CustomValidator.ServerValidate Ereignis

  • Referenz

Definition

Namespace:
System.Web.UI.MobileControls
Assembly:
System.Web.Mobile.dll

Tritt ein, wenn CustomValidator den Wert der ControlToValidate-Eigenschaft überprüft. Diese API ist veraltet. Weitere Informationen zur Entwicklung von mobilen ASP.NET-Anwendungen finden Sie unter Mobile Apps & Websites mit ASP.NET.

public:
 event System::Web::UI::WebControls::ServerValidateEventHandler ^ ServerValidate;
[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

Ereignistyp

ServerValidateEventHandler
Attribute
BindableAttribute

Beispiele

Im folgenden Beispiel wird veranschaulicht, wie das Ereignis zum Hinzufügen von ServerValidate Logik zum Überprüfen der Seite ausgeführt wird.

<%@ 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>

Hinweise

Wenn eine Methode mit diesem Ereignis registriert ist, wird sie mit dem Wert der ControlToValidate Eigenschaft aufgerufen. Die Überprüfung ist nur erfolgreich, wenn dieser Ereignishandler zurückgegeben wird true.

Gilt für:

Siehe auch