获取响应返回枚举值而不是枚举文本

Question

我从LINQ调用了以下Web API查询。当我打破查询并检查值时，AlertType显示Enum的字符串值。当我在浏览器中检查响应时，alertType显示枚举的int值。谁能告诉我这里发生了什么？

[Route("api/Alert/GetAlertsByUser")]
public async Task<List<AlertConfigVM>> GetAlertsByUser()
{
    try
    {
        var user = await securityService.GetUser(User.Identity.Name);
        return await service.GetAlertsByUser(user.Id);
    }
    catch (Exception ex)
    {
        ErrorHandler.ProcessApiError(ex);
        return null;
    }
}

这是linq查询

async public Task<List<AlertConfigVM>> GetAlertsByUser(string userId)
{
    using (var ctx = new JudgePortalContext())
    {
        var query = ctx.UserAlerts.Include(x=>x.DocumentType).Where(x => x.UserId == userId).ToList();
        var alerts = query.Select(u => new AlertConfigVM
        {
            UserId = u.UserId,
            Destination = u.AlertDestination,
            AlertType =  (AlertTypes)u.TypeofAlert,
            HourInterval = u.IntervalAsHours,
            DocumentTypeName= u.DocumentType?.Name??string.Empty
        }).ToList();

        return alerts;
    }
}

这是返回类型和枚举

public enum AlertTypes
{
    Email=0,
    Text =1
}

public class AlertConfigVM
{
    public int Id { get; set; }
    public string UserId { get; set; }
    public User User { get; set; }
    public AlertTypes AlertType { get; set; }
    public string Destination { get; set; }
    public int? DocumentTypeId { get; set; }
    public string DocumentTypeName { get; set; }
    public int? HourInterval { get; set; }
}