The RemoteAttribute depends on jQuery via the unobtrusive ajax library. There is nothing comparable in Blazor. You just need to wire up an event handler to the onchange event of an input that calls a service to perform validation as required. Something like
this:
Thank you for the reply (and the bad news ), @Mikesdotnetting! Obviously not a cool as adding an attribute and allowing things to "just work" but it will put me in the right direction. I will probably encapsulate it in a component and use that instead.
Blazor uses data attribute validation, so you can create your own custom validators. But currently there is no async validation, so they should not be used for remote validation.
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RemoteAttribute?
Aug 13, 2020 06:55 AM|MichaelDBang|LINK
Looking to do this:
https://stackoverflow.com/questions/54186153/remote-validation-in-asp-net-core-razor-pages
But in Blazor Server-side, and preferably without JQuery.
Possible?
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Re: RemoteAttribute?
Aug 17, 2020 02:56 PM|Mikesdotnetting|LINK
The RemoteAttribute depends on jQuery via the unobtrusive ajax library. There is nothing comparable in Blazor. You just need to wire up an event handler to the onchange event of an input that calls a service to perform validation as required. Something like this:
<input value="@emailAddress" @onchange=@(e => validate(e)) /> @code { string emailAddress { get; set; } async Task validate(ChangeEventArgs e) { if (await client.GetFromJsonAsync<bool>("/api/email/validate?emailAddress=" + e.Value)) { emailAddress = e.Value.ToString(); } } }The method at api/email/validate will contain the logic that ensures the value is valid, returning a bool either way.
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Re: RemoteAttribute?
Aug 17, 2020 03:13 PM|MichaelDBang|LINK
Thank you for the reply (and the bad news ), @Mikesdotnetting! Obviously not a cool as adding an attribute and allowing things to "just work" but it will put me in the right direction. I will probably encapsulate it in a component and use that instead.
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Re: RemoteAttribute?
Aug 17, 2020 07:49 PM|bruce (sqlwork.com)|LINK
Blazor uses data attribute validation, so you can create your own custom validators. But currently there is no async validation, so they should not be used for remote validation.