Form.Activate Event

 

Occurs when a form becomes active. This API is obsolete. For information about how to develop ASP.NET mobile applications, see the www.asp.net/mobile Web site.

Namespace:   System.Web.UI.MobileControls
Assembly:  System.Web.Mobile (in System.Web.Mobile.dll)

public event EventHandler Activate

The Activate event occurs under the following circumstances:

  • When a page is first requested, the first form is activated.

  • When the ActiveForm property of the page is set programmatically.

  • When the user navigates to a form through a Link control whose target is a form.

This event's position in the event chain makes it very important for binding child controls to data sources or for setting a form property that can be inherited by all child controls.

The following code example shows how to set the OnActivate attribute in the Form element to point to a method that executes when the Activate event occurs. The Form2_Activate method prepares the second form for display. This example is part of a larger example for the Form overview.

System_CAPS_noteNote

The following code example uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code example must be copied into an empty text file that has an .aspx extension. For more information, see ASP.NET Web Forms Page Syntax Overview.

// When Form2 is activated
private void Form2_Activate(object sender, EventArgs e)
{
    Form2.BackColor = Color.DarkGray;
    Form2.ForeColor = Color.White;
    Form2.Font.Bold = BooleanOption.True;
}
<html xmlns="http://www.w3.org/1999/xhtml" >
<body>
<!-- The first Form -->
    <mobile:Form ID="Form1" Runat="server" 
        Paginate="true" OnActivate="Form_Activate" 
        OnPaginated="Form_Paginated">
        <mobile:link ID="Link1" Runat="server" 
            NavigateUrl="#Form2">
            Go To Other Form
        </mobile:link>
        <mobile:Label ID="Label1" Runat="server">
            Welcome to ASP.NET
        </mobile:Label>
        <mobile:textview ID="txtView" Runat="server" />

        <mobile:DeviceSpecific ID="DevSpec" Runat="server">
            <Choice>
                <FooterTemplate>
                    <mobile:Label runat="server" id="lblCount" />
                </FooterTemplate>
            </Choice>
        </mobile:DeviceSpecific>

    </mobile:Form>

    <!-- The second Form -->
    <mobile:Form ID="Form2" Runat="server" 
        Paginate="true" OnPaginated="Form_Paginated">
        <mobile:Label ID="message2" Runat="server">
            Welcome to ASP.NET
        </mobile:Label>
        <mobile:link ID="Link2" Runat="server" 
            NavigateUrl="#Form1">Back</mobile:link>
    </mobile:Form>
</body>
</html>

.NET Framework
Available since 1.1
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