# Discussion in English **URL:** https://forum.dotvvm.com/c/general/4.md [Latest](https://forum.dotvvm.com/latest.md) · [Categories](https://forum.dotvvm.com/categories.md) · [Tags](https://forum.dotvvm.com/tags.md) --- ## [About the Discussion in English category](https://forum.dotvvm.com/t/about-the-discussion-in-english-category/3)
**Author:** [@tomasherceg](https://forum.dotvvm.com/u/tomasherceg)\ **Replies:** 0\ **Last updated:** [June 10, 2023, 1:34pm UTC](https://forum.dotvvm.com/t/about-the-discussion-in-english-category/3 "2023-06-10T13:34:50Z")
This category contains general discussion and questions about using DotVVM framework, Visual Studio extension, and DotVVM commercial components. :point\_up\_2: Please be respectful and kind to others. Please not that th… --- ## [Bug report after update to v5x](https://forum.dotvvm.com/t/bug-report-after-update-to-v5x/377)
**Author:** [@daltinkurt](https://forum.dotvvm.com/u/daltinkurt)\ **Replies:** 3\ **Last updated:** [September 9, 2026, 2:40pm UTC](https://forum.dotvvm.com/t/bug-report-after-update-to-v5x/377 "2026-09-09T14:40:47Z")
I noticed that code which had been working for a long time stopped functioning after updating to version 5.0.1. It works correctly in version 4.3.17. I created a test project as an example; you can take a look at it. D… --- ## [PerformanceWarningTracer crash on large view models (DotVVM 5.0.1)](https://forum.dotvvm.com/t/performancewarningtracer-crash-on-large-view-models-dotvvm-5-0-1/375)
**Author:** [@benj989](https://forum.dotvvm.com/u/benj989)\ **Replies:** 1\ **Last updated:** [September 9, 2026, 2:09pm UTC](https://forum.dotvvm.com/t/performancewarningtracer-crash-on-large-view-models-dotvvm-5-0-1/375 "2026-09-09T14:09:10Z")
Hi again team, my ‘error logs’ page which might be a sizeable viewmodel threw an error upon the DotVVM 5.0.1 update and claude code again helped provide a work around along with the below information which hopefully make… --- ## [RadioButton/CheckBox + IncludeInPage bug in DotVVM.Controls.Bootstrap4 5.0.0](https://forum.dotvvm.com/t/radiobutton-checkbox-includeinpage-bug-in-dotvvm-controls-bootstrap4-5-0-0/373)
**Author:** [@benj989](https://forum.dotvvm.com/u/benj989)\ **Replies:** 2\ **Last updated:** [September 7, 2026, 7:28am UTC](https://forum.dotvvm.com/t/radiobutton-checkbox-includeinpage-bug-in-dotvvm-controls-bootstrap4-5-0-0/373 "2026-09-07T07:28:45Z")
Hey guys, I updated my packages DotVVM 5.0.1 and Bootstrat4 5.0.0 and had a page crash out with a bs radio button control. I use claude code and had it help prepare an .md file describing my issue in detail (copied herei… --- ## [Error when creating a new DotVVM Page in Visual Studio 2022 with DotVVM 4.3.17](https://forum.dotvvm.com/t/error-when-creating-a-new-dotvvm-page-in-visual-studio-2022-with-dotvvm-4-3-17/374)
**Author:** [@wolfstudiodev](https://forum.dotvvm.com/u/wolfstudiodev)\ **Replies:** 1\ **Last updated:** [September 4, 2026, 1:51pm UTC](https://forum.dotvvm.com/t/error-when-creating-a-new-dotvvm-page-in-visual-studio-2022-with-dotvvm-4-3-17/374 "2026-09-04T13:51:56Z")
Hi, I’m having an issue when trying to create a new DotVVM Page in Visual Studio 2022 (dotvvm v4.0.600.0). My project is using DotVVM 4.3.17 and already has several DotVVM pages that were created previously and are wor… --- ## [New behavior of the IncludeInPage property](https://forum.dotvvm.com/t/new-behavior-of-the-includeinpage-property/372)
**Author:** [@daltinkurt](https://forum.dotvvm.com/u/daltinkurt)\ **Replies:** 3\ **Last updated:** [September 1, 2026, 11:33am UTC](https://forum.dotvvm.com/t/new-behavior-of-the-includeinpage-property/372 "2026-09-01T11:33:52Z")
Previously, the IncludeInPage and Visible properties could already be used together to prevent blinking. InludeInPage={value: Show} Visible={value: Show} I don’t understand why you changed the IncludeInPage behavior. … --- ## [DotVVM FileUpload](https://forum.dotvvm.com/t/dotvvm-fileupload/367)
**Author:** [@obdrzalek](https://forum.dotvvm.com/u/obdrzalek)\ **Replies:** 1\ **Last updated:** [July 31, 2026, 1:00pm UTC](https://forum.dotvvm.com/t/dotvvm-fileupload/367 "2026-07-31T13:00:32Z")
I encountered an issue with bp:FileUpload. When uploading a file, the upload fails with the error message “Missing CSRF token.” This issue was introduced in version 4.3.15 and did not occur in previous versions. --- ## [Dotvvm docs MCP server](https://forum.dotvvm.com/t/dotvvm-docs-mcp-server/366)
**Author:** [@mirecad](https://forum.dotvvm.com/u/mirecad)\ **Replies:** 1\ **Last updated:** [July 26, 2026, 12:05pm UTC](https://forum.dotvvm.com/t/dotvvm-docs-mcp-server/366 "2026-07-26T12:05:54Z")
I built a small MCP server where your AI can read control and concepts DOCS. Feel free to use it if you find it helpfull. madev/dotvvm-docs-mcp: An MCP (Model Context Protocol) server that exposes DotVVM UI control docu… --- ## [Disabling buttons with custom postbackhandler on postback](https://forum.dotvvm.com/t/disabling-buttons-with-custom-postbackhandler-on-postback/360)
**Author:** [@daltinkurt](https://forum.dotvvm.com/u/daltinkurt)\ **Replies:** 0\ **Last updated:** [May 29, 2026, 12:45pm UTC](https://forum.dotvvm.com/t/disabling-buttons-with-custom-postbackhandler-on-postback/360 "2026-05-29T12:45:50Z")
On this page, you mentioned disabling the button during the postback phase. In the attached video, I showed a problem I encountered in my own postback handler. What could I have done wrong or omitted? --- ## [Problem with button condition "Enabled={true/false}"](https://forum.dotvvm.com/t/problem-with-button-condition-enabled-true-false/358)
**Author:** [@Dosmac](https://forum.dotvvm.com/u/Dosmac)\ **Replies:** 2\ **Last updated:** [April 30, 2026, 7:31am UTC](https://forum.dotvvm.com/t/problem-with-button-condition-enabled-true-false/358 "2026-04-30T07:31:57Z")
Hello, I am having trouble with disabling buttons conditionally: I have this type of button: \ **Author:** [@lsmashnuk](https://forum.dotvvm.com/u/lsmashnuk)\ **Replies:** 1\ **Last updated:** [April 16, 2026, 2:07pm UTC](https://forum.dotvvm.com/t/visual-studio-extention-v4-0-593-0-fails-to-load-after-visual-studio-2022-security-update-17-14-30/357 "2026-04-16T14:07:22Z") Microsoft Windows Updates installed Visual Studio 2022 Security Update (17.14.30). Now the current Visual Studio Extention v4.0.593.0 fails to load. --- ## [Bug in javascript](https://forum.dotvvm.com/t/bug-in-javascript/356)
**Author:** [@daltinkurt](https://forum.dotvvm.com/u/daltinkurt)\ **Replies:** 3\ **Last updated:** [April 14, 2026, 6:06am UTC](https://forum.dotvvm.com/t/bug-in-javascript/356 "2026-04-14T06:06:57Z")
Hi, Compilation Status Page gives me a warning when i use ‘\<=’ check in pure javascript: Test.dotvvm: ... \ \
{{value: Now}} \ \ function AnyMethod() { … --- ## [Problems Accessing Bootstrap v4 Nuget Package Source](https://forum.dotvvm.com/t/problems-accessing-bootstrap-v4-nuget-package-source/351)
**Author:** [@d.wecker](https://forum.dotvvm.com/u/d.wecker)\ **Replies:** 3\ **Last updated:** [March 26, 2026, 10:49am UTC](https://forum.dotvvm.com/t/problems-accessing-bootstrap-v4-nuget-package-source/351 "2026-03-26T10:49:17Z")
Hello DotVVM Team, Since late yesterday afternoon (Central European Time), we have been experiencing a major problem in that we are no longer able to process our DotVVM projects properly via CI pipelines. In approximate… --- ## [Compilation error when checking existence of BusinessPackDataSet item](https://forum.dotvvm.com/t/compilation-error-when-checking-existence-of-businesspackdataset-item/241)
**Author:** [@mirecad](https://forum.dotvvm.com/u/mirecad)\ **Replies:** 10\ **Last updated:** [March 20, 2026, 4:38pm UTC](https://forum.dotvvm.com/t/compilation-error-when-checking-existence-of-businesspackdataset-item/241 "2026-03-20T16:38:09Z")
I need to check existence of item in my BusinessPackDataSet on front end. I do this using this crazy expression IncludeInPage="{value: \_root.VykonsOverviewViewModel.MedicalProcedures.Items.ToList().Any(x =\> x.IdCvykon =… --- ## [Using jquery-ui datepicker with Dotvvm 4.3 TextBox control](https://forum.dotvvm.com/t/using-jquery-ui-datepicker-with-dotvvm-4-3-textbox-control/355)
**Author:** [@lsmashnuk](https://forum.dotvvm.com/u/lsmashnuk)\ **Replies:** 2\ **Last updated:** [March 18, 2026, 12:56am UTC](https://forum.dotvvm.com/t/using-jquery-ui-datepicker-with-dotvvm-4-3-textbox-control/355 "2026-03-18T00:56:00Z")
Are there any examples of using jquery-ui datepicker on a TextBox with Dotvvm 4.3? I can get the calendar to appear and I can select a date. The correct date is displayed in the text box, but when the form is submitted … --- ## [DotVVM Bootstrap Extension: Unhandled Exception in JS](https://forum.dotvvm.com/t/dotvvm-bootstrap-extension-unhandled-exception-in-js/354)
**Author:** [@d.wecker](https://forum.dotvvm.com/u/d.wecker)\ **Replies:** 2\ **Last updated:** [March 5, 2026, 10:17am UTC](https://forum.dotvvm.com/t/dotvvm-bootstrap-extension-unhandled-exception-in-js/354 "2026-03-05T10:17:53Z")
Dear DotVVM Team, We are facing once in a while and currently quite often unhandled exceptions when debugging our DotVVM application which seem to come from the Bootstrap4 extension. This is quite annoying to the extent… --- ## [IPageableGridViewDataSet in usercontrol](https://forum.dotvvm.com/t/ipageablegridviewdataset-in-usercontrol/353)
**Author:** [@daltinkurt](https://forum.dotvvm.com/u/daltinkurt)\ **Replies:** 3\ **Last updated:** [February 25, 2026, 10:35pm UTC](https://forum.dotvvm.com/t/ipageablegridviewdataset-in-usercontrol/353 "2026-02-25T22:35:53Z")
Hi, I have a user control that I use for datapager. @viewModel DotVVM.Framework.Controls.IPageableGridViewDataSet @noWrapperTag \ … \ I was using it without an… --- ## [What is the equivalent of Attributes property in dotvvm](https://forum.dotvvm.com/t/what-is-the-equivalent-of-attributes-property-in-dotvvm/352)
**Author:** [@vibin.varghese](https://forum.dotvvm.com/u/vibin.varghese)\ **Replies:** 2\ **Last updated:** [February 3, 2026, 9:27am UTC](https://forum.dotvvm.com/t/what-is-the-equivalent-of-attributes-property-in-dotvvm/352 "2026-02-03T09:27:23Z")
For the asp.net web forms server controls, we have the “Attributes” property using which we can assign the control attributes in code-behind. Do we have an equivalent property for dotvvm controls or can you suggest a wo… --- ## [DotVVM extension for VS 2026 v18.1.1](https://forum.dotvvm.com/t/dotvvm-extension-for-vs-2026-v18-1-1/350)
**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")
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: --- ## [How to adjust tooltip width](https://forum.dotvvm.com/t/how-to-adjust-tooltip-width/349)
**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")
Hi, I don’t know much frontend development, specially css. How can I adjust the width of the tooltip? \ \ **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")
When I want to use the extension in vs2026, it gives an error. --- ## [context.ReturnFileAsync](https://forum.dotvvm.com/t/context-returnfileasync/348)
**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")
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 : \ **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") 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… --- ## [Bug with Business Pack trial version + .NET 8](https://forum.dotvvm.com/t/bug-with-business-pack-trial-version-net-8/346)
**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")
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… --- ## [\[bp:GridView\] nested grid views](https://forum.dotvvm.com/t/bp-gridview-nested-grid-views/280)
**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")
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 … --- ## [How to clear ModelState errors on server-side?](https://forum.dotvvm.com/t/how-to-clear-modelstate-errors-on-server-side/339)
**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")
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 … --- ## [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)
**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")
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… --- ## [The DotVVM equivalent for DefaultButton from WebForms asp:Panel](https://forum.dotvvm.com/t/the-dotvvm-equivalent-for-defaultbutton-from-webforms-asp-panel/341)
**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")
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 … --- ## [\[bp:FileUpload\] 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)
**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")
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… --- ## [DotVVM & knockout.js (includes the MultiSelect issue)](https://forum.dotvvm.com/t/dotvvm-knockout-js-includes-the-multiselect-issue/335)
**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")
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… [Next page](https://forum.dotvvm.com/c/general/4.md?page=1)