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Question

How do I make a Textbox Postback on KeyUp?

Answer 1

A:

Would this help you?

http://stackoverflow.com/questions/1009086/how-to-make-an-asp-net-textbox-fire-its-ontextchanged-event-fire-in-an-ajax-upda

Kyle B. 2009-11-18 19:05:23

I tried this but it only works on the first key pressed. after that the textbox loses focus and each subsequent keypress doesn't fire the event. as you can see, contrary to the post you recommended, my textbox is not inside my updatepanel yet it still loses focus.

Russ Bradberry 2009-11-18 19:24:33

Answer 2

+2 A:

Hi, This will solve your problem. Logic is same as the solution suggested by Kyle.

Have a look at this.

<head runat="server">
<title></title>
<script type="text/javascript">
    function RefreshUpdatePanel() {
        __doPostBack('<%= Code.ClientID %>', '');
    };
</script>

    <asp:TextBox ID="Code" runat="server" onkeyup="RefreshUpdatePanel();" AutoPostBack="true" OnTextChanged="Code_TextChanged"></asp:TextBox>
    <asp:UpdatePanel ID="Update" runat="server">
        <ContentTemplate>
            <asp:DropDownList runat="server" ID="DateList" />
            <asp:TextBox runat="server" ID="CurrentTime" ></asp:TextBox>
        </ContentTemplate>
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="Code" />
        </Triggers>
    </asp:UpdatePanel>

Code behind goes like this...

 protected void Code_TextChanged(object sender, EventArgs e)
    {
        //Adding current time (minutes and seconds) into dropdownlist
        DateList.Items.Insert(0, new ListItem(DateTime.Now.ToString("mm:ss")));

        //Setting current time (minutes and seconds) into textbox
        CurrentTime.Text = DateTime.Now.ToString("mm:ss");
    }

I have added additional textbox to see change in action, do remove the textbox.

Cheers

Sandy 2009-11-20 06:00:58

the same happens with this. When the updatepanel refreshes the textbox loses focus

Russ Bradberry 2009-11-20 17:42:26

Just remove AutoPostBack="true" with this solution and it should work.

rick schott 2009-11-21 01:25:23

Rick's comment is correct, remove the AutoPostBack and it will work smoothly

Tom Halladay 2010-05-21 00:28:25

Answer 3

A:

this is awesome ! thanks !!

Alex 2010-02-09 22:26:55

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How do I make a Textbox Postback on KeyUp?

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