Mark data dirty when an form field is edited

[gautam-sarup]

Is it possible to set a flag when any field on a screen is modified? The option is keep setting a flag in every field and clearing it when the data is saved. Not a huge big problem but it is tedious and I wondered if there's a better way.

[dvoituron]

You could use a FluentEditForm and the OnFieldChanged event.
More on this page: https://learn.microsoft.com/en-us/aspnet/core/blazor/forms/validation

[gautam-sarup]

Is there any other way? With the OnFieldChanged event, the form gets marked as modified even it fields were changed as a result of selection from a list e.g. selecting from a list of policies sets the value on multiple fields but this should not mark the form as modified.

[vnbaaij]

Why should the form then not be marked modified? Fields are changed == modified, right.

No need to use FluentEditForm btw, that is only useful when using the Wizard component. If not, EditForm is sufficient.

We don't do anything special regarding validation. We just use the standard Blazor way.

[gautam-sarup]

I'll change to EditForm. Thanks for explaining the difference. The reason that the form should not be marked modified is that it was populated with values fetched from a database. I need to mark it modified only when a user changes a field in the current session. Probably I did not explain well.

• there is a FluentSelect populated with something, say client names, that are fetched from a database
• when the user selects a client, the rest of the fields in the form are populated (address etc). At this stage, the form is not to be marked modified because the UI matches the database record.
• if the user edits any of the fields, then the form should be marked modified because now it differs from the database record.

I don't know the Blazor way - trying to find my way to building an application in bits and pieces. Making a lot of mistakes as a consequence.

[vnbaaij]

I don't think that is how the modified process works.
But perhaps you can hook into the validation process yourself.

[gautam-sarup]

Thanks.