I have this controller method
//[HttpGet("{id}")]
public IActionResult Nav(string id)
{
return HtmlEncoder.Default.Encode($"Hello {id}");
//return Content("Here's the ContentResult message.");
}
that i want to pass a string parameter and display it when i visit the controller method https://localhost:7123/Home/Nav/Logan. I get this error.
Cannot implicitly convert type 'string' to 'Microsoft.AspNetCore.Mvc.IActionResult'
I am using asp net core 6.
It is throwing this error as you are returning a string when it expects an IActionResult. You can easily solve this by returning Ok($"Hello {id}");
public IActionResult Nav(string id, int num) { return Ok($"Hello {id} {num}"); }https://localhost:7123/Home/Nav/6?num=5
[HttpGet("{id}")] which means that the action method is expecting something like /Home/Nav/{id}. If you do not declare a route, your url would be https://localhost:7123/Home/Nav?id=6&num=5Let me explain.
return HtmlEncoder.Default.Encode($"Hello {id}");
This will return string and your method expect IActionResult so it get failed.
public string Nav(string id)
{
return HtmlEncoder.Default.Encode($"Hello {id}");
}
Now if you two paramter then you have to configure route that way. Default route only expect one Id.
[HttpGet("Nav/{id}/{two}")]
public string Nav(string id,string two)
{
return HtmlEncoder.Default.Encode($"Hello {id},{two}");
}
You can use Content or Ok Result and provide your output.
public IActionResult Nav(string id)
{
return Ok(HtmlEncoder.Default.Encode($"Hello {id}"));
}
public string Nav(string id, string two) { return two; //return Content("Here's the ContentResult message."); } but failsI fixed it this way. This is the url https://localhost:7123/Home/Nav/6?num=5&third=3
and this is the method
public IActionResult Nav(string id, int num, string third)
{
return Ok($"Hello {id} {num} {third}");
}