1

我有 2 张桌子：tbleducation 和 tblemployee。tblemployee 表有诸如：employeeID、employeeName 等字段，而 tbleducation 有诸如：Id、employeeID 等字段。

我想创建一个下拉列表，从 tblemployee 表中选择一个给定employeeName 的employeeID，以便将其插入到tbleducation 中。我编写的代码如下：

模型

public class UserModels
{

    public string EmployeeName { get; set; }
    public int EmployeeCode { get; set; }
    public IEnumerable<SelectListItem> Employee { set; get; }
}

控制器

[HttpPost]
public ActionResult Education(FormCollection edu)
{
    tblEmployee_Education education = new tblEmployee_Education();
    education.EmployeeID = Convert.ToInt32(edu["EmployeeName"].ToString());
    education.Duration = edu["Duration"].ToString();
    education.Certificate = edu["Certificate"].ToString();
    education.Country = edu["Country"].ToString();
    education.SchoolName = edu["SchoolName"].ToString();
    education.Major = edu["Major"].ToString();
    education.SubDescript = edu["SubDescript"].ToString();
    context.AddTotblEmployee_Education(education);
    context.SaveChanges();
    return View();
}

看法

<%= Html.DropDownListFor(x => x.EmployeeName, Model.Employee, "select EmployeeName")%>

当我尝试插入时，我收到以下错误消息：

“INSERT 语句与 FOREIGN KEY 约束 FK_tblEmployee_Education_tblEmployee_Employee 冲突”。冲突发生在数据库“MP_DBS_old”、表“dbo.tblEmployee_Employee”、列“代码”中。该语句已终止。”

我知道发生此错误是因为下拉列表中的值是一个字符串，并且数据库需要一个整数（employeeID）。我真的不知道如何解决它。请任何人帮助我！

4

1 回答 1

1

您收到此错误是因为您尝试插入 EmployeeName 而不是 EmployeeID。

Html.DropDownListFor(x => x.EmployeeName, Model.Employee, "select EmployeeName")%>: 错误

您正在填充 EmployeeName int dropdowmlist 。正确的路线是这样

Html.DropDownListFor(x => x.EmployeeID , Model.Employee, "select EmployeeName")%>

接下来，您必须在此行中进行更正：

    education.EmployeeID =  Convert.ToInt32(edu["EmployeeID "].ToString())

我认为这将解决您的问题

于 2012-08-02T04:50:01.600 回答