I'm trying to create an asyncrhonous postback in asp.net using __doPostBack(), but I have no idea how to do it. I want to use vanilla javascript.
Something simple like a button click can cause the __doPostBack() event to fire. I'm just trying to learn how the mechanism works.
Im getting that error when try to call a __doPostBack on one of my pages, every page that i have in the project use __doPostBack function but in this particular page im getting that Javascript error.i was looking in the internet and the only thing i read is that this error happends when i have a unclose tag but i review the site and its ok.Error: __doPostBack is not definedSource File: htt://localhost:99/ProjectName/Disable.aspx
View 4 RepliesI'm sending a value (id) from javascript like this:
__doPostBack('',id)
and at the server side I get it like this:
var id = Request["__EVENTARGUMENT"];
the problem is that sometimes other controls also do stuff and the var id also get's value but not with the value I sent, but some control did.how do I send this value separately so that in var id only the value that I sent using js can be.
I'm having a problem with telerik RadGrid, I want to enable multiple row selection. I also want to go to the server whenever a row is selected or deselected. I created a javascript function to handle the Grid's client side events (OnRowSelected, and OnRowDeSelected). The functions look like this:
function onOperationRowSelected(sender, eventArgs) {
__doPostBack("<%=myControl.ClientID %>", "rowSelected:" + eventArgs.get_itemIndexHierarchical());
}
The other function is very similar, the only difference is that it sends the string "rowDeselcted" instead of "rowSelected".
On Page_Load I check to see if the request is a Post request using "IsPostBack" and if so, I check to see if it's a rowSelected or rowdeselected.
My problem is when I select a first raw on my grid, a Post request happens (which is expected), however, when I select the second row, a GET request is issued, which (obviously) will result in IsPostBack returning false.
What am I missing here?
i want to fire post back on page_load
i need to execute my control, whihc i can call on _postback()
how i can do
i am doing this in my client side to make my page load and update a message that is inside and update panel, i associate the keydown event of a textbox control to this javascript:
[Code]....
but the problem with that is if the user type fast the page will do a lot of postback, and i just wanna make the last one, how can i afford that??
I have a LinkButton that I need to perform a click on to cause a postback. The actual link target is:
javascript:__doPostBack('ctl00$c1$btnRefreshGrid','');
Clicking the link does perform the postback, as verified by a breakpoint in the code-behind. Also pasting javascript:__doPostBack('ctl00$c1$btnRefreshGrid','') in the address bar of the browser works with the same effect.
I've tried the following with no effect at all:
__doPostBack('ctl00$c1$btnRefreshGrid','');
$('#ctl00$c1$btnRefreshGrid').click();
$('#ctl00$c1$btnRefreshGrid').trigger('click');
eval($('#ctl00$c1$btnRefreshGrid').attr("href"));
I've tried using both <%= btnRefreshGrid.UniqueID %> and <%= btnRefreshGrid.ClientID %> to generate the selector.
I am raising an event from the javascript function using the below code.
javascript:__doPostBack('<%=lnkSaveBtn.UniqueID %>','');
The event fires when using the below URL
http://localhost:2000/myProjectName/Home.aspx
But when i deploy the project on the production server, it does not raise the event although i have checked that the function getting called but the event is not raised.
In short
* javascript:__doPostBack('<%=lnkSaveBtn.UniqueID %>',''); in javscript works using http://localhost:2000/myProjectName/Home.aspx
*javascript:__doPostBack('<%=lnkSaveBtn.UniqueID %>','');not works when using http://machinename/myProjectName/Home.aspx
I have tried using javascript:__doPostBack('<%=lnkSaveBtn.ClientID%>',''); but still does n't work.
Got really strange Firefox issue. Using the Microsoft __doPostBack javascript function in web forms page. Used for tab control, we have got each tab click calling the __doPostBack function. Works ok on my dev machine with all browsers but got a colleague who has an issue if he leaves the page idle for circa 3 -4 minutes. After this delay if he selects a new tab which calls the __doPostBack function the call to theForm.submit(); just hangs and get requested timeout. No .net calls are seen in Firebug. The __doPostBack event is called just theForm.submit() function just doesn't execute. If he does not have this idle time works ok. It is also ok for him on all other browsers.
View 2 RepliesI am getting an error on javascript when doing post back. The code is as follows:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" [URL]>
<html xmlns=[URL]>
<head id="Head1" runat="server">
<title>Untitled Page</title>
<script language="javascript" type="text/javascript">
function DoPostBack()
{
__doPostBack('Button2','My Argument');
}
</script>
</head>
<body>
<form id="form1" runat="server">
<input type="button" id="Button2" value="Press me" onclick="DoPostBack()" />
</form>
</body>
</html>
I am getting the following error: Line: 13 Error: Object expected I can't understand why this error is coming.
I'm trying to manually call the ASP.NET (3.5) javascript postback function __doPostBack from my javascript code. The problem is that the postback script block, that is normally rendered right after the beginning of the <form> tag (and the hidden fields), is occasionally rendered near the closing </form> tag. Is there any way to force it to be rendered near the beginning of the form tag? Also, how does ASP.NET decide when/where to render the postback client script block?
Edit > Additional Info: The javascript code resides inside a user control that references the __doPostBack function. The control itself does not contain any 'postback controls' that would call that function. (When I mention 'postback controls', I mean ASP.net controls that call the __doPostBack function and not the asp.net ImageButton and Button controls)
Based on what I've observed and @Brian's comment on the dependency of the postback script on the availability of 'postback controls' on the page, I've found that when the page contains controls that cause postback, the __doPostBack script block is rendered after the opening <form> tag and when there are none, it renders them near the closing </form> tag (or according to this it's not even supposed to be rendered). Now it would make sense for ASP.NET not to render the postback script if there are no controls that require it, but the apparent position of the script near the closing tag is the one that still eludes me. I haven't been able to find any documentation that suggests this behavior. All I've been able to find was this.
Add a 'postback control' and set its visibility to hidden via css (not the Visible property). eg. <asp:LinkButton ID="RequirePostBackScriptLink" runat="server" style="display:none;" /> (this is what I'm using) Add the control to the Page.RegisterRequiresPostBack and implement the IPostBackDataHandler interface.
Finally, as @Jonathan_Bates mentioned in his post, the proper thing to do is to wrap the reference to __doPostBack inside a function that is an event handler to load (or ready if you're using jquery). That way, there wouldn't be a need to depend on the actual placement of the __doPostBack script.
i have explicitly added __doPostBack() on Button onclientClick event .
[Code]....
When I am clicking the button the Page_Load is calling twice.
But if I am adding below code inside page load ,page load is calling only once on button click.
[Code]....
and return true is giving me again twice page load ,but adding return true or false in attribute.add code is giving the same result ,only one page load call.
[Code]....
I am not able to understand what is going on exactly I try to add __doPostBack in different way.
I have a web forms page with a button that involkes a __doPostBack callback to the page. I would like to invoke this manually - by "manually" I mean from outside the webpage, for example by using wget.
View 5 RepliesI have user control which on page and page contain mutiple tab, when i below is problem
my user control load on click of menu , but when 1st time page load my menu already so end user dont need to clcik,
but if menu not click my postback event not fired and give error
i want "="__doPostBack('RiskMapSubTab'" fire when my page load does not matter user clcik this tab or not
[code]....
I have a web forms page with a button that involkes a __doPostBack callback to the page. I would like to invoke this manually - by "manually" I mean from outside the webpage, for example by using wget.
View 3 RepliesI am calling a method with __doPostBack using the OnFocus event for the controls. However I need to update the values multiple controls when the server method executes. This actually causes on focus to keep firing. Looking for help. I tried using TextBox1.Attributes.Remove("onfocus") and then adding it the javascript after processing but it still keep looping. Here is a sample using to textbox's for simplicity:
HTML
[Code]....
Code Behind:
[Code]....
In my javascript, I have the following line:
__doPostBack('MyPanel', MyParam);
In my code behind, I use MyParam to query a database and bind the result to a gridview that's inside the MyPanel updatepanel. The updatemode of the updatepanel is set to conditional and in the postback part of the code I have MyPanel.Update();
The updatepanel works fine when I'm doing sorting and paging; only the panel is refreshed. However, when I trigger the updatepanel with my javascript, I see the traffic in firebug showing that the entire page is being refreshed.
I have explicitly added __doPostBack() on Button onclientClick event.
<asp:Button ID="Button1" runat="server" Text="Button"
OnClientClick="__doPostBack('Button1','')"/>
When I am clicking the button the Page_Load is calling twice. But if I am adding below code inside page load ,page load is calling only once on button click.
Button1.Attributes.Add("onClientClick", "__doPostBack('Button1','')");
Again if i add with return false it is giving me it calling only once page load on click
<asp:Button ID="Button1" runat="server" Text="Button"
OnClientClick="__doPostBack('Button1','');return false;"/>
and return true is giving me again twice page load ,but adding return true or false in attribute.add code is giving the same result ,only one page load call.
Button1.Attributes.Add("onClientClick", "__doPostBack('Button1','');return true;");
I am not able to understand what is going on exactly when I tried to add __doPostBack in different way.
I'm trying to parse a page that has different sections that are loaded with a Javascript __doPostBack() function.
An example of a link is: javascript:__doPostBack('ctl00$cphMain$ucOemSchPicker$dlSch$ctl03$btnSch','')
As soon as this is clicked, the browser doesn't fetch a new URL but a section of webpage is updated to reflect new information.
What would I pass into a urllib function to complete the operation?
why the ValidateRequest dose not work when html tags had sent by __doPostBack method in javascript.
[Code]....
why the ValidateRequest dose not work when html tags had sent by __doPostBack method in javascript.
<script>
[Code]....
</script>
I'm developing a Asp.net server control (inherited from DataBoundControl) and I have just one button inside it for now which is created in CreateChildControls override. Even though this button have Click event assigned in rendered page the button don't have onclick event with __doPostback or something similar. Am I missing something?
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