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Accepted
Emy
Asked: 2022-07-18 18:00:48 +0800 CST 2022-07-18 18:00:48 +0800 CST

Execute a method after a few seconds in asp.net

  • 772

Good morning everyone. I'll tell you about the situation, I have a button that when clicked shows the message in a label and I have a method that should show another message after 3 seconds, but it doesn't work for me. I tried it in console and the method is executed. I don't understand the reason.

<form runat="server">
<asp:Label runat="server" ID="lblMessage"></asp:Label>
<asp:Button runat="server" OnClick="btn_Click" ID="btn" Text="Probar" />
</form>

protected void btn_Click(object sender, EventArgs e){
   lblMessage.Text = "hola";
   Task.Delay(new TimeSpan(0, 0, 3)).ContinueWith(o => { lblMessage.Text = "3 segundos"; });
}
c#

1 Answers

  1. Best Answer

    When you call Task.Delay(...the code it is creating a new thread for that action, but btn_click terminates and the rendering of the page continues. it is part of the ASP.NET Life Cycle .

    In your case, you should use JavaScript for the delay.

    <script src="Scripts/jquery-3.4.1.js"></script>
<script>
    $(document).ready(function () {

        $('#btn').click(function () {
            var delayInMilliseconds = 1000; //1 second

           setTimeout(function() {
             //Tu codigo aqui
             $('#lblMessage').text("Hola");
           }, delayInMilliseconds);

            
        });
    });
</script>
    • 1