AJAX :: How To Avoid Having The Page Jump To The Top And Then Back Down Again On The Postback
Feb 13, 2011
I have an AsyncFileUpload with an image control to show a preview of the pic that is uploaded. Everything works fine, however on the postback from the asynchFileUpload the page jumps to the top of the page and then after a second or two it goes down to the proper scroll position. What can I do to avoid having the page jump to the top and then back down again on the postback ?
[Code]....
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Apr 15, 2010
I am using ModalPopupExtender of Ajax Control Toolkit(v2.0.50727) as shown in the following way.
The problem iam facing is whenver i try to show the Popup ,Postback of entire page is happening which is cauisng lot of performance issues.
how to avoid the post backs when using ModalPopupExtender ..
<asp:UpdatePanel
ID="upmodal"
UpdateMode="Conditional"
runat="server">
<ContentTemplate>
<asp:Panel
ID="pnlCmnSrc"
runat="server"
CssClass="modalPopup"
Style="display:
none">
<table>........
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Nov 10, 2010
From one of my webpage, I am opening up another form as ModalDialog, and on this form, I have a Grid, Treeview and some other controls.
[Code]....
I have some code on click of Treeview Node, I fill out other data in Grid on click of Treeview Node.
Now the problem is when page posts back ( on click of Treeview Node ) , page flickers once during filling up data in Grid.
Basically whenever page.ispostback is true, page flickers, Now I want to avoid this.
I have to keep "SmartNavigation="false"" on this page because of some of the Treeview Problems.
Specifically on Node click of Treeview and on Update button press.
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May 7, 2015
Here is the sample code am trying.
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server" EnablePartialRendering="true" />
<div>
<asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="conditional">
<Triggers>
<asp:PostBackTrigger ControlID="Button1" />
[Code] ....
This upload is working. But why the page is getting refreshed? this is not partial post back and instead it 's full post back. i have read the articles for the fileuplaod with issue inside the update panel. is there any way to achieve this asynchronous upload on button click?
I don't want to use the Ajaxtoolkit Asyncupload because that will upload (Ref : [URL] ....] the moment when we seelct the file itself which i don't want to do that. i need to do on the button click event.
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Feb 24, 2011
I have three cascading dropdowns on my web page and they work fine. The issue I am facing is that there are other controls on the page which cause a postback and with each postback the cascading drop downs are being re-populated (service methods are called) which is becoming a performnace issue.
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Mar 9, 2011
I have a GridView control inside one Update Panel and a detail section inside another Update Panel. Initially, the detail section is hidden and when a GridView row is selected, the Detail panel becomes visible. Everything works fine except that if the GridView contains more rows and covers most of the user's screen, screen doesn't shits to the start of Detail section.I can use anchor but was just wondering if there is any other way of achieving this. Also the Detail section has multiple nested Update Panels and if I use anchor, then any of the child Update Panel's update will move the screen to the beginning of the detail Section.
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Aug 3, 2010
I have a strange problem that I don't understand about DataPager. After changing the page set (pages 6 - 10 for example), and clicking on a page (6, 7, 8, 9 or 10), it will displa to the first set of pages counting from 1 again.
Let me explain. I have a ASP.Net page with Listview and DataPager.
<asp:ListView ... DataSourceId="EntityDataSource" DataKeyNames="id">
<LayoutTemplate>
<asp:DataPager runat="server" ID="DataPager1" PageSize="15">
<Fields>
[Code].....
All this works, but the problem is that the set of pages will not remember during postbacks. Let me explain this.
By first request of page, the pages show:
<< 1 2 3 4 5 ... >>
By clicking the ..., the next set of pages will be displayed (and also the data of page 6 will be displayed)
<< ... 6 7 8 9 10 ... >>
But when I click on page 7 to 10, the pages text will display the first set of pages 1-5.
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Oct 9, 2010
i have 4 dropdownlist..state,district,place,product..where we have to select the product depend on state ,district ,place and product and there is search button for search particular product where iam using gridview to dipslay particular product deatails. i do not want to do auto past back eventfor page when i select dropdownlist...i tried using ajax but still i cant get through..i tried this code. how to use ajax for 4 dropdownlist & 1 button so that i can dispaly product deatails.
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Jan 6, 2011
How to avoid Model popup disabled on postback? I have a dropdown list in model popup control with autopost back="true". On post back am getting customer name. But on post model popup get disabled
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Feb 19, 2011
I have a Username and Password field on webform and a Submit button.Username ia validated through database on button click.Each time when i click on submit button and if Username already exist then my password gets to be removed due to postback.Please give me some solution so that when i just defocus my username field it will automatically check and display message if it exists.Please donot give Textbox ontextchanged event with update panel in conditional update mode because it will not work for me because i am using devexpress tools on my webforms.
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Mar 4, 2010
I am using datalist and used custom paging for that but on page index changed there is full postback..because i am sending the values through querystring just have a look to this link
[URL]
i want to remove this postback...
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May 7, 2015
I have image button in my page below is code
<asp:ImageButton ID="IMGmanage1" runat="server" onclick="IMGmanage1_Click" ImageUrl="~/image/viewpro.png" />
protected void IMGmanage1_Click(object sender, ImageClickEventArgs e)
{
Response.Redirect("view.aspx?BehCode=" + Request.QueryString["BehCode"]);
}
but when I click on image button below error happen:Invalid postback or callback argument. Event validation is enabled using <pages enable EventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.ArgumentException: Invalid postback or callback argument. Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.
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Mar 8, 2010
I've got a bit of a problem UpdatePanelAnimationExtenders. Here's an example of the code structure I have:
[Code]....
Now here's my problem. When dd1 triggers the postback both dd1 and dd2 get disabled (instead of just dd1) and after the request is complete only dd1 gets enabled back. The behaviour is also true the other way around (if dd2 triggers the postback both dropdowns get disabled but only dd2 gets enabled back). I'm not really sure what to make of this.
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Feb 4, 2010
I have a simple question - I use update panel with custom server control inside. I call __doPostBack from javascript and RaisePostBackEvent on the server fires (I implement IPostBackEventHandler).This is client to server call. Could I return data back to the client (after this partial postback)? What is the best way to achieve this?
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Feb 22, 2011
I'm having many child pages under a master page. When ever i click "Enter" button from my keyboard from the child page
1. A postback happens and the page is redirected to some other page
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Nov 29, 2010
I want to avoid page refereshing or loding with the of jquery ajax. Here i am attatch my asp page code.
[Code]....
In this page I am trying to use jquery ajax on page loding but it does not give response .
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Feb 2, 2010
I am using ajax calendar control, i can only go month by month when the arrows are clicked.is it possible to open a year combo box to jump to specific years months.If i want to put a date of 2012, i will have to click almost 24 times to get to 2012 year.
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Jan 24, 2010
i am using ajax calendar in my project but i can only navigate month by month, jump to specific year is it possible is it possible to jump to specifuc year or navigate year by year option via arrows.i see arrows going month by month.
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Apr 12, 2010
In a page I use prettyPhoto (a lightbox clone) that open a modal window showing an image when I click on a link with rel=prettyphoto. So I have:
<a href="fullresimage.png" rel="prettyPhoto">click here</a>
everytime I click on the link a postback is fired (IsPostBack = false). Can I avoid this? I have a counter on the page and everytime a pic is showed this is recognize as a full page load (i.e. increment counter) as IsPostBack = false!
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Oct 15, 2010
When an asynchronous postback happened inside update panel, another postback happens also for MasterPagenot only update panel embedded page .I want to prevent this MasterPage postback . is this possible ?think like i have a MasterPage and another page which is test.aspx which is content page of MasterPagei have update panel at test.aspxwhen asynchronous postback happens at this test.aspx update panel it also loads
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Sep 20, 2010
I have the folllowing DDL on a 2 tabbed Ajax tabbed container. The DDL is on the 2nd tab, the problem I am finding is that; when a user selects a value from the DDL the focus is jumpint to the 1st tab and not remaining in position as requested.
<cc1:TabPanel
runat="server"
HeaderText="Current Membership Stats"
ID="CurrentMembership">
[Code]....
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Feb 11, 2011
I am using asp treeview with checkbox for the leafnode. And when that check box is checked controls are creating dynamically in aspx.cs page.
When check box is checked the entire page is getting refreshed, How can I avoid that.
Following is the code of aspx
<asp:TreeView id="trvSource" CssClass="Treeview" ForeColor="White"
runat="server" KeyboardEnabled="true" CollapseImageToolTip="Collapse"
ExpandImageToolTip="Expand" Font-Size="10pt" ShowExpandCollapse="true"
ExpandCollapseImageWidth="15" ExpandCollapseImageHeight="15" ShowLines="false"
SpacerImageUrl="spacer.gif" ItemSpacing="0"
NodeIndent="10" EnableViewState="true" EnableClientScript="true" Font-Names="Cambria,Helvetica Condensed,Verdana, Arial, Helvetica, sans-serif"
onclick="postBackByObject(event)" AutoPostBackOnNodeCheckChanged="true"></asp:TreeView>
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May 25, 2010
This is what I have implemented, for further code, how to send the text of the text box to the server to store in variable or database without post back? It can be done by using Ajax and update plane, but I would like to implement it using a JavaScript script.
<div id="CommentID" style=" width:30%; height:30%">
<asp:Button ID="Button1" runat="server"
Text="Comment"
OnClientClick="visibleDiv('id1'); return false;" />
<div id="id1" runat="server" style="visibility: hidden; background-color:Green; width:100%; height:100%">
<asp:TextBox ID="TextBox1" runat="server"
AutoCompleteType="Disabled" Rows="3"
TextMode="MultiLine" Width="98%">
</asp:TextBox>
<asp:Button ID="Button2" runat="server"
Text="Post"
onclick="Button2_Click" />
<asp:Button ID="Button3" runat="server"
Text="Cancel"
OnClientClick="visibleDiv('id1'); return false;" />
</div>
</div>
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Jan 26, 2010
so I'm trying to get this dropdown thing to work but it's not working... I want the page to jump to the state on the SAME page once the USER releases on the desired state within the dropdownlist box.
HTML
<asp:DropDownList ID="ddltest" runat="server">
<asp:ListItem value="AL"> Alabama </asp:ListItem>
<asp:ListItem value="AK"> Alaska </asp:ListItem>
<asp:ListItem value="AZ"> Arizona </asp:ListItem>
<asp:ListItem value="AR"> Arkansas </asp:ListItem>
<asp:ListItem value="CA"> California </asp:ListItem>
<asp:ListItem value="CO"> Colorado </asp:ListItem>
<asp:ListItem value="CT"> Connecticut </asp:ListItem>
</asp:DropDownList>
<!-- New State -->
<a name="WY" id="WY"></a>
<div>Wyoming</div>
CODE BEHIND
protected void Page_Load(object sender, EventArgs e)
{
ddltest.Attributes.Add("onchange", "window.location.href = path.options[path.selectedIndex].value;");
}
}
}
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Jul 15, 2010
I've been dealing with an AJAX issue for some time now and I can't seem to find an answer anywhere. When I'm debugging and stepping thru my code it will jump into disassembly looking for a toolkit file. If I fit f5 I can continue debugging, but this happens often.
The latest one is:
Address: AjaxControlToolkit.ExtenderControlBase.ExtenderControlBase()
--- c:UsersswaltherprojectsaspNetAjaxReleases30930AjaxControlToolkitSourceAjaxControlToolkitExtenderBaseExtenderControlBase.cs
I setup the toolkit by adding a reference to AjaxControlToolkit.dll There's a line at the beginning of the markup...and everything appears to work outside of the debug issue.
[Code]....
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