How do I make a Textbox Postback on KeyUp?

Solution 1:

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.

Solution 2:

Here is a simple way to do it with javascript, an update panel, gridview, sqldatasource and a textbox. As you type it searches the table and displays the results. Short and sweet, no code behind.

<%@ Page Language="VB" AutoEventWireup="false" CodeFile="test3.aspx.vb" Inherits="test3" %>

<%@ Register assembly="AjaxControlToolkit" namespace="AjaxControlToolkit" tagprefix="asp" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
 <script type="text/javascript">
     function runPostback() {
         document.forms["form1"].submit();
         document.getElementById("TextBox1").focus();
     }
     function getFocus(){
         var text = document.getElementById("TextBox1");
         if (text != null && text.value.length > 0) {
             if (text.createTextRange) {
                 var FieldRange = text.createTextRange();
                 FieldRange.moveStart('character', text.value.length); 
                 FieldRange.collapse();
            FieldRange.select(); } }
}

function SetDelay() {
    setTimeout("runPostback()", 200);
}




 </script>
</head>
<body onload="getFocus()">
<form id="form1" runat="server">
<div>
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <Triggers>
            <asp:AsyncPostBackTrigger ControlID="TextBox1" />
        </Triggers>
        <ContentTemplate>
            <asp:TextBox ID="TextBox1" onkeyup="SetDelay();" runat="server"></asp:TextBox>
            <asp:GridView ID="GridView1" runat="server" DataSourceID="SqlDataSource1">
            </asp:GridView>
            <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:purchasing2ConnectionString %>"
                SelectCommand="SELECT [name] FROM [vendors] WHERE ([name] LIKE  @name + '%')">
                <SelectParameters>
                    <asp:ControlParameter ControlID="TextBox1" Name="name" PropertyName="Text" Type="String" />
                </SelectParameters>
            </asp:SqlDataSource>
        </ContentTemplate>
    </asp:UpdatePanel>
</div>
</form>

How do I make a Textbox Postback on KeyUp?

Solution 1:

Solution 2:

Related

Recent Posts