Event
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Occurs when the CustomValidator validates the value of the ControlToValidate property. This API is obsolete. For information about how to develop ASP.NET mobile applications, see Mobile Apps & Sites with ASP.NET.
public:
event System::Web::UI::WebControls::ServerValidateEventHandler ^ ServerValidate;C#
[System.ComponentModel.Bindable(false)]
public event System.Web.UI.WebControls.ServerValidateEventHandler ServerValidate;[<System.ComponentModel.Bindable(false)>]
member this.ServerValidate : System.Web.UI.WebControls.ServerValidateEventHandler Public Custom Event ServerValidate As ServerValidateEventHandler - Attributes
The following example demonstrates how to trap the ServerValidate event to add logic to validate the page.
ASP.NET (C#)
<%@ Page Language="C#"
Inherits="System.Web.UI.MobileControls.MobilePage" %>
<%@ Register TagPrefix="mobile"
Namespace="System.Web.UI.MobileControls"
Assembly="System.Web.Mobile" %>
<script runat="server">
// If the page validates, go to page 2
protected void Submit_Click(Object sender, EventArgs e)
{
if (Page.IsValid)
{
ActiveForm = Form2;
}
}
// Validate whether the number is even
private void ServerValidate(object source,
ServerValidateEventArgs args)
{
// Convert the text to a number
int num;
Int32.TryParse(numberBox.Text, out num);
// Test for an even number
if (num > 0)
args.IsValid = ((num % 2) == 0);
else
args.IsValid = false;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<body>
<mobile:form id="Form1" runat="server">
<mobile:Label ID="Label1" runat="server">
Please enter an even number greater than zero.
</mobile:Label>
<mobile:TextBox ID="numberBox" Runat="server"
Numeric="true" MaxLength="2" />
<mobile:CustomValidator ID="CustomValidator1"
ControlToValidate="numberBox"
OnServerValidate="ServerValidate" runat="server">
Your number is not an even number.
</mobile:CustomValidator>
<mobile:Command ID="Command1" runat="server"
OnClick="Submit_Click">
Submit
</mobile:Command>
</mobile:form>
<mobile:Form id="Form2" runat="server">
<mobile:Label ID="Label2" runat="server">
Your number is an even number.
</mobile:Label>
</mobile:Form>
</body>
</html>
<%@ Page Language="VB"
Inherits="System.Web.UI.MobileControls.MobilePage" %>
<%@ Register TagPrefix="mobile"
Namespace="System.Web.UI.MobileControls"
Assembly="System.Web.Mobile" %>
<script runat="server">
' If the page validates, go to page 2
Protected Sub Submit_Click(ByVal sender As Object, ByVal e As EventArgs)
If (Page.IsValid) Then
ActiveForm = Form2
End If
End Sub
' Validate whether the number is even
Private Sub ServerValidate(ByVal source As Object, _
ByVal args As ServerValidateEventArgs)
' Convert the text to a number
Dim num As Integer
Integer.TryParse(numberBox.Text, num)
' Test for an even number
If (num > 0) Then
args.IsValid = ((num Mod 2) = 0)
Else
args.IsValid = False
End If
End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<body>
<mobile:form id="Form1" runat="server">
<mobile:Label ID="Label1" runat="server">
Please enter an even number greater than zero.
</mobile:Label>
<mobile:TextBox ID="numberBox" Runat="server"
Numeric="true" MaxLength="2" />
<mobile:CustomValidator ID="CustomValidator1"
ControlToValidate="numberBox"
OnServerValidate="ServerValidate" runat="server">
Your number is not an even number.
</mobile:CustomValidator>
<mobile:Command ID="Command1" runat="server"
OnClick="Submit_Click">
Submit
</mobile:Command>
</mobile:form>
<mobile:Form id="Form2" runat="server">
<mobile:Label ID="Label2" runat="server">
Your number is an even number.
</mobile:Label>
</mobile:Form>
</body>
</html>
If a method is registered with this event, it is called with the value of the ControlToValidate property. Validation succeeds only if this event handler returns true.
Applies to
| Product | Versions |
|---|---|
| .NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
