[blazor] url enconding sometimes not working with UriHelper.NavigateTo

[ichensky]

1. Create blazor page(just replace counter page from basic vs blazor template):

@page "/counter"
@page "/counter/{search}"
@inject IUriHelper UriHelper

<p>
This search has problems with encoding:<br>
<input type="search" 
       value="@Search" 
       placeholder="enter here: `тест`"
       oninput="@(e=> UriHelper.NavigateTo($"/counter/{e.Value.ToString()}") )" />
</p>
<p>
    <input type="search" 
           value="@Search" 
           placeholder="enter here: `тест`"
       oninput="@(e=> UriHelper.NavigateTo(e.Value.ToString()) )" />
</p>

<p>Search: @Search</p>
@functions {
    [Parameter]
    public string Search { get; set; } = string.Empty;
}

2. Write any not latin text, for ex. тест in the second input field,
   page will be navigated to the /тест (in the browser url)
   and in the input
   you'll see 'тест'
3. Write any not latin text, for ex. тест in the first input field,
   page will be navigated to the /counter/тест (in_ the browser url)
   and in the input
   you'll see %D1%82%D0%B5%D1%81%D1%82 instead of тест

---

To solve this issue, needed, somewhere for ex. in basic method of blazor component OnParametersSet
call decode method for all params, like:

 protected override void OnParametersSet() {
        base.OnParametersSet();
        // do the same for all params
        Search = System.Net.WebUtility.UrlDecode(Search); 
    }

[mkArtakMSFT]

Let's investigate this for couple of hours and understand what's going on here. If it turns out to be a feature we don't have, we'll move this to 3.1.

[SteveSandersonMS]

Sorry, I've been unable to reproduce this. It's likely that this was fixed implicitly as part of some other changes we made since this was first reported. With the current code in master (which will ship in preview 8), I was able to type non-Latin characters into the first textbox in Chrome, Firefox, and Edge. They appeared correctly in the URL too:

If you're still able to reproduce this with 3.0.0-preview7 or later, please let us know!

[campersau]

I guess this was the fix which is in preview7: #8759