So I have a generic URL that is used in multiple places on my React app to send a call to my asp.net core api. Now due to a change requrement, I need to use the same url but in one specific scenario, I need to send an additional query parameter. I want to use the same url without affecting the current implementation. Please suggest or direct me to the proper way in asp.net core to implement this.
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https://stackoverflow.com/questions/57768429/c-sharp-web-api-optional-parameters-in-query-string – Roberto Zvjerković Mar 11 '21 at 12:57
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Does this answer your question? [asp.net mvc routing with multiple optional parameters did not work](https://stackoverflow.com/questions/37582394/asp-net-mvc-routing-with-multiple-optional-parameters-did-not-work) – Christoph Lütjen Mar 11 '21 at 14:47
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S.a. https://learn.microsoft.com/en-us/aspnet/core/fundamentals/routing?view=aspnetcore-5.0#rtr – Christoph Lütjen Mar 11 '21 at 14:47
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Thank you everyone, @ChristophLütjen, I think this might help me with the concept and implementation. – Alina Mar 11 '21 at 15:59
1 Answers
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About the optional query parameters in WebApi, the usual practice is to add ?, but it can only correspond to the order of the parameters one-to-one.
[Route("get/{a?}/{b?}")]
public IActionResult get( string a, string b)
{
return Ok(new { a,b});
}
If you use multiple [Route] to achieve the same purpose as above. It can match the corresponding value according to the data type.
[Route("get/{a}")]
[Route("get/{a}/{b}")]
[Route("get/{b:int}")]
public IActionResult get( string a, int b)
{
return Ok(new { a,b});
}
About other rules, you can refer to the document which Christoph Lütjen provided in comment.
Karney.
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what about reactjs, is there someway to add an optional parameter there aswell? – Alina Mar 12 '21 at 15:46