I am using 1 main update panel which contains Search criteria and a Search button.
In side this main update panel I am using 4 update panels.
These four update panels fetching search results from different 4 SQL quires. Currently I did this.
But my question is, currently the page will come to display after fetching all all 4 update panels.
But I needed, If one panel get full record that one panel will come to display. then next filed panel.... Like this.
Please help me.
If I understand you correctly, you want the inner UpdatePanels to update consecutively when the outer UpdatePanel is updated? If this is correct then by default, all nested UpdatePanels will be updated when the parent UpdatePanel is updated.
It sounds like it would be better to not have the outer UpdatePanel, set a trigger on (inner) UpdatePanel 1 to update when search is clicked, set a trigger on UpdatePanel 2 to update when UpdatePanel 1 updates, etc, etc.
Alternatively, you could implement AJAX calls to Page Methods or Web services to populate the contents of the UpdatePanels and do away with the UpdatePanels instead.
Jason I think you problem may stem from the fact that you have nested your 'SQL' UpdatePanels within the 'Search' Update panel. You may want to separate them and look at AsyncPostBack triggers to get all four to fire once you have entered search critera.
The question is not clear, but you can check the results of the four queries in the Selected event of each of the DataSourceControls you use (I suppose you do), and if you find a record in a set displayed in the previous set, then apply your custom adjustment.
A side question: why using 4 update panels while the whole 5 panels are triggered by the same source (the search button)?
Related
So, basically my problem is that i have a series of tabs on my page, one of the tabs (not the default one) has two drop-down lists, the second drop-down list only populates after an item from the first drop-down list is selected, obviously without putting the autopostback = true value in my drop-down list, they wont automatically populate however adding autopostback = true causes the page to reload and changes tabs back to the primary default tab. Is there any way around this that people know as i don't really want the users having to change back to the correct tab 4 times to fill in a form. Thanks
I think your dropdown is asp:DropDown (server side). I recomend you to use html element and do your staff at front end with jquery,ajax etc. But in your case if you want to update part of the page without using front end tools (jquery-ajax), You should use asp:UpdatePanel for it. Search for it, it is not so complex. Good luck.
Introduction to the UpdatePanel Control
How do I use updatePanel in asp.net without refreshing all page
this is my second option regarding my first question I did a lot of searching in google and tried it for a couple of times. Do you think its possible to populate a gridview without any postback from a dropdownlist?
Use update panel and script manager. Change properties of update panel Update mod conditional. After you can call when you want "updatepanel.Update()" or select your trigers and it ll do it automaticly.
No. You need postback in some form traditionally or using AJAX. These kinds of things happen in the server and that is why you need postback. Or you can use extensive Javascript.
You can use JavaScript and draw the whole gridview since a gridview is a table with columns and rows.
I know this has been asked, but none of the numerous answers fit with my situation. So I will humbly ask if someone can walk me through this again gently.
Environment: .Net 4 web app using c#, javascript, jquery, sql server, and entity framework.
Question: I need to be able to allow a user to "quick add" a value into a table that is bound to a drop down box without losing values a user has already entered onto current page. I don't care if I have to do a postback or use jquery or use ajax, etc. I need the functionality first - prettiness later ... the scenario is described below if you care to keep reading. With all that being said, I would love for this to be smooth and not "clunky" for the user.
Scenario:
I have a page where the user is able to enter many pieces of information into textboxes, static drop down boxes, and drop down boxes that are bound to other tables that will all get combined and inserted into one table. Well, it never fails, a user could be filling in the page and when they get to one of the table bound drop down boxes - a value is missing or they haven't added something item yet. I would like to add a button or link or something next to that drop down box that would allow the user to "quick add" an item to the table that fills that drop down box and then refresh the drop down box so they can choose that new value from the list ... all while not losing the other data on the screen they already entered.
What I've tried:
-Tried WebMethod option. Currently, this web page calls some custom "bind" methods in the code behind to fill drop down boxes so they are not filled directly from objects from entity framework. So that means using a static method will not work for a solution because part of the static function would need to call the bind method to refresh the drop down box with the newly inserted values.
-Tried PageMethod option. Some of the other samples used Page Method settings, but my site uses master and content pages and the posts seem to state that the page method route was not going to work.
Make sense?
Add an UpdatePanel to the page. The update panel should wrap the drop down to be added, as well as the textbox/button for adding a new entry to that drop down. You would want to have a different UpdatePanel for each dropdown/button pair, if applicable.
When they click the button inside of the update panel you can read the textbox, add an extra item to the drop down, and send an update to the database. (I'd manually add the new value to the drop down rather than updating the database and re-binding, if possible, but it may not be.)
The magic of UpdatePanels will make sure that this is all asynchronous and so doesn't disturb the user working on the page.
In my page, i got two column and multiple rows. The first column contain the label such as question for the 1st row, and the options for the questions. And the second column is the textboxes. When i click on add button, i wish to add those controls to page which subsequently allowed me to add the value in the texbox to database. I did some research but most of them uses javascript or datatable. Is there any other method?
You don't specifically say what type of .net development you are doing, and your question is tagged with asp-classic, which I doubt you're using. [If you are please please stop] So I will assume you are using Web Forms.
While I don't agree with Inerdial's position that you should avoid dynamic controls at all costs, I will say it does make things much more complex and requires a very good knowledge of the ASP.net Lifecycle. If you truly want to go down that path, here is a great resource.
With that said what you are describing to me does not appear to need that and his suggestion of setting the control visibility to false is a good one.
You could create a row, a panel or a div and output the controls that you need when adding a new row and set it's server-side visibility to false whenever you don't want it displayed. Then you could have a link that when clicked it toggles the visibility to true and will allow the user to add items. Once users add items they'll be displayed in your data table and you can reuse the form to add additional items.
I would also like to encourage you to consider JavaScript if it isn't an overly complex form. It eliminates an extra round-trip to your server and in general is a better user experience.
Edit: This link may also be of use to you.
Ok, so there has to be a way to do this... no? If not I'd love some ideas.
I have two repeaters and an image inside an update panel along with some AJAX dropdowns with link buttons to the left. I want to update the data inside the update panel as fast as possible as values are selected from the dropdowns.
What do you think would be the best way to update the data? The repeaters are populated by objects, so if I could just filter the objects by some properties I could end up with the correct data. No new data from the server is needed.
Anyone have some ideas?
As far as I know, it is not easy to get just Data and data-bind the repeater on the client side. But, you might want to check this out.
Wrap only the repeater you want to rebind with an update panel of its own. The only viewstate transferred when doing this is the portion inside the update panel. You may have to play around with the triggers and update mode of the panels to get everything to play nicely.
Another option is instead of using repeaters, serialize your objects into XML and then write a page method that returns an html string of your transformed data using xsl. Then client side call your path method and update the DOM as appropriate.
A third option is to use use a service reference/page method to return JSON objects and update the DOM manually.
http://www.asp.net/AJAX/Documentation/Live/tutorials/ASPNETAJAXWebServicesTutorials.aspx
Good luck! I have done all 3,
If your data is already rendered to the screen, you can access the dom and manipulate the dom and hide/remove the ones you want. I've done this with jquery, but the same should be possible with ASP.NET Ajax library.