What's The Official Microsoft Way To Track Counts Of Dynamic Controls To Be Reconstructed Upon Postback

Dec 21, 2010

When creating dynamic controls based on a data source of arbitrary and changing size, what is the official way to track exactly how many controls need to be rebuilt into the page's control collection after a Postback operation (i.e. on the server side during the ASP.NET page event lifecycle) specifically the point at which dynamic controls are supposed to be rebuilt? Where is the arity stored for retrieval and reconstruction usage?

By "official" I mean the Microsoft way of doing it. There exist hacks like Session storage, etc but I want to know the bonafide or at least Microsoft-recommended way. I've been unable to find a documentation page stating this information. Usually code samples work with a set of dynamic controls of known numbers. It's as if doing otherwise would be tougher.

Update: I'm not inquiring about user controls or static expression of declarative controls, but instead about dynamically injecting controls completely from code-behind, whether they be mine, 3rd-party or built-in ASP.NET controls.

View 1 Replies


Similar Messages:

MVC :: Is Microsoft.Web.Helpers An Official Library

Nov 15, 2010

is the NuGet downloadable package Microsoft-Web-Helpers an official Microsoft library?

View 8 Replies

C# - How To Track Event From Previous Postback

Jan 24, 2011

I have a requirement to check for a certain condition on postback before redirecting (Response.Redirect) to another page.

Note... I cannot use JavaScript to detect whether or not to confirm (this is also a requirement) :s

Pseudo:

[code]....

If the showConfrim flag == true, then the client will be show a modal dialog box asking them if they are sure they want to redirect. If the user clicks on "Yes", then the page posts back and the desired effect is that the lbtnRedirect_OnClick event is fired. How would I about tracking the lbtnRedirect event?

Edit:

I have no problem tracking the flag to show the modal (yes JS must be used to show the modal... somethings you just cannot get rid of :)). I should have been more clear.

It is when the user clicks "Yes" to continue the redirect. The page will postback again but needs to know which event to go through.

i.e. Suppose there are 3 onclick events, 1) lbtnRedirect1_Onclick 2) lbtnRedirect2_OnClick 3) lbtnRedirect3_OnClick... each of which does the confirm check.

Each onclick event does the check. So when the user clicks on "Yes" on the modal, how does the page know which event to drop back into?

View 4 Replies

Second Postback Fires - Stops First Running In Track?

Mar 22, 2010

I understand that asp:link button is a control with JS that forces a postback. I have code that runs on OnClick in codebehind of this linkbutton. I placed a counter (with the aid of viewstate) within this code to count the number of times the event fires. The first time it fires the code runs, but as the process is a little long, when the second postback fires it stops the first running in its tracks, so the execution is incomplete. I have googled this issue, and found that some say an img tag with out a complete src address forces a postback, I examined my source and I have no bad src's. The link button is on a complicated ascx page with many controls etc, so I cant post it here. Is there a way to CANCEL the link button immediately OnClick so it only runs once?

View 2 Replies

Get Dynamic Data From Log File To Track The Site Usage?

Oct 27, 2010

How can I track the users who visit the site using Log file. I want to automate the same. We have deployed around 10 websites on the web server which include .net and Flex applications. I want to make the report of site usage. Would it be possible to do the same using log files?

View 7 Replies

DataSource Controls :: Checking Row Counts In A Transaction?

Feb 25, 2010

I have a transaction that has 5 update statements.I am checking that the data is the same as it was when i selected it before i change it, as this will be from a web app that many people could update.

I want to check that the rowcount is 1 everytime i make an update, if it is one then I want to move on, if not I want to rollback and return.

Here is what I have, only it it rolling back on the first attempt everytime.

[Code]....

I am not sure if rowcount is available yet, if not what do I need to use to find out if anyrows are being updated before moving on?

View 1 Replies

DataSource Controls :: Getting The Row Counts Of A Table In The Database In VB?

Jul 8, 2010

how do I get the Row count from a table CustomerDatabaseTables in the Database.What I want to do is if the Row Count is greater than 5 then I want to disable a buttonCREATE NEW USER. But I am not able to figure out a way for doing it.Can anyone post the code for the same in VB.

View 2 Replies

Web Forms :: PostBack With Many Dynamic Controls?

Jan 25, 2011

I have an ASP.Net Application that in some cases will create up to 100 or so dynamic controls that have events being triggered from CodeDom Assembly. The problem is when at an event is fired off I have to Re-Create all those controls on a PostBack. With 10 to 30 controls its not so bad but with 100 it takes approx 3 to 4 seconds before the user can resume filling out the rest of the controls.

View 2 Replies

C# - Persisting Dynamic Controls Over Postback?

Sep 30, 2010

I have a datagrid that loads on page_load.

In this instance I can't load the datagrid in page_init as the results of the datagrid are determined by a checkbox and the checkbox would always be set to true during page_init to the viewstate not being loaded.

I have an OnItemDataBound event on the datagrid that dynamically creates controls and later on I want to access the value of some of these controls (e.g. a text box)

Of course the problem is I can't access these controls values as they don't persist over a postback.

View 1 Replies

Dynamic Controls Value Lost During Ajax Postback.

Feb 15, 2011

I have a page to wich I had several controls dynamically. When the page is posted back via Ajax, the values of the dynamically control do not make it server side. However, everything works well if the page is posted back in the normal way ( without Ajax).

I need the post back to be done via Ajax because I need to use the Callback function to perform other tasks in the UI once the call returns.I found this excellent article but it doesn't discuss ajax:

http://www.4guysfromrolla.com/articles/092904-1.aspx

View 17 Replies

Web Forms :: How To Hold Dynamic Controls On Postback

Mar 15, 2010

I'm trying to create a page that will display a survey that has multiple pages... everything displays fine, but I'm doing something wrong on the timing as my dynamic controls (for the answers) are disappearing when I post back. (so I can't get the answers or perform validation)

1) I have a Repeater control on my page that is populated in Page_Load !IsPosBack that is acting as navigation. It displays each page name, and each Repeater Item contains a LinkButton whose OnCommand event does:

2) There is a second Repeater on the page that is populated with Questions corresponding to the selected Page (from the step above) This is just a DataTable created and then DataBound to the Repeater.

3) The Questions Repeater control has an OnItemCreated event that dynamically generates the proper control for the Answer (TextBox, DropDownList, RadioButtonList, etc...) and places that control in a Placeholder in the Repeater Item.

This all works for displaying, but when I attempt to click a Button, I cannot access the controls generated in step three, and all of those controls disappear from the Repeater.

I have tried creating databinding the Questions repeater in Page_Init as well as dynamically creating the answer controls in a (foreach RepeaterItem...) statement as opposed to OnRepeaterItemDataBound... but now my buttons (located in the FooterTemplate) refuse to post back at all...

added a Test button for postback, but that doesn't work either.

View 3 Replies

How To Handle Postback For Dynamic Built Controls

Jun 18, 2010

I have this problem of handling postback for controls built dynamically.

I am having something like this:

[code]....

Now, whenever it posts back, the control disappeared. If I remove the !IsPostback, then it will always create the control.

View 2 Replies

DataSource Controls :: Write Select Query To Get Counts In Row Values?

Jun 2, 2010

How to write select query to get counts in row values

View 6 Replies

Web Forms :: Dynamic Controls Auto Postback (asp:radioButtons)?

Jan 11, 2011

I'm inserting controls dynamicaly on my page on pre-init, thease controls are inserting based on a dropDownList that load its values from a database. These values are diferent to all clients.

If I insert my controls on pre-init then I have access to the value of radiobuttons, but this insert only 1 controls cause in pre render I don't have the selected value of dropDown.

If I insert my controls on on-load event then I have the value of my dropDownList control so I can be able to inser the correct number o controls but I don't have the value of my auto-postback radioButtons.

I make a project to solve this and I share the code of it here. (VB.Net 4.0)

Front Code:

[Code]....

View 7 Replies

Forms Data Controls :: Trying To Add A Label In Gridview That Counts The Number Of Records?

Aug 18, 2010

I am trying to add a label in my gridview that counts the number of records that are being displayed as well as the total number of records found via the datasource. and i want this label to be displayed in the pager template of the gridview i.e. at the bottom.

I have the following code:

[Code]....

which i run in the rowdatabound method of the gridview. but when i run it it comes up with an error saying "null reference exception handles by code".i think the error lies in not being able to count the total number of rows in the sqldatasource in the int variable intTotalRecords. How do i go about counting the number of rows in the datasource that i am trying to pass in?

View 2 Replies

Data Controls :: Dynamic Controls Created On Button Click Get Cleared On PostBack

Jun 15, 2013

I have created a web form in which i have used user control there is linkĀ  button on different link button user control loads . i have added dynamically webcontrol to that link button . they are loading properly but when i try to save data through one of user control on click of button the user control disapper from that place but when i put static user control to my page its working

View 1 Replies

State Management :: Dynamic Controls Created Missing After Postback?

Sep 21, 2010

While generating dynamic controls like , textboxes, dropdownlist, checkboxes and radiobuttons, after filling the textboxes and etc and submit and then postback occurs, the dynamic created controls missing. I try to find a way to make the controls persist for validation checking. Tried to use Viewstate to store the pnlTextBoxes and etc, but it has serializable error.

[Code]....

View 1 Replies

State Management :: Dynamic User Controls Disappear On Postback?

Dec 15, 2010

I have several dynamic user controls,that I want to load them in seperate tab panels.but my problem is when the postback occures my user controls disapeare from my tabpanels. however I want to keep my user controls in my tabs whenever I click on each tab.

View 5 Replies

Forms Data Controls :: Gridview Count Doesn't Counts Number Of Rows?

Mar 15, 2011

I am trying to show as part of the Gridview table the amount of records found as a total in one of the Gridviews rows. I have some code which does add a row to the Gridview but it does not seem to be counting the number of rows it just shows 0 all the tim. Does anyone know why this might be? you can see the count "visitCount" and the dt.Rows.Add but it doesn't increment

[Code]....

View 5 Replies

Web Forms :: Dynamic Controls Creation / Rendering Based On Postback Values

Nov 8, 2010

I had successfully created a functionality where I can dynamically add rows and columns to a asp table by creating/re-creating controls on every page load.

I have 2 buttons - Add rows and Add columns that, basically according to a asp.,net page life cycle, occur in the following order and work perfectly fine.

Page load is fired and controls along with their viewstate are recreated. In Add row button click event - I just create a new table row and add controls to each cell dynamically.

Same thing with Add column, Delete Row and Delete Column button click events.

However, now I added a Dropdown which when its index is changed needs to retrieve values from the database and create controls based on those values and then also bind the Db values.

But it doesn't work correctly since the asp.net page cycle cannot capture the dropdown's selected value in page_load as the page_load fired first and then the selectedindexchanged event is fired later, the controls are not created.

I don't know how to handle this scenario and incorporate it into my existing code.

View 3 Replies

Forms Data Controls :: GridView W/ Dynamic BoundFields Disappears On Postback In IE Only?

May 4, 2010

have an ASP.net 4.0 page containing a GridView, where during the Page_Init event I'm dynamically adding BoundField columns to the gridview. I also have some custom sorting and paging methods that I use with this gridview, which result in postbacks on the page. In Chrome, Firefox, Safari, and Opera the gridview behaves as expected. HOWEVER, in IE 6, 7, or 8 when I click to sort a column in the gridview, or go to the next page of results in the gridview, it does not bind on postback, returning nothing back to the browser. Again, in anything but Internet Explorer, paging and sorting (frankly any postback event) brings back the gridview in its expected state. I only have the problem in IE. Relevant snippets of my code follow, where you'll see my Page_Init event calling a method in my WebFunctions class to add the BoundField columns for the table I pass to it, and my Page_Load event that calls the method in the user control responsible for binding my dataset to the gridview. Initial page load works in all browsers, but postback loading of the gridview only works in non-IE browsers.

[Code]....

View 4 Replies

Forms Data Controls :: GridView TemplateField Vanishes On Second Postback With Some Dynamic Content?

Dec 23, 2010

(Example code below)

I have a GridView. It has a 'static' TemplateField (in the .aspx page). I add and remove BoundFields to it depending on user preferences on postback. Affter the second postback, the template field appears empty.

Here is a stripped down mockup of what I'm doing. You can click the "Regular Postback" button as much as you want, and nothing bad happens. But if you click the "Recreate" button once-- it's all ok. Click it again, and the "one" column goes on Christmas break.

So is there something else I should be doing, or is this going to be a "halcyon1234 to code interface" error.

[Code]....

View 3 Replies

Forms Data Controls :: Dynamic Template In Grid View Disappear While Postback?

Mar 31, 2010

i am creating gridview with dynamic template, and the grid is disappear while postback. my code is below.

i am using GridViewTemplate class to generate Templates

Public Class GridViewTemplate

View 2 Replies

Forms Data Controls :: How To Find Total Row Counts With Gridview Control And Default Paging Enabled

Feb 3, 2010

how to get the total row counts in a Gridview control with default paging enabled? My gridview control is bind to an ObjectDataSource control.

The problem I am having right now is that when I loop through the gridview control, it only contains the total row for the current page being displayed on the screen and not

the total row in the entire grid. I am using the the for each loop.

foreach (GridViewRow row in this.MyGridView.Rows)

View 8 Replies

Forms Data Controls :: Viewstate After Postback On Gridview With Dynamic Columns Emplate Fields?

Jan 13, 2010

My datasource is an ado data table that I have convert to a new data table so that each row in the original table is now a column with 1 row in my new table. I then bind the new datatable and create dynamic template fields with a text box where I bind the values. My problem is, when I try and retrieve the values changed by the user in the rowcommand event, the template columns no longer exists.

Does anyone know how i can retrieve these values? I've read over and over that you have to rebind the grid on each postback when you use dynamic templates, but I'm not sure how to do that and retrieve the values entered in the text boxes on the client side.

[Code]....

View 1 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved