telerik dropdownlist default value

) .Events(e => { It provides flexible data binding, virtualization, cascading lists, appearance customization through templates, events, validation, accessibility, RTL support and keyboard navigation. Can you show me an examplewhere you are bindinga dataset/datatable to the dropdownlist and also have a default "Please make a selection" item in the list (without adding it to the underlying dataset somehow)? . Am I missing something? Due to the remote binding, the dataBound event is the appropriate event to use in your case. { Marin Bratanov If so, please click the Follow button on the original request for that: https://feedback.telerik.com/blazor/1471160-selection-should-not-reset-value-on-data-change. The dependent dropdown has defaulttext option. Components /. By default, if no Value is provided and no DefaultText is defined, the DropDownList will appear empty. To display DefaultText - Value should be 0 or null depending on the data type you are using in the ValueField and the DefaultText should be defined. The reason we do not provide placeholder for the DropDownList is that according to UI concepts a placeholder should exist on inputs only. E.g. In order to utilize the Virtual Scroll Rendering the DropDownHeight property must be set. The article shows how to change this and display point value in the real font sizes dropdown header - RadEditor for ASP.NET AJAX Find other useful information in the Knowledgebase section of the ASP.NET AJAX documentation. All Telerik .NET tools and Kendo UI JavaScript components in one package. In next round when dependent dropdown holds the default value, after reloading datasource it works as expected. Then, use the DataSource API to get the desired item (the one that should be selected by default) and use the value method to select it. }) Download free 30-day trial. Hello Team, I have Created Kendo Gridview with Dropdownlist inside it is not displaying the selected value while binding the gridview. The DropDownList on the other hand resembles a <select> tag in HTML and <select . E.g. All I am saying is that it is NOT bad design to have a default option and that it IS bad design to NOT have a default option. Thanks! Set the TextField and ValueField parameters to point to the corresponding property names of the model. Please try to stay close to the main topic of the thread using business tone of language only. value, the dropdownlist calls the valuechanged callback with default value. You have to bear in the mind that you can see Null text only in case that the control is not in focus (this is a desired behavior). The Telerik UI DropDownList TagHelper and HtmlHelper for ASP.NET Core are server-side wrappers for the Kendo UI DropDownList widget. Learn more about DropDownList for ASP.NET AJAX and get a free trial today. Copyright 2022 Progress Software Corporation and/or its subsidiaries or affiliates. { I'll take a look at your example though and give it another shot. The dependent dropdown has defaulttext option. I am testing with the current latest (2.21.1 at the time of writing) which has the fix for the other issue you linked as well. All Telerik .NET tools and Kendo UI JavaScript components in one package. Progress, Telerik, Ipswitch, Chef, Kemp, Flowmon and certain product names used herein are trademarks or registered trademarks of Progress Software Corporation and/or one of its subsidiaries or affiliates in the U.S. and/or other countries. Supported file types: PNG, JPG, JPEG, ZIP, RAR, TXT. Components /. The fact is, a dropdown list is a dropdown list no matter where it is, winforms, web etc. If the widget is not bound then you will not be able to see the selected text. Supported file types: PNG, JPG, JPEG, ZIP, RAR, TXT. All Rights Reserved. alert (e.sender.value ()); Download free 30-day trial. .Filter("contains") That is a ridiculous statement in my humble opinion since having a Default (NOT Null) value only enhances usability and actually makes the control able to be validated (otherwise the user can just leave the first item selected and you can't validate that they actually made a selection vs. forgetting and leaving the 1st item selected). See blog below. I did see a reference to this earlier in the topic so I tried it.it didn't work. #1 PassiveAggressive- look it up dude. The following properties and methods are used when binding RadDropDownList to a data source: DataSource property - set to an instance of your data source. I have two cascaded dropdownlists, in attached example car brands and selectable colors. See Trademarks for appropriate markings. Progress is the leading provider of application development and digital experience technologies. .DataSource(source => In the feedback I mentioned in my bugreport it gave me a workaround: set a descendant dropdown value to default(TValue) (0 in this case), delay for a short while until dropdown re-renders. This item is a duplicate of an already existing item. Thank you for your understanding. async Task OnBrandChanged(int brandId) Progress, Telerik, and certain product names used herein are trademarks or registered trademarks of Progress Software Corporation and/or one of its subsidiaries or affiliates in the U.S. and/or other countries. See Trademarks for appropriate markings. Once again, not talking about how it is implemented I'm just talking about simply having a default item which is what the original response seemed to be saying was a bad idea. once the user selects a value, they are not allowed to select 'null' again. All Rights Reserved. }) Telerik UI for ASP.NET MVC . Have an OnDataBound event for the dropdown and add the item in code there - no messing with the underlying data. I just took issue with someone from Telerikbasically saying that having a "Select Option" is against best practices and UI design, that is not the case IMO. Just add a default value in your dropdown like --Select-- Now make the AppendDataBoundItems property of Dropdown to "True" Thats it. This is mandatory when binding RadDropDownList at runtime. NOT having a default "Select Option" is against best practice and UI designin my opinion - how you get it there is up to you and yes some of the ways you may choose to do this may not be the best. This approach applies to all inputs Here are a few examples in their corresponding tabs per component: Why don't you show me an application anywhere in which a user is required to select a value from a drop-down list that does NOT have a default option. Copyright 2022 Progress Software Corporation and/or its subsidiaries or affiliates. But hey, that's just my opinion and asyou saywe are all entitled to our own opinions. Excellent, thank you! Now enhanced with: @(Html.Kendo().DropDownListFor(m => m) Solution. Is there any way to avoid this behaviour of the dropdownlist? Okay, manually setting the selectedindex to -1 seems to do the trick so that definitely fills the need. Max total file size - 20MB. Virtual Classroom, the free self-paced technical training that gets you up to speed with Telerik and Kendo UI products quickly just got a fresh new look + new and improved content including a brand new Blazor course! In the example at a first run everything's fine. Progress, Telerik, Ipswitch, Chef, Kemp, Flowmon and certain product names used herein are trademarks or registered trademarks of Progress Software Corporation and/or one of its subsidiaries or affiliates in the U.S. and/or other countries. in model values is available but it is not displaying the selected value and once after changing the dropdown value it is reflecting ID Value in another label where i bind IDtext. Progress, Telerik, Ipswitch, Chef, Kemp, Flowmon and certain product names used herein are trademarks or registered trademarks of Progress Software Corporation and/or one of its subsidiaries or affiliates in the U.S. and/or other countries. DropDownList Documentation Overview; DropDownList Forums; Knowledge Base I think what you are doing in the attached file is the correct approach and I cannot see issues in its behavior - when I change the car brand I see the default text as I would expect since there is no matching item in the datasource and the app code has taken care of setting that. You can modify the default text to be shown only before an item is selected by toggling the DefaultText parameter value depending on your business logic. If you comment these two lines I hope you will experience the issue. I want the DropDownList to show the default text only when no option is selected. Indeed, the ValueChanged event should not fire like that and we've reviewed this case too - the issue (and solution) are the same as here: https://feedback.telerik.com/blazor/1471160-selection-should-not-reset-value-on-data-change. Try now. Adding a default value to a drop-down list goes against best practices & UI standards? When using the control in data bound mode you should not manipulate, http://www.wiseowl.co.uk/blog/s110/set-first-item-list-control.htm. Progress Telerik. I updated the title to be more generic - it should be about removing the inline width rule, and whether there will be a default value and what units it will use will be up to a more detailed research.--- it sets thecurrent position to 0 and this is a desired behavior. If you are able to have a "Select Option" or whatever as the first item in the list so that you can validate that a user actually made a selection, that's all I am talking about. Product Bundles. Wednesday, February 25, 2009 12:25 AM 0 Sign in to vote User401360897 posted You need After Data Bound Event, Use Insert Method. Dont go for server side code unless you have a client side simple code. Telerik and Kendo . I'm looking for this behaviour. Telerik and Kendo UI are part of Progress product portfolio. After the parent dropdown has changed, in its event handler I reload the dependent data source and set a new valid value. Support & Learning Resources. To bind the DropDownList to a model: Populate its Data parameter with the collection of items you want in the dropdown. Progress is the leading provider of application development and digital experience technologies. In this demo you can see the Tag Helper example and specified data text and value fields, virtualization, templates and filtering with specified minimum length option. Copyright 2022 Progress Software Corporation and/or its subsidiaries or affiliates. All Rights Reserved. So I am obviously not aware of this "Null Text" but I will look into it because adding a value to a datasource IS dumb, but seemed to be theeasiestway. I saw that it displays some value in a element that I don't know how to change. The best way to do this would be exactly how it is done in the web. source.Read(read => If the data source does not contain the previous (!)