# Latest

**URL:** https://forum.dotvvm.com/latest.md?page=1

[Latest](https://forum.dotvvm.com/latest.md) · [Categories](https://forum.dotvvm.com/categories.md) · [Tags](https://forum.dotvvm.com/tags.md)

**Page:** 2

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## [DotVVM extension for VS 2026 v18.1.1](https://forum.dotvvm.com/t/dotvvm-extension-for-vs-2026-v18-1-1/350)

<div class="topic-metadata">

**Author:** [@MarianV](https://forum.dotvvm.com/u/MarianV)\
**Replies:** 3\
**Last updated:** [January 18, 2026, 10:01am UTC](https://forum.dotvvm.com/t/dotvvm-extension-for-vs-2026-v18-1-1/350 "2026-01-18T10:01:17Z")

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Hi there! I’ve checked here: Release notes | DotVVM Documentation and the extension should work but it does not. Typical error From the log: My versions:

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## [How to adjust tooltip width](https://forum.dotvvm.com/t/how-to-adjust-tooltip-width/349)

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**Author:** [@edoms06](https://forum.dotvvm.com/u/edoms06)\
**Replies:** 1\
**Last updated:** [December 2, 2025, 4:30pm UTC](https://forum.dotvvm.com/t/how-to-adjust-tooltip-width/349 "2025-12-02T16:30:20Z")

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Hi, I don’t know much frontend development, specially css. How can I adjust the width of the tooltip? \<bs:Tooltip Position=“Top” Title=“Please enter the Company Reference Number if Required”\> \<bs:TextBox Text=“{{value…

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## [DotVVM extension for Visual Studio 2026 Insiders (18.0.0 Insiders 11109.219) error](https://forum.dotvvm.com/t/dotvvm-extension-for-visual-studio-2026-insiders-18-0-0-insiders-11109-219-error/344)

<div class="topic-metadata">

**Author:** [@daltinkurt](https://forum.dotvvm.com/u/daltinkurt)\
**Replies:** 1\
**Last updated:** [November 17, 2025, 10:22am UTC](https://forum.dotvvm.com/t/dotvvm-extension-for-visual-studio-2026-insiders-18-0-0-insiders-11109-219-error/344 "2025-11-17T10:22:06Z")

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When I want to use the extension in vs2026, it gives an error.

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## [context.ReturnFileAsync](https://forum.dotvvm.com/t/context-returnfileasync/348)

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**Author:** [@DevAct](https://forum.dotvvm.com/u/DevAct)\
**Replies:** 3\
**Last updated:** [October 31, 2025, 1:41pm UTC](https://forum.dotvvm.com/t/context-returnfileasync/348 "2025-10-31T13:41:45Z")

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Hello, I am trying to download a file with ReturnFileAsync on a click on a button but it does not seem to work, did I forget something? My button is like this : \<dot:Button Text=“Download” Click=“{command: OnDownloadF…

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## [GridView - Sample 5: RowDecorators](https://forum.dotvvm.com/t/gridview-sample-5-rowdecorators/347)

<div class="topic-metadata">

**Author:** [@DevAct](https://forum.dotvvm.com/u/DevAct)\
**Replies:** 2\
**Last updated:** [October 30, 2025, 12:05pm UTC](https://forum.dotvvm.com/t/gridview-sample-5-rowdecorators/347 "2025-10-30T12:05:40Z")

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In the documentation about the GridView control, there is this sample 5 that shows how to clcik on a row, and it also changes the color of the row on which the cursor is over. Is it possible to see an example of the css…

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## [Bug with Business Pack trial version + .NET 8](https://forum.dotvvm.com/t/bug-with-business-pack-trial-version-net-8/346)

<div class="topic-metadata">

**Author:** [@DevAct](https://forum.dotvvm.com/u/DevAct)\
**Replies:** 3\
**Last updated:** [October 30, 2025, 12:04pm UTC](https://forum.dotvvm.com/t/bug-with-business-pack-trial-version-net-8/346 "2025-10-30T12:04:34Z")

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I created a DotVVM web app in .NET 8 and I installed the trial version of DotVVM.Business.Pack (4.3.2-trial). I followed the sample # 1 given in the documentation to add a bp:GridView to my page but I get this error the…

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## [\[bp:GridView\] nested grid views](https://forum.dotvvm.com/t/bp-gridview-nested-grid-views/280)

<div class="topic-metadata">

**Author:** [@MarianV](https://forum.dotvvm.com/u/MarianV)\
**Replies:** 5\
**Last updated:** [October 6, 2025, 6:47am UTC](https://forum.dotvvm.com/t/bp-gridview-nested-grid-views/280 "2025-10-06T06:47:11Z")

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Hi! Does DotVVM support GridView inside another GridView (nested)? I can’t find anything about this in the online text/video documentation. If it is supported, would you be kind to point me at some resources for best …

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## [How to clear ModelState errors on server-side?](https://forum.dotvvm.com/t/how-to-clear-modelstate-errors-on-server-side/339)

<div class="topic-metadata">

**Author:** [@MarianV](https://forum.dotvvm.com/u/MarianV)\
**Replies:** 3\
**Last updated:** [September 20, 2025, 9:27pm UTC](https://forum.dotvvm.com/t/how-to-clear-modelstate-errors-on-server-side/339 "2025-09-20T21:27:29Z")

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Hi there, On a popup (ModalDialog) I’m currently working, we use Context.AddRawModelError() to do some server-side custom validations. I trigger one of those errors, a message is shown in red on the page. I close and …

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## [How to pass user control fields data to page viewmodel on user control button click](https://forum.dotvvm.com/t/how-to-pass-user-control-fields-data-to-page-viewmodel-on-user-control-button-click/342)

<div class="topic-metadata">

**Author:** [@vibin.varghese](https://forum.dotvvm.com/u/vibin.varghese)\
**Replies:** 1\
**Last updated:** [September 17, 2025, 7:29pm UTC](https://forum.dotvvm.com/t/how-to-pass-user-control-fields-data-to-page-viewmodel-on-user-control-button-click/342 "2025-09-17T19:29:21Z")

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I have an user control with few fields and a search button, the user enters the search criteria in the user control fields and clicks on the search button present in the user control, then a page viewmodel method is call…

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## [Chyba Bootstrap4 verze 4.3.0 bs:DateTimePicker,bs:DateTimePickerFormGroup](https://forum.dotvvm.com/t/chyba-bootstrap4-verze-4-3-0-bs-datetimepicker-bs-datetimepickerformgroup/343)

<div class="topic-metadata">

**Author:** [@tengulak](https://forum.dotvvm.com/u/tengulak)\
**Replies:** 0\
**Last updated:** [September 17, 2025, 2:45pm UTC](https://forum.dotvvm.com/t/chyba-bootstrap4-verze-4-3-0-bs-datetimepicker-bs-datetimepickerformgroup/343 "2025-09-17T14:45:23Z")

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Zdravim, ked nastavim vlasnost Enabled, stačí aj na “False” nemusi byt cez Binding, stranka vzdycky padne na Null reference exception.

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## [The DotVVM equivalent for DefaultButton from WebForms asp:Panel](https://forum.dotvvm.com/t/the-dotvvm-equivalent-for-defaultbutton-from-webforms-asp-panel/341)

<div class="topic-metadata">

**Author:** [@MarianV](https://forum.dotvvm.com/u/MarianV)\
**Replies:** 2\
**Last updated:** [August 23, 2025, 1:38pm UTC](https://forum.dotvvm.com/t/the-dotvvm-equivalent-for-defaultbutton-from-webforms-asp-panel/341 "2025-08-23T13:38:50Z")

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Hi! We need to replicate the UI behaviour from some pages in WebForms where the user fills in some fields and then presses the Enter Key and the page posts back. This is achieved through the “DefaultButton” property of …

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## [\[bp:FileUpload\] front-end Business Pack error when uploading multiple files that together go beyond Kestrel's request limit](https://forum.dotvvm.com/t/bp-fileupload-front-end-business-pack-error-when-uploading-multiple-files-that-together-go-beyond-kestrels-request-limit/340)

<div class="topic-metadata">

**Author:** [@MarianV](https://forum.dotvvm.com/u/MarianV)\
**Replies:** 5\
**Last updated:** [August 6, 2025, 1:23pm UTC](https://forum.dotvvm.com/t/bp-fileupload-front-end-business-pack-error-when-uploading-multiple-files-that-together-go-beyond-kestrels-request-limit/340 "2025-08-06T13:23:36Z")

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Hi, We have a situation in a page where the user needs to be able to upload multiple files, MaxFileSize=10MB. Because the number of potential given files is apparently not limitable through means of just FileUpload its…

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## [DotVVM & knockout.js (includes the MultiSelect issue)](https://forum.dotvvm.com/t/dotvvm-knockout-js-includes-the-multiselect-issue/335)

<div class="topic-metadata">

**Author:** [@MarianV](https://forum.dotvvm.com/u/MarianV)\
**Replies:** 10\
**Last updated:** [July 29, 2025, 7:26pm UTC](https://forum.dotvvm.com/t/dotvvm-knockout-js-includes-the-multiselect-issue/335 "2025-07-29T19:26:23Z")

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Quick question: Does the team developing the framework have any plans on replacing knockout.js with something else? Apparently 5.x still uses it. If abandoning it is considered, is there a roadmap / calendar about this…

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## [Bootstrap 5 vs. FormControl Validace](https://forum.dotvvm.com/t/bootstrap-5-vs-formcontrol-validace/325)

<div class="topic-metadata">

**Author:** [@butras](https://forum.dotvvm.com/u/butras)\
**Replies:** 4\
**Last updated:** [July 21, 2025, 9:12pm UTC](https://forum.dotvvm.com/t/bootstrap-5-vs-formcontrol-validace/325 "2025-07-21T21:12:44Z")

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Chtěl jsem se zeptat pokud je vytvořen příklad: \<bs:FormControl LabelText="Název label:"\> \<bs:TextBox Text="{value: SelectText}" placeholder="Zadejte text" /\> \</bs:FormControl\> A chci provést validaci je automatick…

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## [LoadablePanel Control](https://forum.dotvvm.com/t/loadablepanel-control/333)

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**Author:** [@wolfstudiodev](https://forum.dotvvm.com/u/wolfstudiodev)\
**Replies:** 8\
**Last updated:** [July 10, 2025, 8:04am UTC](https://forum.dotvvm.com/t/loadablepanel-control/333 "2025-07-10T08:04:02Z")

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Hello, I’ve been trying to user the LoadablePanel contrib control but I get the followng error: DotVVM.Framework.Controls.DotvvmControlException: Unhandled MissingMethodException occurred in LoadablePanel.Load: Method…

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## [Local Variables](https://forum.dotvvm.com/t/local-variables/336)

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**Author:** [@daltinkurt](https://forum.dotvvm.com/u/daltinkurt)\
**Replies:** 1\
**Last updated:** [July 9, 2025, 9:02pm UTC](https://forum.dotvvm.com/t/local-variables/336 "2025-07-09T21:02:23Z")

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Hi, you wrote that: Local variables (new in version 3.0) var myVariable = SomeFunction(arg1, arg2); SomeMethod(myVariable) Note: Variables are by design single-assignable (immutable). Variables may shadow property n…

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## [\[bp:MultiSelect\] flooding the client-side console with warnings & errors + lag](https://forum.dotvvm.com/t/bp-multiselect-flooding-the-client-side-console-with-warnings-errors-lag/334)

<div class="topic-metadata">

**Author:** [@MarianV](https://forum.dotvvm.com/u/MarianV)\
**Replies:** 3\
**Last updated:** [July 5, 2025, 2:20pm UTC](https://forum.dotvvm.com/t/bp-multiselect-flooding-the-client-side-console-with-warnings-errors-lag/334 "2025-07-05T14:20:41Z")

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Hi hi, I am dealing with a page that is heavy in data sets and has a repeater of repeaters to build a suite of panels with multiple MultiSelect controls in each panel. So, what goes wrong? Crashing very verbosely o…

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## [Problem with Controls and Knockout binding handlers](https://forum.dotvvm.com/t/problem-with-controls-and-knockout-binding-handlers/324)

<div class="topic-metadata">

**Author:** [@wolfstudiodev](https://forum.dotvvm.com/u/wolfstudiodev)\
**Replies:** 2\
**Last updated:** [July 2, 2025, 11:17am UTC](https://forum.dotvvm.com/t/problem-with-controls-and-knockout-binding-handlers/324 "2025-07-02T11:17:28Z")

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Hello, I’m trying to build an OTP Input component and I’m having some troubles calling the Command binded to the control. My control code public Command OnChange { get { return (Command)GetValue(OnChangeProperty);…

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## [Steps to migrate DotVVM application on .NET Framework 4.8 to .NET8](https://forum.dotvvm.com/t/steps-to-migrate-dotvvm-application-on-net-framework-4-8-to-net8/332)

<div class="topic-metadata">

**Author:** [@Jegan](https://forum.dotvvm.com/u/Jegan)\
**Replies:** 0\
**Last updated:** [July 2, 2025, 10:41am UTC](https://forum.dotvvm.com/t/steps-to-migrate-dotvvm-application-on-net-framework-4-8-to-net8/332 "2025-07-02T10:41:31Z")

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Could you please share us the steps to migrate a DotVVM application on .NET Framework 4.8 to a DotVVM application on .NET 8. We are trying to migrate an existing ASP.NET Web Forms application to DotVVM on .NET 8, the in…

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## [Migrating dynamic generation of controls in aspx codebehind to DotVVM](https://forum.dotvvm.com/t/migrating-dynamic-generation-of-controls-in-aspx-codebehind-to-dotvvm/331)

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**Author:** [@Jegan](https://forum.dotvvm.com/u/Jegan)\
**Replies:** 0\
**Last updated:** [July 2, 2025, 10:37am UTC](https://forum.dotvvm.com/t/migrating-dynamic-generation-of-controls-in-aspx-codebehind-to-dotvvm/331 "2025-07-02T10:37:30Z")

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We are trying to migrate from ASP.NET Web forms to DotVVM on .NET Framework 4.8 and then finally to DotVVM on .NET 8. As of now there is a scenario where the controls are created dynamically in the code behind based on …

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## [DotVVM route parameters break when optional segments contain dashes](https://forum.dotvvm.com/t/dotvvm-route-parameters-break-when-optional-segments-contain-dashes/328)

<div class="topic-metadata">

**Author:** [@taroki](https://forum.dotvvm.com/u/taroki)\
**Replies:** 1\
**Last updated:** [June 26, 2025, 4:06pm UTC](https://forum.dotvvm.com/t/dotvvm-route-parameters-break-when-optional-segments-contain-dashes/328 "2025-06-26T16:06:10Z")

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Hi everyone! I am using DotVVM’s routing system with optional parameters like /products/{category?} and noticed strange behavior when the parameter value includes a dash (e.g., “home-appliances”). :innocent: The route e…

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## [Dotvvm - calling a viewmodel static method from javascript](https://forum.dotvvm.com/t/dotvvm-calling-a-viewmodel-static-method-from-javascript/329)

<div class="topic-metadata">

**Author:** [@vibin.varghese](https://forum.dotvvm.com/u/vibin.varghese)\
**Replies:** 1\
**Last updated:** [June 26, 2025, 3:44pm UTC](https://forum.dotvvm.com/t/dotvvm-calling-a-viewmodel-static-method-from-javascript/329 "2025-06-26T15:44:40Z")

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We are migrating an aspx web forms application to dotvvm. In aspx codebehind, we have an ajax method which needs to be migrated to dotvvm. This ajax method is invoked from a javascript method triggered on onblur event …

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## [bs:ModelDialog and content from view(.dothtml)](https://forum.dotvvm.com/t/bs-modeldialog-and-content-from-view-dothtml/318)

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**Author:** [@SampathkumarS](https://forum.dotvvm.com/u/SampathkumarS)\
**Replies:** 4\
**Last updated:** [June 23, 2025, 2:48pm UTC](https://forum.dotvvm.com/t/bs-modeldialog-and-content-from-view-dothtml/318 "2025-06-23T14:48:32Z")

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Hi, Is it possible to have a bs:modalDialog and dynamic content (.dothtml view). Thanks Sampathkumar S

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## [Issue with Visible attribute of Dotvvm bootstrap 5 checkbox control](https://forum.dotvvm.com/t/issue-with-visible-attribute-of-dotvvm-bootstrap-5-checkbox-control/326)

<div class="topic-metadata">

**Author:** [@vibin.varghese](https://forum.dotvvm.com/u/vibin.varghese)\
**Replies:** 0\
**Last updated:** [June 23, 2025, 11:48am UTC](https://forum.dotvvm.com/t/issue-with-visible-attribute-of-dotvvm-bootstrap-5-checkbox-control/326 "2025-06-23T11:48:56Z")

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When I try to hide the dotvvm bootstrap 5 (DotVVM.Bootstrap5.Controls) Checkbox by setting the Visible attribute to false, it does not work, and the Checkbox is displayed in the screen. But when I try the same for dotvvm…

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## [Abort Postbacku](https://forum.dotvvm.com/t/abort-postbacku/320)

<div class="topic-metadata">

**Author:** [@Alwer790](https://forum.dotvvm.com/u/Alwer790)\
**Replies:** 1\
**Last updated:** [June 18, 2025, 2:54pm UTC](https://forum.dotvvm.com/t/abort-postbacku/320 "2025-06-18T14:54:53Z")

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Zdravím, měl bych otázku jak by bylo možné přerušit již běžící postback (v tomto případě z důvodu toho, že již běží příliš dlouho a uživatel se rozhodl akci přerušit). Děkuji za rady.

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## [Is there support for creating dotvvm controls dynamically in a Dothtml page?](https://forum.dotvvm.com/t/is-there-support-for-creating-dotvvm-controls-dynamically-in-a-dothtml-page/321)

<div class="topic-metadata">

**Author:** [@ganesh\_p](https://forum.dotvvm.com/u/ganesh_p)\
**Replies:** 2\
**Last updated:** [June 16, 2025, 12:25pm UTC](https://forum.dotvvm.com/t/is-there-support-for-creating-dotvvm-controls-dynamically-in-a-dothtml-page/321 "2025-06-16T12:25:20Z")

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is there support for creating dotvvm controls dynamically in a Dothtml page? if so how to do it ? we have a dothtml page and while launching it, some configuration come from db to add new controls with types. how to hand…

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## [Request interrupted for ReturnFileAsync](https://forum.dotvvm.com/t/request-interrupted-for-returnfileasync/323)

<div class="topic-metadata">

**Author:** [@MZabel67](https://forum.dotvvm.com/u/MZabel67)\
**Replies:** 7\
**Last updated:** [June 13, 2025, 5:32pm UTC](https://forum.dotvvm.com/t/request-interrupted-for-returnfileasync/323 "2025-06-13T17:32:59Z")

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Trying to use the Return File Async MemoryStream ms = new MemoryStream(ExportDataBytes) { Position = 0 }; await Context.ReturnFileAsync(ms, “ConfirmationTracking.csv”, “text/csv”).ConfigureAwait(false); from \<dot:…

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## [When a dothtml page has a grid which contains two custom controls in the same row, need to publish the value selected in first custom control to the second custom control property in the same row](https://forum.dotvvm.com/t/when-a-dothtml-page-has-a-grid-which-contains-two-custom-controls-in-the-same-row-need-to-publish-the-value-selected-in-first-custom-control-to-the-second-custom-control-property-in-the-same-row/313)

<div class="topic-metadata">

**Author:** [@vibin.varghese](https://forum.dotvvm.com/u/vibin.varghese)\
**Replies:** 3\
**Last updated:** [May 22, 2025, 10:30pm UTC](https://forum.dotvvm.com/t/when-a-dothtml-page-has-a-grid-which-contains-two-custom-controls-in-the-same-row-need-to-publish-the-value-selected-in-first-custom-control-to-the-second-custom-control-property-in-the-same-row/313 "2025-05-22T22:30:50Z")

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When a dothtml page has a grid which contains two custom controls in the same row, need to publish the value selected in first custom control to the second custom control property in the same row. Would like to know how…

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## [Command binding with wrong po aktualizaci verze](https://forum.dotvvm.com/t/command-binding-with-wrong-po-aktualizaci-verze/309)

<div class="topic-metadata">

**Author:** [@totacz](https://forum.dotvvm.com/u/totacz)\
**Replies:** 3\
**Last updated:** [May 20, 2025, 1:23pm UTC](https://forum.dotvvm.com/t/command-binding-with-wrong-po-aktualizaci-verze/309 "2025-05-20T13:23:18Z")

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Ahoj, v jedné stránce v projektu se mi přestali fungovat tlačítka nedělal jsem v této části žádné změny, ale při jiných úpravách jsem aktualizoval na 4.3.6 a později na 4.3.7 Na jedné konkrétní stránce mi př kliknutí n…

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## [Https://forum.dotvvm.com/t/latest-dotvvm-extension-for-visual-studio-2022-failing-to-load version 17.14.0](https://forum.dotvvm.com/t/https-forum-dotvvm-com-t-latest-dotvvm-extension-for-visual-studio-2022-failing-to-load-version-17-14-0/312)

<div class="topic-metadata">

**Author:** [@SampathkumarS](https://forum.dotvvm.com/u/SampathkumarS)\
**Replies:** 1\
**Last updated:** [May 17, 2025, 2:03am UTC](https://forum.dotvvm.com/t/https-forum-dotvvm-com-t-latest-dotvvm-extension-for-visual-studio-2022-failing-to-load-version-17-14-0/312 "2025-05-17T02:03:08Z")

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Recently, the extension started to not work anymore (v4.0.583.0) while the Visual Studio 2022 version did not change (Version 17.14.0) Typical modal window shown when VS loads and before I select a project to open. And …

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