Need to show 404 page

[saleemhaq]

The correct url is: https://localhost:44300/article/register

but when someone edit or mistakenly type the wrong url the error has come header is twice show and error is show: An error occurred while executing this request.

Need to show the custom 404 page, please advise @Skrypt @ns8482e

[lampersky]

you can create custom 404 page by adding NotFound.liquid to the Views/shared directory

example1

example2

[saleemhaq]

you can create custom 404 page by adding NotFound.liquid to the Views/shared directory

example1

example2

I already has the 404 page but it was not show

I used the razor syntax and simple line show the form and i am using the theme in decouple cms see below:

Please advise

[jtkech]

You are checking if article is null or not but then further you are using it as is article.Content... so it fails on server side, first just try to use a null check e.g. with the null operator article?.Content..., and without casting it to (string) as it may fail if the result is null.

Then maybe something like this

var markdown = article?.As<MarkdownBodyPart>()?.Markdown;

[saleemhaq]

You are checking if article is null or not but then further you are using it as is article.Content... so it fails on server side, first just try to use a null check e.g. with the null operator article?.Content..., and without casting it to (string) as it may fail if the result is null.

Then maybe something like this

var markdown = article?.As<MarkdownBodyPart>()?.Markdown;

Want to show the 404 page if article is null so how can i achieve that @jtkech

[ns8482e]

@saleemhaq If I were you, l’d have used OnGet using PageModel and inside OnGet if article is null returned NotFound that would have captured by my 404 page

[saleemhaq]

@saleemhaq If I were you, l’d have used OnGet using PageModel and inside OnGet if article is null returned NotFound that would have captured by my 404 page

Can you shared with the example code for that in razor syntax i will try to applied that @ns8482e

[ns8482e]

public IActionResult OnGet(int id)
{

//query your content item from id
    var markdown = article?.As<MarkdownBodyPart>()?.Markdown;
    if (markdown == null)
    {
        return NotFound();
    }

    return Page();
}