C# 中没有合适的覆盖方法

Question

I have the following method in my code, which takes a Guid as a parameter. I want to override this method with one that takes a string as a parameter:

public class SendEmailApi: ISendEmailApi
{

     public async Task<EmailTemplate> GetTemplateByIdAsync(Guid templateId)
     {
         var response = await _emailClient.RequestAsync(EmailClient.Method.GET, urlPath: $"templates/{templateId}");

         return JsonConvert.DeserializeObject<EmailTemplate>(await response.Body.ReadAsStringAsync());
     }
}

However when I try to implement, I get the error that there is no suitable method to override.

public async override Task<EmailTemplate> GetTemplateByIdAsync(string templateId)
{
     var response = await _emailClient.RequestAsync(EmailClient.Method.GET, urlPath: $"templates/{templateId}");

     return JsonConvert.DeserializeObject<EmailTemplate>(await response.Body.ReadAsStringAsync());
}      

The interface looks like this:

public interface ISendEmailApi
{
    Task<EmailTemplate> GetTemplateByIdAsync(Guid templateId);
}

I am relatively new to C# and .NET and any advice would be appreciated - I am sure I am missing something obvious? Thanks

Answer 1

The other method you want is not an override , override means you're overriding a virtual method in the base class. And you have no base class.

Remove the override keyword in your function and it will work as you want.

Answer 2

The error is correct. In order to override an existing method it has to have the exact same signature as the method it is overriding. Since your method takes in a string it can't override a method that takes in a Guid. Instead I think you want to overload the method ( Overloading and overriding .)