我只是MVC的新手,并通过在线教程进行学习。在我的代码中,我只是使用实体框架从数据库中检索数据。我在模型中添加了[Key]
属性,但仍面临异常错误。我还需要做些什么来运行应用程序?真的,需要帮助!错误:在System.Data.dll中发生类型'System.ArgumentException'的异常,但未在用户代码中处理
控制器:
public class EmployeeDetailsController : Controller
{
public ActionResult details(int id)
{
EmployeeContext employeecontext = new EmployeeContext();
Employee employee = employeecontext.Employees.Single(emp => emp.emp_id == id);
return View(employee);
}
}
Employeecontext.cs
public class EmployeeContext : DbContext
{
public DbSet<Employee> Employees { get; set; }
}
Employee.cs:
[Table("tbl_employee")]
public class Employee
{
//[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
[Key]
public int emp_id { get; set; }
public string emp_name { get; set; }
public string emp_email { get; set; }
}
视图(details.cs.html):
....
<h2> Employee Details</h2>
<div>
Customer id : @Model.emp_id
Customer name : @Model.emp_name
Customer email : @Model.emp_email
</div>
Web.config文件:
<connectionStrings>
<add name="EmployeeContext"
connectionString="Data Source=192.168.4.201;Initial Catalog=nhphealthnew1;User ID=teamaardee;[email protected]#1234#!"
providerName="System.Data.SqlClient" />
</connectionStrings>
调试你的代码!哪一行代码会引发异常,以及异常的详细信息。 –
'Employee.cs:'是EF的自动生成的类? –
调试后代码在Employeedetailscontroller中出错,“Employee employee = employeecontext.Employees.Single(emp => emp.emp_id == id);”错误:类型为'System.Data.Entity.Core.EntityCommandExecutionException'的异常发生在EntityFramework.SqlServer.dll中,但未在用户代码中处理 附加信息:执行命令定义时发生错误。详情请参阅内部例外。 –