What are you doing?
Using a RadComboBox, I'm hiding items from the user view under certain conditions.
What's the problem?
The combo items hide perfectly, however, when I click the combo box and then click anywhere else on the page (in other words, loose focus after focusing on the combobox) all the items I have hidden become visible again.
What else have you tried?
Thinking maybe I am not using the Telerik RadCombo Client Side API correctly, I decided to check whether deleted or disabled items would also magically re-appear when focusing and unfocusing from the RadComboBox.
The result; this issue only happens when hiding items, not when deleting or disabling RadComboBox items.
Demo of problem
For clarity and convenience, I've setup a page which very simply demonstrates the problem.
Download TestRadComboItemHide.zip and extract TestRadComboItemHide.aspx.
Place this ASPX into a website/webapp project and run ensuring you have telerik dll in the bin or Telerik installed on your dev computer.
Additional info
I've requsted assistance on Telerik support forums. (24 hours ago,
nothing helpful response as yet)
Using RadControls for ASP.NET AJAX Q1 2010: 2010.1.415.40
The work around to the problem is posted on the telerik forums. The solution was provided by another forum member, not Telerik.
Related
I have a asp.net user control in a SharePoint solution. This user control uses Telerik Asp.net Ajax controls to provide a basic datagrid CRUD operations. I use this grid in a web part on a page in SharePoint 2013.
I have a datagrid which is wrapped with RadAjaxPanel to ajaxify it.
It all works fine. However, let's say, I click the add new record button and it opens a form to fill, if I leave that form intact for a minute, then start to fill and submit, it does postback and cancels form.
However, if I click on add new record and fill the form and submit, it all works fine. I guess there is a timeout somewhere which causes this, my two days of research did not help me to find it.
I was just wondering whether you have ever come across with this issue. I guess it does not matter whether it is Asp.net update panel or RadAjaxUpdatePanel, even if you have seen this issue on Asp.net update panel, that will help too.
I did not know what part of the code I should share, please let me know if you need any code to understand this issue.
There must be something on SharePoint script manager, and ajax manager, but I have no idea what.
It looks like it is a known bug in SharePoint 2013. People suggested to install December 2014 CU to solve it, but it did not solve it. Someone mentioned in this link to make request to server via javascript event given interval. As my page does postback if I leave it about 20-30 sec idle, I call a random SP web service evet 15 sec which seems to resolve my issue. Please see below link which helped me to workaround this.
Apologies for such a broad, sweeping question, but I can't really give specific code examples because as far as I can tell from research this problem is unique to the particular page I'm working on and if I knew what to do to replicate it then I'd most likely be able to fix it.
I have an asp.net vb (v3.5 using the ajaxcontroltoolkit v4) page essentially binding some straight forward SQL database data to a gridview.
The gridview's in an update panel and whenever I do anything that causes a postback inside the update panel, everything outside the update panel vanishes. The update panel IS updating correclty.
There's no conditional updating, just an 'out of the box' update panel.
All other ajax functionality is working correctly, such as filtered textbox extenders and validation with callout extenders, so I don't think it's a basic script reference error.
I'm making use of javascript and jquery to modify controls on the fly that are within the updatepanel.
It was a standalone page for development but for testing this problem I put it into a contentplaceholder on a masterpage. Now on updating, everything else in the contentplaceholder disappears, leaving the masterpages header etc present.
If you haven't come across this particular problem before, can you think of how I could go about debugging it?
If you have any ideas at all, it might be enough to set me down the right path.
Many thanks.
Thanks for taking the time to make suggestions Mt. Schneiders.
In the end...haha wow, embarrassing... I've been doing this for the best part of 6 years now and I was closing my updatepanel before closing a div that started above the panel.
Simple fix. Yay! Thanks again.
I have develop a small Kendoui app in asp.net in this i have dynamially bind the values for listview a href,it is working fine now.But my issue is
When click the listview a href link that goes to next page but it reload more than one time
how can i prevent this page load issue.
Please help me..
PageLoad may be fired twice for many reasons (and it depends on page content/set-up), you can find more details (and an answer) here:
http://forums.asp.net/t/990627.aspx/1
I am using C# and ASP.NET with version 2.0 of the .NET Framework library on this particular project. We are also using the AjaxControlToolkit. The AjaxControlToolkit should have the controls available to make a descent User Interface solution to the problem I'm facing.
I have run into this in a few projects in the last year, and used different solutions in the past. The current design of the project I just picked up, is that there is an <asp:DropDownList> control and on page load a Database call is made to get a list of values. This is then bound using DropDownList's datasource. The problem is that there is 25k items returned from the database. First thing, that's not acceptable for a user to have to scroll through tens of thousands of items. But, even more importantly, is that in every browser that it is tested on (IE 7, FF 3, Safari, and Chrome) the browser completely hangs as it is propagating the dropdownlist items.
What I'm thinking is using a Modal Popup form, which an Autocomplete Extender that allows the user to drill down to a specific company. So, in the field where they have to choose a company, they click on a "select company" icon, the modal form comes up, letting them use the autocomplete extender to select an existing company. They click "Ok" and it save the value to the field.
However, I'm an old school command line/shell/terminal guy, and my ideas of acceptable UI design might be skewed (give me a command prompt on any system, and I'm good to go). I would like the advice of those in the community here as to what they think would be an acceptable solution, or if they have faced other issues like this.
I think your idea for the autocomplete extender is the best solution. I've had this problem as well (sounds similar--a project you are taking over from somebody else). The push-back often comes from the user side. They are used to being able to select from a list of items. Unfortunately as the database grows, this becomes less and less feasible.
But when you have 0.5MB of html downloaded on the page (not including the viewstate), compromises have to be made.
Why do you think you need to create modal popup? Can't you just have the extender on your data entry page?
I had to deal with the same issue. But I ended up using a combobox with paging support and auto complete. Currently this combobox happens to be from Telerik. Its a comboBox for auto complete since you can't type into a droplist.
I agree that no user is going to want to look thru 25,000 items to find the one they want. Is there some way you can limit the data so that they drill down? Like selecting a region or type of company first and then showing the ones that match?
Multiple cascading ListBoxes, each futher refining the resultset of the previous
AJAX AutoCompleteExtender
I'm using the Telerik ASP.net control suite (2008 Q3 I believe, can't upgrade yet). I've got a radcombobox in a Radgrid control (in a GridTemplateColumn's Edit template). If functions ok, but I've got some client side validation on other controls on the grid (that appear to be working without errors). For some reason after the client side validation happens, the combo box stops functioning. No visible js errors, the thing just dies.
Anyone seen this and have fix? Google has failed me.
Thanks for your help.
Ok, I solved it. Very cludgy work around.
First, I've got a panel outside of the multiviewpanel that holds my grid with another similar Radcombobox that also died on validation. I started thinking, what if I did some sort of post back, would that fix things for some reason? So in my grid I added a custom validator that validates the RadComboBox in my grid. It calls a javascript validation method like so...
function valCOMBO(o, a) {
a.IsValid = true;
setTimeout(Res, 500);
}
function Res() { __doPostBack("<%=OPCOCombo.UniqueID %>");}
Note, since this field isn't required to be filled in by the user, I always return is valid is true. Here is where the quasi magic happens. I make a post back on the OTHER RadComboBox in the top panel outside the grid in javascript. The top out of grid RadComboBox has its autopostback set to true, don't know if that is necessary if you try this example.
It worked. All of a sudden both RadComboBoxes, both the one in the grid and the one above it started working again. But I noticed the value would be lost in the grid's RadComboBox sometimes, so for giggles I added the slight pause before doing the post back of 500 ms. That did the trick. It actually would work with a very small pause, but I increased it to 500 ms for a saftey margin incase an end user was on a slow connection and that might matter.
Cluggy, cluggy, cluggy. I wish I could have just used jQuery, and used an alternative to these freaking telerik radcomboboxes, but such is life (I hear a limited version of jQuery is burried in Telerik, will experiment with that on later releases). What sucks is I bet the latest release of Telerik fixes this problem (it better), so all this poking around will end up being unnecessary when we upgrade (can't yet, some conflict with some of the customized controls that we build inheriting off of Telerik. Jan Q1 2009+ break those controls :( )
Hope this might help someone.
Another option. I ran into a scenario where I had to use lots of RadComboboxes so rather then worry about validating their contents, I just added text fields with a button next to each one that would open a radwindow with a RadComboBox so values could be chosen dynamically. On select javascript passed the selectedvalue back to the target element on the window opener page. I ran into a few headaches that I had to work though with having a bunch of context parameters set in javascript before calling the webservice on each key up (hint: with IE set the height of Radcombobox at least for 2008 Telerik versions...if you don't you will start having freezes).
Again, hope this idea is useful.