AJAX :: Avoiding Postback Using Updatepanel?

Sep 24, 2010

avoiding postback using updatepanel

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AJAX :: How To Trigger Updatepanel Postback From Another Updatepanel

Mar 4, 2011

I have a web user control with one updatepanel (pnlUpdate_2), some controls and one apply button. I display the web user control as a modalpopup in my default page. In my default page i have an updatepanel (pnlUpdate_1) with a gridview and I modify that gridview with the apply button of the web user control. The web user control is for made a custom search of the gridview data. I have a problem with both updatepanels. If I set the updatemode as always in one of them (pnlUpdate_1) and the other as conditional (pnlUpdate_2), the pnlUpdate_1 make a postback in the pnlUpdate_2; I'm not an expert on this but I think that's why the pnlUpdate_2 disappear and reappear after postback of some controls in that updatepanel (not the apply button, it close the modal after postback). I try all the combinations and the problem persists. So I put both updatepanels as conditional and in some way it works; now the problem is that when I click the apply button in pnlUpdate_2 to modify the gridview in pnlUpdate_1 the pnlUpdate_1 not made the postback I get the pnlUpdate_2 postback when I use some control inside the pnlUpdate_1.

How can I postback the pnlUpdate1 from pnlUpdate_2 with the apply button?

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AJAX :: Forcing Full Postback In UpdatePanel

Apr 19, 2010

I have basically the following structure set up :


I am aware that a FileUpload requires a full page postback. I read the article http://www.4guysfromrolla.com/articles/090209-1.aspx[^]I tried to install a PostBackTrigger programmatically to get a full postback only on the ImageButton1 control. All other postbacks must be partial. (GridView sorting, paging, ...)In code behind I do :


The above code does not seem to install a full postback only for the ImageButton1, so the file upload fails. How can I make this work ?

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AJAX :: GridView In UpdatePanel With Full Postback

May 13, 2010

I have got the following gridview with a UpdatePanel and approve and save button in each row. How do I create a full postback if approve button is click and asyncPostback if save button is click.

<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<asp:PostBackTrigger ControlID="btnApprove" />
<asp:GridView ID="gvApproval" runat="server" CssClass="gridview" BorderColor="#E5E5E5"
Width="98%" AutoGenerateColumns="False" DataKeyNames="NewProcessId" OnRowCommand="gvApproval_RowCommand"
OnRowDataBound="gvApproval_RowDataBound" OnRowEditing="gvApproval_RowEditing">
<asp:TemplateField Visible="False">
<asp:Label ID="lblApprovalId" runat="server" Text='<%# Bind("ApprovalId") %>' Width="1px"></asp:Label>
<asp:TemplateField HeaderText="Comment">
<ItemStyle Width="80%" Wrap="True" />
<asp:Label ID="lblComment" runat="server" Text='<%# Eval("Comment").ToString().Replace("
", "<br />") %>'></asp:Label>
<asp:TextBox ID="txtApprovalComment" runat="server" CssClass="textMessageBox" TextMode="MultiLine"
Width="98%" Visible="false"></asp:TextBox>
<asp:RequiredFieldValidator ID="rfvApprovalComment" runat="server" ControlToValidate="txtApprovalComment"
Display="Dynamic" CssClass="textErrorMessageNormal" ErrorMessage="Comment is required before approval"
ValidationGroup="Approve"></asp:RequiredFieldValidator><br />
<asp:ImageButton ID="btnApprove" runat="server" CssClass="spbutton" Visible="false"
ImageUrl="~/Images/ButtonApprove.gif" ValidationGroup="Approve" CommandName="Approve">
<asp:ImageButton ID="btnSave" runat="server" CssClass="spbutton" Visible="false"
ImageUrl="~/Images/ButtonSave.gif" ValidationGroup="Save" CommandName="Save">
<PagerStyle CssClass="pager" />
<HeaderStyle CssClass="gridtableHeading" Wrap="False" />
<AlternatingRowStyle CssClass="alternateRow" />

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AJAX :: UpdatePanel Is Not Working - It Always Postback Instead Of Callback?

Jan 21, 2010

I have updatePanel in my ASP.NET 2.0 (migrated from ASP.NET 1.1) web app. It doesn't work as it always postback instead of callback. I already set<xhtmlConformance mode="Transitional" /> but still not working. Previously, it just working.


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Ajax UpdatePanel Controls Full Postback

Mar 7, 2011

I have a webform which has an updatepanel with a combobox, add button, delete button and a table. The functiion of the two buttons is to add or delete table rows. However, the table is getting cleared everytime the combobox item is selected. Is there anotherway of retaining the table contents?The code for the updatepanel is:

<asp:UpdatePanel ID="UpdatePanelTreatment" runat="server" UpdateMode="Conditional">
<asp:PostbackTrigger ControlID="cboTreatment" />
asp:PostbackTrigger ControlID="btnAdd" />

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AJAX :: Scrollbar Is Reset By Updatepanel Postback - How To Fix It

Jul 20, 2010

I have an Usercontrol which has a update panel that being postback by a timer, and it is nested in a parent page which has its own update panel. Every time that the update panel in UserControl cause a postback to server my main page's scrollbar being reset to top or buttom of the page. I enabled viewstate of parent page but nothing, and when enable parent page's MaintainScrollPOsitionOnPOstback it cause a problem for Usercontrol updatepanel postback !

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AJAX :: UpdatePanel Postback And Resulting ViewState?

Sep 10, 2010

I'm reading about the UpdatePanel and how it interacts with controls inside & outside of it.

My understanding is that the usual ASP.Net pipeline takes place when posting from within an UpdatePanel-- Page load etc all fire off as normal-- except when the prerendering stage is reached. In that case the ScriptManager does a final check and only renders those controls within the UpdatePanel and skips the rest. That's my understanding at least.

Sounds good, but for argument's sake let's say I have a TextBox located outside an UpdatePanel. If a postback occurs from within that panel, the TextBox's properties can still be set in the page load method, but those changes will not take effect. (normally; it is possible to postback the entire page from an UpdatePanel)

Is that correct? What happens to that TextBox's ViewState in this instance? Is it updated based on what happened to it in the page load method or is that modification tossed out because it wasn't in the UpdatePanel?

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AJAX :: Updatepanel And Double Postback On Page

Feb 7, 2011

i am using an updatepanel and loading diffrent user controls(.'ascx') in to it by the server side.

in every user control i have diffrent controls, max 4 controls in one user control.

no matter what control i am using when ever i cause an event from any control on the user control

the page postback twice and the item/option/text ichoose or checked or wrote in the control disappers, and the control

that caused the event returns the his original position like no change was made to it.

does anybody have any ideas or have a suggestion what causes thes double postback.

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AJAX :: UpdatePanel GridView Paging Postback?

Dec 15, 2010

I have a simple form containing a gridview that displays some records. Everything works fine but I was hoping to wrap the grid view inside an updatepanle to prevent a full postback (flickering) when paging.

It doesn't seem to matter what I try, paging always causes a full postback which causes the page to flicker. What am I doing wrong?

Here's my markup:


And here's my aspx code:


<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true"></asp:ScriptManager>

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AJAX :: Cannot Display Panel In UpdatePanel After Postback

Jan 17, 2010

onPageLoad event , i have Make MyPanel.Visible=false;

when some buttons Clicked the UpdatePanle is Updated and then Mypanel.Visible=true;

but the MyPanel still not visible , what i can do to make it visible?

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AJAX :: Margin On Div Removed After Async Postback With UpdatePanel

Sep 15, 2010

I have a series of div's inside an update panel, these divs have a margin-bottom defined in css. In IE8, when I do a async postback these margins are all removed. All the other styles are fine. If I turn on compatibility mode this does not happen. In Google Chrome the margins are maintained correctly after the async postbacks.

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AJAX :: Updatepanel Asyncpostback Triggering A Full Postback

Apr 1, 2011

We have a fairly complex content management system where we start with a blank page with just an updatepanel, then in the init function add all the controls, this all works fine.The problem I'm having is that when the loginform control logs in, we get data back from the server that looks like:

<span id="ctl00_ContentPlaceHolder1_DEBUG"></span><div id="ctl00_ContentPlaceHolder1_content">
<div class="contentWrapper">
<div class="form">
<div id="errors">
<div id="ctl00_ContentPlaceHolder1_ctl03" style="display:none;">

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AJAX :: Dropdownlist Postback Cause AsyncFileUpload Broken (both In UpdatePanel)?

Apr 9, 2010

I have dropdownlist autopostback and AsyncFileUpload both inside UpdatePanel After I selected Item in dropdownlist to postback,AsyncFileUpload is changed it's size and it can't upload After Dropdownlist postback

This is my code


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AJAX :: Textbox Not Writable After Partial Postback Of Updatepanel?

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 :


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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AJAX :: Timer Results In Updatepanel Gives Full Postback

Jan 19, 2011

I have a quite strange situation where I have the following code:


This gives a quite strange result: Every 5s my whole page gives a full postback. When I comment in (activate) the asyncpostbacktrigger, the updatepanel does not give a full postback. In the PlayerItems_ItemDataBound I have the following code (which, I do think, do not matter):


When I create a NEW updatepanel, ItemsUpdatePanel1, it does not fire a full postback without the timer. I can even start copying items from ItemsUpdatePanel to ItemsUpdatePanel1, and suddenly the full postbacks happen. I tried 2 seperate times, and they started happening at different times. I simply want the UpdatePanel NOT to give a full postback, even without a timer.

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AJAX :: Button Not Preserving ID After Partial Postback In Updatepanel?

Oct 8, 2010

I've created a dynamic button from another control outside of the update Panel. The button is given an ID and such. When the button is click, a postback occurs and I've re-created this button during Page_Init, Page_PreLoad, and Page_Onload and NONE of them is preserving the value.

The only way for me to find the control was to look at the Page.request.form's allkeys and compare the string with a any text string that contains: Button. Because I ID'd teh button as: ButtonRow_0Col0. But the actual ID is null. However, when traversing through page.request.form, the allkeys shows that ID with no problem.

So how come the actual ID is lost after a partial postback yet, the page.request.form's allkeys can pull out its allkey's value??

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AJAX :: Gridview SelectedIndexChanged Causes Full Postback Although It's In An Updatepanel?

Feb 3, 2010

I have an gridview inside of a multiview inside of an updatepanel. I create all this dynamically with code (AutoGenerateSelectButton=true).If the SelectedIndexChanged event is fired, there is a full postback. How can I avoid this?

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AJAX :: UpdatePanel - UpdateProgress Only Displays On Initial Postback?

Jul 30, 2010

In a nutshell I have an UpdatePanel with an UpdateProgress item, first postback checks for warnings, if there are any they will be be displayed to the user as a JavaScript 'confirm' box. If the user clicks OK the next postback occurs to commit the change.

The UpdateProgress loading notification appears on the first postback but not on the second, even though both of them function correctly. The buttons that trigger both postbacks are async postback triggers in the update panel, and both are inside the ContentTemplate.

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AJAX :: Watermark Text Disappear When Updatepanel Is Postback?

Apr 9, 2010

I have 2 "Updatepanel" controls. Each contains a textbox linked to a "TextBoxWatermarkExtender", and a button. When I click on one of the buttons without to enter any text, all the watermark text disappear on BOTH updatepanel when they should remain visible.


How can I avoid the waternmark text to disappear when I click on the button?

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AJAX :: Chart Inside UpdatePanel And RadioButton PostBack?

Jan 27, 2011

My problem is very simple: I have a chart inside an UpdatePanel (I'm using AJAX) and 2 RadioButton in which AutoPostBack=true.When I click on my "generate chart" Button, the chart is well painted on the page but the AutoPostBack of my 2 RadioButtons seems to stop firing. That is to say, after painting, If I click on my RadioButton the postback doesen't works!I need to set some kind of trigger related to the chart?

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AJAX :: JQuery Plugins Vanished After UpdatePanel PostBack

Apr 20, 2013

I have used jquery to design my control but when i place the controls in update panel then their design got disappeared i.e. the jquery got vanished. can u plz tell how can i resolve this issue.

I have to use update panel otherwise on selecting value from dropdown or checkbox then whole page get post back.

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Ajax - Cannot Catch An Error On As Sync Postback (page With Updatepanel)

Feb 5, 2010

I use an updatepanel and I register a handler for endRequest to catch errors: Sys.WebForms.PageRequestManager.getInstance().add_endRequest(EndRequestHandler); On the server an exception is thrown to test the client side. The problem is that in IE and FireFox EndRequestHandler is never called! It works as expected in Opera and Safari. On a simple page with few controls it works as expected in all browsers. What I found out with Firebug is that the response is Content-length: 67, but there is no response (empty tab for response)! The expected response is 53|error|500|Object reference not set to an instance of an object.|

I have not debugged the ajax library precisely but what I have seen is that some code runs to prepare for pageLoading event (maybe because it cannot detect the error?), but there is no information for updatepanels from the response and an error occurs trying to use an object for updatepanels which is null. The error is caught by a try-finally block.

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AJAX :: TabContainer Inside A Updatepanel Causes The Browser To Postback Twice While First One Is Aborted?

Dec 2, 2010

When I want to optimize my tab container for network traffic, I faced a rare problem.

When first time the page is requested the content in the first panel is visible. the other panel content are invisible. When user switches the tab i am setting the panel visible and update the updatepanel. this works fine after i have put the tab container inside a update panel and set the update mode conditional and children as trigger as false. But when i include the tab container inside an update panel and change the tab in the browser, i see two postback from the browser in firebug net traffic window. THe first postback status is displayed as aborted. Eventhough the functionality is working correct.

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AJAX :: UpdatePanel Doesn't Postback Neither Full Page Nor Partially?

Apr 28, 2010

here is my simlified code default.aspx;

<script runat="server">
Protected Sub GridView1_RowCommand(ByVal sender As Object, ByVal e As GridViewCommandEventArgs)
Dim strFirstName As String = DirectCast(GridView1.FooterRow.FindControl("txtCompanyName"), TextBox).Text()
If e.CommandName = "Add" Then
companiesGridViewSDS.InsertParameters("CompanyName").DefaultValue = strFirstName

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