telerik dropdownlist default value

. 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. Components /. Thank you for your understanding. All Rights Reserved. In other words if the autoBind option is set to false, then the widget will not be bound and thus will not show the selected text. read.Action("GetDealersBoothsForDropDown", "DealerAccounting"); Data.ColorId = GetDefaultColor(brandId); All Rights Reserved. Telerik WebForms DropDownList DropDownList in RadGird. Please remove the hardcoded width and make default width 100% as in the other components.---ADMIN EDIT. So if you are telling me that you can bind a dataset to the RadDropDownList AND have the NullText property work (by displaying what is in the NullText property as the selected item when the form initially loads) then I would have to disagree - or at least say that it sure does not work that way in my app. The Default Message property could be very useful, when one needs to provide more information about the content of the RadDropDownList. 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. But after this the descendant dropdown calls eventchanged callback with 0 (default) value and dropdown shows the text passed in defaulttext parameter. All Telerik .NET tools and Kendo UI JavaScript components in one package. Try now. After the parent dropdown has changed, in its event handler I reload the dependent data source and set a new valid value. The example below demonstrates how to achieve that. 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.--- The dependent dropdown has defaulttext option. There are few important steps: A defaultItem has to be set. If you can, it is a poorly designed app. API. 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. The current demo of the UI for ASP.NET Core DropDownList demonstrates an implementation of the most common scenarios in which the component is used. Default Theme Main; Main Dark; Nordic; Ocean Blue; Purple; Turquoise; . If the widget is not bound then you will not be able to see the selected text. The value will not be set if there is no item with such value. 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. 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! 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)? Thanks! When I use DropDownListFor(x => x.UserName) I want my default value to be what I have in the Model. E.g. The dependent dropdown has defaulttext option. All Telerik .NET tools and Kendo UI JavaScript components in one package. As you are using remote binding, I will use this demo as a starting point:http://demos.telerik.com/aspnet-mvc/dropdownlist/remotedatasource. Check it out athttps://learn.telerik.com/. Marin Bratanov This item is a duplicate of an already existing item. { The fact is, a dropdown list is a dropdown list no matter where it is, winforms, web etc. See Trademarks for appropriate markings. With the MVVM patter used by the framework, you do not need methods like Clear () to remove selection - when the Value matches the default value for its type, the Telerik component will show the placeholder automatically (if one is set). To check Waldo in the drop down list : ddlGivenAnswer.FindItemByValue ( DataBinder.Eval (e.Item.DataItem, "givenAnswer").ToString () ).Selected = true; See Trademarks for appropriate markings. Progress is the leading provider of application development and digital experience technologies. See Trademarks for appropriate markings. 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. FilteredColorList = GetFilteredColorList(brandId); Can you show me how I might do this. Setting the DefaultText = "" (empty string) doesn't change the selection. Learn more about DropDownList for ASP.NET AJAX and get a free trial today. Vote for the 7 Telerik products at the 2011 Great Indian Developer Awards. once the user selects a value, they are not allowed to select 'null' again. once the user selects a value, they are not allowed to select 'null' again. Wednesday, February 25, 2009 12:25 AM 0 Sign in to vote User401360897 posted You need After Data Bound Event, Use Insert Method. Demo page for the DropDownList HtmlHelper This feedback drives me to try setting value to default and wait for re-render the descendant dropdownlist before set the wanted value. Care to elaborate on that since it is easily done with the ASP.NET Ajax controls and is contained in virtually every drop down list you find anywhere (winforms and web). DropdownList sets the value to default after the bound data has been updated. 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. Please Follow that page for status updates, I am marking this one as a duplicate to keep the portal tidy and reduce confusion in the future. Events configuration: .Events (ev => ev.Change("onChange")) Event handler: <script>. It no longer is. 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. i am binding the kendo gridview using model value. So not sure what people are saying about the "NullText" property but it seems to be useless if you are actuallybinding anydata to the control. See Trademarks for appropriate markings. 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. Dont go for server side code unless you have a client side simple code. Hello Team, I have Created Kendo Gridview with Dropdownlist inside it is not displaying the selected value while binding the gridview. I want the DropDownList to show the default text only when no option is selected. Q312 of RadControls for WinForms is available for. Now enhanced with: New to Telerik UI for Blazor? See blog below. Progress is the leading provider of application development and digital experience technologies. }. Support & Learning Resources. DropdownList sets the value to default after the bound data has been updated I have two cascaded dropdownlists, in attached example car brands and selectable colors. In the Select event the DropDownList has not yet changed the value from the previous to the new one, that is why the Change event should be used to get the new value: . Due to the remote binding, the dataBound event is the appropriate event to use in your case. itemDisabled has to be set to return the value of the defaultItem. Is there any way to avoid this behaviour of the dropdownlist? My question is how to set the default value of a DropDownList? Set the Value property to the intial value of the component (optional). I'm looking for this behaviour. By default, RadDataSource causes RadListControl and RadDropDownList to select the first item, e.g. Your sample was helpful and is one of the test cases for this scenario. The default browser behavior of Chrome and Edge is to return the selection in pixels. value, the dropdownlist calls the valuechanged callback with default value. Components /. All Rights Reserved. After the parent dropdown has changed, in its event handler I reload the dependent data source and set a new valid value. You can find the original item here: (Total attached files size should be smaller than, Progress Telerik UI for Blazor Feedback Portal, Selection should not reset value on data change, https://feedback.telerik.com/blazor/1471160-selection-should-not-reset-value-on-data-change. If you comment these two lines I hope you will experience the issue. 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. 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. Please refer to the attached project and to the attached movie. Now enhanced with: Dim _user As IQueryable(Of User) = uBl.GetAllUsersByCompany(_project.Company.CompanyID), Dim RadListDataItem1 As RadListDataItem = New RadListDataItem(). API. Direct offensive language as well as sarcasm and irony are not tolerated. Product Bundles. Two ways to accomplish: 1. myDdlData will have items for the First, Second and Third but not for the Unknown. If value is undefined, text of the data item is used. The DropDownList displays a list of values and allows for a single selection from the list. When I do not pass defaulttext parameter, the dependent dropdown selects the first element from the updated datasource. I did see a reference to this earlier in the topic so I tried it.it didn't work. And parent changes again, if the updated datasource does not contain the previous dependent value the dropdownlist sets its value to default. I'll take a look at your example though and give it another shot. The reason we do not provide placeholder for the DropDownList is that according to UI concepts a placeholder should exist on inputs only. The data source must be removed first. In the example at a first run everything's fine. autoBind is set to false ), the value method will pre-fetch the data before continuing with the value setting. function onChange (e) {. }) http://demos.telerik.com/aspnet-mvc/dropdownlist/remotedatasource, Try our brand new, jQuery-free Angular 2 components. This is mandatory when binding RadDropDownList declaratively. 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). Download free 30-day trial. Okay, manually setting the selectedindex to -1 seems to do the trick so that definitely fills the need. By default, if no Value is provided and no DefaultText is defined, the DropDownList will appear empty. This approach applies to all inputs Here are a few examples in their corresponding tabs per component: async Task OnBrandChanged(int brandId) 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. .HtmlAttributes(new { style = "width:500px" }) Take a look at this ASP.NET MVC DropDownList example to find out how events are triggered in the drop down listcontrol. This is mandatory when binding RadDropDownList at runtime. The best way to do this would be exactly how it is done in the web. Please try to stay close to the main topic of the thread using business tone of language only. 'Chai' data-value-primitive is not set. Choose a product e.g. Set the DefaultText = " ". .ServerFiltering(true); // Let's do server side filtering .DataSource(source => . 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. e.Select("onSelect"); But when you change the brand to another item, it loads the available colors, set value to brand's default color (in example McLaren default color is Yellow, Id:4). Handling values that are out of the range of the available data is something that the application must handle, and the DefaultText could mask that to an extent, but it is still something that the app must take care of (more here). Join us on our journey to create the world's most complete HTML 5 UI Framework -. The text you enter is not an option in the list (Please select an option)and the first item in the dataset is the first item in the list, which brings us back to having to add a record to the dataset at some point in order to accomplish this functionality that should be intrinsic. Some requirements may call for some sort of placeholder string indicating what the DropDownList component is for, which is where the default item feature comes in. All Rights Reserved. DropDownList Methods value value Gets or sets the value of the DropDownList. See Trademarks for appropriate markings. .Name("DealerBoothDropDown") If the widget is not bound (e.g. Copyright 2022 Progress Software Corporation and/or its subsidiaries or affiliates. Just for the record, setting "NullText" on a DropDownList in which you bind a dataset/table to does not work. #1 PassiveAggressive- look it up dude. Download free 30-day trial. Supported file types: PNG, JPG, JPEG, ZIP, RAR, TXT. In order to utilize the Virtual Scroll Rendering the DropDownHeight property must be set. The component simply cannot know what it should do in this case, whatever it does is wrong in some cases, which is why we must leave it to the app. The DropDownList on the other hand resembles a <select> tag in HTML and <select . I saw that it displays some value in a element that I don't know how to change. All Telerik .NET tools and Kendo UI JavaScript components in one package. Now enhanced with: @(Html.Kendo().DropDownListFor(m => m) Are you really thanking me? I am not exactly sure what is the problem with strongly-typed extension, but you can check here. source.Read(read => All Telerik .NET tools and Kendo UI JavaScript components in one package. default Configurator Configuration Set data-value-primitive Enable Visible Information Kendo UI DropDownList supports the enabled , events , source , value and visible bindings. i challenge telerik to justify their "it's not a bug because people rely on this behaviour" claim by describing just one plausible scenario where: 1) there's a non-primitive value & source type with an id and a label property 2) there's a data-bind value binding 3) there's a value field and text field defined 4) the desired behaviour would be to Telerik and Kendo UI are part of Progress product portfolio. Telerik and Kendo UI are part of Progress product portfolio. It's like changing the value of a vote without changing the vote him self or the name on the vote. 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. Telerik and Kendo . All Telerik .NET tools and Kendo UI JavaScript components in one package. Why the DropDownList .Value() method changes the value of the element, but not displaying it. @James: a part of your comments was deleted due to the use of offensive language. I have two cascaded dropdownlists, in attached example car brands and selectable colors. .DataTextField("DropDownText") In order to achieve your goal you can either set the AutoBind(true), which is the default value, or set the text and value of the widget. DropDownList /. Thanks! Excellent, thank you! Do you want to know when a feature you care about is added or when a bug fixed? The following properties and methods are used when binding RadDropDownList to a data source: DataSource property - set to an instance of your data source. 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. Could you please help me to implement this concept. DropDownList /. 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. alert (e.sender.value ()); Copyright 2022 Progress Software Corporation and/or its subsidiaries or affiliates. When the page loads, I would like to execute some JS that sets a default value in the Dropdown. You should manually set SelectedIndex to -1 after the form is loadedif you want to remove the selection and see the Null Text. }) Hey as long as the option is in the list I could care less where it comes from or what it is. Do you want to have your say when we set our development plans? { 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. The original response from Telerik was unclear and basically told the guy that it is stupid to put a default option in the list - he didn't specify that it was only the way he was doing it thatwas incorrect. .OptionLabel("Select Dealer and Booth") 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. I will begin with what I perceive as the outstanding issue - the ValueChanged handler firing with the default value - what would you expect that the dropdown would do when its Data collection does not hold an item that matches the Value? Download free 30-day trial. This is a migrated thread and some comments may be shown as answers. CONSOLE LOG Clear log Support & Learning Resources DropDownList Documentation Overview DropDownList Forums DropDownList Documentation Overview; DropDownList Forums; Knowledge Base Default Message property of the RadDropDownList enables the ability to set control's text if no item is selected. 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. Note the single blank space. In the following snippet, I expect to see "1" in the initial load of the page, but I see "0" - the default value for the integer. Max total file size - 20MB. This is a migrated thread and some comments may be shown as answers. Description The UI for ASP.NET Core DropDownList comes with two options for implementation - HTML and Tag Helpers. .Events(e => { I want the DropDownList to show the default text only when no option is selected. Telerik and Kendo UI are part of Progress product portfolio. Have an OnDataBound event for the dropdown and add the item in code there - no messing with the underlying data. The ONLY reason you have to mess with the underlying data in winforms is because you are not able to add the item programatically AND bind the list (in a smart way). The Telerik UI DropDownList TagHelper and HtmlHelper for ASP.NET Core are server-side wrappers for the Kendo UI DropDownList widget. { Max total file size - 20MB. DropDownList does not select the first Value in its data source Before, the Value from the first item in the Data was populated through @bind-Value to the view model. }) it sets thecurrent position to 0 and this is a desired behavior. In my case it is not acceptable because I want to set a specific value (in this example the default color), not the first and not the default. 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.

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telerik dropdownlist default value

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telerik dropdownlist default value

telerik dropdownlist default value