无法从“Microsoft.AspNetCore.Mvc.ActionResult”转换为“System.Collections.Generic.IEnumerable<string>”

Question

我在控制器中有异步方法，可以从客户端调用该方法。我想在 foreach 循环中迭代此方法，但出现错误：

*Cannot convert from 'Microsoft.AspNetCore.Mvc.ActionResult' to 'System.Collections.Generic.IEnumerable<string>'*

单元测试.cs

[TestFixture]
    public class ClientUnitTests 
    {
        private MessagesController Controller = new MessagesController(null, null, null);

        [Test]
        public async Task Check_API_Links()
        {
            // Arrange
            List<IEnumerable<string>> reporteeList = new List<IEnumerable<string>>();

            var links = await Controller.GetLinks();
            reporteeList.Add(links); //Cannot convert from 'Microsoft.AspNetCore.Mvc.ActionResult' to 'System.Collections.Generic.IEnumerable<string>'
            foreach (var itemLink in reporteeList)
            {
                reporteeList.Add(itemLink);
            }

            // Assert
            Assert.IsNotNull(reporteeList);
            Assert.GreaterOrEqual(0, reporteeList.Count);
            Assert.IsInstanceOf<IEnumerable<string>>(reporteeList);
        }
}

控制器.cs

[HttpGet]
 public async Task<ActionResult> GetLinks()
 {
   var result = await _client.GetLinks();

    return Ok(result);
 }

客户端.cs

public async Task<ActionResult<IEnumerable<string>>> GetLinks()
{
   // Some logic here, 
}

如何解决这个问题以在单元测试中迭代 GetLinks 方法？

谢谢。

Answer 1

假设.NET Core 2.1

public async Task<ActionResult<IEnumerable<string>>> GetLinks()

或较不优选的

public async Task<IActionResult> GetLinks()