C# 使用umbraco mvc 5在数据库中插入数据

我试图将表单中输入的数据存储到数据库表中，但它根本不起作用，这是模型和控制器，有人想看看，使用mvc 5和umbraco

[TableName("staffOnGoingTraining")]  
[PrimaryKey("id")]  
public class CreateEmployeeViewModel    
{
    [HiddenInput(DisplayValue = false)]  
    public int id { get; set; }

    [Required]
    [Display(Name = "Training Name")]
    public string TrainingName { get; set; }
    [Required]
    [Display(Name = "Expected Cost")]
    public string TrainingCost { get; set; }
    [Display(Name = "Start Date")]
    public DateTime TrainingStartDate { get; set; }
    [Display(Name = "Expected Completion Date")]
    [UIHint("NullableDateTime")]
    public DateTime TrainingExpires { get; set; }
}

public class CreateEmployeeViewController : SurfaceController
{

    [HttpPost]
    public ActionResult AddEmployee(CreateEmployeeViewModel viewModel)
    {

        if (Utils.staffDetail.accessLevel > accessLevel.admin)
        {
            return Content("You are not authorized to edit this information");
        }

        if (ModelState.IsValid)
        {
            var db = ApplicationContext.DatabaseContext.Database;
            var sql = new Umbraco.Core.Persistence.Sql();
            db.Insert(viewModel);
            return PartialView("_Create", viewModel);
        }

        return Content("Thank you, your changes have been saved");

    }
}

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“它根本不起作用”你能详细解释一下吗？你有什么错误吗？您是否在控制器中一步一步地调试操作？

它根本不工作

这意味着什么？你有什么错误吗？什么错误？调试后您的发现是什么？