AJAX :: Set A Textbox's Value Before A Asynchronous Postback?
Mar 16, 2010
Is there any way can let me set a textbox's value before the asynchronous postback. but I don't want to add a handler for a control which caused that asynchronous postback, because there are too much control can cause that. I want to know if there is a client event would be caused before the postback.
I tried the event initializeRequest of PageRequestManager to do this, but it did not work, it seems like the request has been generated when this event was executed, the value i set in this event for textbox did not be sent to server.
here is a page I used to test
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> runat="server">
<script
[Code]....
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[code]...
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Oct 15, 2010
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[URL]
I have same problem, can anyone write a code project exemple
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Oct 15, 2010
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i have update panel at test.aspx
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Jan 4, 2010
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Jan 18, 2011
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<script type="text/javascript">
var pbControl = null;
var prm = Sys.WebForms.PageRequestManager.getInstance();[code]...
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Mar 6, 2012
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Oct 16, 2010
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<script type="text/javascript">
var xPos, yPos;
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prm.add_endRequest(EndRequestHandler);
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yPos = document.getElementById('Main').scrollTop;
}
function EndRequestHandler(sender, args) {
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document.getElementById('Main').scrollTop = yPos;
}
</script>
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Aug 26, 2010
Well I have a strange problem.I have a page with 2 DropDownLists on it and a custom web-user-control. The custom web user control has an UpdatePanel within it, and an Ajax Timer control within the UpdatePanel to periodically update a listing of stuff.When I "drop-down" one of the DropDownLists and hover over (not click on) an option while the Timer control within the UpdatePanel asynchronously posts back to the server, the DropDownList "autopostbacks" to the server!
I'm trying to figure out why an asynchronous postback would cause the DropDownList to act as if I selected/clicked on an option so that I can find a way around this issue.Now it's really simple to reproduce this problem. Create a Web User control called "TimerUpdatedListing"...this is the ASPX code markup for the web user control:
<%@ Control Language="vb" AutoEventWireup="false" CodeBehind="TimerUpdatedListing.ascx.vb" Inherits="MyNamespace.TimerUpdatedListing" %>
<div style="width: 150px; height: 150px; overflow: auto; border: solid 1px navy;">
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[code]...
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Jan 21, 2010
I use AjaxControlToolkit 30930. I use modalpopupextender with textbox control and I found that there is a comma append textbox value every postback. Are ther any solution for me. I don't want to use previous version because I need AsyncFileupload.
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Mar 19, 2010
I have a webform with two textboxes both with maskededitextender with date type, and a button.
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Sep 20, 2010
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Mar 4, 2010
i got a strange problem. my project was ok before implimenting ajax. i have just implimented ajax in one page only with Tabcontainer and updatepanels only nothing else. almost all controls are devided into different Tabs with respective update panels.
mostly it is working ok. but the problem is :
1. in some controls i am not able to write anything even the control is "Enabled=True" and focus is on the same control after partial postback.
2. and as soon as i press Tab control goes to Address bar.
3. some time tab key is also not working.
here some code :
[Code]....
Here the Logic :
as soon as i type inception date; expirydate is automatically calculated and focus should come to sumassured. after this it should allowed to enter sumassured amount, which is not allowing to write.
As soon as i change tab and come back to original tab then i can write values normaly.
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Mar 8, 2010
Hoping I have placed my question in the correct forum.
I am writing an application that simply updates a text box (contained in a AJAX UpdatePanel) via a thread. the eventual idea being that the textbox will be placed in the master page, and a thread will poll a table to check for status messages. 90% of the code works as it should, the only side that is not working, is physically updating the textbox. The value of the textbox is being updated, but it is not being reflected on the screen. When the text is updated in the textbox, the OnChange event is not firing (as it shouldn't), but I still need the textbox to be updated. The textbox is being updated prgramatically, and not by the user.
When the thread triggers, it just fires an event, which right now just updates the textbox with the current date time. I've tried a million and one different ways, but still no luck :( Anyone know where I am going wrong?
Here is my code:
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" UpdateMode="Always" runat="server">
<ContentTemplate>
<asp:Table ID="Table1" runat="server">
<asp:TableRow>
<asp:TableCell>
<asp:Label ID="lblThread1" runat="server" Text="Thread1"></asp:Label>
</asp:TableCell>
<asp:TableCell>
<asp:TextBox ID="txtThread1" AutoPostBack="true" runat="server"></asp:TextBox>
</asp:TableCell>
<asp:TableCell>
<asp:Button ID="btnstartThread1" runat="server" Text="Start Thread 1" onclick="btnstartThread1_Click" />
</asp:TableCell>
<asp:TableCell>
<asp:Button ID="btnStopThread1" runat="server" Text="Stop Thread 1" onclick="btnStopThread1_Click" />
</asp:TableCell>
</asp:TableRow>
</asp:Table>
</ContentTemplate>
</asp:UpdatePanel>
public partial class _Default : System.Web.UI.Page
{
private static clsThread1 _objObject1 = new clsThread1();
private static Thread _objThread1;
//****************************************
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
_objObject1.UpdateThread1Time += new EventHandler(UpdateThread1TimeEvent);
}
}
//****************************************
private void UpdateThread1TimeEvent(object sender, EventArgs e)
{
this.txtThread1.Text = System.DateTime.Now.ToString();
}
//****************************************
protected void btnstartThread1_Click(object sender, EventArgs e)
{
_objThread1 = new Thread(new ThreadStart(_objObject1.StartProcess));
_objThread1.Start();
while (!_objThread1.IsAlive) ;
}
//****************************************
protected void btnStopThread1_Click(object sender, EventArgs e)
{
if (_objThread1 != null)
{
_objThread1.Abort();
_objThread1.Join();
}
}
//****************************************
}
public class clsThread1
{
public event EventHandler UpdateThread1Time;
public void StartProcess()
{
while (true)
{
UpdateThread1Time(this, EventArgs.Empty);
}
}
}
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Oct 26, 2010
I have an ASP.NET TextBox with TextMode = TextBoxMode.MultiLine that is used within an AJAX Update Panel. The .Text value has been pre-set to a value that has multiple lines.
When using Chrome(7.0.517.41) or Firefox(3.6.11) working with the controls posted back value on the server the carriage return is lost if the user hasn't edited the pre-set value.
E.g.
Initial .Text value set when the page loads:
[code]....
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May 27, 2010
This is likely a n00b question, but I can't seem to find any info on how to solve it. Here's the scenario:
I have a Textbox and a RadioButtonList in an UpdatePanel, both with AutoPostBack turned on (they need to be, can't turn it off on the text box))
The user enters some text in to the textbox, then clicks one of the Items in the radio button list.
Because the textbox post back is executing, the radio button is losing the value that the user selected.
How can I workaround this?
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May 7, 2015
I saw article [URL] .... that is working fine
I have a page with multiple textbox multiline
When I apply your code for three textbox then it show only one editor and remain same as simple textbox and if i click on button it flickering ...
<asp:ScriptManager ID="ScriptManager1" runat="server">
</asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:TextBox ID="TextBox1" runat="server" TextMode="MultiLine"></asp:TextBox>
<asp:HiddenField ID="HiddenField1" runat="server" />
[Code] ....
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Jun 8, 2010
I have 2 textboxes and a submit button inside a .net composite server control. I tried to only postback when submit button is clicked. I set autopostback = false for both textboxes. But either one still trigger submit button's onclick event by hitting "Enter" inside textbox. How can I stop postback by enter key?
View 2 Replies
Apr 16, 2010
Could ASP.NET AJAX UpdatePanel could be used in ASP.NET asynchronous pages ? Could Page Methods be made asynchronous also ?
View 4 Replies
Mar 12, 2010
I am relatively new to asp.net. In My asp.net website, i have a method GetData(int id) which is called Repetitively, depending on id count, GetData is desinged to get data from sharepoint and sql server both. if the Id count is high say =10, my page load time increases because GetData is called 10 times and the page load time keeps adding up. so I want to ask, is there any way that this GetData() be called asynchornously or by the use of some thread, so that my page loads faster.
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Nov 23, 2010
Since i am fresher to .net, i m unable to handle asp.net. I have call asynchronous ajax call using XMLHTTPRequest and also use QueryString to filter Employee details.
I have following files:
1. Default.aspx code
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Task2._Default" %>
<%@ Register TagPrefix="uc1" TagName="SearchResult" Src="SearchResult.ascx" %>
[code]....
3. Ajax.aspx is empty in design
what should be the code in Default.aspx.cs when u take some text in textbox to search, OnClick of "ok" button there should'nt be any postback.
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Aug 20, 2010
first i'll describe my problem:
I have payment form with a clients dropdownlist that is populated from a database on form load with:
value field = clientIdtext field = nameId
<asp:DropDownList ID="selClients" runat="server">
</asp:DropDownList>
When user makes a payment, it's necessary to chose a client from selClients, and so i get the clientsId value and build my insert SQL query.
Until here, no problems.
The problem with my UI has started since i had a lot of clients been registered: My dropdownlist became huge and it's taking too much time to load it's contents on page load. Also the dropdownlist area is taking a large area from page screen.
So i tryied a solution with jquery autocomplete plug in. I put a textbox with autocomplete for client name and another hiddenfield to receive the clientId when user select a item.
That solves both problems:
No more large amout of data loaded on page loadThe dropdownlist doesn't take a large area from page screen
But it gave me another problem!
With a textbox, there is a possibility for wrong input client name. So if i don't have a valid clientId in hiddenfield, it will generate a database INSERT exception because it doesn't respect the client table constraint:
payment table REFERS client table
I'm trying to find kind of dropdownlist where the user can type text with autocomplete. Like this, the user will be able to select only data within the possibilities of the dropdownlist and i always will have a valid clientId.
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