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Listing 31.8 - ShowAlert.aspx

Listing 31.8 - ShowAlert.aspx (C#)
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<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">

    protected void btnDeleteAll_Click(object sender, EventArgs e)
    {
        if (FileHelper.DeleteAll() == true)
        {
            string script = @"alert('All Files Deleted Successfully!');";
            Page.ClientScript.RegisterStartupScript(this.GetType(), "filesDeleted", script, true);
        }
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Show Alert</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>

    <asp:Button
        id="btnDeleteAll"
        Text="Delete All Files"
        OnClick="btnDeleteAll_Click" 
        Runat="server" />
    
    </div>
    </form>
</body>
</html>