Maintain Postback With WebForm_DoCallback?

Oct 3, 2010

Does anyone know how to maintain postback while calling WebForm_DoCallback? it always set the vertical scrollbar of the page to the very top.

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I created an application that grabs jokes from a database on start and shows the first joke on screen. Now when we hit the Next button it should show the second joke. When I first grab the jokes, I put them in a globally declared datatable. To show the first joke I'm doing:

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[Code]....

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Using VS2008, .NET 3.5, and C#. The page contains (among other things) a dropdownlist and an objectdatasource. The Page_Load event fires the objectdatasource's Select event. The Selected event iterates through the returned datatable, feed each row into a ListItem, checks to see if a certain column is True or False and, if true, changes the styling for that row to color:red. Finally, the listitem is bound to the dropdownlist. The end users sees all of the dropdownlist items that are false in black and the items that are true are in red. Works perfectly. However, as soon as any item is selected, the page does a postback and the font colors in the dropdownlist revert to the default black. Is there a way, other than rerunning the method that iterates through table and creates the listitems, of maintaining the coloration of the items? Is there a ViewState setting or something?

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[Code]....

[Code]....

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[Code].....

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[URL]

I have got the gridview to populate from my own datatable and there are quite a few results in the table. As a result I have a scroll bar on my gridview.

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[Code]....

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Web Forms :: How To Add Multiple Textboxes At Runtime And Maintain Them After Postback

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I'm trying to make a form that could have one or multiple textboxes. I have a textbox and a button to add additional textboxes.

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Apr 19, 2010

I have "n" <tables></tables> on my page and each <table> has One(1) <asp:CheckBox.. Enable ='true"/> and "x" <asp:TextBox Enabled="false"..>. Each Table looks as follows

[Code]....

When I click checkbox, it calls javascript function and enables textboxes (I have added onclick attribute to checkbox). Page also has <asp:Button ...Text="Submit"/> whcih actually grabs the data from the textboxes on the page and send it to the databse. Here is the Onclick event of the <asp"button../>

[Code]....

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How do i Maintain ListBox scrollbar position on postback ?

further details*

Listbox is populated from database size can change.

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ScrollBar position resets on postback.Is there anyway to maintain position ?I am adding UserControl(s) dynmically to the page, therefore I want to maintian positon (always maintain position at the end)Following is my .aspx file (Just to show where is the asp:panel and User controls)

[Code]...

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I have an asp.net listbox with 15 rows and auto postback when the selected item is changed. This works as expected but, when the form is re-loaded, IE scrolls the list so that the last selected item is now the top visible item in the list. This produces a confusing/jumpy effect for the users and makes the listbox more difficult to use than it needs to be.

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I am using .Net 3.5 but no AJAX.

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I'm using five FileUpload controls on a single web form. Besides allowing the user to upload a file I also am collecting user data. Problem I run into is during the server side validation if any of the user data is invalid on a post back when content it redisplayed the FileUpload controls loose the client url that was selected when browsing. How can I keep that path or set the pathing on the control so they do not have to keep rebrowsing for the files on data validation errors? Right now breaking up the two form sets user data and file upload into two pages is being frowned upon and requirments would like it to be on all one page.

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I have a abc.aspx page having some control like (drop downs, text boxes), i am filling a grid based on selected items in the drop downs and date selected from the ajax calender extender control attached to the from data and to date text boxes.

Inside grid there is a link which redirects to bcd.aspx, this page (bcd.aspx) is having a back button to redirect abc.aspx.

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I have the following user control:

[Code]....

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AJAX :: Maintain State Of FileUpload Control And Preserve File Across PostBack

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My <input id="FileUpload1" name="FileUpload1" type="file"> and country dropdown both are inside update panel , now on selectedindexchanged it do postback , which i am triggering in update panel to avoid page refresh .

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I tried some methods to maintain scroll position on postback but none worked they are

1) In page declaration MaintainScrollPositionOnPostback="true"

2) In Code behind  Page.MaintainScrollPositionOnPostBack = true

3)In web.config file in <system.web>  section <pages maintainScrollPositionOnPostBack="true" />

I am not using any updatepanel.

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Web Forms :: Error WebForm_InitCallback And WebForm_DoCallback Is Not Defined?

Apr 13, 2010

i have developed a simple form which have only one button and when user click on button then just server datetime will be shown by icallback. few days back it was working but now i saw it is stop working. i am running the program from VS2005 IDE. i just can not understand why it is not working. i am getting two error and the errors are 1) WebForm_DoCallback is not defined 2) WebForm_InitCallback is not defined please help me how to fix this error. here i am giving my code html ----- <%@ Page Language="C#" AutoEventWireup="true" CodeFile="BasicCallBack.aspx.cs" Inherits="BasicCallBack" %>

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AJAX :: WebForm_DoCallback Function Generated From The Page?

Jan 3, 2011

I'm having a strange problem with the WebForm_DoCallback function,generated from the Page.ClientScript.GetCallbackEventReference method.I recently midrated an ESRI web application from a previous version to the new 10.0 version,and so had to install it in a different server (Windows Server 2008) and had to update allot of web.config dll references. Everything worked fine, except for the this specific callback function,'WebForm_DoCallback'.

Now it doesn't do any callback at all,and the strange this is,that when i try to print it out in javascript with the alert method,instead of appearing an alert box with all of the code of the 'WebForm_DoCallback' function,as is is declared in the WebForms.js file inside the System.Web.dll(I used reflector.net for that),the only thing that gets printed is:

function () {
return b.apply(a, arguments);
}

I suspect the function is being overriden by another scriptresource.axd, but i'm not sure.I'm starting to loose it with this one.Everything works the same,except for this one.Maybe the problem is in the web.config file,but i can't determine where.

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Forms Data Controls :: How To Maintain The Selected Item In Dropdownlist (in Template Field) In Gridview After Postback

Mar 25, 2010

i have a gridview which consists of databounds and dropdownlist control. When I press the Add Grid Row Button, it will insert a row. Now my question is, if the user selected an item in dropdownList in the firstrow and the user click the AddGridRowBtn Again which will generate the 2nd row, how would i maintain the selectedItem in the dropdownlist after postback?

Source For Gridview:

[Code]....

Add Row Code

[Code]....

[Code]....

And For Grid Row Created Event

[Code]....

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