How to do conditional routing in asp.net core?

Question

I'd like to create routings like below

[HttpPost("device/{id}/disable")]
[HttpPost("device/{id}/enable")]
public async Task SetDevice(stirng id, bool state)

And when the user hit the "device/{id}/disable", the state var will automatically assigned with false, and vise versa. How can I achieve that? Thanks

Mohammad Barbast · Accepted Answer · 2020-07-14 08:06:50Z

1

You have two options or maybe more:

Use route names:

[HttpPost("device/{id}/disable", Name = "disable_device")]
[HttpPost("device/{id}/enable", Name = "enable_device")]
public async Task SetDevice(stirng id){
   //...
   //get current route name here and implement your logic
   //...
{

If you want to know how to get the route name in your action or razor view see get current route name.

Or use default route values:

[HttpPost("device/{id}/disable/{state=false}")]
[HttpPost("device/{id}/enable/{state=true}")]
public async Task SetDevice(stirng id, bool state){
   //...
{

edited Jul 14, 2020 at 8:06

answered Jul 13, 2020 at 15:53

Mohammad Barbast

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1 Comment

Michael Wang Over a year ago

Hi, @Mohammad Barbast, I tested your solution but [HttpPost("device/{id}/disable/{state?=false}")] causing RoutePatternException: The route parameter name 'state?' is invalid. Route parameter names must be non-empty and cannot contain these characters: '{', '}', '/'. The '?' character marks a parameter as optional, and can occur only at the end of the parameter. The '*' character marks a parameter as catch-all, and can occur only at the start of the parameter.

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